From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- INSTALL/README | 6 + INSTALL/binaries.html | 126 ++++ INSTALL/build.html | 380 +++++++++++ INSTALL/configure.html | 1249 +++++++++++++++++++++++++++++++++++ INSTALL/download.html | 97 +++ INSTALL/finalinstall.html | 174 +++++ INSTALL/gfdl.html | 517 +++++++++++++++ INSTALL/index.html | 125 ++++ INSTALL/old.html | 213 ++++++ INSTALL/prerequisites.html | 297 +++++++++ INSTALL/specific.html | 1561 ++++++++++++++++++++++++++++++++++++++++++++ INSTALL/test.html | 233 +++++++ 12 files changed, 4978 insertions(+) create mode 100644 INSTALL/README create mode 100644 INSTALL/binaries.html create mode 100644 INSTALL/build.html create mode 100644 INSTALL/configure.html create mode 100644 INSTALL/download.html create mode 100644 INSTALL/finalinstall.html create mode 100644 INSTALL/gfdl.html create mode 100644 INSTALL/index.html create mode 100644 INSTALL/old.html create mode 100644 INSTALL/prerequisites.html create mode 100644 INSTALL/specific.html create mode 100644 INSTALL/test.html (limited to 'INSTALL') diff --git a/INSTALL/README b/INSTALL/README new file mode 100644 index 000000000..27bd1738b --- /dev/null +++ b/INSTALL/README @@ -0,0 +1,6 @@ +This directory has been obsoleted for GCC snapshots and CVS access. + +For releases the installation documentation is generated from +gcc/doc/install.texi and copied into this directory. + +To read this documentation, please point your HTML browser to "index.html". diff --git a/INSTALL/binaries.html b/INSTALL/binaries.html new file mode 100644 index 000000000..f360b1a8a --- /dev/null +++ b/INSTALL/binaries.html @@ -0,0 +1,126 @@ + + +Installing GCC: Binaries + + + + + + + + + + +

Installing GCC: Binaries

+ +We are often asked about pre-compiled versions of GCC. While we cannot +provide these for all platforms, below you'll find links to binaries for +various platforms where creating them by yourself is not easy due to various +reasons. + +

Please note that we did not create these binaries, nor do we +support them. If you have any problems installing them, please +contact their makers. + +

+ +

+

Return to the GCC Installation page + + + + + + + + diff --git a/INSTALL/build.html b/INSTALL/build.html new file mode 100644 index 000000000..644900fd6 --- /dev/null +++ b/INSTALL/build.html @@ -0,0 +1,380 @@ + + +Installing GCC: Building + + + + + + + + + + +

Installing GCC: Building

+ +Now that GCC is configured, you are ready to build the compiler and +runtime libraries. + +

Some commands executed when making the compiler may fail (return a +nonzero status) and be ignored by make. These failures, which +are often due to files that were not found, are expected, and can safely +be ignored. + +

It is normal to have compiler warnings when compiling certain files. +Unless you are a GCC developer, you can generally ignore these warnings +unless they cause compilation to fail. Developers should attempt to fix +any warnings encountered, however they can temporarily continue past +warnings-as-errors by specifying the configure flag +--disable-werror. + +

On certain old systems, defining certain environment variables such as +CC can interfere with the functioning of make. + +

If you encounter seemingly strange errors when trying to build the +compiler in a directory other than the source directory, it could be +because you have previously configured the compiler in the source +directory. Make sure you have done all the necessary preparations. + +

If you build GCC on a BSD system using a directory stored in an old System +V file system, problems may occur in running fixincludes if the +System V file system doesn't support symbolic links. These problems +result in a failure to fix the declaration of size_t in +sys/types.h. If you find that size_t is a signed type and +that type mismatches occur, this could be the cause. + +

The solution is not to use such a directory for building GCC. + +

Similarly, when building from SVN or snapshots, or if you modify +*.l files, you need the Flex lexical analyzer generator +installed. If you do not modify *.l files, releases contain +the Flex-generated files and you do not need Flex installed to build +them. There is still one Flex-based lexical analyzer (part of the +build machinery, not of GCC itself) that is used even if you only +build the C front end. + +

When building from SVN or snapshots, or if you modify Texinfo +documentation, you need version 4.7 or later of Texinfo installed if you +want Info documentation to be regenerated. Releases contain Info +documentation pre-built for the unmodified documentation in the release. + +

Building a native compiler

+ +

For a native build, the default configuration is to perform +a 3-stage bootstrap of the compiler when ‘make’ is invoked. +This will build the entire GCC system and ensure that it compiles +itself correctly. It can be disabled with the --disable-bootstrap +parameter to ‘configure’, but bootstrapping is suggested because +the compiler will be tested more completely and could also have +better performance. + +

The bootstrapping process will complete the following steps: + +

+ +

If you are short on disk space you might consider ‘make +bootstrap-lean’ instead. The sequence of compilation is the +same described above, but object files from the stage1 and +stage2 of the 3-stage bootstrap of the compiler are deleted as +soon as they are no longer needed. + +

If you wish to use non-default GCC flags when compiling the stage2 +and stage3 compilers, set BOOT_CFLAGS on the command line when +doing ‘make’. For example, if you want to save additional space +during the bootstrap and in the final installation as well, you can +build the compiler binaries without debugging information as in the +following example. This will save roughly 40% of disk space both for +the bootstrap and the final installation. (Libraries will still contain +debugging information.) + +

     make BOOT_CFLAGS='-O' bootstrap
+
+

You can place non-default optimization flags into BOOT_CFLAGS; they +are less well tested here than the default of ‘-g -O2’, but should +still work. In a few cases, you may find that you need to specify special +flags such as -msoft-float here to complete the bootstrap; or, +if the native compiler miscompiles the stage1 compiler, you may need +to work around this, by choosing BOOT_CFLAGS to avoid the parts +of the stage1 compiler that were miscompiled, or by using ‘make +bootstrap4’ to increase the number of stages of bootstrap. + +

BOOT_CFLAGS does not apply to bootstrapped target libraries. +Since these are always compiled with the compiler currently being +bootstrapped, you can use CFLAGS_FOR_TARGET to modify their +compilation flags, as for non-bootstrapped target libraries. +Again, if the native compiler miscompiles the stage1 compiler, you may +need to work around this by avoiding non-working parts of the stage1 +compiler. Use STAGE1_TFLAGS to this end. + +

If you used the flag --enable-languages=... to restrict +the compilers to be built, only those you've actually enabled will be +built. This will of course only build those runtime libraries, for +which the particular compiler has been built. Please note, +that re-defining LANGUAGES when calling ‘make’ +does not work anymore! + +

If the comparison of stage2 and stage3 fails, this normally indicates +that the stage2 compiler has compiled GCC incorrectly, and is therefore +a potentially serious bug which you should investigate and report. (On +a few systems, meaningful comparison of object files is impossible; they +always appear “different”. If you encounter this problem, you will +need to disable comparison in the Makefile.) + +

If you do not want to bootstrap your compiler, you can configure with +--disable-bootstrap. In particular cases, you may want to +bootstrap your compiler even if the target system is not the same as +the one you are building on: for example, you could build a +powerpc-unknown-linux-gnu toolchain on a +powerpc64-unknown-linux-gnu host. In this case, pass +--enable-bootstrap to the configure script. + +

BUILD_CONFIG can be used to bring in additional customization +to the build. It can be set to a whitespace-separated list of names. +For each such NAME, top-level config/NAME.mk will +be included by the top-level Makefile, bringing in any settings +it contains. The default BUILD_CONFIG can be set using the +configure option --with-build-config=NAME.... Some +examples of supported build configurations are: + +

+
‘bootstrap-O1’
Removes any -O-started option from BOOT_CFLAGS, and adds +-O1 to it. ‘BUILD_CONFIG=bootstrap-O1’ is equivalent to +‘BOOT_CFLAGS='-g -O1'’. + +
‘bootstrap-O3’
Analogous to bootstrap-O1. + +
‘bootstrap-lto’
Enables Link-Time Optimization for host tools during bootstrapping. +‘BUILD_CONFIG=bootstrap-lto’ is equivalent to adding +-flto to ‘BOOT_CFLAGS’. + +
‘bootstrap-debug’
Verifies that the compiler generates the same executable code, whether +or not it is asked to emit debug information. To this end, this +option builds stage2 host programs without debug information, and uses +contrib/compare-debug to compare them with the stripped stage3 +object files. If BOOT_CFLAGS is overridden so as to not enable +debug information, stage2 will have it, and stage3 won't. This option +is enabled by default when GCC bootstrapping is enabled, if +strip can turn object files compiled with and without debug +info into identical object files. In addition to better test +coverage, this option makes default bootstraps faster and leaner. + +
‘bootstrap-debug-big’
Rather than comparing stripped object files, as in +bootstrap-debug, this option saves internal compiler dumps +during stage2 and stage3 and compares them as well, which helps catch +additional potential problems, but at a great cost in terms of disk +space. It can be specified in addition to ‘bootstrap-debug’. + +
‘bootstrap-debug-lean’
This option saves disk space compared with bootstrap-debug-big, +but at the expense of some recompilation. Instead of saving the dumps +of stage2 and stage3 until the final compare, it uses +-fcompare-debug to generate, compare and remove the dumps +during stage3, repeating the compilation that already took place in +stage2, whose dumps were not saved. + +
‘bootstrap-debug-lib’
This option tests executable code invariance over debug information +generation on target libraries, just like bootstrap-debug-lean +tests it on host programs. It builds stage3 libraries with +-fcompare-debug, and it can be used along with any of the +bootstrap-debug options above. + +

There aren't -lean or -big counterparts to this option +because most libraries are only build in stage3, so bootstrap compares +would not get significant coverage. Moreover, the few libraries built +in stage2 are used in stage3 host programs, so we wouldn't want to +compile stage2 libraries with different options for comparison purposes. + +

‘bootstrap-debug-ckovw’
Arranges for error messages to be issued if the compiler built on any +stage is run without the option -fcompare-debug. This is +useful to verify the full -fcompare-debug testing coverage. It +must be used along with bootstrap-debug-lean and +bootstrap-debug-lib. + +
‘bootstrap-time’
Arranges for the run time of each program started by the GCC driver, +built in any stage, to be logged to time.log, in the top level of +the build tree. + +
+ +

Building a cross compiler

+ +

When building a cross compiler, it is not generally possible to do a +3-stage bootstrap of the compiler. This makes for an interesting problem +as parts of GCC can only be built with GCC. + +

To build a cross compiler, we recommend first building and installing a +native compiler. You can then use the native GCC compiler to build the +cross compiler. The installed native compiler needs to be GCC version +2.95 or later. + +

If the cross compiler is to be built with support for the Java +programming language and the ability to compile .java source files is +desired, the installed native compiler used to build the cross +compiler needs to be the same GCC version as the cross compiler. In +addition the cross compiler needs to be configured with +--with-ecj-jar=.... + +

Assuming you have already installed a native copy of GCC and configured +your cross compiler, issue the command make, which performs the +following steps: + +

+ +

Note that if an error occurs in any step the make process will exit. + +

If you are not building GNU binutils in the same source tree as GCC, +you will need a cross-assembler and cross-linker installed before +configuring GCC. Put them in the directory +prefix/target/bin. Here is a table of the tools +you should put in this directory: + +

+
as
This should be the cross-assembler. + +
ld
This should be the cross-linker. + +
ar
This should be the cross-archiver: a program which can manipulate +archive files (linker libraries) in the target machine's format. + +
ranlib
This should be a program to construct a symbol table in an archive file. +
+ +

The installation of GCC will find these programs in that directory, +and copy or link them to the proper place to for the cross-compiler to +find them when run later. + +

The easiest way to provide these files is to build the Binutils package. +Configure it with the same --host and --target +options that you use for configuring GCC, then build and install +them. They install their executables automatically into the proper +directory. Alas, they do not support all the targets that GCC +supports. + +

If you are not building a C library in the same source tree as GCC, +you should also provide the target libraries and headers before +configuring GCC, specifying the directories with +--with-sysroot or --with-headers and +--with-libs. Many targets also require “start files” such +as crt0.o and +crtn.o which are linked into each executable. There may be several +alternatives for crt0.o, for use with profiling or other +compilation options. Check your target's definition of +STARTFILE_SPEC to find out what start files it uses. + +

Building in parallel

+ +

GNU Make 3.80 and above, which is necessary to build GCC, support +building in parallel. To activate this, you can use ‘make -j 2’ +instead of ‘make’. You can also specify a bigger number, and +in most cases using a value greater than the number of processors in +your machine will result in fewer and shorter I/O latency hits, thus +improving overall throughput; this is especially true for slow drives +and network filesystems. + +

Building the Ada compiler

+ +

In order to build GNAT, the Ada compiler, you need a working GNAT +compiler (GCC version 4.0 or later). +This includes GNAT tools such as gnatmake and +gnatlink, since the Ada front end is written in Ada and +uses some GNAT-specific extensions. + +

In order to build a cross compiler, it is suggested to install +the new compiler as native first, and then use it to build the cross +compiler. + +

configure does not test whether the GNAT installation works +and has a sufficiently recent version; if too old a GNAT version is +installed, the build will fail unless --enable-languages is +used to disable building the Ada front end. + +

ADA_INCLUDE_PATH and ADA_OBJECT_PATH environment variables +must not be set when building the Ada compiler, the Ada tools, or the +Ada runtime libraries. You can check that your build environment is clean +by verifying that ‘gnatls -v’ lists only one explicit path in each +section. + +

Building with profile feedback

+ +

It is possible to use profile feedback to optimize the compiler itself. This +should result in a faster compiler binary. Experiments done on x86 using gcc +3.3 showed approximately 7 percent speedup on compiling C programs. To +bootstrap the compiler with profile feedback, use make profiledbootstrap. + +

When ‘make profiledbootstrap’ is run, it will first build a stage1 +compiler. This compiler is used to build a stageprofile compiler +instrumented to collect execution counts of instruction and branch +probabilities. Then runtime libraries are compiled with profile collected. +Finally a stagefeedback compiler is built using the information collected. + +

Unlike standard bootstrap, several additional restrictions apply. The +compiler used to build stage1 needs to support a 64-bit integral type. +It is recommended to only use GCC for this. Also parallel make is currently +not supported since collisions in profile collecting may occur. + +

+

Return to the GCC Installation page + + + + + + + + + + + diff --git a/INSTALL/configure.html b/INSTALL/configure.html new file mode 100644 index 000000000..6bb61c688 --- /dev/null +++ b/INSTALL/configure.html @@ -0,0 +1,1249 @@ + + +Installing GCC: Configuration + + + + + + + + + + +

Installing GCC: Configuration

+ +Like most GNU software, GCC must be configured before it can be built. +This document describes the recommended configuration procedure +for both native and cross targets. + +

We use srcdir to refer to the toplevel source directory for +GCC; we use objdir to refer to the toplevel build/object directory. + +

If you obtained the sources via SVN, srcdir must refer to the top +gcc directory, the one where the MAINTAINERS file can be +found, and not its gcc subdirectory, otherwise the build will fail. + +

If either srcdir or objdir is located on an automounted NFS +file system, the shell's built-in pwd command will return +temporary pathnames. Using these can lead to various sorts of build +problems. To avoid this issue, set the PWDCMD environment +variable to an automounter-aware pwd command, e.g., +pawd or ‘amq -w’, during the configuration and build +phases. + +

First, we highly recommend that GCC be built into a +separate directory from the sources which does not reside +within the source tree. This is how we generally build GCC; building +where srcdir == objdir should still work, but doesn't +get extensive testing; building where objdir is a subdirectory +of srcdir is unsupported. + +

If you have previously built GCC in the same directory for a +different target machine, do ‘make distclean’ to delete all files +that might be invalid. One of the files this deletes is Makefile; +if ‘make distclean’ complains that Makefile does not exist +or issues a message like “don't know how to make distclean” it probably +means that the directory is already suitably clean. However, with the +recommended method of building in a separate objdir, you should +simply use a different objdir for each target. + +

Second, when configuring a native system, either cc or +gcc must be in your path or you must set CC in +your environment before running configure. Otherwise the configuration +scripts may fail. + +

To configure GCC: + +

     % mkdir objdir
+     % cd objdir
+     % srcdir/configure [options] [target]
+
+

Distributor options

+ +

If you will be distributing binary versions of GCC, with modifications +to the source code, you should use the options described in this +section to make clear that your version contains modifications. + +

+
--with-pkgversion=version
Specify a string that identifies your package. You may wish +to include a build number or build date. This version string will be +included in the output of gcc --version. This suffix does +not replace the default version string, only the ‘GCC’ part. + +

The default value is ‘GCC’. + +

--with-bugurl=url
Specify the URL that users should visit if they wish to report a bug. +You are of course welcome to forward bugs reported to you to the FSF, +if you determine that they are not bugs in your modifications. + +

The default value refers to the FSF's GCC bug tracker. + +

+ +

Target specification

+ + + +

Options specification

+ +

Use options to override several configure time options for +GCC. A list of supported options follows; ‘configure +--help’ may list other options, but those not listed below may not +work and should not normally be used. + +

Note that each --enable option has a corresponding +--disable option and that each --with option has a +corresponding --without option. + +

+
--prefix=dirname
Specify the toplevel installation +directory. This is the recommended way to install the tools into a directory +other than the default. The toplevel installation directory defaults to +/usr/local. + +

We highly recommend against dirname being the same or a +subdirectory of objdir or vice versa. If specifying a directory +beneath a user's home directory tree, some shells will not expand +dirname correctly if it contains the ‘~’ metacharacter; use +$HOME instead. + +

The following standard autoconf options are supported. Normally you +should not need to use these options. +

+
--exec-prefix=dirname
Specify the toplevel installation directory for architecture-dependent +files. The default is prefix. + +
--bindir=dirname
Specify the installation directory for the executables called by users +(such as gcc and g++). The default is +exec-prefix/bin. + +
--libdir=dirname
Specify the installation directory for object code libraries and +internal data files of GCC. The default is exec-prefix/lib. + +
--libexecdir=dirname
Specify the installation directory for internal executables of GCC. +The default is exec-prefix/libexec. + +
--with-slibdir=dirname
Specify the installation directory for the shared libgcc library. The +default is libdir. + +
--datarootdir=dirname
Specify the root of the directory tree for read-only architecture-independent +data files referenced by GCC. The default is prefix/share. + +
--infodir=dirname
Specify the installation directory for documentation in info format. +The default is datarootdir/info. + +
--datadir=dirname
Specify the installation directory for some architecture-independent +data files referenced by GCC. The default is datarootdir. + +
--docdir=dirname
Specify the installation directory for documentation files (other +than Info) for GCC. The default is datarootdir/doc. + +
--htmldir=dirname
Specify the installation directory for HTML documentation files. +The default is docdir. + +
--pdfdir=dirname
Specify the installation directory for PDF documentation files. +The default is docdir. + +
--mandir=dirname
Specify the installation directory for manual pages. The default is +datarootdir/man. (Note that the manual pages are only extracts +from the full GCC manuals, which are provided in Texinfo format. The manpages +are derived by an automatic conversion process from parts of the full +manual.) + +
--with-gxx-include-dir=dirname
Specify +the installation directory for G++ header files. The default depends +on other configuration options, and differs between cross and native +configurations. + +
+ +
--program-prefix=prefix
GCC supports some transformations of the names of its programs when +installing them. This option prepends prefix to the names of +programs to install in bindir (see above). For example, specifying +--program-prefix=foo- would result in ‘gcc’ +being installed as /usr/local/bin/foo-gcc. + +
--program-suffix=suffix
Appends suffix to the names of programs to install in bindir +(see above). For example, specifying --program-suffix=-3.1 +would result in ‘gcc’ being installed as +/usr/local/bin/gcc-3.1. + +
--program-transform-name=pattern
Applies the ‘sed’ script pattern to be applied to the names +of programs to install in bindir (see above). pattern has to +consist of one or more basic ‘sed’ editing commands, separated by +semicolons. For example, if you want the ‘gcc’ program name to be +transformed to the installed program /usr/local/bin/myowngcc and +the ‘g++’ program name to be transformed to +/usr/local/bin/gspecial++ without changing other program names, +you could use the pattern +--program-transform-name='s/^gcc$/myowngcc/; s/^g++$/gspecial++/' +to achieve this effect. + +

All three options can be combined and used together, resulting in more +complex conversion patterns. As a basic rule, prefix (and +suffix) are prepended (appended) before further transformations +can happen with a special transformation script pattern. + +

As currently implemented, this option only takes effect for native +builds; cross compiler binaries' names are not transformed even when a +transformation is explicitly asked for by one of these options. + +

For native builds, some of the installed programs are also installed +with the target alias in front of their name, as in +‘i686-pc-linux-gnu-gcc’. All of the above transformations happen +before the target alias is prepended to the name—so, specifying +--program-prefix=foo- and program-suffix=-3.1, the +resulting binary would be installed as +/usr/local/bin/i686-pc-linux-gnu-foo-gcc-3.1. + +

As a last shortcoming, none of the installed Ada programs are +transformed yet, which will be fixed in some time. + +

--with-local-prefix=dirname
Specify the +installation directory for local include files. The default is +/usr/local. Specify this option if you want the compiler to +search directory dirname/include for locally installed +header files instead of /usr/local/include. + +

You should specify --with-local-prefix only if your +site has a different convention (not /usr/local) for where to put +site-specific files. + +

The default value for --with-local-prefix is /usr/local +regardless of the value of --prefix. Specifying +--prefix has no effect on which directory GCC searches for +local header files. This may seem counterintuitive, but actually it is +logical. + +

The purpose of --prefix is to specify where to install +GCC. The local header files in /usr/local/include—if you put +any in that directory—are not part of GCC. They are part of other +programs—perhaps many others. (GCC installs its own header files in +another directory which is based on the --prefix value.) + +

Both the local-prefix include directory and the GCC-prefix include +directory are part of GCC's “system include” directories. Although these +two directories are not fixed, they need to be searched in the proper +order for the correct processing of the include_next directive. The +local-prefix include directory is searched before the GCC-prefix +include directory. Another characteristic of system include directories +is that pedantic warnings are turned off for headers in these directories. + +

Some autoconf macros add -I directory options to the +compiler command line, to ensure that directories containing installed +packages' headers are searched. When directory is one of GCC's +system include directories, GCC will ignore the option so that system +directories continue to be processed in the correct order. This +may result in a search order different from what was specified but the +directory will still be searched. + +

GCC automatically searches for ordinary libraries using +GCC_EXEC_PREFIX. Thus, when the same installation prefix is +used for both GCC and packages, GCC will automatically search for +both headers and libraries. This provides a configuration that is +easy to use. GCC behaves in a manner similar to that when it is +installed as a system compiler in /usr. + +

Sites that need to install multiple versions of GCC may not want to +use the above simple configuration. It is possible to use the +--program-prefix, --program-suffix and +--program-transform-name options to install multiple versions +into a single directory, but it may be simpler to use different prefixes +and the --with-local-prefix option to specify the location of the +site-specific files for each version. It will then be necessary for +users to specify explicitly the location of local site libraries +(e.g., with LIBRARY_PATH). + +

The same value can be used for both --with-local-prefix and +--prefix provided it is not /usr. This can be used +to avoid the default search of /usr/local/include. + +

Do not specify /usr as the --with-local-prefix! +The directory you use for --with-local-prefix must not +contain any of the system's standard header files. If it did contain +them, certain programs would be miscompiled (including GNU Emacs, on +certain targets), because this would override and nullify the header +file corrections made by the fixincludes script. + +

Indications are that people who use this option use it based on mistaken +ideas of what it is for. People use it as if it specified where to +install part of GCC. Perhaps they make this assumption because +installing GCC creates the directory. + +

--enable-shared[=package[,...]]
Build shared versions of libraries, if shared libraries are supported on +the target platform. Unlike GCC 2.95.x and earlier, shared libraries +are enabled by default on all platforms that support shared libraries. + +

If a list of packages is given as an argument, build shared libraries +only for the listed packages. For other packages, only static libraries +will be built. Package names currently recognized in the GCC tree are +‘libgcc’ (also known as ‘gcc’), ‘libstdc++’ (not +‘libstdc++-v3’), ‘libffi’, ‘zlib’, ‘boehm-gc’, +‘ada’, ‘libada’, ‘libjava’, ‘libgo’, and ‘libobjc’. +Note ‘libiberty’ does not support shared libraries at all. + +

Use --disable-shared to build only static libraries. Note that +--disable-shared does not accept a list of package names as +argument, only --enable-shared does. + +

--with-gnu-as
Specify that the compiler should assume that the +assembler it finds is the GNU assembler. However, this does not modify +the rules to find an assembler and will result in confusion if the +assembler found is not actually the GNU assembler. (Confusion may also +result if the compiler finds the GNU assembler but has not been +configured with --with-gnu-as.) If you have more than one +assembler installed on your system, you may want to use this option in +connection with --with-as=pathname or +--with-build-time-tools=pathname. + +

The following systems are the only ones where it makes a difference +whether you use the GNU assembler. On any other system, +--with-gnu-as has no effect. + +

    +
  • ‘hppa1.0-any-any’ +
  • ‘hppa1.1-any-any’ +
  • ‘sparc-sun-solaris2.any’ +
  • ‘sparc64-any-solaris2.any’ +
+ +
--with-as=pathname
Specify that the compiler should use the assembler pointed to by +pathname, rather than the one found by the standard rules to find +an assembler, which are: +
    +
  • Unless GCC is being built with a cross compiler, check the +libexec/gcc/target/version directory. +libexec defaults to exec-prefix/libexec; +exec-prefix defaults to prefix, which +defaults to /usr/local unless overridden by the +--prefix=pathname switch described above. target +is the target system triple, such as ‘sparc-sun-solaris2.7’, and +version denotes the GCC version, such as 3.0. + +
  • If the target system is the same that you are building on, check +operating system specific directories (e.g. /usr/ccs/bin on +Sun Solaris 2). + +
  • Check in the PATH for a tool whose name is prefixed by the +target system triple. + +
  • Check in the PATH for a tool whose name is not prefixed by the +target system triple, if the host and target system triple are +the same (in other words, we use a host tool if it can be used for +the target as well). +
+ +

You may want to use --with-as if no assembler +is installed in the directories listed above, or if you have multiple +assemblers installed and want to choose one that is not found by the +above rules. + +

--with-gnu-ld
Same as --with-gnu-as +but for the linker. + +
--with-ld=pathname
Same as --with-as +but for the linker. + +
--with-stabs
Specify that stabs debugging +information should be used instead of whatever format the host normally +uses. Normally GCC uses the same debug format as the host system. + +

On MIPS based systems and on Alphas, you must specify whether you want +GCC to create the normal ECOFF debugging format, or to use BSD-style +stabs passed through the ECOFF symbol table. The normal ECOFF debug +format cannot fully handle languages other than C. BSD stabs format can +handle other languages, but it only works with the GNU debugger GDB. + +

Normally, GCC uses the ECOFF debugging format by default; if you +prefer BSD stabs, specify --with-stabs when you configure GCC. + +

No matter which default you choose when you configure GCC, the user +can use the -gcoff and -gstabs+ options to specify explicitly +the debug format for a particular compilation. + +

--with-stabs is meaningful on the ISC system on the 386, also, if +--with-gas is used. It selects use of stabs debugging +information embedded in COFF output. This kind of debugging information +supports C++ well; ordinary COFF debugging information does not. + +

--with-stabs is also meaningful on 386 systems running SVR4. It +selects use of stabs debugging information embedded in ELF output. The +C++ compiler currently (2.6.0) does not support the DWARF debugging +information normally used on 386 SVR4 platforms; stabs provide a +workable alternative. This requires gas and gdb, as the normal SVR4 +tools can not generate or interpret stabs. + +

--enable-multiarch
Specify whether to enable or disable multiarch support. The default is +to check for glibc start files in a multiarch location, and enable it +if the files are found. The auto detection is enabled for native builds, +and for cross builds configured with --with-sysroot. +More documentation about multiarch can be found at +http://wiki.debian.org/Multiarch. + +
--disable-multilib
Specify that multiple target +libraries to support different target variants, calling +conventions, etc. should not be built. The default is to build a +predefined set of them. + +

Some targets provide finer-grained control over which multilibs are built +(e.g., --disable-softfloat): +

+
arc-*-elf*
biendian. + +
arm-*-*
fpu, 26bit, underscore, interwork, biendian, nofmult. + +
m68*-*-*
softfloat, m68881, m68000, m68020. + +
mips*-*-*
single-float, biendian, softfloat. + +
powerpc*-*-*, rs6000*-*-*
aix64, pthread, softfloat, powercpu, powerpccpu, powerpcos, biendian, +sysv, aix. + +
+ +
--with-multilib-list=list
--without-multilib-list
Specify what multilibs to build. +Currently only implemented for sh*-*-*. + +

list is a comma separated list of CPU names. These must be of the +form sh* or m* (in which case they match the compiler option +for that processor). The list should not contain any endian options - +these are handled by --with-endian. + +

If list is empty, then there will be no multilibs for extra +processors. The multilib for the secondary endian remains enabled. + +

As a special case, if an entry in the list starts with a ! +(exclamation point), then it is added to the list of excluded multilibs. +Entries of this sort should be compatible with ‘MULTILIB_EXCLUDES’ +(once the leading ! has been stripped). + +

If --with-multilib-list is not given, then a default set of +multilibs is selected based on the value of --target. This is +usually the complete set of libraries, but some targets imply a more +specialized subset. + +

Example 1: to configure a compiler for SH4A only, but supporting both +endians, with little endian being the default: + 

          --with-cpu=sh4a --with-endian=little,big --with-multilib-list=
+
+

Example 2: to configure a compiler for both SH4A and SH4AL-DSP, but with +only little endian SH4AL: + 

          --with-cpu=sh4a --with-endian=little,big \
+          --with-multilib-list=sh4al,!mb/m4al
+
+
--with-endian=endians
Specify what endians to use. +Currently only implemented for sh*-*-*. + +

endians may be one of the following: +

+
big
Use big endian exclusively. +
little
Use little endian exclusively. +
big,little
Use big endian by default. Provide a multilib for little endian. +
little,big
Use little endian by default. Provide a multilib for big endian. +
+ +
--enable-threads
Specify that the target +supports threads. This affects the Objective-C compiler and runtime +library, and exception handling for other languages like C++ and Java. +On some systems, this is the default. + +

In general, the best (and, in many cases, the only known) threading +model available will be configured for use. Beware that on some +systems, GCC has not been taught what threading models are generally +available for the system. In this case, --enable-threads is an +alias for --enable-threads=single. + +

--disable-threads
Specify that threading support should be disabled for the system. +This is an alias for --enable-threads=single. + +
--enable-threads=lib
Specify that +lib is the thread support library. This affects the Objective-C +compiler and runtime library, and exception handling for other languages +like C++ and Java. The possibilities for lib are: + +
+
aix
AIX thread support. +
dce
DCE thread support. +
gnat
Ada tasking support. For non-Ada programs, this setting is equivalent +to ‘single’. When used in conjunction with the Ada run time, it +causes GCC to use the same thread primitives as Ada uses. This option +is necessary when using both Ada and the back end exception handling, +which is the default for most Ada targets. +
mach
Generic MACH thread support, known to work on NeXTSTEP. (Please note +that the file needed to support this configuration, gthr-mach.h, is +missing and thus this setting will cause a known bootstrap failure.) +
no
This is an alias for ‘single’. +
posix
Generic POSIX/Unix98 thread support. +
posix95
Generic POSIX/Unix95 thread support. +
rtems
RTEMS thread support. +
single
Disable thread support, should work for all platforms. +
solaris
Sun Solaris 2/Unix International thread support. Only use this if you +really need to use this legacy API instead of the default, ‘posix’. +
vxworks
VxWorks thread support. +
win32
Microsoft Win32 API thread support. +
nks
Novell Kernel Services thread support. +
+ +
--enable-tls
Specify that the target supports TLS (Thread Local Storage). Usually +configure can correctly determine if TLS is supported. In cases where +it guesses incorrectly, TLS can be explicitly enabled or disabled with +--enable-tls or --disable-tls. This can happen if +the assembler supports TLS but the C library does not, or if the +assumptions made by the configure test are incorrect. + +
--disable-tls
Specify that the target does not support TLS. +This is an alias for --enable-tls=no. + +
--with-cpu=cpu
--with-cpu-32=cpu
--with-cpu-64=cpu
Specify which cpu variant the compiler should generate code for by default. +cpu will be used as the default value of the -mcpu= switch. +This option is only supported on some targets, including ARM, i386, M68k, +PowerPC, and SPARC. The --with-cpu-32 and +--with-cpu-64 options specify separate default CPUs for +32-bit and 64-bit modes; these options are only supported for i386, +x86-64 and PowerPC. + +
--with-schedule=cpu
--with-arch=cpu
--with-arch-32=cpu
--with-arch-64=cpu
--with-tune=cpu
--with-tune-32=cpu
--with-tune-64=cpu
--with-abi=abi
--with-fpu=type
--with-float=type
These configure options provide default values for the -mschedule=, +-march=, -mtune=, -mabi=, and -mfpu= +options and for -mhard-float or -msoft-float. As with +--with-cpu, which switches will be accepted and acceptable values +of the arguments depend on the target. + +
--with-mode=mode
Specify if the compiler should default to -marm or -mthumb. +This option is only supported on ARM targets. + +
--with-fpmath=isa
This options sets -mfpmath=sse by default and specifies the default +ISA for floating-point arithmetics. You can select either ‘sse’ which +enables -msse2 or ‘avx’ which enables -mavx by default. +This option is only supported on i386 and x86-64 targets. + +
--with-divide=type
Specify how the compiler should generate code for checking for +division by zero. This option is only supported on the MIPS target. +The possibilities for type are: +
+
traps
Division by zero checks use conditional traps (this is the default on +systems that support conditional traps). +
breaks
Division by zero checks use the break instruction. +
+ + + +
--with-llsc
On MIPS targets, make -mllsc the default when no +-mno-llsc option is passed. This is the default for +Linux-based targets, as the kernel will emulate them if the ISA does +not provide them. + +
--without-llsc
On MIPS targets, make -mno-llsc the default when no +-mllsc option is passed. + +
--with-synci
On MIPS targets, make -msynci the default when no +-mno-synci option is passed. + +
--without-synci
On MIPS targets, make -mno-synci the default when no +-msynci option is passed. This is the default. + +
--with-mips-plt
On MIPS targets, make use of copy relocations and PLTs. +These features are extensions to the traditional +SVR4-based MIPS ABIs and require support from GNU binutils +and the runtime C library. + +
--enable-__cxa_atexit
Define if you want to use __cxa_atexit, rather than atexit, to +register C++ destructors for local statics and global objects. +This is essential for fully standards-compliant handling of +destructors, but requires __cxa_atexit in libc. This option is currently +only available on systems with GNU libc. When enabled, this will cause +-fuse-cxa-atexit to be passed by default. + +
--enable-indirect-function
Define if you want to enable the ifunc attribute. This option is +currently only available on systems with GNU libc on certain targets. + +
--enable-target-optspace
Specify that target +libraries should be optimized for code space instead of code speed. +This is the default for the m32r platform. + +
--with-cpp-install-dir=dirname
Specify that the user visible cpp program should be installed +in prefix/dirname/cpp, in addition to bindir. + +
--enable-comdat
Enable COMDAT group support. This is primarily used to override the +automatically detected value. + +
--enable-initfini-array
Force the use of sections .init_array and .fini_array +(instead of .init and .fini) for constructors and +destructors. Option --disable-initfini-array has the +opposite effect. If neither option is specified, the configure script +will try to guess whether the .init_array and +.fini_array sections are supported and, if they are, use them. + +
--enable-build-with-cxx
Build GCC using a C++ compiler rather than a C compiler. This is an +experimental option which may become the default in a later release. + +
--enable-maintainer-mode
The build rules that regenerate the Autoconf and Automake output files as +well as the GCC master message catalog gcc.pot are normally +disabled. This is because it can only be rebuilt if the complete source +tree is present. If you have changed the sources and want to rebuild the +catalog, configuring with --enable-maintainer-mode will enable +this. Note that you need a recent version of the gettext tools +to do so. + +
--disable-bootstrap
For a native build, the default configuration is to perform +a 3-stage bootstrap of the compiler when ‘make’ is invoked, +testing that GCC can compile itself correctly. If you want to disable +this process, you can configure with --disable-bootstrap. + +
--enable-bootstrap
In special cases, you may want to perform a 3-stage build +even if the target and host triplets are different. +This is possible when the host can run code compiled for +the target (e.g. host is i686-linux, target is i486-linux). +Starting from GCC 4.2, to do this you have to configure explicitly +with --enable-bootstrap. + +
--enable-generated-files-in-srcdir
Neither the .c and .h files that are generated from Bison and flex nor the +info manuals and man pages that are built from the .texi files are present +in the SVN development tree. When building GCC from that development tree, +or from one of our snapshots, those generated files are placed in your +build directory, which allows for the source to be in a readonly +directory. + +

If you configure with --enable-generated-files-in-srcdir then those +generated files will go into the source directory. This is mainly intended +for generating release or prerelease tarballs of the GCC sources, since it +is not a requirement that the users of source releases to have flex, Bison, +or makeinfo. + +

--enable-version-specific-runtime-libs
Specify +that runtime libraries should be installed in the compiler specific +subdirectory (libdir/gcc) rather than the usual places. In +addition, ‘libstdc++’'s include files will be installed into +libdir unless you overruled it by using +--with-gxx-include-dir=dirname. Using this option is +particularly useful if you intend to use several versions of GCC in +parallel. This is currently supported by ‘libgfortran’, +‘libjava’, ‘libmudflap’, ‘libstdc++’, and ‘libobjc’. + +
--enable-languages=lang1,lang2,...
Specify that only a particular subset of compilers and +their runtime libraries should be built. For a list of valid values for +langN you can issue the following command in the +gcc directory of your GCC source tree:
+ 
          grep language= */config-lang.in
+
+

Currently, you can use any of the following: +all, ada, c, c++, fortran, +go, java, objc, obj-c++. +Building the Ada compiler has special requirements, see below. +If you do not pass this flag, or specify the option all, then all +default languages available in the gcc sub-tree will be configured. +Ada, Go and Objective-C++ are not default languages; the rest are. + +

--enable-stage1-languages=lang1,lang2,...
Specify that a particular subset of compilers and their runtime +libraries should be built with the system C compiler during stage 1 of +the bootstrap process, rather than only in later stages with the +bootstrapped C compiler. The list of valid values is the same as for +--enable-languages, and the option all will select all +of the languages enabled by --enable-languages. This option is +primarily useful for GCC development; for instance, when a development +version of the compiler cannot bootstrap due to compiler bugs, or when +one is debugging front ends other than the C front end. When this +option is used, one can then build the target libraries for the +specified languages with the stage-1 compiler by using make +stage1-bubble all-target, or run the testsuite on the stage-1 compiler +for the specified languages using make stage1-start check-gcc. + +
--disable-libada
Specify that the run-time libraries and tools used by GNAT should not +be built. This can be useful for debugging, or for compatibility with +previous Ada build procedures, when it was required to explicitly +do a ‘make -C gcc gnatlib_and_tools’. + +
--disable-libssp
Specify that the run-time libraries for stack smashing protection +should not be built. + +
--disable-libquadmath
Specify that the GCC quad-precision math library should not be built. +On some systems, the library is required to be linkable when building +the Fortran front end, unless --disable-libquadmath-support +is used. + +
--disable-libquadmath-support
Specify that the Fortran front end and libgfortran do not add +support for libquadmath on systems supporting it. + +
--disable-libgomp
Specify that the run-time libraries used by GOMP should not be built. + +
--with-dwarf2
Specify that the compiler should +use DWARF 2 debugging information as the default. + +
--enable-targets=all
--enable-targets=target_list
Some GCC targets, e.g. powerpc64-linux, build bi-arch compilers. +These are compilers that are able to generate either 64-bit or 32-bit +code. Typically, the corresponding 32-bit target, e.g. +powerpc-linux for powerpc64-linux, only generates 32-bit code. This +option enables the 32-bit target to be a bi-arch compiler, which is +useful when you want a bi-arch compiler that defaults to 32-bit, and +you are building a bi-arch or multi-arch binutils in a combined tree. +On mips-linux, this will build a tri-arch compiler (ABI o32/n32/64), +defaulted to o32. +Currently, this option only affects sparc-linux, powerpc-linux, x86-linux +and mips-linux. + +
--enable-secureplt
This option enables -msecure-plt by default for powerpc-linux. +See “RS/6000 and PowerPC Options” in the main manual + +
--enable-cld
This option enables -mcld by default for 32-bit x86 targets. +See “i386 and x86-64 Options” in the main manual + +
--enable-win32-registry
--enable-win32-registry=key
--disable-win32-registry
The --enable-win32-registry option enables Microsoft Windows-hosted GCC +to look up installations paths in the registry using the following key: + + 
          HKEY_LOCAL_MACHINE\SOFTWARE\Free Software Foundation\key
+
+

key defaults to GCC version number, and can be overridden by the +--enable-win32-registry=key option. Vendors and distributors +who use custom installers are encouraged to provide a different key, +perhaps one comprised of vendor name and GCC version number, to +avoid conflict with existing installations. This feature is enabled +by default, and can be disabled by --disable-win32-registry +option. This option has no effect on the other hosts. + +

--nfp
Specify that the machine does not have a floating point unit. This +option only applies to ‘m68k-sun-sunosn’. On any other +system, --nfp has no effect. + +
--enable-werror
--disable-werror
--enable-werror=yes
--enable-werror=no
When you specify this option, it controls whether certain files in the +compiler are built with -Werror in bootstrap stage2 and later. +If you don't specify it, -Werror is turned on for the main +development trunk. However it defaults to off for release branches and +final releases. The specific files which get -Werror are +controlled by the Makefiles. + +
--enable-checking
--enable-checking=list
When you specify this option, the compiler is built to perform internal +consistency checks of the requested complexity. This does not change the +generated code, but adds error checking within the compiler. This will +slow down the compiler and may only work properly if you are building +the compiler with GCC. This is ‘yes’ by default when building +from SVN or snapshots, but ‘release’ for releases. The default +for building the stage1 compiler is ‘yes’. More control +over the checks may be had by specifying list. The categories of +checks available are ‘yes’ (most common checks +‘assert,misc,tree,gc,rtlflag,runtime’), ‘no’ (no checks at +all), ‘all’ (all but ‘valgrind’), ‘release’ (cheapest +checks ‘assert,runtime’) or ‘none’ (same as ‘no’). +Individual checks can be enabled with these flags ‘assert’, +‘df’, ‘fold’, ‘gc’, ‘gcac’ ‘misc’, ‘rtl’, +‘rtlflag’, ‘runtime’, ‘tree’, and ‘valgrind’. + +

The ‘valgrind’ check requires the external valgrind +simulator, available from http://valgrind.org/. The +‘df’, ‘rtl’, ‘gcac’ and ‘valgrind’ checks are very expensive. +To disable all checking, ‘--disable-checking’ or +‘--enable-checking=none’ must be explicitly requested. Disabling +assertions will make the compiler and runtime slightly faster but +increase the risk of undetected internal errors causing wrong code to be +generated. + +

--disable-stage1-checking
--enable-stage1-checking
--enable-stage1-checking=list
If no --enable-checking option is specified the stage1 +compiler will be built with ‘yes’ checking enabled, otherwise +the stage1 checking flags are the same as specified by +--enable-checking. To build the stage1 compiler with +different checking options use --enable-stage1-checking. +The list of checking options is the same as for --enable-checking. +If your system is too slow or too small to bootstrap a released compiler +with checking for stage1 enabled, you can use ‘--disable-stage1-checking’ +to disable checking for the stage1 compiler. + +
--enable-coverage
--enable-coverage=level
With this option, the compiler is built to collect self coverage +information, every time it is run. This is for internal development +purposes, and only works when the compiler is being built with gcc. The +level argument controls whether the compiler is built optimized or +not, values are ‘opt’ and ‘noopt’. For coverage analysis you +want to disable optimization, for performance analysis you want to +enable optimization. When coverage is enabled, the default level is +without optimization. + +
--enable-gather-detailed-mem-stats
When this option is specified more detailed information on memory +allocation is gathered. This information is printed when using +-fmem-report. + +
--with-gc
--with-gc=choice
With this option you can specify the garbage collector implementation +used during the compilation process. choice can be one of +‘page’ and ‘zone’, where ‘page’ is the default. + +
--enable-nls
--disable-nls
The --enable-nls option enables Native Language Support (NLS), +which lets GCC output diagnostics in languages other than American +English. Native Language Support is enabled by default if not doing a +canadian cross build. The --disable-nls option disables NLS. + +
--with-included-gettext
If NLS is enabled, the --with-included-gettext option causes the build +procedure to prefer its copy of GNU gettext. + +
--with-catgets
If NLS is enabled, and if the host lacks gettext but has the +inferior catgets interface, the GCC build procedure normally +ignores catgets and instead uses GCC's copy of the GNU +gettext library. The --with-catgets option causes the +build procedure to use the host's catgets in this situation. + +
--with-libiconv-prefix=dir
Search for libiconv header files in dir/include and +libiconv library files in dir/lib. + +
--enable-obsolete
Enable configuration for an obsoleted system. If you attempt to +configure GCC for a system (build, host, or target) which has been +obsoleted, and you do not specify this flag, configure will halt with an +error message. + +

All support for systems which have been obsoleted in one release of GCC +is removed entirely in the next major release, unless someone steps +forward to maintain the port. + +

--enable-decimal-float
--enable-decimal-float=yes
--enable-decimal-float=no
--enable-decimal-float=bid
--enable-decimal-float=dpd
--disable-decimal-float
Enable (or disable) support for the C decimal floating point extension +that is in the IEEE 754-2008 standard. This is enabled by default only +on PowerPC, i386, and x86_64 GNU/Linux systems. Other systems may also +support it, but require the user to specifically enable it. You can +optionally control which decimal floating point format is used (either +‘bid’ or ‘dpd’). The ‘bid’ (binary integer decimal) +format is default on i386 and x86_64 systems, and the ‘dpd’ +(densely packed decimal) format is default on PowerPC systems. + +
--enable-fixed-point
--disable-fixed-point
Enable (or disable) support for C fixed-point arithmetic. +This option is enabled by default for some targets (such as MIPS) which +have hardware-support for fixed-point operations. On other targets, you +may enable this option manually. + +
--with-long-double-128
Specify if long double type should be 128-bit by default on selected +GNU/Linux architectures. If using --without-long-double-128, +long double will be by default 64-bit, the same as double type. +When neither of these configure options are used, the default will be +128-bit long double when built against GNU C Library 2.4 and later, +64-bit long double otherwise. + +
--with-gmp=pathname
--with-gmp-include=pathname
--with-gmp-lib=pathname
--with-mpfr=pathname
--with-mpfr-include=pathname
--with-mpfr-lib=pathname
--with-mpc=pathname
--with-mpc-include=pathname
--with-mpc-lib=pathname
If you do not have GMP (the GNU Multiple Precision library), the MPFR +library and/or the MPC library installed in a standard location and +you want to build GCC, you can explicitly specify the directory where +they are installed (‘--with-gmp=gmpinstalldir’, +‘--with-mpfr=mpfrinstalldir’, +‘--with-mpc=mpcinstalldir’). The +--with-gmp=gmpinstalldir option is shorthand for +--with-gmp-lib=gmpinstalldir/lib and +--with-gmp-include=gmpinstalldir/include. Likewise the +--with-mpfr=mpfrinstalldir option is shorthand for +--with-mpfr-lib=mpfrinstalldir/lib and +--with-mpfr-include=mpfrinstalldir/include, also the +--with-mpc=mpcinstalldir option is shorthand for +--with-mpc-lib=mpcinstalldir/lib and +--with-mpc-include=mpcinstalldir/include. If these +shorthand assumptions are not correct, you can use the explicit +include and lib options directly. You might also need to ensure the +shared libraries can be found by the dynamic linker when building and +using GCC, for example by setting the runtime shared library path +variable (LD_LIBRARY_PATH on GNU/Linux and Solaris systems). + +

These flags are applicable to the host platform only. When building +a cross compiler, they will not be used to configure target libraries. + +

--with-ppl=pathname
--with-ppl-include=pathname
--with-ppl-lib=pathname
--with-cloog=pathname
--with-cloog-include=pathname
--with-cloog-lib=pathname
If you do not have PPL (the Parma Polyhedra Library) and the CLooG +libraries installed in a standard location and you want to build GCC, +you can explicitly specify the directory where they are installed +(‘--with-ppl=pplinstalldir’, +‘--with-cloog=clooginstalldir’). The +--with-ppl=pplinstalldir option is shorthand for +--with-ppl-lib=pplinstalldir/lib and +--with-ppl-include=pplinstalldir/include. Likewise the +--with-cloog=clooginstalldir option is shorthand for +--with-cloog-lib=clooginstalldir/lib and +--with-cloog-include=clooginstalldir/include. If these +shorthand assumptions are not correct, you can use the explicit +include and lib options directly. + +

These flags are applicable to the host platform only. When building +a cross compiler, they will not be used to configure target libraries. + +

--with-host-libstdcxx=linker-args
If you are linking with a static copy of PPL, you can use this option +to specify how the linker should find the standard C++ library used +internally by PPL. Typical values of linker-args might be +‘-lstdc++’ or ‘-Wl,-Bstatic,-lstdc++,-Bdynamic -lm’. If you are +linking with a shared copy of PPL, you probably do not need this +option; shared library dependencies will cause the linker to search +for the standard C++ library automatically. + +
--with-stage1-ldflags=flags
This option may be used to set linker flags to be used when linking +stage 1 of GCC. These are also used when linking GCC if configured with +--disable-bootstrap. By default no special flags are used. + +
--with-stage1-libs=libs
This option may be used to set libraries to be used when linking stage 1 +of GCC. These are also used when linking GCC if configured with +--disable-bootstrap. The default is the argument to +--with-host-libstdcxx, if specified. + +
--with-boot-ldflags=flags
This option may be used to set linker flags to be used when linking +stage 2 and later when bootstrapping GCC. If neither –with-boot-libs +nor –with-host-libstdcxx is set to a value, then the default is +‘-static-libstdc++ -static-libgcc’. + +
--with-boot-libs=libs
This option may be used to set libraries to be used when linking stage 2 +and later when bootstrapping GCC. The default is the argument to +--with-host-libstdcxx, if specified. + +
--with-debug-prefix-map=map
Convert source directory names using -fdebug-prefix-map when +building runtime libraries. ‘map’ is a space-separated +list of maps of the form ‘old=new’. + +
--enable-linker-build-id
Tells GCC to pass --build-id option to the linker for all final +links (links performed without the -r or --relocatable +option), if the linker supports it. If you specify +--enable-linker-build-id, but your linker does not +support --build-id option, a warning is issued and the +--enable-linker-build-id option is ignored. The default is off. + +
--enable-gnu-unique-object
--disable-gnu-unique-object
Tells GCC to use the gnu_unique_object relocation for C++ template +static data members and inline function local statics. Enabled by +default for a native toolchain with an assembler that accepts it and +GLIBC 2.11 or above, otherwise disabled. + +
--enable-lto
--disable-lto
Enable support for link-time optimization (LTO). This is enabled by +default, and may be disabled using --disable-lto. + +
--with-plugin-ld=pathname
Enable an alternate linker to be used at link-time optimization (LTO) +link time when -fuse-linker-plugin is enabled. +This linker should have plugin support such as gold starting with +version 2.20 or GNU ld starting with version 2.21. +See -fuse-linker-plugin for details. +
+ +

Cross-Compiler-Specific Options

+ +

The following options only apply to building cross compilers. + +

+
--with-sysroot
--with-sysroot=dir
Tells GCC to consider dir as the root of a tree that contains +(a subset of) the root filesystem of the target operating system. +Target system headers, libraries and run-time object files will be +searched in there. More specifically, this acts as if +--sysroot=dir was added to the default options of the built +compiler. The specified directory is not copied into the +install tree, unlike the options --with-headers and +--with-libs that this option obsoletes. The default value, +in case --with-sysroot is not given an argument, is +${gcc_tooldir}/sys-root. If the specified directory is a +subdirectory of ${exec_prefix}, then it will be found relative to +the GCC binaries if the installation tree is moved. + +

This option affects the system root for the compiler used to build +target libraries (which runs on the build system) and the compiler newly +installed with make install; it does not affect the compiler which is +used to build GCC itself. + +

--with-build-sysroot
--with-build-sysroot=dir
Tells GCC to consider dir as the system root (see +--with-sysroot) while building target libraries, instead of +the directory specified with --with-sysroot. This option is +only useful when you are already using --with-sysroot. You +can use --with-build-sysroot when you are configuring with +--prefix set to a directory that is different from the one in +which you are installing GCC and your target libraries. + +

This option affects the system root for the compiler used to build +target libraries (which runs on the build system); it does not affect +the compiler which is used to build GCC itself. + +

--with-headers
--with-headers=dir
Deprecated in favor of --with-sysroot. +Specifies that target headers are available when building a cross compiler. +The dir argument specifies a directory which has the target include +files. These include files will be copied into the gcc install +directory. This option with the dir argument is required when +building a cross compiler, if prefix/target/sys-include +doesn't pre-exist. If prefix/target/sys-include does +pre-exist, the dir argument may be omitted. fixincludes +will be run on these files to make them compatible with GCC. + +
--without-headers
Tells GCC not use any target headers from a libc when building a cross +compiler. When crossing to GNU/Linux, you need the headers so GCC +can build the exception handling for libgcc. + +
--with-libs
--with-libs="dir1 dir2 ... dirN"
Deprecated in favor of --with-sysroot. +Specifies a list of directories which contain the target runtime +libraries. These libraries will be copied into the gcc install +directory. If the directory list is omitted, this option has no +effect. + +
--with-newlib
Specifies that ‘newlib’ is +being used as the target C library. This causes __eprintf to be +omitted from libgcc.a on the assumption that it will be provided by +‘newlib’. + +
--with-build-time-tools=dir
Specifies where to find the set of target tools (assembler, linker, etc.) +that will be used while building GCC itself. This option can be useful +if the directory layouts are different between the system you are building +GCC on, and the system where you will deploy it. + +

For example, on an ‘ia64-hp-hpux’ system, you may have the GNU +assembler and linker in /usr/bin, and the native tools in a +different path, and build a toolchain that expects to find the +native tools in /usr/bin. + +

When you use this option, you should ensure that dir includes +ar, as, ld, nm, +ranlib and strip if necessary, and possibly +objdump. Otherwise, GCC may use an inconsistent set of +tools. +

+ +

Java-Specific Options

+ +

The following option applies to the build of the Java front end. + +

+
--disable-libgcj
Specify that the run-time libraries +used by GCJ should not be built. This is useful in case you intend +to use GCJ with some other run-time, or you're going to install it +separately, or it just happens not to build on your particular +machine. In general, if the Java front end is enabled, the GCJ +libraries will be enabled too, unless they're known to not work on +the target platform. If GCJ is enabled but ‘libgcj’ isn't built, you +may need to port it; in this case, before modifying the top-level +configure.in so that ‘libgcj’ is enabled by default on this platform, +you may use --enable-libgcj to override the default. + +
+ +

The following options apply to building ‘libgcj’. + +

General Options
+ +
+
--enable-java-maintainer-mode
By default the ‘libjava’ build will not attempt to compile the +.java source files to .class. Instead, it will use the +.class files from the source tree. If you use this option you +must have executables named ecj1 and gjavah in your path +for use by the build. You must use this option if you intend to +modify any .java files in libjava. + +
--with-java-home=dirname
This ‘libjava’ option overrides the default value of the +‘java.home’ system property. It is also used to set +‘sun.boot.class.path’ to dirname/lib/rt.jar. By +default ‘java.home’ is set to prefix and +‘sun.boot.class.path’ to +datadir/java/libgcj-version.jar. + +
--with-ecj-jar=filename
This option can be used to specify the location of an external jar +file containing the Eclipse Java compiler. A specially modified +version of this compiler is used by gcj to parse +.java source files. If this option is given, the +‘libjava’ build will create and install an ecj1 executable +which uses this jar file at runtime. + +

If this option is not given, but an ecj.jar file is found in +the topmost source tree at configure time, then the ‘libgcj’ +build will create and install ecj1, and will also install the +discovered ecj.jar into a suitable place in the install tree. + +

If ecj1 is not installed, then the user will have to supply one +on his path in order for gcj to properly parse .java +source files. A suitable jar is available from +ftp://sourceware.org/pub/java/. + +

--disable-getenv-properties
Don't set system properties from GCJ_PROPERTIES. + +
--enable-hash-synchronization
Use a global hash table for monitor locks. Ordinarily, +‘libgcj’'s ‘configure’ script automatically makes +the correct choice for this option for your platform. Only use +this if you know you need the library to be configured differently. + +
--enable-interpreter
Enable the Java interpreter. The interpreter is automatically +enabled by default on all platforms that support it. This option +is really only useful if you want to disable the interpreter +(using --disable-interpreter). + +
--disable-java-net
Disable java.net. This disables the native part of java.net only, +using non-functional stubs for native method implementations. + +
--disable-jvmpi
Disable JVMPI support. + +
--disable-libgcj-bc
Disable BC ABI compilation of certain parts of libgcj. By default, +some portions of libgcj are compiled with -findirect-dispatch +and -fno-indirect-classes, allowing them to be overridden at +run-time. + +

If --disable-libgcj-bc is specified, libgcj is built without +these options. This allows the compile-time linker to resolve +dependencies when statically linking to libgcj. However it makes it +impossible to override the affected portions of libgcj at run-time. + +

--enable-reduced-reflection
Build most of libgcj with -freduced-reflection. This reduces +the size of libgcj at the expense of not being able to do accurate +reflection on the classes it contains. This option is safe if you +know that code using libgcj will never use reflection on the standard +runtime classes in libgcj (including using serialization, RMI or CORBA). + +
--with-ecos
Enable runtime eCos target support. + +
--without-libffi
Don't use ‘libffi’. This will disable the interpreter and JNI +support as well, as these require ‘libffi’ to work. + +
--enable-libgcj-debug
Enable runtime debugging code. + +
--enable-libgcj-multifile
If specified, causes all .java source files to be +compiled into .class files in one invocation of +‘gcj’. This can speed up build time, but is more +resource-intensive. If this option is unspecified or +disabled, ‘gcj’ is invoked once for each .java +file to compile into a .class file. + +
--with-libiconv-prefix=DIR
Search for libiconv in DIR/include and DIR/lib. + +
--enable-sjlj-exceptions
Force use of the setjmp/longjmp-based scheme for exceptions. +‘configure’ ordinarily picks the correct value based on the platform. +Only use this option if you are sure you need a different setting. + +
--with-system-zlib
Use installed ‘zlib’ rather than that included with GCC. + +
--with-win32-nlsapi=ansi, unicows or unicode
Indicates how MinGW ‘libgcj’ translates between UNICODE +characters and the Win32 API. + +
--enable-java-home
If enabled, this creates a JPackage compatible SDK environment during install. +Note that if –enable-java-home is used, –with-arch-directory=ARCH must also +be specified. + +
--with-arch-directory=ARCH
Specifies the name to use for the jre/lib/ARCH directory in the SDK +environment created when –enable-java-home is passed. Typical names for this +directory include i386, amd64, ia64, etc. + +
--with-os-directory=DIR
Specifies the OS directory for the SDK include directory. This is set to auto +detect, and is typically 'linux'. + +
--with-origin-name=NAME
Specifies the JPackage origin name. This defaults to the 'gcj' in +java-1.5.0-gcj. + +
--with-arch-suffix=SUFFIX
Specifies the suffix for the sdk directory. Defaults to the empty string. +Examples include '.x86_64' in 'java-1.5.0-gcj-1.5.0.0.x86_64'. + +
--with-jvm-root-dir=DIR
Specifies where to install the SDK. Default is $(prefix)/lib/jvm. + +
--with-jvm-jar-dir=DIR
Specifies where to install jars. Default is $(prefix)/lib/jvm-exports. + +
--with-python-dir=DIR
Specifies where to install the Python modules used for aot-compile. DIR should +not include the prefix used in installation. For example, if the Python modules +are to be installed in /usr/lib/python2.5/site-packages, then +–with-python-dir=/lib/python2.5/site-packages should be passed. If this is +not specified, then the Python modules are installed in $(prefix)/share/python. + +
--enable-aot-compile-rpm
Adds aot-compile-rpm to the list of installed scripts. + +
--enable-browser-plugin
Build the gcjwebplugin web browser plugin. + +
+
ansi
Use the single-byte char and the Win32 A functions natively, +translating to and from UNICODE when using these functions. If +unspecified, this is the default. + +
unicows
Use the WCHAR and Win32 W functions natively. Adds +-lunicows to libgcj.spec to link with ‘libunicows’. +unicows.dll needs to be deployed on Microsoft Windows 9X machines +running built executables. libunicows.a, an open-source +import library around Microsoft's unicows.dll, is obtained from +http://libunicows.sourceforge.net/, which also gives details +on getting unicows.dll from Microsoft. + +
unicode
Use the WCHAR and Win32 W functions natively. Does not +add -lunicows to libgcj.spec. The built executables will +only run on Microsoft Windows NT and above. +
+
+ +
AWT-Specific Options
+ +
+
--with-x
Use the X Window System. + +
--enable-java-awt=PEER(S)
Specifies the AWT peer library or libraries to build alongside +‘libgcj’. If this option is unspecified or disabled, AWT +will be non-functional. Current valid values are gtk and +xlib. Multiple libraries should be separated by a +comma (i.e. --enable-java-awt=gtk,xlib). + +
--enable-gtk-cairo
Build the cairo Graphics2D implementation on GTK. + +
--enable-java-gc=TYPE
Choose garbage collector. Defaults to boehm if unspecified. + +
--disable-gtktest
Do not try to compile and run a test GTK+ program. + +
--disable-glibtest
Do not try to compile and run a test GLIB program. + +
--with-libart-prefix=PFX
Prefix where libart is installed (optional). + +
--with-libart-exec-prefix=PFX
Exec prefix where libart is installed (optional). + +
--disable-libarttest
Do not try to compile and run a test libart program. + +
+ +
Overriding configure test results
+ +

Sometimes, it might be necessary to override the result of some +configure test, for example in order to ease porting to a new +system or work around a bug in a test. The toplevel configure +script provides three variables for this: + +

+
build_configargs
The contents of this variable is passed to all build configure +scripts. + +
host_configargs
The contents of this variable is passed to all host configure +scripts. + +
target_configargs
The contents of this variable is passed to all target configure +scripts. + +
+ +

In order to avoid shell and make quoting issues for complex +overrides, you can pass a setting for CONFIG_SITE and set +variables in the site file. + +

+

Return to the GCC Installation page + + + + + + + + + + + + diff --git a/INSTALL/download.html b/INSTALL/download.html new file mode 100644 index 000000000..68d0ba324 --- /dev/null +++ b/INSTALL/download.html @@ -0,0 +1,97 @@ + + +Downloading GCC + + + + + + + + + + +

Downloading GCC

+ +GCC is distributed via SVN and FTP +tarballs compressed with gzip or +bzip2. It is possible to download a full distribution or specific +components. + +

Please refer to the releases web page +for information on how to obtain GCC. + +

The full distribution includes the C, C++, Objective-C, Fortran, Java, +and Ada (in the case of GCC 3.1 and later) compilers. The full +distribution also includes runtime libraries for C++, Objective-C, +Fortran, and Java. In GCC 3.0 and later versions, the GNU compiler +testsuites are also included in the full distribution. + +

If you choose to download specific components, you must download the core +GCC distribution plus any language specific distributions you wish to +use. The core distribution includes the C language front end as well as the +shared components. Each language has a tarball which includes the language +front end as well as the language runtime (when appropriate). + +

Unpack the core distribution as well as any language specific +distributions in the same directory. + +

If you also intend to build binutils (either to upgrade an existing +installation or for use in place of the corresponding tools of your +OS), unpack the binutils distribution either in the same directory or +a separate one. In the latter case, add symbolic links to any +components of the binutils you intend to build alongside the compiler +(bfd, binutils, gas, gprof, ld, +opcodes, ...) to the directory containing the GCC sources. + +

Likewise the GMP, MPFR and MPC libraries can be automatically built +together with GCC. Unpack the GMP, MPFR and/or MPC source +distributions in the directory containing the GCC sources and rename +their directories to gmp, mpfr and mpc, +respectively (or use symbolic links with the same name). + +

+

Return to the GCC Installation page + + + + + + + + + + + + + diff --git a/INSTALL/finalinstall.html b/INSTALL/finalinstall.html new file mode 100644 index 000000000..73b882093 --- /dev/null +++ b/INSTALL/finalinstall.html @@ -0,0 +1,174 @@ + + +Installing GCC: Final installation + + + + + + + + + + +

Installing GCC: Final installation

+Now that GCC has been built (and optionally tested), you can install it with +
     cd objdir && make install
+
+

We strongly recommend to install into a target directory where there is +no previous version of GCC present. Also, the GNAT runtime should not +be stripped, as this would break certain features of the debugger that +depend on this debugging information (catching Ada exceptions for +instance). + +

That step completes the installation of GCC; user level binaries can +be found in prefix/bin where prefix is the value +you specified with the --prefix to configure (or +/usr/local by default). (If you specified --bindir, +that directory will be used instead; otherwise, if you specified +--exec-prefix, exec-prefix/bin will be used.) +Headers for the C++ and Java libraries are installed in +prefix/include; libraries in libdir +(normally prefix/lib); internal parts of the compiler in +libdir/gcc and libexecdir/gcc; documentation +in info format in infodir (normally +prefix/info). + +

When installing cross-compilers, GCC's executables +are not only installed into bindir, that +is, exec-prefix/bin, but additionally into +exec-prefix/target-alias/bin, if that directory +exists. Typically, such tooldirs hold target-specific +binutils, including assembler and linker. + +

Installation into a temporary staging area or into a chroot +jail can be achieved with the command + +

     make DESTDIR=path-to-rootdir install
+
+

where path-to-rootdir is the absolute path of +a directory relative to which all installation paths will be +interpreted. Note that the directory specified by DESTDIR +need not exist yet; it will be created if necessary. + +

There is a subtle point with tooldirs and DESTDIR: +If you relocate a cross-compiler installation with +e.g. ‘DESTDIR=rootdir’, then the directory +rootdir/exec-prefix/target-alias/bin will +be filled with duplicated GCC executables only if it already exists, +it will not be created otherwise. This is regarded as a feature, +not as a bug, because it gives slightly more control to the packagers +using the DESTDIR feature. + +

You can install stripped programs and libraries with + +

     make install-strip
+
+

If you are bootstrapping a released version of GCC then please +quickly review the build status page for your release, available from +http://gcc.gnu.org/buildstat.html. +If your system is not listed for the version of GCC that you built, +send a note to +gcc@gcc.gnu.org indicating +that you successfully built and installed GCC. +Include the following information: + +

+ +

We'd also like to know if the +host/target specific installation notes +didn't include your host/target information or if that information is +incomplete or out of date. Send a note to +gcc@gcc.gnu.org detailing how the information should be changed. + +

If you find a bug, please report it following the +bug reporting guidelines. + +

If you want to print the GCC manuals, do ‘cd objdir; make +dvi’. You will need to have texi2dvi (version at least 4.7) +and TeX installed. This creates a number of .dvi files in +subdirectories of objdir; these may be converted for +printing with programs such as dvips. Alternately, by using +‘make pdf’ in place of ‘make dvi’, you can create documentation +in the form of .pdf files; this requires texi2pdf, which +is included with Texinfo version 4.8 and later. You can also +buy printed manuals from the Free Software Foundation, though such manuals may not be for the most +recent version of GCC. + +

If you would like to generate online HTML documentation, do ‘cd +objdir; make html’ and HTML will be generated for the gcc manuals in +objdir/gcc/HTML. + +

+

Return to the GCC Installation page + + + + + + + + + diff --git a/INSTALL/gfdl.html b/INSTALL/gfdl.html new file mode 100644 index 000000000..d4f387c88 --- /dev/null +++ b/INSTALL/gfdl.html @@ -0,0 +1,517 @@ + + +Installing GCC: GNU Free Documentation License + + + + + + + + + + +

Installing GCC: GNU Free Documentation License

+

Installing GCC: GNU Free Documentation License

+ +

Version 1.3, 3 November 2008
+ +
     Copyright © 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc.
+     http://fsf.org/
+     
+     Everyone is permitted to copy and distribute verbatim copies
+     of this license document, but changing it is not allowed.
+
+
    +
  1. PREAMBLE + +

    The purpose of this License is to make a manual, textbook, or other +functional and useful document free in the sense of freedom: to +assure everyone the effective freedom to copy and redistribute it, +with or without modifying it, either commercially or noncommercially. +Secondarily, this License preserves for the author and publisher a way +to get credit for their work, while not being considered responsible +for modifications made by others. + +

    This License is a kind of “copyleft”, which means that derivative +works of the document must themselves be free in the same sense. It +complements the GNU General Public License, which is a copyleft +license designed for free software. + +

    We have designed this License in order to use it for manuals for free +software, because free software needs free documentation: a free +program should come with manuals providing the same freedoms that the +software does. But this License is not limited to software manuals; +it can be used for any textual work, regardless of subject matter or +whether it is published as a printed book. We recommend this License +principally for works whose purpose is instruction or reference. + +

  2. APPLICABILITY AND DEFINITIONS + +

    This License applies to any manual or other work, in any medium, that +contains a notice placed by the copyright holder saying it can be +distributed under the terms of this License. Such a notice grants a +world-wide, royalty-free license, unlimited in duration, to use that +work under the conditions stated herein. The “Document”, below, +refers to any such manual or work. Any member of the public is a +licensee, and is addressed as “you”. You accept the license if you +copy, modify or distribute the work in a way requiring permission +under copyright law. + +

    A “Modified Version” of the Document means any work containing the +Document or a portion of it, either copied verbatim, or with +modifications and/or translated into another language. + +

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    The “Title Page” means, for a printed book, the title page itself, +plus such following pages as are needed to hold, legibly, the material +this License requires to appear in the title page. For works in +formats which do not have any title page as such, “Title Page” means +the text near the most prominent appearance of the work's title, +preceding the beginning of the body of the text. + +

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    The Document may include Warranty Disclaimers next to the notice which +states that this License applies to the Document. These Warranty +Disclaimers are considered to be included by reference in this +License, but only as regards disclaiming warranties: any other +implication that these Warranty Disclaimers may have is void and has +no effect on the meaning of this License. + +

  3. VERBATIM COPYING + +

    You may copy and distribute the Document in any medium, either +commercially or noncommercially, provided that this License, the +copyright notices, and the license notice saying this License applies +to the Document are reproduced in all copies, and that you add no other +conditions whatsoever to those of this License. You may not use +technical measures to obstruct or control the reading or further +copying of the copies you make or distribute. However, you may accept +compensation in exchange for copies. If you distribute a large enough +number of copies you must also follow the conditions in section 3. + +

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  5. MODIFICATIONS + +

    You may copy and distribute a Modified Version of the Document under +the conditions of sections 2 and 3 above, provided that you release +the Modified Version under precisely this License, with the Modified +Version filling the role of the Document, thus licensing distribution +and modification of the Modified Version to whoever possesses a copy +of it. In addition, you must do these things in the Modified Version: + +

      +
    1. Use in the Title Page (and on the covers, if any) a title distinct +from that of the Document, and from those of previous versions +(which should, if there were any, be listed in the History section +of the Document). You may use the same title as a previous version +if the original publisher of that version gives permission. + +
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    5. Add an appropriate copyright notice for your modifications +adjacent to the other copyright notices. + +
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    13. Delete any section Entitled “Endorsements”. Such a section +may not be included in the Modified Version. + +
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    + +

    If the Modified Version includes new front-matter sections or +appendices that qualify as Secondary Sections and contain no material +copied from the Document, you may at your option designate some or all +of these sections as invariant. To do this, add their titles to the +list of Invariant Sections in the Modified Version's license notice. +These titles must be distinct from any other section titles. + +

    You may add a section Entitled “Endorsements”, provided it contains +nothing but endorsements of your Modified Version by various +parties—for example, statements of peer review or that the text has +been approved by an organization as the authoritative definition of a +standard. + +

    You may add a passage of up to five words as a Front-Cover Text, and a +passage of up to 25 words as a Back-Cover Text, to the end of the list +of Cover Texts in the Modified Version. Only one passage of +Front-Cover Text and one of Back-Cover Text may be added by (or +through arrangements made by) any one entity. If the Document already +includes a cover text for the same cover, previously added by you or +by arrangement made by the same entity you are acting on behalf of, +you may not add another; but you may replace the old one, on explicit +permission from the previous publisher that added the old one. + +

    The author(s) and publisher(s) of the Document do not by this License +give permission to use their names for publicity for or to assert or +imply endorsement of any Modified Version. + +

  6. COMBINING DOCUMENTS + +

    You may combine the Document with other documents released under this +License, under the terms defined in section 4 above for modified +versions, provided that you include in the combination all of the +Invariant Sections of all of the original documents, unmodified, and +list them all as Invariant Sections of your combined work in its +license notice, and that you preserve all their Warranty Disclaimers. + +

    The combined work need only contain one copy of this License, and +multiple identical Invariant Sections may be replaced with a single +copy. If there are multiple Invariant Sections with the same name but +different contents, make the title of each such section unique by +adding at the end of it, in parentheses, the name of the original +author or publisher of that section if known, or else a unique number. +Make the same adjustment to the section titles in the list of +Invariant Sections in the license notice of the combined work. + +

    In the combination, you must combine any sections Entitled “History” +in the various original documents, forming one section Entitled +“History”; likewise combine any sections Entitled “Acknowledgements”, +and any sections Entitled “Dedications”. You must delete all +sections Entitled “Endorsements.” + +

  7. COLLECTIONS OF DOCUMENTS + +

    You may make a collection consisting of the Document and other documents +released under this License, and replace the individual copies of this +License in the various documents with a single copy that is included in +the collection, provided that you follow the rules of this License for +verbatim copying of each of the documents in all other respects. + +

    You may extract a single document from such a collection, and distribute +it individually under this License, provided you insert a copy of this +License into the extracted document, and follow this License in all +other respects regarding verbatim copying of that document. + +

  8. AGGREGATION WITH INDEPENDENT WORKS + +

    A compilation of the Document or its derivatives with other separate +and independent documents or works, in or on a volume of a storage or +distribution medium, is called an “aggregate” if the copyright +resulting from the compilation is not used to limit the legal rights +of the compilation's users beyond what the individual works permit. +When the Document is included in an aggregate, this License does not +apply to the other works in the aggregate which are not themselves +derivative works of the Document. + +

    If the Cover Text requirement of section 3 is applicable to these +copies of the Document, then if the Document is less than one half of +the entire aggregate, the Document's Cover Texts may be placed on +covers that bracket the Document within the aggregate, or the +electronic equivalent of covers if the Document is in electronic form. +Otherwise they must appear on printed covers that bracket the whole +aggregate. + +

  9. TRANSLATION + +

    Translation is considered a kind of modification, so you may +distribute translations of the Document under the terms of section 4. +Replacing Invariant Sections with translations requires special +permission from their copyright holders, but you may include +translations of some or all Invariant Sections in addition to the +original versions of these Invariant Sections. You may include a +translation of this License, and all the license notices in the +Document, and any Warranty Disclaimers, provided that you also include +the original English version of this License and the original versions +of those notices and disclaimers. In case of a disagreement between +the translation and the original version of this License or a notice +or disclaimer, the original version will prevail. + +

    If a section in the Document is Entitled “Acknowledgements”, +“Dedications”, or “History”, the requirement (section 4) to Preserve +its Title (section 1) will typically require changing the actual +title. + +

  10. TERMINATION + +

    You may not copy, modify, sublicense, or distribute the Document +except as expressly provided under this License. Any attempt +otherwise to copy, modify, sublicense, or distribute it is void, and +will automatically terminate your rights under this License. + +

    However, if you cease all violation of this License, then your license +from a particular copyright holder is reinstated (a) provisionally, +unless and until the copyright holder explicitly and finally +terminates your license, and (b) permanently, if the copyright holder +fails to notify you of the violation by some reasonable means prior to +60 days after the cessation. + +

    Moreover, your license from a particular copyright holder is +reinstated permanently if the copyright holder notifies you of the +violation by some reasonable means, this is the first time you have +received notice of violation of this License (for any work) from that +copyright holder, and you cure the violation prior to 30 days after +your receipt of the notice. + +

    Termination of your rights under this section does not terminate the +licenses of parties who have received copies or rights from you under +this License. If your rights have been terminated and not permanently +reinstated, receipt of a copy of some or all of the same material does +not give you any rights to use it. + +

  11. FUTURE REVISIONS OF THIS LICENSE + +

    The Free Software Foundation may publish new, revised versions +of the GNU Free Documentation License from time to time. Such new +versions will be similar in spirit to the present version, but may +differ in detail to address new problems or concerns. See +http://www.gnu.org/copyleft/. + +

    Each version of the License is given a distinguishing version number. +If the Document specifies that a particular numbered version of this +License “or any later version” applies to it, you have the option of +following the terms and conditions either of that specified version or +of any later version that has been published (not as a draft) by the +Free Software Foundation. If the Document does not specify a version +number of this License, you may choose any version ever published (not +as a draft) by the Free Software Foundation. If the Document +specifies that a proxy can decide which future versions of this +License can be used, that proxy's public statement of acceptance of a +version permanently authorizes you to choose that version for the +Document. + +

  12. RELICENSING + +

    “Massive Multiauthor Collaboration Site” (or “MMC Site”) means any +World Wide Web server that publishes copyrightable works and also +provides prominent facilities for anybody to edit those works. A +public wiki that anybody can edit is an example of such a server. A +“Massive Multiauthor Collaboration” (or “MMC”) contained in the +site means any set of copyrightable works thus published on the MMC +site. + +

    “CC-BY-SA” means the Creative Commons Attribution-Share Alike 3.0 +license published by Creative Commons Corporation, a not-for-profit +corporation with a principal place of business in San Francisco, +California, as well as future copyleft versions of that license +published by that same organization. + +

    “Incorporate” means to publish or republish a Document, in whole or +in part, as part of another Document. + +

    An MMC is “eligible for relicensing” if it is licensed under this +License, and if all works that were first published under this License +somewhere other than this MMC, and subsequently incorporated in whole +or in part into the MMC, (1) had no cover texts or invariant sections, +and (2) were thus incorporated prior to November 1, 2008. + +

    The operator of an MMC Site may republish an MMC contained in the site +under CC-BY-SA on the same site at any time before August 1, 2009, +provided the MMC is eligible for relicensing. + +

+ +

ADDENDUM: How to use this License for your documents

+ +

To use this License in a document you have written, include a copy of +the License in the document and put the following copyright and +license notices just after the title page: + +

       Copyright (C)  year  your name.
+       Permission is granted to copy, distribute and/or modify this document
+       under the terms of the GNU Free Documentation License, Version 1.3
+       or any later version published by the Free Software Foundation;
+       with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
+       Texts.  A copy of the license is included in the section entitled ``GNU
+       Free Documentation License''.
+
+

If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts, +replace the “with...Texts.” line with this: + +

         with the Invariant Sections being list their titles, with
+         the Front-Cover Texts being list, and with the Back-Cover Texts
+         being list.
+
+

If you have Invariant Sections without Cover Texts, or some other +combination of the three, merge those two alternatives to suit the +situation. + +

If your document contains nontrivial examples of program code, we +recommend releasing these examples in parallel under your choice of +free software license, such as the GNU General Public License, +to permit their use in free software. + + + + + +

+

Return to the GCC Installation page + + + + + diff --git a/INSTALL/index.html b/INSTALL/index.html new file mode 100644 index 000000000..9b294f2c0 --- /dev/null +++ b/INSTALL/index.html @@ -0,0 +1,125 @@ + + +Installing GCC + + + + + + + + + + +

Installing GCC

+The latest version of this document is always available at +http://gcc.gnu.org/install/. + +

This document describes the generic installation procedure for GCC as well +as detailing some target specific installation instructions. + +

GCC includes several components that previously were separate distributions +with their own installation instructions. This document supersedes all +package specific installation instructions. + +

Before starting the build/install procedure please check the +host/target specific installation notes. +We recommend you browse the entire generic installation instructions before +you proceed. + +

Lists of successful builds for released versions of GCC are +available at http://gcc.gnu.org/buildstat.html. +These lists are updated as new information becomes available. + +

The installation procedure itself is broken into five steps. + +

    +
  1. Prerequisites +
  2. Downloading the source +
  3. Configuration +
  4. Building +
  5. Testing (optional) +
  6. Final install +
+ +

Please note that GCC does not support ‘make uninstall’ and probably +won't do so in the near future as this would open a can of worms. Instead, +we suggest that you install GCC into a directory of its own and simply +remove that directory when you do not need that specific version of GCC +any longer, and, if shared libraries are installed there as well, no +more binaries exist that use them. + +

There are also some old installation instructions, +which are mostly obsolete but still contain some information which has +not yet been merged into the main part of this manual. + +

+

Return to the GCC Installation page + +

Copyright © 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, +1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, +2010 Free Software Foundation, Inc. + 

+
+
+Permission is granted to copy, distribute and/or modify this document +under the terms of the GNU Free Documentation License, Version 1.3 or +any later version published by the Free Software Foundation; with no +Invariant Sections, the Front-Cover texts being (a) (see below), and +with the Back-Cover Texts being (b) (see below). A copy of the +license is included in the section entitled “GNU Free Documentation License”. + +

(a) The FSF's Front-Cover Text is: + +

A GNU Manual + +

(b) The FSF's Back-Cover Text is: + +

You have freedom to copy and modify this GNU Manual, like GNU + software. Copies published by the Free Software Foundation raise + funds for GNU development. + + + + + + + + + + + + + + + diff --git a/INSTALL/old.html b/INSTALL/old.html new file mode 100644 index 000000000..b0e26b99a --- /dev/null +++ b/INSTALL/old.html @@ -0,0 +1,213 @@ + + +Installing GCC: Old documentation + + + + + + + + + + +

Installing GCC: Old documentation

+

Old installation documentation

+ +

Note most of this information is out of date and superseded by the +previous chapters of this manual. It is provided for historical +reference only, because of a lack of volunteers to merge it into the +main manual. + +

Here is the procedure for installing GCC on a GNU or Unix system. + +

    +
  1. If you have chosen a configuration for GCC which requires other GNU +tools (such as GAS or the GNU linker) instead of the standard system +tools, install the required tools in the build directory under the names +as, ld or whatever is appropriate. + +

    Alternatively, you can do subsequent compilation using a value of the +PATH environment variable such that the necessary GNU tools come +before the standard system tools. + +

  2. Specify the host, build and target machine configurations. You do this +when you run the configure script. + +

    The build machine is the system which you are using, the +host machine is the system where you want to run the resulting +compiler (normally the build machine), and the target machine is +the system for which you want the compiler to generate code. + +

    If you are building a compiler to produce code for the machine it runs +on (a native compiler), you normally do not need to specify any operands +to configure; it will try to guess the type of machine you are on +and use that as the build, host and target machines. So you don't need +to specify a configuration when building a native compiler unless +configure cannot figure out what your configuration is or guesses +wrong. + +

    In those cases, specify the build machine's configuration name +with the --host option; the host and target will default to be +the same as the host machine. + +

    Here is an example: + + 

              ./configure --host=sparc-sun-sunos4.1
+
    +

    A configuration name may be canonical or it may be more or less +abbreviated. + +

    A canonical configuration name has three parts, separated by dashes. +It looks like this: ‘cpu-company-system’. +(The three parts may themselves contain dashes; configure +can figure out which dashes serve which purpose.) For example, +‘m68k-sun-sunos4.1’ specifies a Sun 3. + +

    You can also replace parts of the configuration by nicknames or aliases. +For example, ‘sun3’ stands for ‘m68k-sun’, so +‘sun3-sunos4.1’ is another way to specify a Sun 3. + +

    You can specify a version number after any of the system types, and some +of the CPU types. In most cases, the version is irrelevant, and will be +ignored. So you might as well specify the version if you know it. + +

    See Configurations, for a list of supported configuration names and +notes on many of the configurations. You should check the notes in that +section before proceeding any further with the installation of GCC. + +

+ +

Configurations Supported by GCC

+Here are the possible CPU types: + +
+ +1750a, a29k, alpha, arm, avr, cn, clipper, dsp16xx, elxsi, fr30, h8300, +hppa1.0, hppa1.1, i370, i386, i486, i586, i686, i786, i860, i960, ip2k, m32r, +m68000, m68k, m6811, m6812, m88k, mcore, mips, mipsel, mips64, mips64el, +mn10200, mn10300, ns32k, pdp11, powerpc, powerpcle, romp, rs6000, sh, sparc, +sparclite, sparc64, v850, vax, we32k. +
+ +

Here are the recognized company names. As you can see, customary +abbreviations are used rather than the longer official names. + + +

+acorn, alliant, altos, apollo, apple, att, bull, +cbm, convergent, convex, crds, dec, dg, dolphin, +elxsi, encore, harris, hitachi, hp, ibm, intergraph, isi, +mips, motorola, ncr, next, ns, omron, plexus, +sequent, sgi, sony, sun, tti, unicom, wrs. +
+ +

The company name is meaningful only to disambiguate when the rest of +the information supplied is insufficient. You can omit it, writing +just ‘cpu-system’, if it is not needed. For example, +‘vax-ultrix4.2’ is equivalent to ‘vax-dec-ultrix4.2’. + +

Here is a list of system types: + +

+386bsd, aix, acis, amigaos, aos, aout, aux, bosx, bsd, clix, coff, ctix, cxux, +dgux, dynix, ebmon, ecoff, elf, esix, freebsd, hms, genix, gnu, linux, +linux-gnu, hiux, hpux, iris, irix, isc, luna, lynxos, mach, minix, msdos, mvs, +netbsd, newsos, nindy, ns, osf, osfrose, ptx, riscix, riscos, rtu, sco, sim, +solaris, sunos, sym, sysv, udi, ultrix, unicos, uniplus, unos, vms, vsta, +vxworks, winnt, xenix. +
+ +

You can omit the system type; then configure guesses the +operating system from the CPU and company. + +

You can add a version number to the system type; this may or may not +make a difference. For example, you can write ‘bsd4.3’ or +‘bsd4.4’ to distinguish versions of BSD. In practice, the version +number is most needed for ‘sysv3’ and ‘sysv4’, which are often +treated differently. + +

‘linux-gnu’ is the canonical name for the GNU/Linux target; however +GCC will also accept ‘linux’. The version of the kernel in use is +not relevant on these systems. A suffix such as ‘libc1’ or ‘aout’ +distinguishes major versions of the C library; all of the suffixed versions +are obsolete. + +

If you specify an impossible combination such as ‘i860-dg-vms’, +then you may get an error message from configure, or it may +ignore part of the information and do the best it can with the rest. +configure always prints the canonical name for the alternative +that it used. GCC does not support all possible alternatives. + +

Often a particular model of machine has a name. Many machine names are +recognized as aliases for CPU/company combinations. Thus, the machine +name ‘sun3’, mentioned above, is an alias for ‘m68k-sun’. +Sometimes we accept a company name as a machine name, when the name is +popularly used for a particular machine. Here is a table of the known +machine names: + +

+3300, 3b1, 3bn, 7300, altos3068, altos, +apollo68, att-7300, balance, +convex-cn, crds, decstation-3100, +decstation, delta, encore, +fx2800, gmicro, hp7nn, hp8nn, +hp9k2nn, hp9k3nn, hp9k7nn, +hp9k8nn, iris4d, iris, isi68, +m3230, magnum, merlin, miniframe, +mmax, news-3600, news800, news, next, +pbd, pc532, pmax, powerpc, powerpcle, ps2, risc-news, +rtpc, sun2, sun386i, sun386, sun3, +sun4, symmetry, tower-32, tower. +
+ +

Remember that a machine name specifies both the cpu type and the company +name. +If you want to install your own homemade configuration files, you can +use ‘local’ as the company name to access them. If you use +configuration ‘cpu-local’, the configuration name +without the cpu prefix +is used to form the configuration file names. + +

Thus, if you specify ‘m68k-local’, configuration uses +files m68k.md, local.h, m68k.c, +xm-local.h, t-local, and x-local, all in the +directory config/m68k. +

+

Return to the GCC Installation page + + + + + + diff --git a/INSTALL/prerequisites.html b/INSTALL/prerequisites.html new file mode 100644 index 000000000..f5d374626 --- /dev/null +++ b/INSTALL/prerequisites.html @@ -0,0 +1,297 @@ + + +Prerequisites for GCC + + + + + + + + + + +

Prerequisites for GCC

+ +GCC requires that various tools and packages be available for use in the +build procedure. Modifying GCC sources requires additional tools +described below. + +

Tools/packages necessary for building GCC

+ +
+
ISO C90 compiler
Necessary to bootstrap GCC, although versions of GCC prior +to 3.4 also allow bootstrapping with a traditional (K&R) C compiler. + +

To build all languages in a cross-compiler or other configuration where +3-stage bootstrap is not performed, you need to start with an existing +GCC binary (version 2.95 or later) because source code for language +frontends other than C might use GCC extensions. + +

GNAT
+In order to build the Ada compiler (GNAT) you must already have GNAT +installed because portions of the Ada frontend are written in Ada (with +GNAT extensions.) Refer to the Ada installation instructions for more +specific information. + +
A “working” POSIX compatible shell, or GNU bash
+Necessary when running configure because some +/bin/sh shells have bugs and may crash when configuring the +target libraries. In other cases, /bin/sh or ksh +have disastrous corner-case performance problems. This +can cause target configure runs to literally take days to +complete in some cases. + +

So on some platforms /bin/ksh is sufficient, on others it +isn't. See the host/target specific instructions for your platform, or +use bash to be sure. Then set CONFIG_SHELL in your +environment to your “good” shell prior to running +configure/make. + +

zsh is not a fully compliant POSIX shell and will not +work when configuring GCC. + +

A POSIX or SVR4 awk
+Necessary for creating some of the generated source files for GCC. +If in doubt, use a recent GNU awk version, as some of the older ones +are broken. GNU awk version 3.1.5 is known to work. + +
GNU binutils
+Necessary in some circumstances, optional in others. See the +host/target specific instructions for your platform for the exact +requirements. + +
gzip version 1.2.4 (or later) or
bzip2 version 1.0.2 (or later)
+Necessary to uncompress GCC tar files when source code is +obtained via FTP mirror sites. + +
GNU make version 3.80 (or later)
+You must have GNU make installed to build GCC. + +
GNU tar version 1.14 (or later)
+Necessary (only on some platforms) to untar the source code. Many +systems' tar programs will also work, only try GNU +tar if you have problems. + +
Perl version 5.6.1 (or later)
+Necessary when targetting Darwin, building ‘libstdc++’, +and not using --disable-symvers. +Necessary when targetting Solaris 2 with Sun ld and not using +--disable-symvers. A helper +script needs ‘Glob.pm’, which is missing from perl 5.005 +included in Solaris 8. The bundled perl in Solaris 9 and up +works. + +

Necessary when regenerating Makefile dependencies in libiberty. +Necessary when regenerating libiberty/functions.texi. +Necessary when generating manpages from Texinfo manuals. +Used by various scripts to generate some files included in SVN (mainly +Unicode-related and rarely changing) from source tables. + +

jar, or InfoZIP (zip and unzip)
+Necessary to build libgcj, the GCJ runtime. + +
+ +

Several support libraries are necessary to build GCC, some are required, +others optional. While any sufficiently new version of required tools +usually work, library requirements are generally stricter. Newer +versions may work in some cases, but it's safer to use the exact +versions documented. We appreciate bug reports about problems with +newer versions, though. + +

+
GNU Multiple Precision Library (GMP) version 4.3.2 (or later)
+Necessary to build GCC. If you do not have it installed in your +library search path, you will have to configure with the +--with-gmp configure option. See also --with-gmp-lib +and --with-gmp-include. Alternatively, if a GMP source +distribution is found in a subdirectory of your GCC sources named +gmp, it will be built together with GCC. + +
MPFR Library version 2.4.2 (or later)
+Necessary to build GCC. It can be downloaded from +http://www.mpfr.org/. The --with-mpfr configure +option should be used if your MPFR Library is not installed in your +default library search path. See also --with-mpfr-lib and +--with-mpfr-include. Alternatively, if a MPFR source +distribution is found in a subdirectory of your GCC sources named +mpfr, it will be built together with GCC. + +
MPC Library version 0.8.1 (or later)
+Necessary to build GCC. It can be downloaded from +http://www.multiprecision.org/. The --with-mpc +configure option should be used if your MPC Library is not installed +in your default library search path. See also --with-mpc-lib +and --with-mpc-include. Alternatively, if an MPC source +distribution is found in a subdirectory of your GCC sources named +mpc, it will be built together with GCC. + +
Parma Polyhedra Library (PPL) version 0.11
+Necessary to build GCC with the Graphite loop optimizations. +It can be downloaded from http://www.cs.unipr.it/ppl/Download/. + +

The --with-ppl configure option should be used if PPL is not +installed in your default library search path. + +

CLooG-PPL version 0.15 or CLooG 0.16
+Necessary to build GCC with the Graphite loop optimizations. There +are two versions available. CLooG-PPL 0.15 as well as CLooG 0.16. +The former is the default right now. It can be downloaded from +ftp://gcc.gnu.org/pub/gcc/infrastructure/ as +cloog-ppl-0.15.tar.gz. + +

CLooG 0.16 support is still in testing stage, but will be the +default in future GCC releases. It is also available at +ftp://gcc.gnu.org/pub/gcc/infrastructure/ as +cloog-0.16.1.tar.gz. To use it add the additional configure +option --enable-cloog-backend=isl. Even if CLooG 0.16 +does not use PPL, PPL is still required for Graphite. + +

In both cases --with-cloog configure option should be used +if CLooG is not installed in your default library search path. + +

+ +

Tools/packages necessary for modifying GCC

+ +
+
autoconf version 2.64
GNU m4 version 1.4.6 (or later)
+Necessary when modifying configure.ac, aclocal.m4, etc. +to regenerate configure and config.in files. + +
automake version 1.11.1
+Necessary when modifying a Makefile.am file to regenerate its +associated Makefile.in. + +

Much of GCC does not use automake, so directly edit the Makefile.in +file. Specifically this applies to the gcc, intl, +libcpp, libiberty, libobjc directories as well +as any of their subdirectories. + +

For directories that use automake, GCC requires the latest release in +the 1.11 series, which is currently 1.11.1. When regenerating a directory +to a newer version, please update all the directories using an older 1.11 +to the latest released version. + +

gettext version 0.14.5 (or later)
+Needed to regenerate gcc.pot. + +
gperf version 2.7.2 (or later)
+Necessary when modifying gperf input files, e.g. +gcc/cp/cfns.gperf to regenerate its associated header file, e.g. +gcc/cp/cfns.h. + +
DejaGnu 1.4.4
Expect
Tcl
+Necessary to run the GCC testsuite; see the section on testing for details. + +
autogen version 5.5.4 (or later) and
guile version 1.4.1 (or later)
+Necessary to regenerate fixinc/fixincl.x from +fixinc/inclhack.def and fixinc/*.tpl. + +

Necessary to run ‘make check’ for fixinc. + +

Necessary to regenerate the top level Makefile.in file from +Makefile.tpl and Makefile.def. + +

Flex version 2.5.4 (or later)
+Necessary when modifying *.l files. + +

Necessary to build GCC during development because the generated output +files are not included in the SVN repository. They are included in +releases. + +

Texinfo version 4.7 (or later)
+Necessary for running makeinfo when modifying *.texi +files to test your changes. + +

Necessary for running make dvi or make pdf to +create printable documentation in DVI or PDF format. Texinfo version +4.8 or later is required for make pdf. + +

Necessary to build GCC documentation during development because the +generated output files are not included in the SVN repository. They are +included in releases. + +

TeX (any working version)
+Necessary for running texi2dvi and texi2pdf, which +are used when running make dvi or make pdf to create +DVI or PDF files, respectively. + +
SVN (any version)
SSH (any version)
+Necessary to access the SVN repository. Public releases and weekly +snapshots of the development sources are also available via FTP. + +
GNU diffutils version 2.7 (or later)
+Useful when submitting patches for the GCC source code. + +
patch version 2.5.4 (or later)
+Necessary when applying patches, created with diff, to one's +own sources. + +
ecj1
gjavah
+If you wish to modify .java files in libjava, you will need to +configure with --enable-java-maintainer-mode, and you will need +to have executables named ecj1 and gjavah in your path. +The ecj1 executable should run the Eclipse Java compiler via +the GCC-specific entry point. You can download a suitable jar from +ftp://sourceware.org/pub/java/, or by running the script +contrib/download_ecj. + +
antlr.jar version 2.7.1 (or later)
antlr binary
+If you wish to build the gjdoc binary in libjava, you will +need to have an antlr.jar library available. The library is +searched in system locations but can be configured with +--with-antlr-jar= instead. When configuring with +--enable-java-maintainer-mode, you will need to have one of +the executables named cantlr, runantlr or +antlr in your path. + +
+ +

+

Return to the GCC Installation page + + + + + + + + + + + + + + diff --git a/INSTALL/specific.html b/INSTALL/specific.html new file mode 100644 index 000000000..11c9bccdd --- /dev/null +++ b/INSTALL/specific.html @@ -0,0 +1,1561 @@ + + +Host/Target specific installation notes for GCC + + + + + + + + + + +

Host/Target specific installation notes for GCC

+ +Please read this document carefully before installing the +GNU Compiler Collection on your machine. + +

Note that this list of install notes is not a list of supported +hosts or targets. Not all supported hosts and targets are listed +here, only the ones that require host-specific or target-specific +information are. + +

+ + + +

+

+ +

alpha*-*-*

+ +

This section contains general configuration information for all +alpha-based platforms using ELF (in particular, ignore this section for +DEC OSF/1, Digital UNIX and Tru64 UNIX). In addition to reading this +section, please read all other sections that match your target. + +

We require binutils 2.11.2 or newer. +Previous binutils releases had a number of problems with DWARF 2 +debugging information, not the least of which is incorrect linking of +shared libraries. + +

+ +

alpha*-dec-osf5.1

+ +

Systems using processors that implement the DEC Alpha architecture and +are running the DEC/Compaq/HP Unix (DEC OSF/1, Digital UNIX, or Compaq/HP +Tru64 UNIX) operating system, for example the DEC Alpha AXP systems. + +

As of GCC 3.2, versions before alpha*-dec-osf4 are no longer +supported. (These are the versions which identify themselves as DEC +OSF/1.) As of GCC 4.6, support for Tru64 UNIX V4.0 and V5.0 has been +removed. + +

On Tru64 UNIX, virtual memory exhausted bootstrap failures +may be fixed by reconfiguring Kernel Virtual Memory and Swap parameters +per the /usr/sbin/sys_check Tuning Suggestions, +or applying the patch in +http://gcc.gnu.org/ml/gcc/2002-08/msg00822.html. Depending on +the OS version used, you need a data segment size between 512 MB and +1 GB, so simply use ulimit -Sd unlimited. + +

As of GNU binutils 2.21, neither GNU as nor GNU ld +are supported on Tru64 UNIX, so you must not configure GCC with +--with-gnu-as or --with-gnu-ld. + +

GCC writes a ‘.verstamp’ directive to the assembler output file +unless it is built as a cross-compiler. It gets the version to use from +the system header file /usr/include/stamp.h. If you install a +new version of Tru64 UNIX, you should rebuild GCC to pick up the new version +stamp. + +

GCC now supports both the native (ECOFF) debugging format used by DBX +and GDB and an encapsulated STABS format for use only with GDB. See the +discussion of the --with-stabs option of configure above +for more information on these formats and how to select them. + + +

There is a bug in DEC's assembler that produces incorrect line numbers +for ECOFF format when the ‘.align’ directive is used. To work +around this problem, GCC will not emit such alignment directives +while writing ECOFF format debugging information even if optimization is +being performed. Unfortunately, this has the very undesirable +side-effect that code addresses when -O is specified are +different depending on whether or not -g is also specified. + +

To avoid this behavior, specify -gstabs+ and use GDB instead of +DBX. DEC is now aware of this problem with the assembler and hopes to +provide a fix shortly. + + +

+ +

arc-*-elf

+ +

Argonaut ARC processor. +This configuration is intended for embedded systems. + +

+ +

arm-*-elf

+ +

ARM-family processors. Subtargets that use the ELF object format +require GNU binutils 2.13 or newer. Such subtargets include: +arm-*-freebsd, arm-*-netbsdelf, arm-*-*linux +and arm-*-rtems. + +

+ +

avr

+ +

ATMEL AVR-family micro controllers. These are used in embedded +applications. There are no standard Unix configurations. +See “AVR Options” in the main manual +for the list of supported MCU types. + +

Use ‘configure --target=avr --enable-languages="c"’ to configure GCC. + +

Further installation notes and other useful information about AVR tools +can also be obtained from: + +

+ +

We strongly recommend using binutils 2.13 or newer. + +

The following error: +

     Error: register required
+
+

indicates that you should upgrade to a newer version of the binutils. + +

+ +

Blackfin

+ +

The Blackfin processor, an Analog Devices DSP. +See “Blackfin Options” in the main manual + +

More information, and a version of binutils with support for this processor, +is available at http://blackfin.uclinux.org + +

+ +

CRIS

+ +

CRIS is the CPU architecture in Axis Communications ETRAX system-on-a-chip +series. These are used in embedded applications. + +

See “CRIS Options” in the main manual +for a list of CRIS-specific options. + +

There are a few different CRIS targets: +

+
cris-axis-elf
Mainly for monolithic embedded systems. Includes a multilib for the +‘v10’ core used in ‘ETRAX 100 LX’. +
cris-axis-linux-gnu
A GNU/Linux port for the CRIS architecture, currently targeting +‘ETRAX 100 LX’ by default. +
+ +

For cris-axis-elf you need binutils 2.11 +or newer. For cris-axis-linux-gnu you need binutils 2.12 or newer. + +

Pre-packaged tools can be obtained from +ftp://ftp.axis.com/pub/axis/tools/cris/compiler-kit/. More +information about this platform is available at +http://developer.axis.com/. + +

+ +

CRX

+ +

The CRX CompactRISC architecture is a low-power 32-bit architecture with +fast context switching and architectural extensibility features. + +

See “CRX Options” in the main manual for a list of CRX-specific options. + +

Use ‘configure --target=crx-elf --enable-languages=c,c++’ to configure +GCC for building a CRX cross-compiler. The option ‘--target=crx-elf’ +is also used to build the ‘newlib’ C library for CRX. + +

It is also possible to build libstdc++-v3 for the CRX architecture. This +needs to be done in a separate step with the following configure settings: + +

     gcc/libstdc++-v3/configure --host=crx-elf --with-newlib \
+         --enable-sjlj-exceptions --enable-cxx-flags='-fexceptions -frtti'
+
+

+ +

DOS

+ +

Please have a look at the binaries page. + +

You cannot install GCC by itself on MSDOS; it will not compile under +any MSDOS compiler except itself. You need to get the complete +compilation package DJGPP, which includes binaries as well as sources, +and includes all the necessary compilation tools and libraries. + +

+ +

*-*-freebsd*

+ +

Support for FreeBSD 1 was discontinued in GCC 3.2. Support for +FreeBSD 2 (and any mutant a.out variants of FreeBSD 3) was +discontinued in GCC 4.0. + +

In order to better utilize FreeBSD base system functionality and match +the configuration of the system compiler, GCC 4.5 and above as well as +GCC 4.4 past 2010-06-20 leverage SSP support in libc (which is present +on FreeBSD 7 or later) and the use of __cxa_atexit by default +(on FreeBSD 6 or later). The use of dl_iterate_phdr inside +libgcc_s.so.1 and boehm-gc (on FreeBSD 7 or later) is enabled +by GCC 4.5 and above. + +

We support FreeBSD using the ELF file format with DWARF 2 debugging +for all CPU architectures. You may use -gstabs instead of +-g, if you really want the old debugging format. There are +no known issues with mixing object files and libraries with different +debugging formats. Otherwise, this release of GCC should now match +more of the configuration used in the stock FreeBSD configuration of +GCC. In particular, --enable-threads is now configured by +default. However, as a general user, do not attempt to replace the +system compiler with this release. Known to bootstrap and check with +good results on FreeBSD 7.2-STABLE. In the past, known to bootstrap +and check with good results on FreeBSD 3.0, 3.4, 4.0, 4.2, 4.3, 4.4, +4.5, 4.8, 4.9 and 5-CURRENT. + +

The version of binutils installed in /usr/bin probably works +with this release of GCC. Bootstrapping against the latest GNU +binutils and/or the version found in /usr/ports/devel/binutils has +been known to enable additional features and improve overall testsuite +results. However, it is currently known that boehm-gc (which itself +is required for java) may not configure properly on FreeBSD prior to +the FreeBSD 7.0 release with GNU binutils after 2.16.1. + +

+ +

h8300-hms

+ +

Renesas H8/300 series of processors. + +

Please have a look at the binaries page. + +

The calling convention and structure layout has changed in release 2.6. +All code must be recompiled. The calling convention now passes the +first three arguments in function calls in registers. Structures are no +longer a multiple of 2 bytes. + +

+ +

hppa*-hp-hpux*

+ +

Support for HP-UX version 9 and older was discontinued in GCC 3.4. + +

We require using gas/binutils on all hppa platforms. Version 2.19 or +later is recommended. + +

It may be helpful to configure GCC with the +--with-gnu-as and +--with-as=... options to ensure that GCC can find GAS. + +

The HP assembler should not be used with GCC. It is rarely tested and may +not work. It shouldn't be used with any languages other than C due to its +many limitations. + +

Specifically, -g does not work (HP-UX uses a peculiar debugging +format which GCC does not know about). It also inserts timestamps +into each object file it creates, causing the 3-stage comparison test to +fail during a bootstrap. You should be able to continue by saying +‘make all-host all-target’ after getting the failure from ‘make’. + +

Various GCC features are not supported. For example, it does not support weak +symbols or alias definitions. As a result, explicit template instantiations +are required when using C++. This makes it difficult if not impossible to +build many C++ applications. + +

There are two default scheduling models for instructions. These are +PROCESSOR_7100LC and PROCESSOR_8000. They are selected from the pa-risc +architecture specified for the target machine when configuring. +PROCESSOR_8000 is the default. PROCESSOR_7100LC is selected when +the target is a ‘hppa1*’ machine. + +

The PROCESSOR_8000 model is not well suited to older processors. Thus, +it is important to completely specify the machine architecture when +configuring if you want a model other than PROCESSOR_8000. The macro +TARGET_SCHED_DEFAULT can be defined in BOOT_CFLAGS if a different +default scheduling model is desired. + +

As of GCC 4.0, GCC uses the UNIX 95 namespace for HP-UX 10.10 +through 11.00, and the UNIX 98 namespace for HP-UX 11.11 and later. +This namespace change might cause problems when bootstrapping with +an earlier version of GCC or the HP compiler as essentially the same +namespace is required for an entire build. This problem can be avoided +in a number of ways. With HP cc, UNIX_STD can be set to ‘95’ +or ‘98’. Another way is to add an appropriate set of predefines +to CC. The description for the munix= option contains +a list of the predefines used with each standard. + +

More specific information to ‘hppa*-hp-hpux*’ targets follows. + +

+ +

hppa*-hp-hpux10

+ +

For hpux10.20, we highly recommend you pick up the latest sed patch +PHCO_19798 from HP. + +

The C++ ABI has changed incompatibly in GCC 4.0. COMDAT subspaces are +used for one-only code and data. This resolves many of the previous +problems in using C++ on this target. However, the ABI is not compatible +with the one implemented under HP-UX 11 using secondary definitions. + +

+ +

hppa*-hp-hpux11

+ +

GCC 3.0 and up support HP-UX 11. GCC 2.95.x is not supported and cannot +be used to compile GCC 3.0 and up. + +

The libffi and libjava libraries haven't been ported to 64-bit HP-UX and don't build. + +

Refer to binaries for information about obtaining +precompiled GCC binaries for HP-UX. Precompiled binaries must be obtained +to build the Ada language as it can't be bootstrapped using C. Ada is +only available for the 32-bit PA-RISC runtime. + +

Starting with GCC 3.4 an ISO C compiler is required to bootstrap. The +bundled compiler supports only traditional C; you will need either HP's +unbundled compiler, or a binary distribution of GCC. + +

It is possible to build GCC 3.3 starting with the bundled HP compiler, +but the process requires several steps. GCC 3.3 can then be used to +build later versions. The fastjar program contains ISO C code and +can't be built with the HP bundled compiler. This problem can be +avoided by not building the Java language. For example, use the +--enable-languages="c,c++,f77,objc" option in your configure +command. + +

There are several possible approaches to building the distribution. +Binutils can be built first using the HP tools. Then, the GCC +distribution can be built. The second approach is to build GCC +first using the HP tools, then build binutils, then rebuild GCC. +There have been problems with various binary distributions, so it +is best not to start from a binary distribution. + +

On 64-bit capable systems, there are two distinct targets. Different +installation prefixes must be used if both are to be installed on +the same system. The ‘hppa[1-2]*-hp-hpux11*’ target generates code +for the 32-bit PA-RISC runtime architecture and uses the HP linker. +The ‘hppa64-hp-hpux11*’ target generates 64-bit code for the +PA-RISC 2.0 architecture. + +

The script config.guess now selects the target type based on the compiler +detected during configuration. You must define PATH or CC so +that configure finds an appropriate compiler for the initial bootstrap. +When CC is used, the definition should contain the options that are +needed whenever CC is used. + +

Specifically, options that determine the runtime architecture must be +in CC to correctly select the target for the build. It is also +convenient to place many other compiler options in CC. For example, +CC="cc -Ac +DA2.0W -Wp,-H16376 -D_CLASSIC_TYPES -D_HPUX_SOURCE" +can be used to bootstrap the GCC 3.3 branch with the HP compiler in +64-bit K&R/bundled mode. The +DA2.0W option will result in +the automatic selection of the ‘hppa64-hp-hpux11*’ target. The +macro definition table of cpp needs to be increased for a successful +build with the HP compiler. _CLASSIC_TYPES and _HPUX_SOURCE need to +be defined when building with the bundled compiler, or when using the +-Ac option. These defines aren't necessary with -Ae. + +

It is best to explicitly configure the ‘hppa64-hp-hpux11*’ target +with the --with-ld=... option. This overrides the standard +search for ld. The two linkers supported on this target require different +commands. The default linker is determined during configuration. As a +result, it's not possible to switch linkers in the middle of a GCC build. +This has been reported to sometimes occur in unified builds of binutils +and GCC. + +

A recent linker patch must be installed for the correct operation of +GCC 3.3 and later. PHSS_26559 and PHSS_24304 are the +oldest linker patches that are known to work. They are for HP-UX +11.00 and 11.11, respectively. PHSS_24303, the companion to +PHSS_24304, might be usable but it hasn't been tested. These +patches have been superseded. Consult the HP patch database to obtain +the currently recommended linker patch for your system. + +

The patches are necessary for the support of weak symbols on the +32-bit port, and for the running of initializers and finalizers. Weak +symbols are implemented using SOM secondary definition symbols. Prior +to HP-UX 11, there are bugs in the linker support for secondary symbols. +The patches correct a problem of linker core dumps creating shared +libraries containing secondary symbols, as well as various other +linking issues involving secondary symbols. + +

GCC 3.3 uses the ELF DT_INIT_ARRAY and DT_FINI_ARRAY capabilities to +run initializers and finalizers on the 64-bit port. The 32-bit port +uses the linker +init and +fini options for the same +purpose. The patches correct various problems with the +init/+fini +options, including program core dumps. Binutils 2.14 corrects a +problem on the 64-bit port resulting from HP's non-standard use of +the .init and .fini sections for array initializers and finalizers. + +

Although the HP and GNU linkers are both supported for the +‘hppa64-hp-hpux11*’ target, it is strongly recommended that the +HP linker be used for link editing on this target. + +

At this time, the GNU linker does not support the creation of long +branch stubs. As a result, it can't successfully link binaries +containing branch offsets larger than 8 megabytes. In addition, +there are problems linking shared libraries, linking executables +with -static, and with dwarf2 unwind and exception support. +It also doesn't provide stubs for internal calls to global functions +in shared libraries, so these calls can't be overloaded. + +

The HP dynamic loader does not support GNU symbol versioning, so symbol +versioning is not supported. It may be necessary to disable symbol +versioning with --disable-symvers when using GNU ld. + +

POSIX threads are the default. The optional DCE thread library is not +supported, so --enable-threads=dce does not work. + +

+ +

*-*-linux-gnu

+ +

Versions of libstdc++-v3 starting with 3.2.1 require bug fixes present +in glibc 2.2.5 and later. More information is available in the +libstdc++-v3 documentation. + +

+ +

i?86-*-linux*

+ +

As of GCC 3.3, binutils 2.13.1 or later is required for this platform. +See bug 10877 for more information. + +

If you receive Signal 11 errors when building on GNU/Linux, then it is +possible you have a hardware problem. Further information on this can be +found on www.bitwizard.nl. + +

+ +

i?86-*-solaris2.[89]

+ +

The Sun assembler in Solaris 8 and 9 has several bugs and limitations. +While GCC works around them, several features are missing, so it is + +recommended to use the GNU assembler instead. There is no bundled +version, but the current version, from GNU binutils 2.21, is known to +work. + +

Solaris 2/x86 doesn't support the execution of SSE/SSE2 instructions +before Solaris 9 4/04, even if the CPU supports them. Programs will +receive SIGILL if they try. The fix is available both in +Solaris 9 Update 6 and kernel patch 112234-12 or newer. There is no +corresponding patch for Solaris 8. To avoid this problem, +-march defaults to ‘pentiumpro’ on Solaris 8 and 9. If +you have the patch installed, you can configure GCC with an appropriate +--with-arch option, but need GNU as for SSE2 support. + +

+ +

i?86-*-solaris2.10

+ +

Use this for Solaris 10 or later on x86 and x86-64 systems. This +configuration is supported by GCC 4.0 and later versions only. Unlike +‘sparcv9-sun-solaris2*’, there is no corresponding 64-bit +configuration like ‘amd64-*-solaris2*’ or ‘x86_64-*-solaris2*’. + + +

It is recommended that you configure GCC to use the GNU assembler, in +/usr/sfw/bin/gas. The versions included in Solaris 10, from GNU +binutils 2.15, and Solaris 11, from GNU binutils 2.19, work fine, +although the current version, from GNU binutils +2.21, is known to work, too. Recent versions of the Sun assembler in +/usr/ccs/bin/as work almost as well, though. + + +

For linking, the Sun linker, is preferred. If you want to use the GNU +linker instead, which is available in /usr/sfw/bin/gld, note that +due to a packaging bug the version in Solaris 10, from GNU binutils +2.15, cannot be used, while the version in Solaris 11, from GNU binutils +2.19, works, as does the latest version, from GNU binutils 2.21. + +

To use GNU as, configure with the options +--with-gnu-as --with-as=/usr/sfw/bin/gas. It may be necessary +to configure with --without-gnu-ld --with-ld=/usr/ccs/bin/ld to +guarantee use of Sun ld. + + +

+ +

ia64-*-linux

+ +

IA-64 processor (also known as IPF, or Itanium Processor Family) +running GNU/Linux. + +

If you are using the installed system libunwind library with +--with-system-libunwind, then you must use libunwind 0.98 or +later. + +

None of the following versions of GCC has an ABI that is compatible +with any of the other versions in this list, with the exception that +Red Hat 2.96 and Trillian 000171 are compatible with each other: +3.1, 3.0.2, 3.0.1, 3.0, Red Hat 2.96, and Trillian 000717. +This primarily affects C++ programs and programs that create shared libraries. +GCC 3.1 or later is recommended for compiling linux, the kernel. +As of version 3.1 GCC is believed to be fully ABI compliant, and hence no +more major ABI changes are expected. + +

+ +

ia64-*-hpux*

+ +

Building GCC on this target requires the GNU Assembler. The bundled HP +assembler will not work. To prevent GCC from using the wrong assembler, +the option --with-gnu-as may be necessary. + +

The GCC libunwind library has not been ported to HPUX. This means that for +GCC versions 3.2.3 and earlier, --enable-libunwind-exceptions +is required to build GCC. For GCC 3.3 and later, this is the default. +For gcc 3.4.3 and later, --enable-libunwind-exceptions is +removed and the system libunwind library will always be used. + +

+ + +

*-ibm-aix*

+ +

Support for AIX version 3 and older was discontinued in GCC 3.4. +Support for AIX version 4.2 and older was discontinued in GCC 4.5. + +

“out of memory” bootstrap failures may indicate a problem with +process resource limits (ulimit). Hard limits are configured in the +/etc/security/limits system configuration file. + +

GCC can bootstrap with recent versions of IBM XLC, but bootstrapping +with an earlier release of GCC is recommended. Bootstrapping with XLC +requires a larger data segment, which can be enabled through the +LDR_CNTRL environment variable, e.g., + +

     % LDR_CNTRL=MAXDATA=0x50000000
+     % export LDR_CNTRL
+
+

One can start with a pre-compiled version of GCC to build from +sources. One may delete GCC's “fixed” header files when starting +with a version of GCC built for an earlier release of AIX. + +

To speed up the configuration phases of bootstrapping and installing GCC, +one may use GNU Bash instead of AIX /bin/sh, e.g., + +

     % CONFIG_SHELL=/opt/freeware/bin/bash
+     % export CONFIG_SHELL
+
+

and then proceed as described in the build instructions, where we strongly recommend specifying an absolute path +to invoke srcdir/configure. + +

Because GCC on AIX is built as a 32-bit executable by default, +(although it can generate 64-bit programs) the GMP and MPFR libraries +required by gfortran must be 32-bit libraries. Building GMP and MPFR +as static archive libraries works better than shared libraries. + +

Errors involving alloca when building GCC generally are due +to an incorrect definition of CC in the Makefile or mixing files +compiled with the native C compiler and GCC. During the stage1 phase of +the build, the native AIX compiler must be invoked as cc +(not xlc). Once configure has been informed of +xlc, one needs to use ‘make distclean’ to remove the +configure cache files and ensure that CC environment variable +does not provide a definition that will confuse configure. +If this error occurs during stage2 or later, then the problem most likely +is the version of Make (see above). + +

The native as and ld are recommended for bootstrapping +on AIX. The GNU Assembler, GNU Linker, and GNU Binutils version 2.20 +is required to bootstrap on AIX 5. The native AIX tools do +interoperate with GCC. + +

Building libstdc++.a requires a fix for an AIX Assembler bug +APAR IY26685 (AIX 4.3) or APAR IY25528 (AIX 5.1). It also requires a +fix for another AIX Assembler bug and a co-dependent AIX Archiver fix +referenced as APAR IY53606 (AIX 5.2) or as APAR IY54774 (AIX 5.1) + +

‘libstdc++’ in GCC 3.4 increments the major version number of the +shared object and GCC installation places the libstdc++.a +shared library in a common location which will overwrite the and GCC +3.3 version of the shared library. Applications either need to be +re-linked against the new shared library or the GCC 3.1 and GCC 3.3 +versions of the ‘libstdc++’ shared object needs to be available +to the AIX runtime loader. The GCC 3.1 ‘libstdc++.so.4’, if +present, and GCC 3.3 ‘libstdc++.so.5’ shared objects can be +installed for runtime dynamic loading using the following steps to set +the ‘F_LOADONLY’ flag in the shared object for each +multilib libstdc++.a installed: + +

Extract the shared objects from the currently installed +libstdc++.a archive: +

     % ar -x libstdc++.a libstdc++.so.4 libstdc++.so.5
+
+

Enable the ‘F_LOADONLY’ flag so that the shared object will be +available for runtime dynamic loading, but not linking: +

     % strip -e libstdc++.so.4 libstdc++.so.5
+
+

Archive the runtime-only shared object in the GCC 3.4 +libstdc++.a archive: +

     % ar -q libstdc++.a libstdc++.so.4 libstdc++.so.5
+
+

Linking executables and shared libraries may produce warnings of +duplicate symbols. The assembly files generated by GCC for AIX always +have included multiple symbol definitions for certain global variable +and function declarations in the original program. The warnings should +not prevent the linker from producing a correct library or runnable +executable. + +

AIX 4.3 utilizes a “large format” archive to support both 32-bit and +64-bit object modules. The routines provided in AIX 4.3.0 and AIX 4.3.1 +to parse archive libraries did not handle the new format correctly. +These routines are used by GCC and result in error messages during +linking such as “not a COFF file”. The version of the routines shipped +with AIX 4.3.1 should work for a 32-bit environment. The -g +option of the archive command may be used to create archives of 32-bit +objects using the original “small format”. A correct version of the +routines is shipped with AIX 4.3.2 and above. + +

Some versions of the AIX binder (linker) can fail with a relocation +overflow severe error when the -bbigtoc option is used to link +GCC-produced object files into an executable that overflows the TOC. A fix +for APAR IX75823 (OVERFLOW DURING LINK WHEN USING GCC AND -BBIGTOC) is +available from IBM Customer Support and from its +techsupport.services.ibm.com +website as PTF U455193. + +

The AIX 4.3.2.1 linker (bos.rte.bind_cmds Level 4.3.2.1) will dump core +with a segmentation fault when invoked by any version of GCC. A fix for +APAR IX87327 is available from IBM Customer Support and from its +techsupport.services.ibm.com +website as PTF U461879. This fix is incorporated in AIX 4.3.3 and above. + +

The initial assembler shipped with AIX 4.3.0 generates incorrect object +files. A fix for APAR IX74254 (64BIT DISASSEMBLED OUTPUT FROM COMPILER FAILS +TO ASSEMBLE/BIND) is available from IBM Customer Support and from its +techsupport.services.ibm.com +website as PTF U453956. This fix is incorporated in AIX 4.3.1 and above. + +

AIX provides National Language Support (NLS). Compilers and assemblers +use NLS to support locale-specific representations of various data +formats including floating-point numbers (e.g., ‘.’ vs ‘,’ for +separating decimal fractions). There have been problems reported where +GCC does not produce the same floating-point formats that the assembler +expects. If one encounters this problem, set the LANG +environment variable to ‘C’ or ‘En_US’. + +

A default can be specified with the -mcpu=cpu_type +switch and using the configure option --with-cpu-cpu_type. + +

+ +

iq2000-*-elf

+ +

Vitesse IQ2000 processors. These are used in embedded +applications. There are no standard Unix configurations. + +

+ +

lm32-*-elf

+ +

Lattice Mico32 processor. +This configuration is intended for embedded systems. + +

+ +

lm32-*-uclinux

+ +

Lattice Mico32 processor. +This configuration is intended for embedded systems running uClinux. + +

+ +

m32c-*-elf

+ +

Renesas M32C processor. +This configuration is intended for embedded systems. + +

+ +

m32r-*-elf

+ +

Renesas M32R processor. +This configuration is intended for embedded systems. + +

+ +

m6811-elf

+ +

Motorola 68HC11 family micro controllers. These are used in embedded +applications. There are no standard Unix configurations. + +

+ +

m6812-elf

+ +

Motorola 68HC12 family micro controllers. These are used in embedded +applications. There are no standard Unix configurations. + +

+ +

m68k-*-*

+ +

By default, +‘m68k-*-elf*’, ‘m68k-*-rtems’, ‘m68k-*-uclinux’ and +‘m68k-*-linux’ +build libraries for both M680x0 and ColdFire processors. If you only +need the M680x0 libraries, you can omit the ColdFire ones by passing +--with-arch=m68k to configure. Alternatively, you +can omit the M680x0 libraries by passing --with-arch=cf to +configure. These targets default to 5206 or 5475 code as +appropriate for the target system when +configured with --with-arch=cf and 68020 code otherwise. + +

The ‘m68k-*-netbsd’ and +‘m68k-*-openbsd’ targets also support the --with-arch +option. They will generate ColdFire CFV4e code when configured with +--with-arch=cf and 68020 code otherwise. + +

You can override the default processors listed above by configuring +with --with-cpu=target. This target can either +be a -mcpu argument or one of the following values: +‘m68000’, ‘m68010’, ‘m68020’, ‘m68030’, +‘m68040’, ‘m68060’, ‘m68020-40’ and ‘m68020-60’. + +

+ +

m68k-*-uclinux

+ +

GCC 4.3 changed the uClinux configuration so that it uses the +‘m68k-linux-gnu’ ABI rather than the ‘m68k-elf’ ABI. +It also added improved support for C++ and flat shared libraries, +both of which were ABI changes. However, you can still use the +original ABI by configuring for ‘m68k-uclinuxoldabi’ or +‘m68k-vendor-uclinuxoldabi’. + +

+ +

mep-*-elf

+ +

Toshiba Media embedded Processor. +This configuration is intended for embedded systems. + +

+ +

microblaze-*-elf

+ +

Xilinx MicroBlaze processor. +This configuration is intended for embedded systems. + +

+ +

mips-*-*

+ +

If on a MIPS system you get an error message saying “does not have gp +sections for all it's [sic] sectons [sic]”, don't worry about it. This +happens whenever you use GAS with the MIPS linker, but there is not +really anything wrong, and it is okay to use the output file. You can +stop such warnings by installing the GNU linker. + +

It would be nice to extend GAS to produce the gp tables, but they are +optional, and there should not be a warning about their absence. + +

The libstdc++ atomic locking routines for MIPS targets requires MIPS II +and later. A patch went in just after the GCC 3.3 release to +make ‘mips*-*-*’ use the generic implementation instead. You can also +configure for ‘mipsel-elf’ as a workaround. The +‘mips*-*-linux*’ target continues to use the MIPS II routines. More +work on this is expected in future releases. + + + +

The built-in __sync_* functions are available on MIPS II and +later systems and others that support the ‘ll’, ‘sc’ and +‘sync’ instructions. This can be overridden by passing +--with-llsc or --without-llsc when configuring GCC. +Since the Linux kernel emulates these instructions if they are +missing, the default for ‘mips*-*-linux*’ targets is +--with-llsc. The --with-llsc and +--without-llsc configure options may be overridden at compile +time by passing the -mllsc or -mno-llsc options to +the compiler. + +

MIPS systems check for division by zero (unless +-mno-check-zero-division is passed to the compiler) by +generating either a conditional trap or a break instruction. Using +trap results in smaller code, but is only supported on MIPS II and +later. Also, some versions of the Linux kernel have a bug that +prevents trap from generating the proper signal (SIGFPE). To enable +the use of break, use the --with-divide=breaks +configure option when configuring GCC. The default is to +use traps on systems that support them. + +

Cross-compilers for the MIPS as target using the MIPS assembler +currently do not work, because the auxiliary programs +mips-tdump.c and mips-tfile.c can't be compiled on +anything but a MIPS. It does work to cross compile for a MIPS +if you use the GNU assembler and linker. + +

The assembler from GNU binutils 2.17 and earlier has a bug in the way +it sorts relocations for REL targets (o32, o64, EABI). This can cause +bad code to be generated for simple C++ programs. Also the linker +from GNU binutils versions prior to 2.17 has a bug which causes the +runtime linker stubs in very large programs, like libgcj.so, to +be incorrectly generated. GNU Binutils 2.18 and later (and snapshots +made after Nov. 9, 2006) should be free from both of these problems. + +

+ +

mips-sgi-irix5

+ +

Support for IRIX 5 has been removed in GCC 4.6. + +

+ +

mips-sgi-irix6

+ +

Support for IRIX 6 releases before 6.5 has been removed in GCC 4.6, as +well as support for +the O32 ABI. It is strongly recommended to upgrade to at least +IRIX 6.5.18. This release introduced full ISO C99 support, though for +the N32 and N64 ABIs only. + +

To build and use GCC on IRIX 6.5, you need the IRIX Development Foundation +(IDF) and IRIX Development Libraries (IDL). They are included with the +IRIX 6.5 media. + +

If you are using SGI's MIPSpro cc as your bootstrap compiler, you must +ensure that the N32 ABI is in use. To test this, compile a simple C +file with cc and then run file on the +resulting object file. The output should look like: + +

     test.o: ELF N32 MSB ...
+
+

If you see: + +

     test.o: ELF 32-bit MSB ...
+
+

or + +

     test.o: ELF 64-bit MSB ...
+
+

then your version of cc uses the O32 or N64 ABI by default. You +should set the environment variable CC to ‘cc -n32’ +before configuring GCC. + +

If you want the resulting gcc to run on old 32-bit systems +with the MIPS R4400 CPU, you need to ensure that only code for the ‘mips3’ +instruction set architecture (ISA) is generated. While GCC 3.x does +this correctly, both GCC 2.95 and SGI's MIPSpro cc may change +the ISA depending on the machine where GCC is built. Using one of them +as the bootstrap compiler may result in ‘mips4’ code, which won't run at +all on ‘mips3’-only systems. For the test program above, you should see: + +

     test.o: ELF N32 MSB mips-3 ...
+
+

If you get: + +

     test.o: ELF N32 MSB mips-4 ...
+
+

instead, you should set the environment variable CC to ‘cc +-n32 -mips3’ or ‘gcc -mips3’ respectively before configuring GCC. + +

MIPSpro C 7.4 may cause bootstrap failures, due to a bug when inlining +memcmp. Either add -U__INLINE_INTRINSICS to the CC +environment variable as a workaround or upgrade to MIPSpro C 7.4.1m. + +

GCC on IRIX 6.5 is usually built to support the N32 and N64 ABIs. If +you build GCC on a system that doesn't have the N64 libraries installed +or cannot run 64-bit binaries, +you need to configure with --disable-multilib so GCC doesn't +try to use them. +Look for /usr/lib64/libc.so.1 to see if you +have the 64-bit libraries installed. + +

GCC must be configured with GNU as. The latest version, from GNU +binutils 2.21, is known to work. On the other hand, bootstrap fails +with GNU ld at least since GNU binutils 2.17. + +

The --enable-libgcj +option is disabled by default: IRIX 6 uses a very low default limit +(20480) for the command line length. Although libtool contains a +workaround for this problem, at least the N64 ‘libgcj’ is known not +to build despite this, running into an internal error of the native +ld. A sure fix is to increase this limit (‘ncargs’) to +its maximum of 262144 bytes. If you have root access, you can use the +systune command to do this. + + +

wchar_t support in ‘libstdc++’ is not available for old +IRIX 6.5.x releases, x < 19. The problem cannot be autodetected +and in order to build GCC for such targets you need to configure with +--disable-wchar_t. + +

+ +

moxie-*-elf

+ +

The moxie processor. See http://moxielogic.org/ for more +information about this processor. + +

+ +

powerpc-*-*

+ +

You can specify a default version for the -mcpu=cpu_type +switch by using the configure option --with-cpu-cpu_type. + +

You will need +binutils 2.15 +or newer for a working GCC. + +

+ +

powerpc-*-darwin*

+ +

PowerPC running Darwin (Mac OS X kernel). + +

Pre-installed versions of Mac OS X may not include any developer tools, +meaning that you will not be able to build GCC from source. Tool +binaries are available at +http://opensource.apple.com/. + +

This version of GCC requires at least cctools-590.36. The +cctools-590.36 package referenced from +http://gcc.gnu.org/ml/gcc/2006-03/msg00507.html will not work +on systems older than 10.3.9 (aka darwin7.9.0). + +

+ +

powerpc-*-elf

+ +

PowerPC system in big endian mode, running System V.4. + +

+ +

powerpc*-*-linux-gnu*

+ +

PowerPC system in big endian mode running Linux. + +

+ +

powerpc-*-netbsd*

+ +

PowerPC system in big endian mode running NetBSD. + +

+ +

powerpc-*-eabisim

+ +

Embedded PowerPC system in big endian mode for use in running under the +PSIM simulator. + +

+ +

powerpc-*-eabi

+ +

Embedded PowerPC system in big endian mode. + +

+ +

powerpcle-*-elf

+ +

PowerPC system in little endian mode, running System V.4. + +

+ +

powerpcle-*-eabisim

+ +

Embedded PowerPC system in little endian mode for use in running under +the PSIM simulator. + +

+ +

powerpcle-*-eabi

+ +

Embedded PowerPC system in little endian mode. + +

+ +

rx-*-elf

+ +

The Renesas RX processor. See +http://eu.renesas.com/fmwk.jsp?cnt=rx600_series_landing.jsp&fp=/products/mpumcu/rx_family/rx600_series +for more information about this processor. + +

+ +

s390-*-linux*

+ +

S/390 system running GNU/Linux for S/390. + +

+ +

s390x-*-linux*

+ +

zSeries system (64-bit) running GNU/Linux for zSeries. + +

+ +

s390x-ibm-tpf*

+ +

zSeries system (64-bit) running TPF. This platform is +supported as cross-compilation target only. + +

+ + + + +

*-*-solaris2*

+ +

Support for Solaris 7 has been removed in GCC 4.6. + +

Sun does not ship a C compiler with Solaris 2, though you can download +the Sun Studio compilers for free. Alternatively, +you can install a pre-built GCC to bootstrap and install GCC. See the +binaries page for details. + +

The Solaris 2 /bin/sh will often fail to configure +‘libstdc++-v3’, ‘boehm-gc’ or ‘libjava’. We therefore +recommend using the following initial sequence of commands + +

     % CONFIG_SHELL=/bin/ksh
+     % export CONFIG_SHELL
+
+

and proceed as described in the configure instructions. +In addition we strongly recommend specifying an absolute path to invoke +srcdir/configure. + +

Solaris 2 comes with a number of optional OS packages. Some of these +are needed to use GCC fully, namely SUNWarc, +SUNWbtool, SUNWesu, SUNWhea, SUNWlibm, +SUNWsprot, and SUNWtoo. If you did not install all +optional packages when installing Solaris 2, you will need to verify that +the packages that GCC needs are installed. + +

To check whether an optional package is installed, use +the pkginfo command. To add an optional package, use the +pkgadd command. For further details, see the Solaris 2 +documentation. + +

Trying to use the linker and other tools in +/usr/ucb to install GCC has been observed to cause trouble. +For example, the linker may hang indefinitely. The fix is to remove +/usr/ucb from your PATH. + +

The build process works more smoothly with the legacy Sun tools so, if you +have /usr/xpg4/bin in your PATH, we recommend that you place +/usr/bin before /usr/xpg4/bin for the duration of the build. + +

We recommend the use of the Sun assembler or the GNU assembler, in +conjunction with the Sun linker. The GNU as +versions included in Solaris 10, from GNU binutils 2.15, and Solaris 11, +from GNU binutils 2.19, are known to work. They can be found in +/usr/sfw/bin/gas. Current versions of GNU binutils (2.21) +are known to work as well. Note that your mileage may vary +if you use a combination of the GNU tools and the Sun tools: while the +combination GNU as + Sun ld should reasonably work, +the reverse combination Sun as + GNU ld is known to +cause memory corruption at runtime in some cases for C++ programs. + +GNU ld usually works as well, although the version included in +Solaris 10 cannot be used due to several bugs. Again, the current +version (2.21) is known to work, but generally lacks platform specific +features, so better stay with Sun ld. + +

To enable symbol versioning in ‘libstdc++’ with Sun ld, +you need to have any version of GNU c++filt, which is part of +GNU binutils. ‘libstdc++’ symbol versioning will be disabled if no +appropriate version is found. Sun c++filt from the Sun Studio +compilers does not work. + +

Sun bug 4296832 turns up when compiling X11 headers with GCC 2.95 or +newer: g++ will complain that types are missing. These headers +assume that omitting the type means int; this assumption worked for +C90 but is wrong for C++, and is now wrong for C99 also. + +

g++ accepts such (invalid) constructs with the option +-fpermissive; it will assume that any missing type is int +(as defined by C90). + +

There are patches for Solaris 8 (108652-24 or newer for SPARC, +108653-22 for Intel) that fix this bug. + +

Sun bug 4927647 sometimes causes random spurious testsuite failures +related to missing diagnostic output. This bug doesn't affect GCC +itself, rather it is a kernel bug triggered by the expect +program which is used only by the GCC testsuite driver. When the bug +causes the expect program to miss anticipated output, extra +testsuite failures appear. + +

There are patches for Solaris 8 (117350-12 or newer for SPARC, +117351-12 or newer for Intel) and Solaris 9 (117171-11 or newer for +SPARC, 117172-11 or newer for Intel) that address this problem. + +

Solaris 8 provides an alternate implementation of the thread libraries, +‘libpthread’ and ‘libthread’. They are required for TLS +support and have been made the default in Solaris 9, so they are always +used on Solaris 8. + +

Thread-local storage (TLS) is supported in Solaris 8 and 9, but requires +some patches. The ‘libthread’ patches provide the +__tls_get_addr (SPARC, 64-bit x86) resp. ___tls_get_addr +(32-bit x86) functions. On Solaris 8, you need 108993-26 or newer on +SPARC, 108994-26 or newer on Intel. On Solaris 9, the necessary support +on SPARC is present since FCS, while 114432-05 or newer is required on +Intel. Additionally, on Solaris 8, patch 109147-14 or newer on SPARC or +109148-22 or newer on Intel are required for the Sun ld and +runtime linker (ld.so.1) support. Again, Solaris 9/SPARC +works since FCS, while 113986-02 is required on Intel. The linker +patches must be installed even if GNU ld is used. Sun +as in Solaris 8 and 9 doesn't support the necessary +relocations, so GNU as must be used. The configure +script checks for those prerequisites and automatically enables TLS +support if they are met. Although those minimal patch versions should +work, it is recommended to use the latest patch versions which include +additional bug fixes. + +

+ +

sparc*-*-*

+ +

This section contains general configuration information for all +SPARC-based platforms. In addition to reading this section, please +read all other sections that match your target. + +

Newer versions of the GNU Multiple Precision Library (GMP), the MPFR +library and the MPC library are known to be miscompiled by earlier +versions of GCC on these platforms. We therefore recommend the use +of the exact versions of these libraries listed as minimal versions +in the prerequisites. + +

+ +

sparc-sun-solaris2*

+ +

When GCC is configured to use GNU binutils 2.14 or later, the binaries +produced are smaller than the ones produced using Sun's native tools; +this difference is quite significant for binaries containing debugging +information. + +

Starting with Solaris 7, the operating system is capable of executing +64-bit SPARC V9 binaries. GCC 3.1 and later properly supports +this; the -m64 option enables 64-bit code generation. +However, if all you want is code tuned for the UltraSPARC CPU, you +should try the -mtune=ultrasparc option instead, which produces +code that, unlike full 64-bit code, can still run on non-UltraSPARC +machines. + +

When configuring on a Solaris 7 or later system that is running a kernel +that supports only 32-bit binaries, one must configure with +--disable-multilib, since we will not be able to build the +64-bit target libraries. + +

GCC 3.3 and GCC 3.4 trigger code generation bugs in earlier versions of +the GNU compiler (especially GCC 3.0.x versions), which lead to the +miscompilation of the stage1 compiler and the subsequent failure of the +bootstrap process. A workaround is to use GCC 3.2.3 as an intermediary +stage, i.e. to bootstrap that compiler with the base compiler and then +use it to bootstrap the final compiler. + +

GCC 3.4 triggers a code generation bug in versions 5.4 (Sun ONE Studio 7) +and 5.5 (Sun ONE Studio 8) of the Sun compiler, which causes a bootstrap +failure in form of a miscompilation of the stage1 compiler by the Sun +compiler. This is Sun bug 4974440. This is fixed with patch 112760-07. + +

GCC 3.4 changed the default debugging format from Stabs to DWARF-2 for +32-bit code on Solaris 7 and later. If you use the Sun assembler, this +change apparently runs afoul of Sun bug 4910101 (which is referenced as +an x86-only problem by Sun, probably because they do not use DWARF-2). +A symptom of the problem is that you cannot compile C++ programs like +groff 1.19.1 without getting messages similar to the following: + +

     ld: warning: relocation error: R_SPARC_UA32: ...
+       external symbolic relocation against non-allocatable section
+       .debug_info cannot be processed at runtime: relocation ignored.
+
+

To work around this problem, compile with -gstabs+ instead of +plain -g. + +

When configuring the GNU Multiple Precision Library (GMP), the MPFR +library or the MPC library on a Solaris 7 or later system, the canonical +target triplet must be specified as the build parameter on the +configure line. This target triplet can be obtained by invoking ./config.guess in the toplevel source directory of GCC (and +not that of GMP or MPFR or MPC). For example on a Solaris 9 system: + +

     % ./configure --build=sparc-sun-solaris2.9 --prefix=xxx
+
+

+ +

sparc-sun-solaris2.10

+ +

There is a bug in older versions of the Sun assembler which breaks +thread-local storage (TLS). A typical error message is + +

     ld: fatal: relocation error: R_SPARC_TLS_LE_HIX22: file /var/tmp//ccamPA1v.o:
+       symbol <unknown>: bad symbol type SECT: symbol type must be TLS
+
+

This bug is fixed in Sun patch 118683-03 or later. + +

+ +

sparc-*-linux*

+ +

GCC versions 3.0 and higher require binutils 2.11.2 and glibc 2.2.4 +or newer on this platform. All earlier binutils and glibc +releases mishandled unaligned relocations on sparc-*-* targets. + +

+ +

sparc64-*-solaris2*

+ +

When configuring the GNU Multiple Precision Library (GMP), the MPFR +library or the MPC library, the canonical target triplet must be specified +as the build parameter on the configure line. For example +on a Solaris 9 system: + +

     % ./configure --build=sparc64-sun-solaris2.9 --prefix=xxx
+
+

The following compiler flags must be specified in the configure +step in order to bootstrap this target with the Sun compiler: + +

     % CC="cc -xarch=v9 -xildoff" srcdir/configure [options] [target]
+
+

-xarch=v9 specifies the SPARC-V9 architecture to the Sun toolchain +and -xildoff turns off the incremental linker. + +

+ +

sparcv9-*-solaris2*

+ +

This is a synonym for ‘sparc64-*-solaris2*’. + +

+ +

*-*-vxworks*

+ +

Support for VxWorks is in flux. At present GCC supports only the +very recent VxWorks 5.5 (aka Tornado 2.2) release, and only on PowerPC. +We welcome patches for other architectures supported by VxWorks 5.5. +Support for VxWorks AE would also be welcome; we believe this is merely +a matter of writing an appropriate “configlette” (see below). We are +not interested in supporting older, a.out or COFF-based, versions of +VxWorks in GCC 3. + +

VxWorks comes with an older version of GCC installed in +$WIND_BASE/host; we recommend you do not overwrite it. +Choose an installation prefix entirely outside $WIND_BASE. +Before running configure, create the directories prefix +and prefix/bin. Link or copy the appropriate assembler, +linker, etc. into prefix/bin, and set your PATH to +include that directory while running both configure and +make. + +

You must give configure the +--with-headers=$WIND_BASE/target/h switch so that it can +find the VxWorks system headers. Since VxWorks is a cross compilation +target only, you must also specify --target=target. +configure will attempt to create the directory +prefix/target/sys-include and copy files into it; +make sure the user running configure has sufficient privilege +to do so. + +

GCC's exception handling runtime requires a special “configlette” +module, contrib/gthr_supp_vxw_5x.c. Follow the instructions in +that file to add the module to your kernel build. (Future versions of +VxWorks will incorporate this module.) + +

+ +

x86_64-*-*, amd64-*-*

+ +

GCC supports the x86-64 architecture implemented by the AMD64 processor +(amd64-*-* is an alias for x86_64-*-*) on GNU/Linux, FreeBSD and NetBSD. +On GNU/Linux the default is a bi-arch compiler which is able to generate +both 64-bit x86-64 and 32-bit x86 code (via the -m32 switch). + +

+ +

xtensa*-*-elf

+ +

This target is intended for embedded Xtensa systems using the +‘newlib’ C library. It uses ELF but does not support shared +objects. Designed-defined instructions specified via the +Tensilica Instruction Extension (TIE) language are only supported +through inline assembly. + +

The Xtensa configuration information must be specified prior to +building GCC. The include/xtensa-config.h header +file contains the configuration information. If you created your +own Xtensa configuration with the Xtensa Processor Generator, the +downloaded files include a customized copy of this header file, +which you can use to replace the default header file. + +

+ +

xtensa*-*-linux*

+ +

This target is for Xtensa systems running GNU/Linux. It supports ELF +shared objects and the GNU C library (glibc). It also generates +position-independent code (PIC) regardless of whether the +-fpic or -fPIC options are used. In other +respects, this target is the same as the +‘xtensa*-*-elf’ target. + +

+ +

Microsoft Windows

+ +

Intel 16-bit versions

+ +

The 16-bit versions of Microsoft Windows, such as Windows 3.1, are not +supported. + +

However, the 32-bit port has limited support for Microsoft +Windows 3.11 in the Win32s environment, as a target only. See below. + +

Intel 32-bit versions

+ +

The 32-bit versions of Windows, including Windows 95, Windows NT, Windows +XP, and Windows Vista, are supported by several different target +platforms. These targets differ in which Windows subsystem they target +and which C libraries are used. + +

+ +

Intel 64-bit versions

+ +

GCC contains support for x86-64 using the mingw-w64 +runtime library, available from http://mingw-w64.sourceforge.net/. +This library should be used with the target triple x86_64-pc-mingw32. + +

Presently Windows for Itanium is not supported. + +

Windows CE

+ +

Windows CE is supported as a target only on ARM (arm-wince-pe), Hitachi +SuperH (sh-wince-pe), and MIPS (mips-wince-pe). + +

Other Windows Platforms

+ +

GCC no longer supports Windows NT on the Alpha or PowerPC. + +

GCC no longer supports the Windows POSIX subsystem. However, it does +support the Interix subsystem. See above. + +

Old target names including *-*-winnt and *-*-windowsnt are no longer used. + +

PW32 (i386-pc-pw32) support was never completed, and the project seems to +be inactive. See http://pw32.sourceforge.net/ for more information. + +

UWIN support has been removed due to a lack of maintenance. + +

+ +

*-*-cygwin

+ +

Ports of GCC are included with the +Cygwin environment. + +

GCC will build under Cygwin without modification; it does not build +with Microsoft's C++ compiler and there are no plans to make it do so. + +

The Cygwin native compiler can be configured to target any 32-bit x86 +cpu architecture desired; the default is i686-pc-cygwin. It should be +used with as up-to-date a version of binutils as possible; use either +the latest official GNU binutils release in the Cygwin distribution, +or version 2.20 or above if building your own. + +

+ +

*-*-interix

+ +

The Interix target is used by OpenNT, Interix, Services For UNIX (SFU), +and Subsystem for UNIX-based Applications (SUA). Applications compiled +with this target run in the Interix subsystem, which is separate from +the Win32 subsystem. This target was last known to work in GCC 3.3. + +

+ +

*-*-mingw32

+ +

GCC will build with and support only MinGW runtime 3.12 and later. +Earlier versions of headers are incompatible with the new default semantics +of extern inline in -std=c99 and -std=gnu99 modes. + +

+ +

Older systems

+ +

GCC contains support files for many older (1980s and early +1990s) Unix variants. For the most part, support for these systems +has not been deliberately removed, but it has not been maintained for +several years and may suffer from bitrot. + +

Starting with GCC 3.1, each release has a list of “obsoleted” systems. +Support for these systems is still present in that release, but +configure will fail unless the --enable-obsolete +option is given. Unless a maintainer steps forward, support for these +systems will be removed from the next release of GCC. + +

Support for old systems as hosts for GCC can cause problems if the +workarounds for compiler, library and operating system bugs affect the +cleanliness or maintainability of the rest of GCC. In some cases, to +bring GCC up on such a system, if still possible with current GCC, may +require first installing an old version of GCC which did work on that +system, and using it to compile a more recent GCC, to avoid bugs in the +vendor compiler. Old releases of GCC 1 and GCC 2 are available in the +old-releases directory on the GCC mirror sites. Header bugs may generally be avoided using +fixincludes, but bugs or deficiencies in libraries and the +operating system may still cause problems. + +

Support for older systems as targets for cross-compilation is less +problematic than support for them as hosts for GCC; if an enthusiast +wishes to make such a target work again (including resurrecting any of +the targets that never worked with GCC 2, starting from the last +version before they were removed), patches +following the usual requirements would be +likely to be accepted, since they should not affect the support for more +modern targets. + +

For some systems, old versions of GNU binutils may also be useful, +and are available from pub/binutils/old-releases on +sourceware.org mirror sites. + +

Some of the information on specific systems above relates to +such older systems, but much of the information +about GCC on such systems (which may no longer be applicable to +current GCC) is to be found in the GCC texinfo manual. + +

+ +

all ELF targets (SVR4, Solaris 2, etc.)

+ +

C++ support is significantly better on ELF targets if you use the +GNU linker; duplicate copies of +inlines, vtables and template instantiations will be discarded +automatically. + +

+

Return to the GCC Installation page + + + + + + + diff --git a/INSTALL/test.html b/INSTALL/test.html new file mode 100644 index 000000000..ce8556bd6 --- /dev/null +++ b/INSTALL/test.html @@ -0,0 +1,233 @@ + + +Installing GCC: Testing + + + + + + + + + + +

Installing GCC: Testing

+ +Before you install GCC, we encourage you to run the testsuites and to +compare your results with results from a similar configuration that have +been submitted to the +gcc-testresults mailing list. +Some of these archived results are linked from the build status lists +at http://gcc.gnu.org/buildstat.html, although not everyone who +reports a successful build runs the testsuites and submits the results. +This step is optional and may require you to download additional software, +but it can give you confidence in your new GCC installation or point out +problems before you install and start using your new GCC. + +

First, you must have downloaded the testsuites. +These are part of the full distribution, but if you downloaded the +“core” compiler plus any front ends, you must download the testsuites +separately. + +

Second, you must have the testing tools installed. This includes +DejaGnu, Tcl, and Expect; +the DejaGnu site has links to these. + +

If the directories where runtest and expect were +installed are not in the PATH, you may need to set the following +environment variables appropriately, as in the following example (which +assumes that DejaGnu has been installed under /usr/local): + +

     TCL_LIBRARY = /usr/local/share/tcl8.0
+     DEJAGNULIBS = /usr/local/share/dejagnu
+
+

(On systems such as Cygwin, these paths are required to be actual +paths, not mounts or links; presumably this is due to some lack of +portability in the DejaGnu code.) + +

Finally, you can run the testsuite (which may take a long time): +

     cd objdir; make -k check
+
+

This will test various components of GCC, such as compiler +front ends and runtime libraries. While running the testsuite, DejaGnu +might emit some harmless messages resembling +‘WARNING: Couldn't find the global config file.’ or +‘WARNING: Couldn't find tool init file’ that can be ignored. + +

If you are testing a cross-compiler, you may want to run the testsuite +on a simulator as described at http://gcc.gnu.org/simtest-howto.html. + +

How can you run the testsuite on selected tests?

+ +

In order to run sets of tests selectively, there are targets +‘make check-gcc’ and ‘make check-g++’ +in the gcc subdirectory of the object directory. You can also +just run ‘make check’ in a subdirectory of the object directory. + +

A more selective way to just run all gcc execute tests in the +testsuite is to use + +

     make check-gcc RUNTESTFLAGS="execute.exp other-options"
+
+

Likewise, in order to run only the g++ “old-deja” tests in +the testsuite with filenames matching ‘9805*’, you would use + +

     make check-g++ RUNTESTFLAGS="old-deja.exp=9805* other-options"
+
+

The *.exp files are located in the testsuite directories of the GCC +source, the most important ones being compile.exp, +execute.exp, dg.exp and old-deja.exp. +To get a list of the possible *.exp files, pipe the +output of ‘make check’ into a file and look at the +‘Running ... .exp’ lines. + +

Passing options and running multiple testsuites

+ +

You can pass multiple options to the testsuite using the +‘--target_board’ option of DejaGNU, either passed as part of +‘RUNTESTFLAGS’, or directly to runtest if you prefer to +work outside the makefiles. For example, + +

     make check-g++ RUNTESTFLAGS="--target_board=unix/-O3/-fmerge-constants"
+
+

will run the standard g++ testsuites (“unix” is the target name +for a standard native testsuite situation), passing +‘-O3 -fmerge-constants’ to the compiler on every test, i.e., +slashes separate options. + +

You can run the testsuites multiple times using combinations of options +with a syntax similar to the brace expansion of popular shells: + +

     ..."--target_board=arm-sim\{-mhard-float,-msoft-float\}\{-O1,-O2,-O3,\}"
+
+

(Note the empty option caused by the trailing comma in the final group.) +The following will run each testsuite eight times using the ‘arm-sim’ +target, as if you had specified all possible combinations yourself: + +

     --target_board=arm-sim/-mhard-float/-O1
+     --target_board=arm-sim/-mhard-float/-O2
+     --target_board=arm-sim/-mhard-float/-O3
+     --target_board=arm-sim/-mhard-float
+     --target_board=arm-sim/-msoft-float/-O1
+     --target_board=arm-sim/-msoft-float/-O2
+     --target_board=arm-sim/-msoft-float/-O3
+     --target_board=arm-sim/-msoft-float
+
+

They can be combined as many times as you wish, in arbitrary ways. This +list: + +

     ..."--target_board=unix/-Wextra\{-O3,-fno-strength\}\{-fomit-frame,\}"
+
+

will generate four combinations, all involving ‘-Wextra’. + +

The disadvantage to this method is that the testsuites are run in serial, +which is a waste on multiprocessor systems. For users with GNU Make and +a shell which performs brace expansion, you can run the testsuites in +parallel by having the shell perform the combinations and make +do the parallel runs. Instead of using ‘--target_board’, use a +special makefile target: + +

     make -jN check-testsuite//test-target/option1/option2/...
+
+

For example, + +

     make -j3 check-gcc//sh-hms-sim/{-m1,-m2,-m3,-m3e,-m4}/{,-nofpu}
+
+

will run three concurrent “make-gcc” testsuites, eventually testing all +ten combinations as described above. Note that this is currently only +supported in the gcc subdirectory. (To see how this works, try +typing echo before the example given here.) + +

Additional testing for Java Class Libraries

+ +

The Java runtime tests can be executed via ‘make check’ +in the target/libjava/testsuite directory in +the build tree. + +

The Mauve Project provides +a suite of tests for the Java Class Libraries. This suite can be run +as part of libgcj testing by placing the Mauve tree within the libjava +testsuite at libjava/testsuite/libjava.mauve/mauve, or by +specifying the location of that tree when invoking ‘make’, as in +‘make MAUVEDIR=~/mauve check’. + +

How to interpret test results

+ +

The result of running the testsuite are various *.sum and *.log +files in the testsuite subdirectories. The *.log files contain a +detailed log of the compiler invocations and the corresponding +results, the *.sum files summarize the results. These summaries +contain status codes for all tests: + +

+ +

It is normal for some tests to report unexpected failures. At the +current time the testing harness does not allow fine grained control +over whether or not a test is expected to fail. This problem should +be fixed in future releases. + +

Submitting test results

+ +

If you want to report the results to the GCC project, use the +contrib/test_summary shell script. Start it in the objdir with + +

     srcdir/contrib/test_summary -p your_commentary.txt \
+         -m gcc-testresults@gcc.gnu.org |sh
+
+

This script uses the Mail program to send the results, so +make sure it is in your PATH. The file your_commentary.txt is +prepended to the testsuite summary and should contain any special +remarks you have on your results or your build environment. Please +do not edit the testsuite result block or the subject line, as these +messages may be automatically processed. + +

+

Return to the GCC Installation page + + + + + + + + + + -- cgit v1.2.3