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. --- gcc/acinclude.m4 | 523 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 523 insertions(+) create mode 100644 gcc/acinclude.m4 (limited to 'gcc/acinclude.m4') diff --git a/gcc/acinclude.m4 b/gcc/acinclude.m4 new file mode 100644 index 000000000..3eec559e8 --- /dev/null +++ b/gcc/acinclude.m4 @@ -0,0 +1,523 @@ +dnl Copyright (C) 2005, 2006, 2007, 2008 Free Software Foundation, Inc. +dnl +dnl This file is part of GCC. +dnl +dnl GCC is free software; you can redistribute it and/or modify +dnl it under the terms of the GNU General Public License as published by +dnl the Free Software Foundation; either version 3, or (at your option) +dnl any later version. +dnl +dnl GCC is distributed in the hope that it will be useful, +dnl but WITHOUT ANY WARRANTY; without even the implied warranty of +dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +dnl GNU General Public License for more details. +dnl +dnl You should have received a copy of the GNU General Public License +dnl along with GCC; see the file COPYING3. If not see +dnl . + +dnl See whether we need a declaration for a function. +dnl The result is highly dependent on the INCLUDES passed in, so make sure +dnl to use a different cache variable name in this macro if it is invoked +dnl in a different context somewhere else. +dnl gcc_AC_CHECK_DECL(SYMBOL, +dnl [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND [, INCLUDES]]]) +AC_DEFUN([gcc_AC_CHECK_DECL], +[AC_MSG_CHECKING([whether $1 is declared]) +AC_CACHE_VAL(gcc_cv_have_decl_$1, +[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([$4], +[#ifndef $1 +char *(*pfn) = (char *(*)) $1 ; +#endif])], eval "gcc_cv_have_decl_$1=yes", eval "gcc_cv_have_decl_$1=no")]) +if eval "test \"`echo '$gcc_cv_have_decl_'$1`\" = yes"; then + AC_MSG_RESULT(yes) ; ifelse([$2], , :, [$2]) +else + AC_MSG_RESULT(no) ; ifelse([$3], , :, [$3]) +fi +])dnl + +dnl Check multiple functions to see whether each needs a declaration. +dnl Arrange to define HAVE_DECL_ to 0 or 1 as appropriate. +dnl gcc_AC_CHECK_DECLS(SYMBOLS, +dnl [ACTION-IF-NEEDED [, ACTION-IF-NOT-NEEDED [, INCLUDES]]]) +AC_DEFUN([gcc_AC_CHECK_DECLS], +[AC_FOREACH([gcc_AC_Func], [$1], + [AH_TEMPLATE(AS_TR_CPP(HAVE_DECL_[]gcc_AC_Func), + [Define to 1 if we found a declaration for ']gcc_AC_Func[', otherwise + define to 0.])])dnl +for ac_func in $1 +do + ac_tr_decl=AS_TR_CPP([HAVE_DECL_$ac_func]) +gcc_AC_CHECK_DECL($ac_func, + [AC_DEFINE_UNQUOTED($ac_tr_decl, 1) $2], + [AC_DEFINE_UNQUOTED($ac_tr_decl, 0) $3], +dnl It is possible that the include files passed in here are local headers +dnl which supply a backup declaration for the relevant prototype based on +dnl the definition of (or lack of) the HAVE_DECL_ macro. If so, this test +dnl will always return success. E.g. see libiberty.h's handling of +dnl `basename'. To avoid this, we define the relevant HAVE_DECL_ macro to +dnl 1 so that any local headers used do not provide their own prototype +dnl during this test. +#undef $ac_tr_decl +#define $ac_tr_decl 1 + $4 +) +done +]) + +dnl 'make compare' can be significantly faster, if cmp itself can +dnl skip bytes instead of using tail. The test being performed is +dnl "if cmp --ignore-initial=2 t1 t2 && ! cmp --ignore-initial=1 t1 t2" +dnl but we need to sink errors and handle broken shells. We also test +dnl for the parameter format "cmp file1 file2 skip1 skip2" which is +dnl accepted by cmp on some systems. +AC_DEFUN([gcc_AC_PROG_CMP_IGNORE_INITIAL], +[AC_CACHE_CHECK([for cmp's capabilities], gcc_cv_prog_cmp_skip, +[ echo abfoo >t1 + echo cdfoo >t2 + gcc_cv_prog_cmp_skip=slowcompare + if cmp --ignore-initial=2 t1 t2 > /dev/null 2>&1; then + if cmp --ignore-initial=1 t1 t2 > /dev/null 2>&1; then + : + else + gcc_cv_prog_cmp_skip=gnucompare + fi + fi + if test $gcc_cv_prog_cmp_skip = slowcompare ; then + if cmp t1 t2 2 2 > /dev/null 2>&1; then + if cmp t1 t2 1 1 > /dev/null 2>&1; then + : + else + gcc_cv_prog_cmp_skip=fastcompare + fi + fi + fi + rm t1 t2 +]) +make_compare_target=$gcc_cv_prog_cmp_skip +AC_SUBST(make_compare_target) +]) + +dnl See if symbolic links work and if not, try to substitute either hard links or simple copy. +AC_DEFUN([gcc_AC_PROG_LN_S], +[AC_MSG_CHECKING(whether ln -s works) +AC_CACHE_VAL(gcc_cv_prog_LN_S, +[rm -f conftestdata_t +echo >conftestdata_f +if ln -s conftestdata_f conftestdata_t 2>/dev/null +then + gcc_cv_prog_LN_S="ln -s" +else + if ln conftestdata_f conftestdata_t 2>/dev/null + then + gcc_cv_prog_LN_S=ln + else + if cp -p conftestdata_f conftestdata_t 2>/dev/null + then + gcc_cv_prog_LN_S="cp -p" + else + gcc_cv_prog_LN_S=cp + fi + fi +fi +rm -f conftestdata_f conftestdata_t +])dnl +LN_S="$gcc_cv_prog_LN_S" +if test "$gcc_cv_prog_LN_S" = "ln -s"; then + AC_MSG_RESULT(yes) +else + if test "$gcc_cv_prog_LN_S" = "ln"; then + AC_MSG_RESULT([no, using ln]) + else + AC_MSG_RESULT([no, and neither does ln, so using $gcc_cv_prog_LN_S]) + fi +fi +AC_SUBST(LN_S)dnl +]) + +dnl Define MKDIR_TAKES_ONE_ARG if mkdir accepts only one argument instead +dnl of the usual 2. +AC_DEFUN([gcc_AC_FUNC_MKDIR_TAKES_ONE_ARG], +[AC_CACHE_CHECK([if mkdir takes one argument], gcc_cv_mkdir_takes_one_arg, +[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([ +#include +#ifdef HAVE_SYS_STAT_H +# include +#endif +#ifdef HAVE_UNISTD_H +# include +#endif +#ifdef HAVE_DIRECT_H +# include +#endif], [mkdir ("foo", 0);])], + gcc_cv_mkdir_takes_one_arg=no, gcc_cv_mkdir_takes_one_arg=yes)]) +if test $gcc_cv_mkdir_takes_one_arg = yes ; then + AC_DEFINE(MKDIR_TAKES_ONE_ARG, 1, [Define if host mkdir takes a single argument.]) +fi +]) + +AC_DEFUN([gcc_AC_PROG_INSTALL], +[AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT])dnl +# Find a good install program. We prefer a C program (faster), +# so one script is as good as another. But avoid the broken or +# incompatible versions: +# SysV /etc/install, /usr/sbin/install +# SunOS /usr/etc/install +# IRIX /sbin/install +# AIX /bin/install +# AFS /usr/afsws/bin/install, which mishandles nonexistent args +# SVR4 /usr/ucb/install, which tries to use the nonexistent group "staff" +# ./install, which can be erroneously created by make from ./install.sh. +AC_MSG_CHECKING(for a BSD compatible install) +if test -z "$INSTALL"; then +AC_CACHE_VAL(ac_cv_path_install, +[ IFS="${IFS= }"; ac_save_IFS="$IFS"; IFS="${IFS}:" + for ac_dir in $PATH; do + # Account for people who put trailing slashes in PATH elements. + case "$ac_dir/" in + /|./|.//|/etc/*|/usr/sbin/*|/usr/etc/*|/sbin/*|/usr/afsws/bin/*|/usr/ucb/*) ;; + *) + # OSF1 and SCO ODT 3.0 have their own names for install. + for ac_prog in ginstall scoinst install; do + if test -f $ac_dir/$ac_prog; then + if test $ac_prog = install && + grep dspmsg $ac_dir/$ac_prog >/dev/null 2>&1; then + # AIX install. It has an incompatible calling convention. + # OSF/1 installbsd also uses dspmsg, but is usable. + : + else + ac_cv_path_install="$ac_dir/$ac_prog -c" + break 2 + fi + fi + done + ;; + esac + done + IFS="$ac_save_IFS" +])dnl + if test "${ac_cv_path_install+set}" = set; then + INSTALL="$ac_cv_path_install" + else + # As a last resort, use the slow shell script. We don't cache a + # path for INSTALL within a source directory, because that will + # break other packages using the cache if that directory is + # removed, or if the path is relative. + INSTALL="$ac_install_sh" + fi +fi +dnl We do special magic for INSTALL instead of AC_SUBST, to get +dnl relative paths right. +AC_MSG_RESULT($INSTALL) +AC_SUBST(INSTALL)dnl + +# Use test -z because SunOS4 sh mishandles braces in ${var-val}. +# It thinks the first close brace ends the variable substitution. +test -z "$INSTALL_PROGRAM" && INSTALL_PROGRAM='${INSTALL}' +AC_SUBST(INSTALL_PROGRAM)dnl + +test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644' +AC_SUBST(INSTALL_DATA)dnl +]) + +# mmap(2) blacklisting. Some platforms provide the mmap library routine +# but don't support all of the features we need from it. +AC_DEFUN([gcc_AC_FUNC_MMAP_BLACKLIST], +[ +AC_CHECK_HEADER([sys/mman.h], + [gcc_header_sys_mman_h=yes], [gcc_header_sys_mman_h=no]) +AC_CHECK_FUNC([mmap], [gcc_func_mmap=yes], [gcc_func_mmap=no]) +if test "$gcc_header_sys_mman_h" != yes \ + || test "$gcc_func_mmap" != yes; then + gcc_cv_func_mmap_file=no + gcc_cv_func_mmap_dev_zero=no + gcc_cv_func_mmap_anon=no +else + AC_CACHE_CHECK([whether read-only mmap of a plain file works], + gcc_cv_func_mmap_file, + [# Add a system to this blacklist if + # mmap(0, stat_size, PROT_READ, MAP_PRIVATE, fd, 0) doesn't return a + # memory area containing the same data that you'd get if you applied + # read() to the same fd. The only system known to have a problem here + # is VMS, where text files have record structure. + case "$host_os" in + vms* | ultrix*) + gcc_cv_func_mmap_file=no ;; + *) + gcc_cv_func_mmap_file=yes;; + esac]) + AC_CACHE_CHECK([whether mmap from /dev/zero works], + gcc_cv_func_mmap_dev_zero, + [# Add a system to this blacklist if it has mmap() but /dev/zero + # does not exist, or if mmapping /dev/zero does not give anonymous + # zeroed pages with both the following properties: + # 1. If you map N consecutive pages in with one call, and then + # unmap any subset of those pages, the pages that were not + # explicitly unmapped remain accessible. + # 2. If you map two adjacent blocks of memory and then unmap them + # both at once, they must both go away. + # Systems known to be in this category are Windows (all variants), + # VMS, and Darwin. + case "$host_os" in + vms* | cygwin* | pe | mingw* | darwin* | ultrix* | hpux10* | hpux11.00) + gcc_cv_func_mmap_dev_zero=no ;; + *) + gcc_cv_func_mmap_dev_zero=yes;; + esac]) + + # Unlike /dev/zero, the MAP_ANON(YMOUS) defines can be probed for. + AC_CACHE_CHECK([for MAP_ANON(YMOUS)], gcc_cv_decl_map_anon, + [AC_COMPILE_IFELSE([AC_LANG_PROGRAM( +[#include +#include +#include + +#ifndef MAP_ANONYMOUS +#define MAP_ANONYMOUS MAP_ANON +#endif +], +[int n = MAP_ANONYMOUS;])], + gcc_cv_decl_map_anon=yes, + gcc_cv_decl_map_anon=no)]) + + if test $gcc_cv_decl_map_anon = no; then + gcc_cv_func_mmap_anon=no + else + AC_CACHE_CHECK([whether mmap with MAP_ANON(YMOUS) works], + gcc_cv_func_mmap_anon, + [# Add a system to this blacklist if it has mmap() and MAP_ANON or + # MAP_ANONYMOUS, but using mmap(..., MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) + # doesn't give anonymous zeroed pages with the same properties listed + # above for use of /dev/zero. + # Systems known to be in this category are Windows, VMS, and SCO Unix. + case "$host_os" in + vms* | cygwin* | pe | mingw* | sco* | udk* ) + gcc_cv_func_mmap_anon=no ;; + *) + gcc_cv_func_mmap_anon=yes;; + esac]) + fi +fi + +if test $gcc_cv_func_mmap_file = yes; then + AC_DEFINE(HAVE_MMAP_FILE, 1, + [Define if read-only mmap of a plain file works.]) +fi +if test $gcc_cv_func_mmap_dev_zero = yes; then + AC_DEFINE(HAVE_MMAP_DEV_ZERO, 1, + [Define if mmap of /dev/zero works.]) +fi +if test $gcc_cv_func_mmap_anon = yes; then + AC_DEFINE(HAVE_MMAP_ANON, 1, + [Define if mmap with MAP_ANON(YMOUS) works.]) +fi +]) + +dnl Determine if enumerated bitfields are unsigned. ISO C says they can +dnl be either signed or unsigned. +dnl +AC_DEFUN([gcc_AC_C_ENUM_BF_UNSIGNED], +[AC_CACHE_CHECK(for unsigned enumerated bitfields, gcc_cv_enum_bf_unsigned, +[AC_RUN_IFELSE([AC_LANG_SOURCE([#include +enum t { BLAH = 128 } ; +struct s_t { enum t member : 8; } s ; +int main(void) +{ + s.member = BLAH; + if (s.member < 0) exit(1); + exit(0); + +}])], gcc_cv_enum_bf_unsigned=yes, gcc_cv_enum_bf_unsigned=no, gcc_cv_enum_bf_unsigned=yes)]) +if test $gcc_cv_enum_bf_unsigned = yes; then + AC_DEFINE(ENUM_BITFIELDS_ARE_UNSIGNED, 1, + [Define if enumerated bitfields are treated as unsigned values.]) +fi]) + +dnl Probe number of bits in a byte. +dnl Note C89 requires CHAR_BIT >= 8. +dnl +AC_DEFUN([gcc_AC_C_CHAR_BIT], +[AC_CACHE_CHECK(for CHAR_BIT, gcc_cv_decl_char_bit, +[AC_EGREP_CPP(found, +[#ifdef HAVE_LIMITS_H +#include +#endif +#ifdef CHAR_BIT +found +#endif], gcc_cv_decl_char_bit=yes, gcc_cv_decl_char_bit=no) +]) +if test $gcc_cv_decl_char_bit = no; then + AC_CACHE_CHECK(number of bits in a byte, gcc_cv_c_nbby, +[i=8 + gcc_cv_c_nbby= + while test $i -lt 65; do + AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, + [switch(0) { + case (unsigned char)((unsigned long)1 << $i) == ((unsigned long)1 << $i): + case (unsigned char)((unsigned long)1<<($i-1)) == ((unsigned long)1<<($i-1)): + ; }])], + [gcc_cv_c_nbby=$i; break]) + i=`expr $i + 1` + done + test -z "$gcc_cv_c_nbby" && gcc_cv_c_nbby=failed +]) +if test $gcc_cv_c_nbby = failed; then + AC_MSG_ERROR(cannot determine number of bits in a byte) +else + AC_DEFINE_UNQUOTED(CHAR_BIT, $gcc_cv_c_nbby, + [Define as the number of bits in a byte, if `limits.h' doesn't.]) +fi +fi]) + +AC_DEFUN([gcc_AC_INITFINI_ARRAY], +[AC_ARG_ENABLE(initfini-array, + [ --enable-initfini-array use .init_array/.fini_array sections], + [], [ +AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support, + gcc_cv_initfini_array, [dnl + AC_RUN_IFELSE([AC_LANG_SOURCE([ +static int x = -1; +int main (void) { return x; } +int foo (void) { x = 0; } +int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;])], + [gcc_cv_initfini_array=yes], [gcc_cv_initfini_array=no], + [gcc_cv_initfini_array=no])]) + enable_initfini_array=$gcc_cv_initfini_array +]) +if test $enable_initfini_array = yes; then + AC_DEFINE(HAVE_INITFINI_ARRAY, 1, + [Define .init_array/.fini_array sections are available and working.]) +fi]) + +dnl # _gcc_COMPUTE_GAS_VERSION +dnl # Used by gcc_GAS_VERSION_GTE_IFELSE +dnl # +dnl # WARNING: +dnl # gcc_cv_as_gas_srcdir must be defined before this. +dnl # This gross requirement will go away eventually. +AC_DEFUN([_gcc_COMPUTE_GAS_VERSION], +[gcc_cv_as_bfd_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/bfd +for f in $gcc_cv_as_bfd_srcdir/configure \ + $gcc_cv_as_gas_srcdir/configure \ + $gcc_cv_as_gas_srcdir/configure.in \ + $gcc_cv_as_gas_srcdir/Makefile.in ; do + gcc_cv_gas_version=`sed -n -e 's/^[[ ]]*\(VERSION=[[0-9]]*\.[[0-9]]*.*\)/\1/p' < $f` + if test x$gcc_cv_gas_version != x; then + break + fi +done +gcc_cv_gas_major_version=`expr "$gcc_cv_gas_version" : "VERSION=\([[0-9]]*\)"` +gcc_cv_gas_minor_version=`expr "$gcc_cv_gas_version" : "VERSION=[[0-9]]*\.\([[0-9]]*\)"` +gcc_cv_gas_patch_version=`expr "$gcc_cv_gas_version" : "VERSION=[[0-9]]*\.[[0-9]]*\.\([[0-9]]*\)"` +case $gcc_cv_gas_patch_version in + "") gcc_cv_gas_patch_version="0" ;; +esac +gcc_cv_gas_vers=`expr \( \( $gcc_cv_gas_major_version \* 1000 \) \ + + $gcc_cv_gas_minor_version \) \* 1000 \ + + $gcc_cv_gas_patch_version` +]) []dnl # _gcc_COMPUTE_GAS_VERSION + +dnl # gcc_GAS_VERSION_GTE_IFELSE([elf,] major, minor, patchlevel, +dnl # [command_if_true = :], [command_if_false = :]) +dnl # Check to see if the version of GAS is greater than or +dnl # equal to the specified version. +dnl # +dnl # The first ifelse() shortens the shell code if the patchlevel +dnl # is unimportant (the usual case). The others handle missing +dnl # commands. Note that the tests are structured so that the most +dnl # common version number cases are tested first. +AC_DEFUN([_gcc_GAS_VERSION_GTE_IFELSE], +[ifelse([$1], elf, + [if test $in_tree_gas_is_elf = yes \ + &&], + [if]) test $gcc_cv_gas_vers -ge `expr \( \( $2 \* 1000 \) + $3 \) \* 1000 + $4` + then dnl +ifelse([$5],,:,[$5])[]dnl +ifelse([$6],,,[ + else $6]) +fi]) + +AC_DEFUN([gcc_GAS_VERSION_GTE_IFELSE], +[AC_REQUIRE([_gcc_COMPUTE_GAS_VERSION])dnl +ifelse([$1], elf, [_gcc_GAS_VERSION_GTE_IFELSE($@)], + [_gcc_GAS_VERSION_GTE_IFELSE(,$@)])]) + +dnl # gcc_GAS_FLAGS +dnl # Used by gcc_GAS_CHECK_FEATURE +dnl # +AC_DEFUN([gcc_GAS_FLAGS], +[AC_CACHE_CHECK([assembler flags], gcc_cv_as_flags, +[ case "$target" in + i[[34567]]86-*-linux*) + dnl Always pass --32 to ia32 Linux assembler. + gcc_cv_as_flags="--32" + ;; + powerpc*-*-darwin*) + dnl Always pass -arch ppc to assembler. + gcc_cv_as_flags="-arch ppc" + ;; + *) + gcc_cv_as_flags=" " + ;; + esac]) +]) + +dnl gcc_GAS_CHECK_FEATURE(description, cv, [[elf,]major,minor,patchlevel], +dnl [extra switches to as], [assembler input], +dnl [extra testing logic], [command if feature available]) +dnl +dnl Checks for an assembler feature. If we are building an in-tree +dnl gas, the feature is available if the associated assembler version +dnl is greater than or equal to major.minor.patchlevel. If not, then +dnl ASSEMBLER INPUT is fed to the assembler and the feature is available +dnl if assembly succeeds. If EXTRA TESTING LOGIC is not the empty string, +dnl then it is run instead of simply setting CV to "yes" - it is responsible +dnl for doing so, if appropriate. +AC_DEFUN([gcc_GAS_CHECK_FEATURE], +[AC_REQUIRE([gcc_GAS_FLAGS])dnl +AC_CACHE_CHECK([assembler for $1], [$2], + [[$2]=no + ifelse([$3],,,[dnl + if test $in_tree_gas = yes; then + gcc_GAS_VERSION_GTE_IFELSE($3, [[$2]=yes]) + el])if test x$gcc_cv_as != x; then + echo ifelse(m4_substr([$5],0,1),[$], "[$5]", '[$5]') > conftest.s + if AC_TRY_COMMAND([$gcc_cv_as $gcc_cv_as_flags $4 -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD]) + then + ifelse([$6],, [$2]=yes, [$6]) + else + echo "configure: failed program was" >&AS_MESSAGE_LOG_FD + cat conftest.s >&AS_MESSAGE_LOG_FD + fi + rm -f conftest.o conftest.s + fi]) +ifelse([$7],,,[dnl +if test $[$2] = yes; then + $7 +fi])]) + +dnl GCC_TARGET_TEMPLATE(KEY) +dnl ------------------------ +dnl Define KEY as a valid configure key on the target machine. + +m4_define([GCC_TARGET_TEMPLATE], +[m4_define([GCC_TARGET_TEMPLATE($1)],[])]) + +dnl AH_TEMPLATE(KEY, DESCRIPTION) +dnl ----------------------------- +dnl Issue an autoheader template for KEY, i.e., a comment composed of +dnl DESCRIPTION (properly wrapped), and then #undef KEY. Redefinition +dnl of the macro in autoheader.m4, to support definition of only a few +dnl keys while compiling target libraries. + +m4_define([AH_TEMPLATE], +[AH_VERBATIM([$1],m4_text_wrap([$2 */], [ ], [/* ]) +m4_ifdef([GCC_TARGET_TEMPLATE($1)],[],[#ifndef USED_FOR_TARGET +])[#undef $1]m4_ifdef([GCC_TARGET_TEMPLATE($1)],[],[ +#endif +]))]) + +dnl Make sure that build_exeext is looked for +AC_DEFUN([gcc_AC_BUILD_EXEEXT], [ +ac_executable_extensions="$build_exeext"]) + -- cgit v1.2.3