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Diffstat (limited to 'libobjc/configure.ac')
| -rw-r--r-- | libobjc/configure.ac | 287 |
1 files changed, 287 insertions, 0 deletions
diff --git a/libobjc/configure.ac b/libobjc/configure.ac new file mode 100644 index 000000000..494a289ec --- /dev/null +++ b/libobjc/configure.ac @@ -0,0 +1,287 @@ +# Process this file with autoconf to produce a configure script. +# Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2001, 2002, 2003, 2004 +# 2005, 2006, 2009 Free Software Foundation, Inc. +# Originally contributed by Dave Love (d.love@dl.ac.uk). +# +#This file is part of GCC. +# +#GCC is free software; you can redistribute it and/or modify +#it under the terms of the GNU General Public License as published by +#the Free Software Foundation; either version 3, or (at your option) +#any later version. +# +#GCC is distributed in the hope that it will be useful, +#but WITHOUT ANY WARRANTY; without even the implied warranty of +#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +#GNU General Public License for more details. +# +#You should have received a copy of the GNU General Public License +#along with GCC; see the file COPYING3. If not see +#<http://www.gnu.org/licenses/>. + +AC_PREREQ(2.64) +AC_INIT(package-unused, version-unused,, libobjc) +AC_CONFIG_SRCDIR([objc/objc.h]) +GCC_TOPLEV_SUBDIRS + +# We need the following definitions because AC_PROG_LIBTOOL relies on them +PACKAGE=libobjc +# Version is pulled out to make it a bit easier to change using sed. +VERSION=3:0:0 +AC_SUBST(VERSION) + +# This works around the fact that libtool configuration may change LD +# for this particular configuration, but some shells, instead of +# keeping the changes in LD private, export them just because LD is +# exported. +ORIGINAL_LD_FOR_MULTILIBS=$LD + +# ------- +# Options +# ------- + +# We use these options to decide which functions to include. +AC_ARG_WITH(target-subdir, +[ --with-target-subdir=SUBDIR + configuring in a subdirectory]) +AC_ARG_WITH(cross-host, +[ --with-cross-host=HOST configuring with a cross compiler]) + +AC_MSG_CHECKING([for --enable-version-specific-runtime-libs]) +AC_ARG_ENABLE(version-specific-runtime-libs, +[ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ], +[case "$enableval" in + yes) version_specific_libs=yes ;; + no) version_specific_libs=no ;; + *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);; + esac], +[version_specific_libs=no]) +AC_MSG_RESULT($version_specific_libs) + +AC_ARG_ENABLE(objc-gc, +[ --enable-objc-gc enable the use of Boehm's garbage collector with + the GNU Objective-C runtime.], +[case $enable_objc_gc in + no) + OBJC_BOEHM_GC='' + OBJC_BOEHM_GC_INCLUDES='' + ;; + *) + OBJC_BOEHM_GC=libobjc_gc.la + OBJC_BOEHM_GC_INCLUDES='-I$(top_srcdir)/../boehm-gc/include -I../boehm-gc/include' + ;; +esac], +[OBJC_BOEHM_GC=''; OBJC_BOEHM_GC_INCLUDES='']) +AC_SUBST(OBJC_BOEHM_GC) +AC_SUBST(OBJC_BOEHM_GC_INCLUDES) + +# ----------- +# Directories +# ----------- + +# Find the rest of the source tree framework. +AM_ENABLE_MULTILIB(, ..) + +AC_CANONICAL_SYSTEM +ACX_NONCANONICAL_TARGET + +# Export source directory. +# These need to be absolute paths, yet at the same time need to +# canonicalize only relative paths, because then amd will not unmount +# drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd. +case $srcdir in + [\\/$]* | ?:[\\/]*) glibcpp_srcdir=${srcdir} ;; + *) glibcpp_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;; +esac +AC_SUBST(glibcpp_srcdir) + +# Calculate toolexeclibdir +# Also toolexecdir, though it's only used in toolexeclibdir +case ${version_specific_libs} in + yes) + # Need the gcc compiler version to know where to install libraries + # and header files if --enable-version-specific-runtime-libs option + # is selected. + toolexecdir='$(libdir)/gcc/$(target_noncanonical)' + toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)' + ;; + no) + if test -n "$with_cross_host" && + test x"$with_cross_host" != x"no"; then + # Install a library built with a cross compiler in tooldir, not libdir. + toolexecdir='$(exec_prefix)/$(target_noncanonical)' + toolexeclibdir='$(toolexecdir)/lib' + else + toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)' + toolexeclibdir='$(libdir)' + fi + multi_os_directory=`$CC -print-multi-os-directory` + case $multi_os_directory in + .) ;; # Avoid trailing /. + *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;; + esac + ;; +esac +AC_SUBST(toolexecdir) +AC_SUBST(toolexeclibdir) + +# Figure out if we want to name the include directory and the +# library name changes differently. +includedirname=include +libsuffix= +case "${host}" in + *-darwin*) + # Darwin is the only target so far that needs a different include directory. + includedirname=include-gnu-runtime + libsuffix=-gnu + ;; +esac +AC_SUBST(includedirname) +AC_SUBST(libsuffix) + +AC_CONFIG_HEADERS(config.h) + +# -------- +# Programs +# -------- + +GCC_NO_EXECUTABLES + +# We must force CC to /not/ be a precious variable; otherwise +# the wrong, non-multilib-adjusted value will be used in multilibs. +# As a side effect, we have to subst CFLAGS ourselves. +m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS]) +m4_define([_AC_ARG_VAR_PRECIOUS],[]) +AC_PROG_CC +m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) + +# extra LD Flags which are required for targets +ACX_LT_HOST_FLAGS +case "${host}" in + *-darwin*) + # Darwin needs -single_module when linking libobjc + extra_ldflags_libobjc='$(lt_host_flags) -Wl,-single_module' + ;; + *-cygwin*|*-mingw*) + # Tell libtool to build DLLs on Windows + extra_ldflags_libobjc='$(lt_host_flags)' + ;; +esac +AC_SUBST(extra_ldflags_libobjc) + +AC_SUBST(CFLAGS) + +AC_CHECK_TOOL(AS, as) +AC_CHECK_TOOL(AR, ar) +AC_CHECK_TOOL(RANLIB, ranlib, :) +AC_PROG_INSTALL + +AM_MAINTAINER_MODE + +# Enable Win32 DLL on MS Windows - FIXME +AC_LIBTOOL_WIN32_DLL + +AC_PROG_LIBTOOL + +AM_PROG_CC_C_O + +AC_PROG_MAKE_SET + +# ------- +# Headers +# ------- + +# Sanity check for the cross-compilation case: +AC_CHECK_HEADER(stdio.h,:, + [AC_MSG_ERROR([Can't find stdio.h. +You must have a usable C system for the target already installed, at least +including headers and, preferably, the library, before you can configure +the Objective C runtime system. If necessary, install gcc now with +\`LANGUAGES=c', then the target library, then build with \`LANGUAGES=objc'.])]) + +AC_HEADER_STDC + +AC_CHECK_HEADERS(sched.h) + +# ----------- +# Miscellanea +# ----------- + +AC_MSG_CHECKING([for thread model used by GCC]) +target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'` +AC_MSG_RESULT([$target_thread_file]) + +if test $target_thread_file != single; then + AC_DEFINE(HAVE_GTHR_DEFAULT, 1, + [Define if the compiler has a thread header that is non single.]) +fi + +# Check if we have thread-local storage +GCC_CHECK_TLS + +AC_MSG_CHECKING([for exception model to use]) +AC_LANG_PUSH(C) +AC_ARG_ENABLE(sjlj-exceptions, + AS_HELP_STRING([--enable-sjlj-exceptions], + [force use of builtin_setjmp for exceptions]), +[:], +[dnl Botheration. Now we've got to detect the exception model. +dnl Link tests against libgcc.a are problematic since -- at least +dnl as of this writing -- we've not been given proper -L bits for +dnl single-tree newlib and libgloss. +dnl +dnl This is what AC_TRY_COMPILE would do if it didn't delete the +dnl conftest files before we got a change to grep them first. +cat > conftest.$ac_ext << EOF +[#]line __oline__ "configure" +@interface Frob +@end +@implementation Frob +@end +int proc(); +int foo() +{ + @try { + return proc(); + } + @catch (Frob* ex) { + return 0; + } +} +EOF +old_CFLAGS="$CFLAGS" +dnl work around that we don't have Objective-C support in autoconf +CFLAGS="-x objective-c -fgnu-runtime -fobjc-exceptions -S" +if AC_TRY_EVAL(ac_compile); then + if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then + enable_sjlj_exceptions=yes + elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then + enable_sjlj_exceptions=no + fi +fi +CFLAGS="$old_CFLAGS" +rm -f conftest*]) +if test x$enable_sjlj_exceptions = xyes; then + AC_DEFINE(SJLJ_EXCEPTIONS, 1, + [Define if the compiler is configured for setjmp/longjmp exceptions.]) + ac_exception_model_name=sjlj +elif test x$enable_sjlj_exceptions = xno; then + ac_exception_model_name="call frame" +else + AC_MSG_ERROR([unable to detect exception model]) +fi +AC_LANG_POP(C) +AC_MSG_RESULT($ac_exception_model_name) + +# ------ +# Output +# ------ + +if test ${multilib} = yes; then + multilib_arg="--enable-multilib" +else + multilib_arg= +fi + +AC_CONFIG_FILES([Makefile]) +AC_OUTPUT |