# 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 #. 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=2:0:0 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 case "${host}" in *-darwin*) # Darwin needs -single_module when linking libobjc extra_ldflags_libobjc=-Wl,-single_module ;; *-cygwin*|*-mingw*) # Tell libtool to build DLLs on Windows extra_ldflags_libobjc='-no-undefined -bindir $(bindir)' ;; esac AC_SUBST(extra_ldflags_libobjc) AC_SUBST(CFLAGS) AC_CHECK_TOOL(AS, as) AC_CHECK_TOOL(AR, ar) AC_CHECK_TOOL(RANLIB, ranlib, :) AC_PROG_INSTALL AM_MAINTAINER_MODE # Enable Win32 DLL on MS Windows - FIXME AC_LIBTOOL_WIN32_DLL AC_PROG_LIBTOOL AM_PROG_CC_C_O AC_PROG_MAKE_SET # ------- # Headers # ------- # Sanity check for the cross-compilation case: AC_CHECK_HEADER(stdio.h,:, [AC_MSG_ERROR([Can't find stdio.h. You must have a usable C system for the target already installed, at least including headers and, preferably, the library, before you can configure the Objective C runtime system. If necessary, install gcc now with \`LANGUAGES=c', then the target library, then build with \`LANGUAGES=objc'.])]) AC_HEADER_STDC AC_CHECK_HEADERS(sched.h) # ----------- # Miscellanea # ----------- AC_MSG_CHECKING([for thread model used by GCC]) target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'` AC_MSG_RESULT([$target_thread_file]) if test $target_thread_file != single; then AC_DEFINE(HAVE_GTHR_DEFAULT, 1, [Define if the compiler has a thread header that is non single.]) fi AC_MSG_CHECKING([for exception model to use]) AC_LANG_PUSH(C) AC_ARG_ENABLE(sjlj-exceptions, AS_HELP_STRING([--enable-sjlj-exceptions], [force use of builtin_setjmp for exceptions]), [:], [dnl Botheration. Now we've got to detect the exception model. dnl Link tests against libgcc.a are problematic since -- at least dnl as of this writing -- we've not been given proper -L bits for dnl single-tree newlib and libgloss. dnl dnl This is what AC_TRY_COMPILE would do if it didn't delete the dnl conftest files before we got a change to grep them first. cat > conftest.$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