1 # Process this file with autoconf to produce a configure script.
2 # Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2001, 2002, 2003, 2004
3 # 2005, 2006, 2009 Free Software Foundation, Inc.
4 # Originally contributed by Dave Love (d.love@dl.ac.uk).
6 #This file is part of GCC.
8 #GCC is free software; you can redistribute it and/or modify
9 #it under the terms of the GNU General Public License as published by
10 #the Free Software Foundation; either version 3, or (at your option)
13 #GCC is distributed in the hope that it will be useful,
14 #but WITHOUT ANY WARRANTY; without even the implied warranty of
15 #MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 #GNU General Public License for more details.
18 #You should have received a copy of the GNU General Public License
19 #along with GCC; see the file COPYING3. If not see
20 #<http://www.gnu.org/licenses/>.
23 AC_INIT(package-unused, version-unused,, libobjc)
24 AC_CONFIG_SRCDIR([objc/objc.h])
27 # We need the following definitions because AC_PROG_LIBTOOL relies on them
29 # Version is pulled out to make it a bit easier to change using sed.
33 # This works around the fact that libtool configuration may change LD
34 # for this particular configuration, but some shells, instead of
35 # keeping the changes in LD private, export them just because LD is
37 ORIGINAL_LD_FOR_MULTILIBS=$LD
43 # We use these options to decide which functions to include.
44 AC_ARG_WITH(target-subdir,
45 [ --with-target-subdir=SUBDIR
46 configuring in a subdirectory])
47 AC_ARG_WITH(cross-host,
48 [ --with-cross-host=HOST configuring with a cross compiler])
50 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
51 AC_ARG_ENABLE(version-specific-runtime-libs,
52 [ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
54 yes) version_specific_libs=yes ;;
55 no) version_specific_libs=no ;;
56 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
58 [version_specific_libs=no])
59 AC_MSG_RESULT($version_specific_libs)
61 AC_ARG_ENABLE(objc-gc,
62 [ --enable-objc-gc enable the use of Boehm's garbage collector with
63 the GNU Objective-C runtime.],
64 [case $enable_objc_gc in
67 OBJC_BOEHM_GC_INCLUDES=''
70 OBJC_BOEHM_GC=libobjc_gc.la
71 OBJC_BOEHM_GC_INCLUDES='-I$(top_srcdir)/../boehm-gc/include -I../boehm-gc/include'
74 [OBJC_BOEHM_GC=''; OBJC_BOEHM_GC_INCLUDES=''])
75 AC_SUBST(OBJC_BOEHM_GC)
76 AC_SUBST(OBJC_BOEHM_GC_INCLUDES)
82 # Find the rest of the source tree framework.
83 AM_ENABLE_MULTILIB(, ..)
86 ACX_NONCANONICAL_TARGET
88 # Export source directory.
89 # These need to be absolute paths, yet at the same time need to
90 # canonicalize only relative paths, because then amd will not unmount
91 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
93 [\\/$]* | ?:[\\/]*) glibcpp_srcdir=${srcdir} ;;
94 *) glibcpp_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
96 AC_SUBST(glibcpp_srcdir)
98 # Calculate toolexeclibdir
99 # Also toolexecdir, though it's only used in toolexeclibdir
100 case ${version_specific_libs} in
102 # Need the gcc compiler version to know where to install libraries
103 # and header files if --enable-version-specific-runtime-libs option
105 toolexecdir='$(libdir)/gcc/$(target_noncanonical)'
106 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
109 if test -n "$with_cross_host" &&
110 test x"$with_cross_host" != x"no"; then
111 # Install a library built with a cross compiler in tooldir, not libdir.
112 toolexecdir='$(exec_prefix)/$(target_noncanonical)'
113 toolexeclibdir='$(toolexecdir)/lib'
115 toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)'
116 toolexeclibdir='$(libdir)'
118 multi_os_directory=`$CC -print-multi-os-directory`
119 case $multi_os_directory in
120 .) ;; # Avoid trailing /.
121 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
125 AC_SUBST(toolexecdir)
126 AC_SUBST(toolexeclibdir)
128 # Figure out if we want to name the include directory and the
129 # library name changes differently.
130 includedirname=include
134 # Darwin is the only target so far that needs a different include directory.
135 includedirname=include-gnu-runtime
139 AC_SUBST(includedirname)
142 AC_CONFIG_HEADERS(config.h)
150 # We must force CC to /not/ be a precious variable; otherwise
151 # the wrong, non-multilib-adjusted value will be used in multilibs.
152 # As a side effect, we have to subst CFLAGS ourselves.
153 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
154 m4_define([_AC_ARG_VAR_PRECIOUS],[])
156 m4_rename([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
158 # extra LD Flags which are required for targets
161 # Darwin needs -single_module when linking libobjc
162 extra_ldflags_libobjc=-Wl,-single_module
165 AC_SUBST(extra_ldflags_libobjc)
169 AC_CHECK_TOOL(AS, as)
170 AC_CHECK_TOOL(AR, ar)
171 AC_CHECK_TOOL(RANLIB, ranlib, :)
176 # Enable Win32 DLL on MS Windows - FIXME
189 # Sanity check for the cross-compilation case:
190 AC_CHECK_HEADER(stdio.h,:,
191 [AC_MSG_ERROR([Can't find stdio.h.
192 You must have a usable C system for the target already installed, at least
193 including headers and, preferably, the library, before you can configure
194 the Objective C runtime system. If necessary, install gcc now with
195 \`LANGUAGES=c', then the target library, then build with \`LANGUAGES=objc'.])])
199 AC_CHECK_HEADERS(sched.h)
205 AC_MSG_CHECKING([for thread model used by GCC])
206 target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
207 AC_MSG_RESULT([$target_thread_file])
209 if test $target_thread_file != single; then
210 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
211 [Define if the compiler has a thread header that is non single.])
215 AC_MSG_CHECKING([for exception model to use])
217 AC_ARG_ENABLE(sjlj-exceptions,
218 AS_HELP_STRING([--enable-sjlj-exceptions],
219 [force use of builtin_setjmp for exceptions]),
221 [dnl Botheration. Now we've got to detect the exception model.
222 dnl Link tests against libgcc.a are problematic since -- at least
223 dnl as of this writing -- we've not been given proper -L bits for
224 dnl single-tree newlib and libgloss.
226 dnl This is what AC_TRY_COMPILE would do if it didn't delete the
227 dnl conftest files before we got a change to grep them first.
228 cat > conftest.$ac_ext << EOF
229 [#]line __oline__ "configure"
246 dnl work around that we don't have Objective-C support in autoconf
247 CFLAGS="-x objective-c -fgnu-runtime -fobjc-exceptions -S"
248 if AC_TRY_EVAL(ac_compile); then
249 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
250 enable_sjlj_exceptions=yes
251 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
252 enable_sjlj_exceptions=no
257 if test x$enable_sjlj_exceptions = xyes; then
258 AC_DEFINE(SJLJ_EXCEPTIONS, 1,
259 [Define if the compiler is configured for setjmp/longjmp exceptions.])
260 ac_exception_model_name=sjlj
261 elif test x$enable_sjlj_exceptions = xno; then
262 ac_exception_model_name="call frame"
264 AC_MSG_ERROR([unable to detect exception model])
267 AC_MSG_RESULT($ac_exception_model_name)
273 if test ${multilib} = yes; then
274 multilib_arg="--enable-multilib"
279 AC_CONFIG_FILES([Makefile])