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 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 2, 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 COPYING. If not, write to
20 #the Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
24 AC_INIT(package-unused, version-unused,, libobjc)
25 AC_CONFIG_SRCDIR([objc/objc.h])
28 # We need the following definitions because AC_PROG_LIBTOOL relies on them
30 # Version is pulled out to make it a bit easier to change using sed.
34 # This works around the fact that libtool configuration may change LD
35 # for this particular configuration, but some shells, instead of
36 # keeping the changes in LD private, export them just because LD is
38 ORIGINAL_LD_FOR_MULTILIBS=$LD
44 # Default to --enable-multilib
45 AC_ARG_ENABLE(multilib,
46 [ --enable-multilib build hella library versions (default)],
47 [case "${enableval}" in
50 *) AC_MSG_ERROR(bad value ${enableval} for multilib option) ;;
54 # We use these options to decide which functions to include.
55 AC_ARG_WITH(target-subdir,
56 [ --with-target-subdir=SUBDIR
57 configuring in a subdirectory])
58 AC_ARG_WITH(cross-host,
59 [ --with-cross-host=HOST configuring with a cross compiler])
61 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
62 AC_ARG_ENABLE(version-specific-runtime-libs,
63 [ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
65 yes) version_specific_libs=yes ;;
66 no) version_specific_libs=no ;;
67 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
69 [version_specific_libs=no])
70 AC_MSG_RESULT($version_specific_libs)
72 AC_ARG_ENABLE(objc-gc,
73 [ --enable-objc-gc enable the use of Boehm's garbage collector with
74 the GNU Objective-C runtime.],
75 [case $enable_objc_gc in
78 OBJC_BOEHM_GC_INCLUDES=''
81 OBJC_BOEHM_GC=libobjc_gc.la
82 OBJC_BOEHM_GC_INCLUDES='-I$(top_srcdir)/../boehm-gc/include -I../boehm-gc/include'
85 [OBJC_BOEHM_GC=''; OBJC_BOEHM_GC_INCLUDES=''])
86 AC_SUBST(OBJC_BOEHM_GC)
87 AC_SUBST(OBJC_BOEHM_GC_INCLUDES)
93 # When building with srcdir == objdir, links to the source files will
94 # be created in directories within the target_subdir. We have to
95 # adjust toplevel_srcdir accordingly, so that configure finds
96 # install-sh and other auxiliary files that live in the top-level
98 if test "${srcdir}" = "."; then
99 if test -z "${with_target_subdir}"; then
102 if test "${with_target_subdir}" != "."; then
103 toprel="${with_multisrctop}../.."
105 toprel="${with_multisrctop}.."
111 AC_CONFIG_AUX_DIR(${srcdir}/$toprel)
112 toplevel_srcdir=\${srcdir}/$toprel
113 AC_SUBST(toplevel_srcdir)
116 ACX_NONCANONICAL_TARGET
118 # Export source directory.
119 # These need to be absolute paths, yet at the same time need to
120 # canonicalize only relative paths, because then amd will not unmount
121 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
123 [\\/$]* | ?:[\\/]*) glibcpp_srcdir=${srcdir} ;;
124 *) glibcpp_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
126 AC_SUBST(glibcpp_srcdir)
128 # Calculate toolexeclibdir
129 # Also toolexecdir, though it's only used in toolexeclibdir
130 case ${version_specific_libs} in
132 # Need the gcc compiler version to know where to install libraries
133 # and header files if --enable-version-specific-runtime-libs option
135 toolexecdir='$(libdir)/gcc/$(target_noncanonical)'
136 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
139 if test -n "$with_cross_host" &&
140 test x"$with_cross_host" != x"no"; then
141 # Install a library built with a cross compiler in tooldir, not libdir.
142 toolexecdir='$(exec_prefix)/$(target_noncanonical)'
143 toolexeclibdir='$(toolexecdir)/lib'
145 toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)'
146 toolexeclibdir='$(libdir)'
148 multi_os_directory=`$CC -print-multi-os-directory`
149 case $multi_os_directory in
150 .) ;; # Avoid trailing /.
151 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
155 AC_SUBST(toolexecdir)
156 AC_SUBST(toolexeclibdir)
158 # Figure out if we want to name the include directory and the
159 # library name changes differently.
160 includedirname=include
164 # Darwin is the only target so far that needs a different include directory.
165 includedirname=include-gnu-runtime
169 AC_SUBST(includedirname)
172 AC_CONFIG_HEADERS(config.h)
180 # We must force CC to /not/ be a precious variable; otherwise
181 # the wrong, non-multilib-adjusted value will be used in multilibs.
182 # As a side effect, we have to subst CFLAGS ourselves.
183 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
184 m4_define([_AC_ARG_VAR_PRECIOUS],[])
186 m4_rename([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
188 # extra LD Flags which are required for targets
191 # Darwin needs -single_module when linking libobjc
192 extra_ldflags_libobjc=-Wl,-single_module
195 AC_SUBST(extra_ldflags_libobjc)
199 AC_CHECK_TOOL(AS, as)
200 AC_CHECK_TOOL(AR, ar)
201 AC_CHECK_TOOL(RANLIB, ranlib, :)
206 # Enable Win32 DLL on MS Windows - FIXME
219 # Sanity check for the cross-compilation case:
220 AC_CHECK_HEADER(stdio.h,:,
221 [AC_MSG_ERROR([Can't find stdio.h.
222 You must have a usable C system for the target already installed, at least
223 including headers and, preferably, the library, before you can configure
224 the Objective C runtime system. If necessary, install gcc now with
225 \`LANGUAGES=c', then the target library, then build with \`LANGUAGES=objc'.])])
229 AC_CHECK_HEADERS(sched.h)
235 AC_MSG_CHECKING([for thread model used by GCC])
236 target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
237 AC_MSG_RESULT([$target_thread_file])
239 if test $target_thread_file != single; then
240 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
241 [Define if the compiler has a thread header that is non single.])
245 AC_MSG_CHECKING([for exception model to use])
247 AC_ARG_ENABLE(sjlj-exceptions,
248 AS_HELP_STRING([--enable-sjlj-exceptions],
249 [force use of builtin_setjmp for exceptions]),
251 [dnl Botheration. Now we've got to detect the exception model.
252 dnl Link tests against libgcc.a are problematic since -- at least
253 dnl as of this writing -- we've not been given proper -L bits for
254 dnl single-tree newlib and libgloss.
256 dnl This is what AC_TRY_COMPILE would do if it didn't delete the
257 dnl conftest files before we got a change to grep them first.
258 cat > conftest.$ac_ext << EOF
259 [#]line __oline__ "configure"
276 dnl work around that we don't have Objective-C support in autoconf
277 CFLAGS="-x objective-c -fgnu-runtime -fobjc-exceptions -S"
278 if AC_TRY_EVAL(ac_compile); then
279 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
280 enable_sjlj_exceptions=yes
281 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
282 enable_sjlj_exceptions=no
287 if test x$enable_sjlj_exceptions = xyes; then
288 AC_DEFINE(SJLJ_EXCEPTIONS, 1,
289 [Define if the compiler is configured for setjmp/longjmp exceptions.])
290 ac_exception_model_name=sjlj
291 elif test x$enable_sjlj_exceptions = xno; then
292 ac_exception_model_name="call frame"
294 AC_MSG_ERROR([unable to detect exception model])
297 AC_MSG_RESULT($ac_exception_model_name)
303 AC_CONFIG_FILES([Makefile])
305 AC_CONFIG_COMMANDS([default],
306 [[if test -n "$CONFIG_FILES"; then
307 if test -n "${with_target_subdir}"; then
308 # FIXME: We shouldn't need to set ac_file
310 LD="${ORIGINAL_LD_FOR_MULTILIBS}"
311 . ${toplevel_srcdir}/config-ml.in
317 with_target_subdir=${with_target_subdir}
318 with_multisubdir=${with_multisubdir}
319 ac_configure_args="--enable-multilib ${ac_configure_args}"
320 toplevel_srcdir=${toplevel_srcdir}
321 CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
322 ORIGINAL_LD_FOR_MULTILIBS="${ORIGINAL_LD_FOR_MULTILIBS}"