1 # Process this file with autoconf to produce a configure script.
2 # Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2001, 2002, 2003, 2004
3 # 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, 59 Temple Place - Suite 330, Boston, MA
24 AC_INIT(package-unused, version-unused,, libobjc)
25 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=$LD
43 # Default to --enable-multilib
44 AC_ARG_ENABLE(multilib,
45 [ --enable-multilib build hella library versions (default)],
46 [case "${enableval}" in
49 *) AC_MSG_ERROR(bad value ${enableval} for multilib option) ;;
53 # We use these options to decide which functions to include.
54 AC_ARG_WITH(target-subdir,
55 [ --with-target-subdir=SUBDIR
56 configuring in a subdirectory])
57 AC_ARG_WITH(cross-host,
58 [ --with-cross-host=HOST configuring with a cross compiler])
60 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
61 AC_ARG_ENABLE(version-specific-runtime-libs,
62 [ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
64 yes) version_specific_libs=yes ;;
65 no) version_specific_libs=no ;;
66 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
68 [version_specific_libs=no])
69 AC_MSG_RESULT($version_specific_libs)
71 AC_ARG_ENABLE(objc-gc,
72 [ --enable-objc-gc enable the use of Boehm's garbage collector with
73 the GNU Objective-C runtime.],
74 [case $enable_objc_gc in
75 no) OBJC_BOEHM_GC='' ;;
76 *) OBJC_BOEHM_GC=libobjc_gc.la ;;
79 AC_SUBST(OBJC_BOEHM_GC)
85 # When building with srcdir == objdir, links to the source files will
86 # be created in directories within the target_subdir. We have to
87 # adjust toplevel_srcdir accordingly, so that configure finds
88 # install-sh and other auxiliary files that live in the top-level
90 if test "${srcdir}" = "."; then
91 if test -z "${with_target_subdir}"; then
94 if test "${with_target_subdir}" != "."; then
95 toprel="${with_multisrctop}../.."
97 toprel="${with_multisrctop}.."
103 AC_CONFIG_AUX_DIR(${srcdir}/$toprel)
104 toplevel_srcdir=\${srcdir}/$toprel
105 AC_SUBST(toplevel_srcdir)
108 ACX_NONCANONICAL_TARGET
110 # Export source directory.
111 # These need to be absolute paths, yet at the same time need to
112 # canonicalize only relative paths, because then amd will not unmount
113 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
115 [\\/$]* | ?:[\\/]*) glibcpp_srcdir=${srcdir} ;;
116 *) glibcpp_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
118 AC_SUBST(glibcpp_srcdir)
120 # Process the option "--enable-version-specific-runtime-libs"
121 gcc_version_trigger=${srcdir}/../gcc/version.c
122 gcc_version_full=`grep version_string ${gcc_version_trigger} | sed -e 's/.*\"\([[^ \"]]*\)[[ \"]].*/\1/'`
123 gcc_version=`echo ${gcc_version_full} | sed -e 's/\([^ ]*\) .*/\1/'`
124 AC_SUBST(gcc_version)
126 # Calculate toolexeclibdir
127 # Also toolexecdir, though it's only used in toolexeclibdir
128 case ${version_specific_libs} in
130 # Need the gcc compiler version to know where to install libraries
131 # and header files if --enable-version-specific-runtime-libs option
133 toolexecdir='$(libdir)/gcc/$(target_noncanonical)'
134 toolexeclibdir='$(toolexecdir)/'${gcc_version}'$(MULTISUBDIR)'
137 if test -n "$with_cross_host" &&
138 test x"$with_cross_host" != x"no"; then
139 # Install a library built with a cross compiler in tooldir, not libdir.
140 toolexecdir='$(exec_prefix)/$(target_noncanonical)'
141 toolexeclibdir='$(toolexecdir)/lib'
143 toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)'
144 toolexeclibdir='$(libdir)'
146 multi_os_directory=`$CC -print-multi-os-directory`
147 case $multi_os_directory in
148 .) ;; # Avoid trailing /.
149 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
153 AC_SUBST(toolexecdir)
154 AC_SUBST(toolexeclibdir)
156 # Figure out if we want to name the include directory and the
157 # library name changes differently.
158 includedirname=include
162 # Darwin is the only target so far that needs a different include directory.
163 includedirname=include-gnu-runtime
167 AC_SUBST(includedirname)
170 AC_CONFIG_HEADERS(config.h)
178 # We must force CC to /not/ be a precious variable; otherwise
179 # the wrong, non-multilib-adjusted value will be used in multilibs.
180 # As a side effect, we have to subst CFLAGS ourselves.
181 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
182 m4_define([_AC_ARG_VAR_PRECIOUS],[])
184 m4_rename([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
188 AC_CHECK_TOOL(AS, as)
189 AC_CHECK_TOOL(AR, ar)
190 AC_CHECK_TOOL(RANLIB, ranlib, :)
195 # Enable Win32 DLL on MS Windows - FIXME
208 # Sanity check for the cross-compilation case:
209 AC_CHECK_HEADER(stdio.h,:,
210 [AC_MSG_ERROR([Can't find stdio.h.
211 You must have a usable C system for the target already installed, at least
212 including headers and, preferably, the library, before you can configure
213 the Objective C runtime system. If necessary, install gcc now with
214 \`LANGUAGES=c', then the target library, then build with \`LANGUAGES=objc'.])])
218 AC_CHECK_HEADERS(sched.h)
224 # Determine CFLAGS for gthread.
225 # FIXME: the current implementation is dependent on the 'r' variable
226 # passed down from the top level
227 AC_CACHE_CHECK([for gthread cflags],objc_cv_gthread_flags,
228 [if test -f "$r"/gcc/Makefile
230 objc_cv_gthread_flags=`grep \^GTHREAD_FLAGS "$r"/gcc/Makefile | awk -F= '{ print $2 }'`
232 AC_MSG_ERROR([not found])
234 GTHREAD_FLAGS=$objc_cv_gthread_flags
235 AC_SUBST(GTHREAD_FLAGS)
237 AC_MSG_CHECKING([for exception model to use])
239 AC_ARG_ENABLE(sjlj-exceptions,
240 AS_HELP_STRING([--enable-sjlj-exceptions],
241 [force use of builtin_setjmp for exceptions]),
243 [dnl Botheration. Now we've got to detect the exception model.
244 dnl Link tests against libgcc.a are problematic since -- at least
245 dnl as of this writing -- we've not been given proper -L bits for
246 dnl single-tree newlib and libgloss.
248 dnl This is what AC_TRY_COMPILE would do if it didn't delete the
249 dnl conftest files before we got a change to grep them first.
250 cat > conftest.$ac_ext << EOF
251 [#]line __oline__ "configure"
268 dnl work around that we don't have Objective-C support in autoconf
269 CFLAGS="-x objective-c -fgnu-runtime -fobjc-exceptions -S"
270 if AC_TRY_EVAL(ac_compile); then
271 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
272 enable_sjlj_exceptions=yes
273 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
274 enable_sjlj_exceptions=no
279 if test x$enable_sjlj_exceptions = xyes; then
280 AC_DEFINE(SJLJ_EXCEPTIONS, 1,
281 [Define if the compiler is configured for setjmp/longjmp exceptions.])
282 ac_exception_model_name=sjlj
283 elif test x$enable_sjlj_exceptions = xno; then
284 ac_exception_model_name="call frame"
286 AC_MSG_ERROR([unable to detect exception model])
289 AC_MSG_RESULT($ac_exception_model_name)
295 AC_CONFIG_FILES([Makefile])
297 AC_CONFIG_COMMANDS([default],
298 [[if test -n "$CONFIG_FILES"; then
299 if test -n "${with_target_subdir}"; then
300 # FIXME: We shouldn't need to set ac_file
302 LD="${ORIGINAL_LD_FOR_MULTILIBS}"
303 . ${toplevel_srcdir}/config-ml.in
309 with_target_subdir=${with_target_subdir}
310 with_multisubdir=${with_multisubdir}
311 ac_configure_args="--enable-multilib ${ac_configure_args}"
312 toplevel_srcdir=${toplevel_srcdir}
313 CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
314 ORIGINAL_LD_FOR_MULTILIBS="${ORIGINAL_LD_FOR_MULTILIBS}"