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])
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 $enable_objc_gc in
76 no) OBJC_BOEHM_GC='' ;;
77 *) OBJC_BOEHM_GC=libobjc_gc.la ;;
80 AC_SUBST(OBJC_BOEHM_GC)
86 # When building with srcdir == objdir, links to the source files will
87 # be created in directories within the target_subdir. We have to
88 # adjust toplevel_srcdir accordingly, so that configure finds
89 # install-sh and other auxiliary files that live in the top-level
91 if test "${srcdir}" = "."; then
92 if test -z "${with_target_subdir}"; then
95 if test "${with_target_subdir}" != "."; then
96 toprel="${with_multisrctop}../.."
98 toprel="${with_multisrctop}.."
104 AC_CONFIG_AUX_DIR(${srcdir}/$toprel)
105 toplevel_srcdir=\${srcdir}/$toprel
106 AC_SUBST(toplevel_srcdir)
109 ACX_NONCANONICAL_TARGET
111 # Export source directory.
112 # These need to be absolute paths, yet at the same time need to
113 # canonicalize only relative paths, because then amd will not unmount
114 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
116 [\\/$]* | ?:[\\/]*) glibcpp_srcdir=${srcdir} ;;
117 *) glibcpp_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
119 AC_SUBST(glibcpp_srcdir)
121 TL_AC_GCC_VERSION([$srcdir/..])
123 # Calculate toolexeclibdir
124 # Also toolexecdir, though it's only used in toolexeclibdir
125 case ${version_specific_libs} in
127 # Need the gcc compiler version to know where to install libraries
128 # and header files if --enable-version-specific-runtime-libs option
130 toolexecdir='$(libdir)/gcc/$(target_noncanonical)'
131 toolexeclibdir='$(toolexecdir)/'${gcc_version}'$(MULTISUBDIR)'
134 if test -n "$with_cross_host" &&
135 test x"$with_cross_host" != x"no"; then
136 # Install a library built with a cross compiler in tooldir, not libdir.
137 toolexecdir='$(exec_prefix)/$(target_noncanonical)'
138 toolexeclibdir='$(toolexecdir)/lib'
140 toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)'
141 toolexeclibdir='$(libdir)'
143 multi_os_directory=`$CC -print-multi-os-directory`
144 case $multi_os_directory in
145 .) ;; # Avoid trailing /.
146 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
150 AC_SUBST(toolexecdir)
151 AC_SUBST(toolexeclibdir)
153 # Figure out if we want to name the include directory and the
154 # library name changes differently.
155 includedirname=include
159 # Darwin is the only target so far that needs a different include directory.
160 includedirname=include-gnu-runtime
164 AC_SUBST(includedirname)
167 AC_CONFIG_HEADERS(config.h)
175 # We must force CC to /not/ be a precious variable; otherwise
176 # the wrong, non-multilib-adjusted value will be used in multilibs.
177 # As a side effect, we have to subst CFLAGS ourselves.
178 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
179 m4_define([_AC_ARG_VAR_PRECIOUS],[])
181 m4_rename([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
185 AC_CHECK_TOOL(AS, as)
186 AC_CHECK_TOOL(AR, ar)
187 AC_CHECK_TOOL(RANLIB, ranlib, :)
192 # Enable Win32 DLL on MS Windows - FIXME
205 # Sanity check for the cross-compilation case:
206 AC_CHECK_HEADER(stdio.h,:,
207 [AC_MSG_ERROR([Can't find stdio.h.
208 You must have a usable C system for the target already installed, at least
209 including headers and, preferably, the library, before you can configure
210 the Objective C runtime system. If necessary, install gcc now with
211 \`LANGUAGES=c', then the target library, then build with \`LANGUAGES=objc'.])])
215 AC_CHECK_HEADERS(sched.h)
221 # Determine CFLAGS for gthread.
222 AC_CACHE_CHECK([for gthread cflags],objc_cv_gthread_flags,
223 [# we know we are compiled as a target library, so the toplevel build directory
225 if test -f ../../$host_subdir/gcc/Makefile
227 objc_cv_gthread_flags=`grep \^GTHREAD_FLAGS ../../$host_subdir/gcc/Makefile | awk -F= '{ print $2 }'`
229 AC_MSG_ERROR([not found])
231 GTHREAD_FLAGS=$objc_cv_gthread_flags
232 AC_SUBST(GTHREAD_FLAGS)
234 AC_MSG_CHECKING([for exception model to use])
236 AC_ARG_ENABLE(sjlj-exceptions,
237 AS_HELP_STRING([--enable-sjlj-exceptions],
238 [force use of builtin_setjmp for exceptions]),
240 [dnl Botheration. Now we've got to detect the exception model.
241 dnl Link tests against libgcc.a are problematic since -- at least
242 dnl as of this writing -- we've not been given proper -L bits for
243 dnl single-tree newlib and libgloss.
245 dnl This is what AC_TRY_COMPILE would do if it didn't delete the
246 dnl conftest files before we got a change to grep them first.
247 cat > conftest.$ac_ext << EOF
248 [#]line __oline__ "configure"
265 dnl work around that we don't have Objective-C support in autoconf
266 CFLAGS="-x objective-c -fgnu-runtime -fobjc-exceptions -S"
267 if AC_TRY_EVAL(ac_compile); then
268 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
269 enable_sjlj_exceptions=yes
270 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
271 enable_sjlj_exceptions=no
276 if test x$enable_sjlj_exceptions = xyes; then
277 AC_DEFINE(SJLJ_EXCEPTIONS, 1,
278 [Define if the compiler is configured for setjmp/longjmp exceptions.])
279 ac_exception_model_name=sjlj
280 elif test x$enable_sjlj_exceptions = xno; then
281 ac_exception_model_name="call frame"
283 AC_MSG_ERROR([unable to detect exception model])
286 AC_MSG_RESULT($ac_exception_model_name)
292 AC_CONFIG_FILES([Makefile])
294 AC_CONFIG_COMMANDS([default],
295 [[if test -n "$CONFIG_FILES"; then
296 if test -n "${with_target_subdir}"; then
297 # FIXME: We shouldn't need to set ac_file
299 LD="${ORIGINAL_LD_FOR_MULTILIBS}"
300 . ${toplevel_srcdir}/config-ml.in
306 with_target_subdir=${with_target_subdir}
307 with_multisubdir=${with_multisubdir}
308 ac_configure_args="--enable-multilib ${ac_configure_args}"
309 toplevel_srcdir=${toplevel_srcdir}
310 CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
311 ORIGINAL_LD_FOR_MULTILIBS="${ORIGINAL_LD_FOR_MULTILIBS}"