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, 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 $enable_objc_gc in
76 no) OBJC_BOEHM_GC='' ;;
77 *) OBJC_BOEHM_GC=libobjc_gc.la ;;
80 AC_SUBST(OBJC_BOEHM_GC)
86 # When building with srcdir == objdir, links to the source files will
87 # be created in directories within the target_subdir. We have to
88 # adjust toplevel_srcdir accordingly, so that configure finds
89 # install-sh and other auxiliary files that live in the top-level
91 if test "${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 # Calculate toolexeclibdir
122 # Also toolexecdir, though it's only used in toolexeclibdir
123 case ${version_specific_libs} in
125 # Need the gcc compiler version to know where to install libraries
126 # and header files if --enable-version-specific-runtime-libs option
128 toolexecdir='$(libdir)/gcc/$(target_noncanonical)'
129 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
132 if test -n "$with_cross_host" &&
133 test x"$with_cross_host" != x"no"; then
134 # Install a library built with a cross compiler in tooldir, not libdir.
135 toolexecdir='$(exec_prefix)/$(target_noncanonical)'
136 toolexeclibdir='$(toolexecdir)/lib'
138 toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)'
139 toolexeclibdir='$(libdir)'
141 multi_os_directory=`$CC -print-multi-os-directory`
142 case $multi_os_directory in
143 .) ;; # Avoid trailing /.
144 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
148 AC_SUBST(toolexecdir)
149 AC_SUBST(toolexeclibdir)
151 # Figure out if we want to name the include directory and the
152 # library name changes differently.
153 includedirname=include
157 # Darwin is the only target so far that needs a different include directory.
158 includedirname=include-gnu-runtime
162 AC_SUBST(includedirname)
165 AC_CONFIG_HEADERS(config.h)
173 # We must force CC to /not/ be a precious variable; otherwise
174 # the wrong, non-multilib-adjusted value will be used in multilibs.
175 # As a side effect, we have to subst CFLAGS ourselves.
176 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
177 m4_define([_AC_ARG_VAR_PRECIOUS],[])
179 m4_rename([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
181 # extra LD Flags which are required for targets
184 # Darwin needs -single_module when linking libobjc
185 extra_ldflags_libobjc=-Wl,-single_module
188 AC_SUBST(extra_ldflags_libobjc)
192 AC_CHECK_TOOL(AS, as)
193 AC_CHECK_TOOL(AR, ar)
194 AC_CHECK_TOOL(RANLIB, ranlib, :)
199 # Enable Win32 DLL on MS Windows - FIXME
212 # Sanity check for the cross-compilation case:
213 AC_CHECK_HEADER(stdio.h,:,
214 [AC_MSG_ERROR([Can't find stdio.h.
215 You must have a usable C system for the target already installed, at least
216 including headers and, preferably, the library, before you can configure
217 the Objective C runtime system. If necessary, install gcc now with
218 \`LANGUAGES=c', then the target library, then build with \`LANGUAGES=objc'.])])
222 AC_CHECK_HEADERS(sched.h)
228 AC_MSG_CHECKING([for thread model used by GCC])
229 target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
230 AC_MSG_RESULT([$target_thread_file])
232 if test $target_thread_file != single; then
233 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
234 [Define if the compiler has a thread header that is non single.])
238 AC_MSG_CHECKING([for exception model to use])
240 AC_ARG_ENABLE(sjlj-exceptions,
241 AS_HELP_STRING([--enable-sjlj-exceptions],
242 [force use of builtin_setjmp for exceptions]),
244 [dnl Botheration. Now we've got to detect the exception model.
245 dnl Link tests against libgcc.a are problematic since -- at least
246 dnl as of this writing -- we've not been given proper -L bits for
247 dnl single-tree newlib and libgloss.
249 dnl This is what AC_TRY_COMPILE would do if it didn't delete the
250 dnl conftest files before we got a change to grep them first.
251 cat > conftest.$ac_ext << EOF
252 [#]line __oline__ "configure"
269 dnl work around that we don't have Objective-C support in autoconf
270 CFLAGS="-x objective-c -fgnu-runtime -fobjc-exceptions -S"
271 if AC_TRY_EVAL(ac_compile); then
272 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
273 enable_sjlj_exceptions=yes
274 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
275 enable_sjlj_exceptions=no
280 if test x$enable_sjlj_exceptions = xyes; then
281 AC_DEFINE(SJLJ_EXCEPTIONS, 1,
282 [Define if the compiler is configured for setjmp/longjmp exceptions.])
283 ac_exception_model_name=sjlj
284 elif test x$enable_sjlj_exceptions = xno; then
285 ac_exception_model_name="call frame"
287 AC_MSG_ERROR([unable to detect exception model])
290 AC_MSG_RESULT($ac_exception_model_name)
296 AC_CONFIG_FILES([Makefile])
298 AC_CONFIG_COMMANDS([default],
299 [[if test -n "$CONFIG_FILES"; then
300 if test -n "${with_target_subdir}"; then
301 # FIXME: We shouldn't need to set ac_file
303 LD="${ORIGINAL_LD_FOR_MULTILIBS}"
304 . ${toplevel_srcdir}/config-ml.in
310 with_target_subdir=${with_target_subdir}
311 with_multisubdir=${with_multisubdir}
312 ac_configure_args="--enable-multilib ${ac_configure_args}"
313 toplevel_srcdir=${toplevel_srcdir}
314 CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
315 ORIGINAL_LD_FOR_MULTILIBS="${ORIGINAL_LD_FOR_MULTILIBS}"