1 # Process this file with autoconf to produce a configure script.
2 # Copyright (C) 1994-2015 Free Software Foundation, Inc.
3 # Originally contributed by Dave Love (d.love@dl.ac.uk).
5 #This file is part of GCC.
7 #GCC is free software; you can redistribute it and/or modify
8 #it under the terms of the GNU General Public License as published by
9 #the Free Software Foundation; either version 3, or (at your option)
12 #GCC is distributed in the hope that it will be useful,
13 #but WITHOUT ANY WARRANTY; without even the implied warranty of
14 #MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 #GNU General Public License for more details.
17 #You should have received a copy of the GNU General Public License
18 #along with GCC; see the file COPYING3. If not see
19 #<http://www.gnu.org/licenses/>.
22 AC_INIT(package-unused, version-unused,, libobjc)
23 AC_CONFIG_SRCDIR([objc/objc.h])
26 # We need the following definitions because AC_PROG_LIBTOOL relies on them
28 # Version is pulled out to make it a bit easier to change using sed.
32 # This works around the fact that libtool configuration may change LD
33 # for this particular configuration, but some shells, instead of
34 # keeping the changes in LD private, export them just because LD is
36 ORIGINAL_LD_FOR_MULTILIBS=$LD
42 # We use these options to decide which functions to include.
43 AC_ARG_WITH(target-subdir,
44 [ --with-target-subdir=SUBDIR
45 configuring in a subdirectory])
46 AC_ARG_WITH(cross-host,
47 [ --with-cross-host=HOST configuring with a cross compiler])
49 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
50 AC_ARG_ENABLE(version-specific-runtime-libs,
51 [ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
53 yes) version_specific_libs=yes ;;
54 no) version_specific_libs=no ;;
55 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
57 [version_specific_libs=no])
58 AC_MSG_RESULT($version_specific_libs)
60 AC_ARG_ENABLE(objc-gc,
61 [ --enable-objc-gc enable the use of Boehm's garbage collector with
62 the GNU Objective-C runtime.],
63 [case $enable_objc_gc in
67 OBJC_BOEHM_GC_INCLUDES=''
70 OBJC_GCFLAGS='-DOBJC_WITH_GC=1'
71 OBJC_BOEHM_GC='libobjc_gc$(libsuffix).la'
72 OBJC_BOEHM_GC_INCLUDES='-I$(top_srcdir)/../boehm-gc/include -I../boehm-gc/include'
75 [OBJC_GCFLAGS=''; OBJC_BOEHM_GC=''; OBJC_BOEHM_GC_INCLUDES=''])
76 AC_SUBST(OBJC_GCFLAGS)
77 AC_SUBST(OBJC_BOEHM_GC)
78 AC_SUBST(OBJC_BOEHM_GC_INCLUDES)
84 # Find the rest of the source tree framework.
85 AM_ENABLE_MULTILIB(, ..)
88 ACX_NONCANONICAL_TARGET
90 # Export source directory.
91 # These need to be absolute paths, yet at the same time need to
92 # canonicalize only relative paths, because then amd will not unmount
93 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
95 [\\/$]* | ?:[\\/]*) glibcpp_srcdir=${srcdir} ;;
96 *) glibcpp_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
98 AC_SUBST(glibcpp_srcdir)
100 # Calculate toolexeclibdir
101 # Also toolexecdir, though it's only used in toolexeclibdir
102 case ${version_specific_libs} in
104 # Need the gcc compiler version to know where to install libraries
105 # and header files if --enable-version-specific-runtime-libs option
107 toolexecdir='$(libdir)/gcc/$(target_noncanonical)'
108 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
111 if test -n "$with_cross_host" &&
112 test x"$with_cross_host" != x"no"; then
113 # Install a library built with a cross compiler in tooldir, not libdir.
114 toolexecdir='$(exec_prefix)/$(target_noncanonical)'
115 toolexeclibdir='$(toolexecdir)/lib'
117 toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)'
118 toolexeclibdir='$(libdir)'
120 multi_os_directory=`$CC -print-multi-os-directory`
121 case $multi_os_directory in
122 .) ;; # Avoid trailing /.
123 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
127 AC_SUBST(toolexecdir)
128 AC_SUBST(toolexeclibdir)
130 # Figure out if we want to name the include directory and the
131 # library name changes differently.
132 includedirname=include
136 # Darwin is the only target so far that needs a different include directory.
137 includedirname=include-gnu-runtime
141 AC_SUBST(includedirname)
144 AC_CONFIG_HEADERS(config.h)
152 # We must force CC to /not/ be a precious variable; otherwise
153 # the wrong, non-multilib-adjusted value will be used in multilibs.
154 # As a side effect, we have to subst CFLAGS ourselves.
155 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
156 m4_define([_AC_ARG_VAR_PRECIOUS],[])
158 m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
160 # extra LD Flags which are required for targets
164 # Darwin needs -single_module when linking libobjc
165 extra_ldflags_libobjc='$(lt_host_flags) -Wl,-single_module'
168 # Tell libtool to build DLLs on Windows
169 extra_ldflags_libobjc='$(lt_host_flags)'
172 AC_SUBST(extra_ldflags_libobjc)
176 AC_CHECK_TOOL(AS, as)
177 AC_CHECK_TOOL(AR, ar)
178 AC_CHECK_TOOL(RANLIB, ranlib, :)
183 # Enable Win32 DLL on MS Windows - FIXME
196 # Sanity check for the cross-compilation case:
197 AC_CHECK_HEADER(stdio.h,:,
198 [AC_MSG_ERROR([Can't find stdio.h.
199 You must have a usable C system for the target already installed, at least
200 including headers and, preferably, the library, before you can configure
201 the Objective C runtime system. If necessary, install gcc now with
202 \`LANGUAGES=c', then the target library, then build with \`LANGUAGES=objc'.])])
206 AC_CHECK_HEADERS(sched.h)
212 # Check if we have thread-local storage
215 AC_MSG_CHECKING([for exception model to use])
217 AC_ARG_ENABLE(sjlj-exceptions,
218 AS_HELP_STRING([--enable-sjlj-exceptions],
219 [force use of builtin_setjmp for exceptions]),
221 [dnl Botheration. Now we've got to detect the exception model.
222 dnl Link tests against libgcc.a are problematic since -- at least
223 dnl as of this writing -- we've not been given proper -L bits for
224 dnl single-tree newlib and libgloss.
226 dnl This is what AC_TRY_COMPILE would do if it didn't delete the
227 dnl conftest files before we got a change to grep them first.
228 cat > conftest.$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])