1 # Process this file with autoconf to produce a configure script.
2 # Copyright (C) 1994-2019 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/>.
21 AC_INIT(package-unused, version-unused,, libobjc)
22 AC_CONFIG_SRCDIR([objc/objc.h])
25 # We need the following definitions because AC_PROG_LIBTOOL relies on them
27 # Version is pulled out to make it a bit easier to change using sed.
31 # This works around the fact that libtool configuration may change LD
32 # for this particular configuration, but some shells, instead of
33 # keeping the changes in LD private, export them just because LD is
35 ORIGINAL_LD_FOR_MULTILIBS=$LD
41 # We use these options to decide which functions to include.
42 AC_ARG_WITH(target-subdir,
43 [ --with-target-subdir=SUBDIR
44 configuring in a subdirectory])
45 AC_ARG_WITH(cross-host,
46 [ --with-cross-host=HOST configuring with a cross compiler])
48 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
49 AC_ARG_ENABLE(version-specific-runtime-libs,
50 [ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
52 yes) version_specific_libs=yes ;;
53 no) version_specific_libs=no ;;
54 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
56 [version_specific_libs=no])
57 AC_MSG_RESULT($version_specific_libs)
63 # Find the rest of the source tree framework.
64 AM_ENABLE_MULTILIB(, ..)
67 ACX_NONCANONICAL_TARGET
69 # Export source directory.
70 # These need to be absolute paths, yet at the same time need to
71 # canonicalize only relative paths, because then amd will not unmount
72 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
74 [\\/$]* | ?:[\\/]*) glibcpp_srcdir=${srcdir} ;;
75 *) glibcpp_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
77 AC_SUBST(glibcpp_srcdir)
79 # Calculate toolexeclibdir
80 # Also toolexecdir, though it's only used in toolexeclibdir
81 case ${version_specific_libs} in
83 # Need the gcc compiler version to know where to install libraries
84 # and header files if --enable-version-specific-runtime-libs option
86 toolexecdir='$(libdir)/gcc/$(target_noncanonical)'
87 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
90 if test -n "$with_cross_host" &&
91 test x"$with_cross_host" != x"no"; then
92 # Install a library built with a cross compiler in tooldir, not libdir.
93 toolexecdir='$(exec_prefix)/$(target_noncanonical)'
94 toolexeclibdir='$(toolexecdir)/lib'
96 toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)'
97 toolexeclibdir='$(libdir)'
99 multi_os_directory=`$CC -print-multi-os-directory`
100 case $multi_os_directory in
101 .) ;; # Avoid trailing /.
102 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
106 AC_SUBST(toolexecdir)
107 AC_SUBST(toolexeclibdir)
109 # Figure out if we want to name the include directory and the
110 # library name changes differently.
111 includedirname=include
115 # Darwin is the only target so far that needs a different include directory.
116 includedirname=include-gnu-runtime
120 AC_SUBST(includedirname)
123 AC_CONFIG_HEADERS(config.h)
131 # We must force CC to /not/ be a precious variable; otherwise
132 # the wrong, non-multilib-adjusted value will be used in multilibs.
133 # As a side effect, we have to subst CFLAGS ourselves.
134 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
135 m4_define([_AC_ARG_VAR_PRECIOUS],[])
137 m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
139 # extra LD Flags which are required for targets
143 # Darwin needs -single_module when linking libobjc
144 extra_ldflags_libobjc='$(lt_host_flags) -Wl,-single_module'
147 # Tell libtool to build DLLs on Windows
148 extra_ldflags_libobjc='$(lt_host_flags)'
151 AC_SUBST(extra_ldflags_libobjc)
153 # Add CET specific flags if CET is enabled
154 GCC_CET_FLAGS(CET_FLAGS)
155 XCFLAGS="$XCFLAGS $CET_FLAGS"
160 AC_CHECK_TOOL(AS, as)
161 AC_CHECK_TOOL(AR, ar)
162 AC_CHECK_TOOL(RANLIB, ranlib, :)
167 # Enable Win32 DLL on MS Windows - FIXME
180 # Sanity check for the cross-compilation case:
181 AC_CHECK_HEADER(stdio.h,:,
182 [AC_MSG_ERROR([Can't find stdio.h.
183 You must have a usable C system for the target already installed, at least
184 including headers and, preferably, the library, before you can configure
185 the Objective C runtime system. If necessary, install gcc now with
186 \`LANGUAGES=c', then the target library, then build with \`LANGUAGES=objc'.])])
190 AC_CHECK_HEADERS(sched.h)
196 # Check if we have thread-local storage
199 gt_BITFIELD_TYPE_MATTERS
205 AC_ARG_ENABLE(objc-gc,
206 [AS_HELP_STRING([--enable-objc-gc],
207 [enable use of Boehm's garbage collector with the
208 GNU Objective-C runtime])],,enable_objc_gc=no)
209 AC_ARG_WITH([target-bdw-gc],
210 [AS_HELP_STRING([--with-target-bdw-gc=PATHLIST],
211 [specify prefix directory for installed bdw-gc package.
212 Equivalent to --with-target-bdw-gc-include=PATH/include
213 plus --with-target-bdw-gc-lib=PATH/lib])])
214 AC_ARG_WITH([target-bdw-gc-include],
215 [AS_HELP_STRING([--with-target-bdw-gc-include=PATHLIST],
216 [specify directories for installed bdw-gc include files])])
217 AC_ARG_WITH([target-bdw-gc-lib],
218 [AS_HELP_STRING([--with-target-bdw-gc-lib=PATHLIST],
219 [specify directories for installed bdw-gc library])])
221 case "$enable_objc_gc" in
226 AC_MSG_CHECKING([for bdw garbage collector])
227 if test "x$with_target_bdw_gc$with_target_bdw_gc_include$with_target_bdw_gc_lib" = x; then
228 dnl no bdw-gw options, assuming bdw-gc in default locations
232 dnl bdw-gw options passed by configure flags
233 if test "x$with_target_bdw_gc_include" = x && test "x$with_target_bdw_gc_lib" != x; then
234 AC_MSG_ERROR([found --with-target-bdw-gc-lib but --with-target-bdw-gc-include missing])
235 elif test "x$with_target_bdw_gc_include" != x && test "x$with_target_bdw_gc_lib" = x; then
236 AC_MSG_ERROR([found --with-target-bdw-gc-include but --with-target-bdw-gc-lib missing])
238 AC_MSG_RESULT([using paths configured with --with-target-bdw-gc options])
240 mldir=`${CC-gcc} --print-multi-directory 2>/dev/null`
242 if test "x$with_target_bdw_gc" != x; then
243 for i in `echo $with_target_bdw_gc | tr ',' ' '`; do
245 *=*) sd=${i%%=*}; d=${i#*=} ;;
248 if test "$mldir" = "$sd"; then
252 if test "x$bdw_val" = x; then
253 AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc])
255 bdw_inc_dir="$bdw_val/include"
256 bdw_lib_dir="$bdw_val/lib"
259 if test "x$with_target_bdw_gc_include" != x; then
260 for i in `echo $with_target_bdw_gc_include | tr ',' ' '`; do
262 *=*) sd=${i%%=*}; d=${i#*=} ;;
263 *) sd=.; d=$i; fallback=$i ;;
265 if test "$mldir" = "$sd"; then
269 if test "x$bdw_val" = x && test "x$bdw_inc_dir" = x && test "x$fallback" != x; then
270 bdw_inc_dir="$fallback"
271 elif test "x$bdw_val" = x; then
272 AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc-include])
274 bdw_inc_dir="$bdw_val"
278 if test "x$with_target_bdw_gc_lib" != x; then
279 for i in `echo $with_target_bdw_gc_lib | tr ',' ' '`; do
281 *=*) sd=${i%%=*}; d=${i#*=} ;;
284 if test "$mldir" = "$sd"; then
288 if test "x$bdw_val" = x; then
289 AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc-lib])
291 bdw_lib_dir="$bdw_val"
293 if test "x$bdw_inc_dir" = x; then
294 AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc-include])
296 if test "x$bdw_lib_dir" = x; then
297 AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc-lib])
299 BDW_GC_CFLAGS="-I$bdw_inc_dir"
300 if test -f $bdw_lib_dir/libgc.la; then
301 BDW_GC_LIBS="$bdw_lib_dir/libgc.la"
303 BDW_GC_LIBS="-L$bdw_lib_dir -lgc"
305 AC_MSG_RESULT([found])
308 case "$BDW_GC_LIBS" in
313 AC_MSG_CHECKING([for system boehm-gc])
316 CFLAGS="$CFLAGS $BDW_GC_CFLAGS"
317 LIBS="$LIBS $BDW_GC_LIBS"
318 dnl the link test is not good enough for ARM32 multilib detection,
319 dnl first check to link, then to run
321 [AC_LANG_PROGRAM([#include <gc/gc.h>],[GC_init()])],
323 AC_RUN_IFELSE([AC_LANG_SOURCE([[
330 [system_bdw_gc_found=yes],
331 [system_bdw_gc_found=no],
332 dnl assume no system boehm-gc for cross builds ...
333 [system_bdw_gc_found=no]
336 [system_bdw_gc_found=no])
339 if test x$enable_objc_gc = xauto && test x$system_bdw_gc_found = xno; then
340 AC_MSG_WARN([system bdw-gc not found, not building libobjc_gc])
342 elif test x$enable_objc_gc = xyes && test x$system_bdw_gc_found = xno; then
343 AC_MSG_ERROR([system bdw-gc required but not found])
346 AC_MSG_RESULT([found])
351 if test "$use_bdw_gc" = no; then
354 OBJC_BOEHM_GC_INCLUDES=''
355 OBJC_BOEHM_GC_LIBS=''
357 OBJC_GCFLAGS='-DOBJC_WITH_GC=1'
358 OBJC_BOEHM_GC='libobjc_gc$(libsuffix).la'
359 OBJC_BOEHM_GC_INCLUDES=$BDW_GC_CFLAGS
360 OBJC_BOEHM_GC_LIBS=$BDW_GC_LIBS
362 AC_SUBST(OBJC_GCFLAGS)
363 AC_SUBST(OBJC_BOEHM_GC)
364 AC_SUBST(OBJC_BOEHM_GC_INCLUDES)
365 AC_SUBST(OBJC_BOEHM_GC_LIBS)
367 # Determine what GCC version number to use in filesystem paths.
374 if test ${multilib} = yes; then
375 multilib_arg="--enable-multilib"
380 AC_CONFIG_FILES([Makefile])