Daily bump.
[official-gcc.git] / libobjc / configure.ac
blobc1104db85f00fc2f8cfbbc6b97a3e1ec8c7e29c1
1 # Process this file with autoconf to produce a configure script.
2 #   Copyright (C) 1994-2021 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)
10 #any later version.
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])
23 GCC_TOPLEV_SUBDIRS
25 # We need the following definitions because AC_PROG_LIBTOOL relies on them
26 PACKAGE=libobjc
27 # Version is pulled out to make it a bit easier to change using sed.
28 VERSION=4:0:0
29 AC_SUBST(VERSION)
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
34 # exported.
35 ORIGINAL_LD_FOR_MULTILIBS=$LD
37 # -------
38 # Options
39 # -------
41 # We use these options to decide which functions to include.
42 AC_ARG_WITH(target-subdir,
43 [  --with-target-subdir=SUBDIR
44                            configuring in a subdirectory])
45 AC_ARG_WITH(cross-host,
46 [  --with-cross-host=HOST  configuring with a cross compiler])
48 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
49 AC_ARG_ENABLE(version-specific-runtime-libs,
50 [  --enable-version-specific-runtime-libs    Specify that runtime libraries should be installed in a compiler-specific directory ],
51 [case "$enableval" in
52  yes) version_specific_libs=yes ;;
53  no)  version_specific_libs=no ;;
54  *)   AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
55  esac],
56 [version_specific_libs=no])
57 AC_MSG_RESULT($version_specific_libs)
59 # -----------
60 # Directories
61 # -----------
63 # Find the rest of the source tree framework.
64 AM_ENABLE_MULTILIB(, ..)
66 AC_CANONICAL_SYSTEM
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.
73 case $srcdir in
74   [\\/$]* | ?:[\\/]*) glibcpp_srcdir=${srcdir} ;;
75   *) glibcpp_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
76 esac
77 AC_SUBST(glibcpp_srcdir)
79 GCC_WITH_TOOLEXECLIBDIR
81 # Calculate toolexeclibdir
82 # Also toolexecdir, though it's only used in toolexeclibdir
83 case ${version_specific_libs} in
84   yes)
85     # Need the gcc compiler version to know where to install libraries
86     # and header files if --enable-version-specific-runtime-libs option
87     # is selected.
88     toolexecdir='$(libdir)/gcc/$(target_noncanonical)'
89     toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
90     ;;
91   no)
92     if test -n "$with_cross_host" &&
93        test x"$with_cross_host" != x"no"; then
94       # Install a library built with a cross compiler in tooldir, not libdir.
95       toolexecdir='$(exec_prefix)/$(target_noncanonical)'
96       case ${with_toolexeclibdir} in
97         no)
98           toolexeclibdir='$(toolexecdir)/lib'
99           ;;
100         *)
101           toolexeclibdir=${with_toolexeclibdir}
102           ;;
103       esac
104     else
105       toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)'
106       toolexeclibdir='$(libdir)'
107     fi
108     multi_os_directory=`$CC -print-multi-os-directory`
109     case $multi_os_directory in
110       .) ;; # Avoid trailing /.
111       *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
112     esac
113     ;;
114 esac
115 AC_SUBST(toolexecdir)
116 AC_SUBST(toolexeclibdir)
118 # Figure out if we want to name the include directory and the
119 #  library name changes differently.
120 includedirname=include
121 libsuffix=
122 case "${host}" in
123   *-darwin*)
124     # Darwin is the only target so far that needs a different include directory.
125     includedirname=include-gnu-runtime
126     libsuffix=-gnu
127     ;;
128 esac
129 AC_SUBST(includedirname)
130 AC_SUBST(libsuffix)
132 AC_CONFIG_HEADERS(config.h)
134 # --------
135 # Programs
136 # --------
138 GCC_NO_EXECUTABLES
140 # We must force CC to /not/ be a precious variable; otherwise
141 # the wrong, non-multilib-adjusted value will be used in multilibs.
142 # As a side effect, we have to subst CFLAGS ourselves.
143 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
144 m4_define([_AC_ARG_VAR_PRECIOUS],[])
145 AC_PROG_CC
146 m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
148 # extra LD Flags which are required for targets
149 ACX_LT_HOST_FLAGS
150 case "${host}" in
151   *-darwin*)
152     # Darwin needs -single_module when linking libobjc
153     extra_ldflags_libobjc='$(lt_host_flags) -Wl,-single_module'
154     ;;
155   *-cygwin*|*-mingw*)
156     # Tell libtool to build DLLs on Windows
157     extra_ldflags_libobjc='$(lt_host_flags)'
158     ;;
159 esac
160 AC_SUBST(extra_ldflags_libobjc)
162 # Add CET specific flags if CET is enabled
163 GCC_CET_FLAGS(CET_FLAGS)
164 XCFLAGS="$XCFLAGS $CET_FLAGS"
166 AC_SUBST(CFLAGS)
167 AC_SUBST(XCFLAGS)
169 AC_CHECK_TOOL(AS, as)
170 AC_CHECK_TOOL(AR, ar)
171 AC_CHECK_TOOL(RANLIB, ranlib, :)
172 AC_PROG_INSTALL
174 AM_MAINTAINER_MODE
176 # Enable Win32 DLL on MS Windows - FIXME
177 AC_LIBTOOL_WIN32_DLL
179 AC_PROG_LIBTOOL
181 AM_PROG_CC_C_O
183 AC_PROG_MAKE_SET
185 # -------
186 # Headers
187 # -------
189 # Sanity check for the cross-compilation case:
190 AC_CHECK_HEADER(stdio.h,:,
191   [AC_MSG_ERROR([Can't find stdio.h.
192 You must have a usable C system for the target already installed, at least
193 including headers and, preferably, the library, before you can configure
194 the Objective C runtime system.  If necessary, install gcc now with 
195 \`LANGUAGES=c', then the target library, then build with \`LANGUAGES=objc'.])])
197 AC_HEADER_STDC
199 AC_CHECK_HEADERS(sched.h)
201 # -----------
202 # Miscellanea
203 # -----------
205 # Check if we have thread-local storage
206 GCC_CHECK_TLS
208 gt_BITFIELD_TYPE_MATTERS
210 # -----------
211 # boehm-gc
212 # -----------
214 AC_ARG_ENABLE(objc-gc,
215 [AS_HELP_STRING([--enable-objc-gc],
216                 [enable use of Boehm's garbage collector with the
217                  GNU Objective-C runtime])],,enable_objc_gc=no)
218 AC_ARG_WITH([target-bdw-gc],
219 [AS_HELP_STRING([--with-target-bdw-gc=PATHLIST],
220                 [specify prefix directory for installed bdw-gc package.
221                  Equivalent to --with-target-bdw-gc-include=PATH/include
222                  plus --with-target-bdw-gc-lib=PATH/lib])])
223 AC_ARG_WITH([target-bdw-gc-include],
224 [AS_HELP_STRING([--with-target-bdw-gc-include=PATHLIST],
225                 [specify directories for installed bdw-gc include files])])
226 AC_ARG_WITH([target-bdw-gc-lib],
227 [AS_HELP_STRING([--with-target-bdw-gc-lib=PATHLIST],
228                 [specify directories for installed bdw-gc library])])
229                   
230 case "$enable_objc_gc" in
232   use_bdw_gc=no
233   ;;
235   AC_MSG_CHECKING([for bdw garbage collector])
236   if test "x$with_target_bdw_gc$with_target_bdw_gc_include$with_target_bdw_gc_lib" = x; then
237     dnl no bdw-gw options, assuming bdw-gc in default locations
238     BDW_GC_CFLAGS=
239     BDW_GC_LIBS="-lgc"
240   else
241     dnl bdw-gw options passed by configure flags
242     if test "x$with_target_bdw_gc_include" = x && test "x$with_target_bdw_gc_lib" != x; then
243       AC_MSG_ERROR([found --with-target-bdw-gc-lib but --with-target-bdw-gc-include missing])
244     elif test "x$with_target_bdw_gc_include" != x && test "x$with_target_bdw_gc_lib" = x; then
245       AC_MSG_ERROR([found --with-target-bdw-gc-include but --with-target-bdw-gc-lib missing])
246     else
247       AC_MSG_RESULT([using paths configured with --with-target-bdw-gc options])
248     fi
249     mldir=`${CC-gcc} --print-multi-directory 2>/dev/null`
250     bdw_val=
251     if test "x$with_target_bdw_gc" != x; then
252       for i in `echo $with_target_bdw_gc | tr ',' ' '`; do
253         case "$i" in
254           *=*) sd=${i%%=*}; d=${i#*=} ;;
255           *) sd=.; d=$i ;;
256         esac
257         if test "$mldir" = "$sd"; then
258           bdw_val=$d
259         fi
260       done
261       if test "x$bdw_val" = x; then
262         AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc])
263       fi
264       bdw_inc_dir="$bdw_val/include"
265       bdw_lib_dir="$bdw_val/lib"
266     fi
267     bdw_val=
268     if test "x$with_target_bdw_gc_include" != x; then
269       for i in `echo $with_target_bdw_gc_include | tr ',' ' '`; do
270         case "$i" in
271           *=*) sd=${i%%=*}; d=${i#*=} ;;
272           *) sd=.; d=$i; fallback=$i ;;
273         esac
274         if test "$mldir" = "$sd"; then
275           bdw_val=$d
276         fi
277       done
278       if test "x$bdw_val" = x && test "x$bdw_inc_dir" = x && test "x$fallback" != x; then
279         bdw_inc_dir="$fallback"
280       elif test "x$bdw_val" = x; then
281         AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc-include])
282       else
283         bdw_inc_dir="$bdw_val"
284       fi
285     fi
286     bdw_val=
287     if test "x$with_target_bdw_gc_lib" != x; then
288       for i in `echo $with_target_bdw_gc_lib | tr ',' ' '`; do
289         case "$i" in
290           *=*) sd=${i%%=*}; d=${i#*=} ;;
291           *) sd=.; d=$i ;;
292         esac
293         if test "$mldir" = "$sd"; then
294           bdw_val=$d
295         fi
296       done
297       if test "x$bdw_val" = x; then
298         AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc-lib])
299       fi
300       bdw_lib_dir="$bdw_val"
301     fi
302     if test "x$bdw_inc_dir" = x; then
303       AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc-include])
304     fi
305     if test "x$bdw_lib_dir" = x; then
306       AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc-lib])
307     fi
308     BDW_GC_CFLAGS="-I$bdw_inc_dir"
309     if test -f $bdw_lib_dir/libgc.la; then
310       BDW_GC_LIBS="$bdw_lib_dir/libgc.la"
311     else
312       BDW_GC_LIBS="-L$bdw_lib_dir -lgc"
313     fi
314     AC_MSG_RESULT([found])
315   fi
317   case "$BDW_GC_LIBS" in
318   *libgc.la)
319     use_bdw_gc=yes
320     ;;
321   *)
322     AC_MSG_CHECKING([for system boehm-gc])
323     save_CFLAGS=$CFLAGS
324     save_LIBS=$LIBS
325     CFLAGS="$CFLAGS $BDW_GC_CFLAGS"
326     LIBS="$LIBS $BDW_GC_LIBS"
327     dnl the link test is not good enough for ARM32 multilib detection,
328     dnl first check to link, then to run
329     AC_LINK_IFELSE(
330       [AC_LANG_PROGRAM([#include <gc/gc.h>],[GC_init()])],
331       [
332         AC_RUN_IFELSE([AC_LANG_SOURCE([[
333           #include <gc/gc.h>
334           int main() {
335             GC_init();
336             return 0;
337           }
338           ]])],
339           [system_bdw_gc_found=yes],
340           [system_bdw_gc_found=no],
341           dnl assume no system boehm-gc for cross builds ...
342           [system_bdw_gc_found=no]
343         )
344       ],
345       [system_bdw_gc_found=no])
346     CFLAGS=$save_CFLAGS
347     LIBS=$save_LIBS
348     if test x$enable_objc_gc = xauto && test x$system_bdw_gc_found = xno; then
349       AC_MSG_WARN([system bdw-gc not found, not building libobjc_gc])
350       use_bdw_gc=no
351     elif test x$enable_objc_gc = xyes && test x$system_bdw_gc_found = xno; then
352       AC_MSG_ERROR([system bdw-gc required but not found])
353     else
354       use_bdw_gc=yes
355       AC_MSG_RESULT([found])
356     fi
357   esac
358 esac
360 if test "$use_bdw_gc" = no; then
361   OBJC_GCFLAGS=''
362   OBJC_BOEHM_GC=''
363   OBJC_BOEHM_GC_INCLUDES=''
364   OBJC_BOEHM_GC_LIBS=''
365 else
366   OBJC_GCFLAGS='-DOBJC_WITH_GC=1'
367   OBJC_BOEHM_GC='libobjc_gc$(libsuffix).la'
368   OBJC_BOEHM_GC_INCLUDES=$BDW_GC_CFLAGS
369   OBJC_BOEHM_GC_LIBS=$BDW_GC_LIBS
371 AC_SUBST(OBJC_GCFLAGS)
372 AC_SUBST(OBJC_BOEHM_GC)
373 AC_SUBST(OBJC_BOEHM_GC_INCLUDES)
374 AC_SUBST(OBJC_BOEHM_GC_LIBS)
376 # Determine what GCC version number to use in filesystem paths.
377 GCC_BASE_VER
379 # ------
380 # Output
381 # ------
383 if test ${multilib} = yes; then
384   multilib_arg="--enable-multilib"
385 else
386   multilib_arg=
389 AC_CONFIG_FILES([Makefile])
390 AC_OUTPUT