Daily bump.
[official-gcc.git] / libobjc / configure.ac
blob3176130c38e427f6a1a0133ba648e9755adb401b
1 # Process this file with autoconf to produce a configure script.
2 #   Copyright (C) 1994-2018 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_PREREQ(2.64)
22 AC_INIT(package-unused, version-unused,, libobjc)
23 AC_CONFIG_SRCDIR([objc/objc.h])
24 GCC_TOPLEV_SUBDIRS
26 # We need the following definitions because AC_PROG_LIBTOOL relies on them
27 PACKAGE=libobjc
28 # Version is pulled out to make it a bit easier to change using sed.
29 VERSION=4:0:0
30 AC_SUBST(VERSION)
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
35 # exported.
36 ORIGINAL_LD_FOR_MULTILIBS=$LD
38 # -------
39 # Options
40 # -------
42 # We use these options to decide which functions to include.
43 AC_ARG_WITH(target-subdir,
44 [  --with-target-subdir=SUBDIR
45                            configuring in a subdirectory])
46 AC_ARG_WITH(cross-host,
47 [  --with-cross-host=HOST  configuring with a cross compiler])
49 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
50 AC_ARG_ENABLE(version-specific-runtime-libs,
51 [  --enable-version-specific-runtime-libs    Specify that runtime libraries should be installed in a compiler-specific directory ],
52 [case "$enableval" in
53  yes) version_specific_libs=yes ;;
54  no)  version_specific_libs=no ;;
55  *)   AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
56  esac],
57 [version_specific_libs=no])
58 AC_MSG_RESULT($version_specific_libs)
60 # -----------
61 # Directories
62 # -----------
64 # Find the rest of the source tree framework.
65 AM_ENABLE_MULTILIB(, ..)
67 AC_CANONICAL_SYSTEM
68 ACX_NONCANONICAL_TARGET
70 # Export source directory.
71 # These need to be absolute paths, yet at the same time need to
72 # canonicalize only relative paths, because then amd will not unmount
73 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
74 case $srcdir in
75   [\\/$]* | ?:[\\/]*) glibcpp_srcdir=${srcdir} ;;
76   *) glibcpp_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
77 esac
78 AC_SUBST(glibcpp_srcdir)
80 # Calculate toolexeclibdir
81 # Also toolexecdir, though it's only used in toolexeclibdir
82 case ${version_specific_libs} in
83   yes)
84     # Need the gcc compiler version to know where to install libraries
85     # and header files if --enable-version-specific-runtime-libs option
86     # is selected.
87     toolexecdir='$(libdir)/gcc/$(target_noncanonical)'
88     toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
89     ;;
90   no)
91     if test -n "$with_cross_host" &&
92        test x"$with_cross_host" != x"no"; then
93       # Install a library built with a cross compiler in tooldir, not libdir.
94       toolexecdir='$(exec_prefix)/$(target_noncanonical)'
95       toolexeclibdir='$(toolexecdir)/lib'
96     else
97       toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)'
98       toolexeclibdir='$(libdir)'
99     fi
100     multi_os_directory=`$CC -print-multi-os-directory`
101     case $multi_os_directory in
102       .) ;; # Avoid trailing /.
103       *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
104     esac
105     ;;
106 esac
107 AC_SUBST(toolexecdir)
108 AC_SUBST(toolexeclibdir)
110 # Figure out if we want to name the include directory and the
111 #  library name changes differently.
112 includedirname=include
113 libsuffix=
114 case "${host}" in
115   *-darwin*)
116     # Darwin is the only target so far that needs a different include directory.
117     includedirname=include-gnu-runtime
118     libsuffix=-gnu
119     ;;
120 esac
121 AC_SUBST(includedirname)
122 AC_SUBST(libsuffix)
124 AC_CONFIG_HEADERS(config.h)
126 # --------
127 # Programs
128 # --------
130 GCC_NO_EXECUTABLES
132 # We must force CC to /not/ be a precious variable; otherwise
133 # the wrong, non-multilib-adjusted value will be used in multilibs.
134 # As a side effect, we have to subst CFLAGS ourselves.
135 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
136 m4_define([_AC_ARG_VAR_PRECIOUS],[])
137 AC_PROG_CC
138 m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
140 # extra LD Flags which are required for targets
141 ACX_LT_HOST_FLAGS
142 case "${host}" in
143   *-darwin*)
144     # Darwin needs -single_module when linking libobjc
145     extra_ldflags_libobjc='$(lt_host_flags) -Wl,-single_module'
146     ;;
147   *-cygwin*|*-mingw*)
148     # Tell libtool to build DLLs on Windows
149     extra_ldflags_libobjc='$(lt_host_flags)'
150     ;;
151 esac
152 AC_SUBST(extra_ldflags_libobjc)
154 # Add CET specific flags if CET is enabled
155 GCC_CET_FLAGS(CET_FLAGS)
156 XCFLAGS="$XCFLAGS $CET_FLAGS"
158 AC_SUBST(CFLAGS)
159 AC_SUBST(XCFLAGS)
161 AC_CHECK_TOOL(AS, as)
162 AC_CHECK_TOOL(AR, ar)
163 AC_CHECK_TOOL(RANLIB, ranlib, :)
164 AC_PROG_INSTALL
166 AM_MAINTAINER_MODE
168 # Enable Win32 DLL on MS Windows - FIXME
169 AC_LIBTOOL_WIN32_DLL
171 AC_PROG_LIBTOOL
173 AM_PROG_CC_C_O
175 AC_PROG_MAKE_SET
177 # -------
178 # Headers
179 # -------
181 # Sanity check for the cross-compilation case:
182 AC_CHECK_HEADER(stdio.h,:,
183   [AC_MSG_ERROR([Can't find stdio.h.
184 You must have a usable C system for the target already installed, at least
185 including headers and, preferably, the library, before you can configure
186 the Objective C runtime system.  If necessary, install gcc now with 
187 \`LANGUAGES=c', then the target library, then build with \`LANGUAGES=objc'.])])
189 AC_HEADER_STDC
191 AC_CHECK_HEADERS(sched.h)
193 # -----------
194 # Miscellanea
195 # -----------
197 # Check if we have thread-local storage
198 GCC_CHECK_TLS
200 gt_BITFIELD_TYPE_MATTERS
202 # -----------
203 # boehm-gc
204 # -----------
206 AC_ARG_ENABLE(objc-gc,
207 [AS_HELP_STRING([--enable-objc-gc],
208                 [enable use of Boehm's garbage collector with the
209                  GNU Objective-C runtime])],,enable_objc_gc=no)
210 AC_ARG_WITH([target-bdw-gc],
211 [AS_HELP_STRING([--with-target-bdw-gc=PATHLIST],
212                 [specify prefix directory for installed bdw-gc package.
213                  Equivalent to --with-target-bdw-gc-include=PATH/include
214                  plus --with-target-bdw-gc-lib=PATH/lib])])
215 AC_ARG_WITH([target-bdw-gc-include],
216 [AS_HELP_STRING([--with-target-bdw-gc-include=PATHLIST],
217                 [specify directories for installed bdw-gc include files])])
218 AC_ARG_WITH([target-bdw-gc-lib],
219 [AS_HELP_STRING([--with-target-bdw-gc-lib=PATHLIST],
220                 [specify directories for installed bdw-gc library])])
221                   
222 case "$enable_objc_gc" in
224   use_bdw_gc=no
225   ;;
227   AC_MSG_CHECKING([for bdw garbage collector])
228   if test "x$with_target_bdw_gc$with_target_bdw_gc_include$with_target_bdw_gc_lib" = x; then
229     dnl no bdw-gw options, assuming bdw-gc in default locations
230     BDW_GC_CFLAGS=
231     BDW_GC_LIBS="-lgc"
232   else
233     dnl bdw-gw options passed by configure flags
234     if test "x$with_target_bdw_gc_include" = x && test "x$with_target_bdw_gc_lib" != x; then
235       AC_MSG_ERROR([found --with-target-bdw-gc-lib but --with-target-bdw-gc-include missing])
236     elif test "x$with_target_bdw_gc_include" != x && test "x$with_target_bdw_gc_lib" = x; then
237       AC_MSG_ERROR([found --with-target-bdw-gc-include but --with-target-bdw-gc-lib missing])
238     else
239       AC_MSG_RESULT([using paths configured with --with-target-bdw-gc options])
240     fi
241     mldir=`${CC-gcc} --print-multi-directory 2>/dev/null`
242     bdw_val=
243     if test "x$with_target_bdw_gc" != x; then
244       for i in `echo $with_target_bdw_gc | tr ',' ' '`; do
245         case "$i" in
246           *=*) sd=${i%%=*}; d=${i#*=} ;;
247           *) sd=.; d=$i ;;
248         esac
249         if test "$mldir" = "$sd"; then
250           bdw_val=$d
251         fi
252       done
253       if test "x$bdw_val" = x; then
254         AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc])
255       fi
256       bdw_inc_dir="$bdw_val/include"
257       bdw_lib_dir="$bdw_val/lib"
258     fi
259     bdw_val=
260     if test "x$with_target_bdw_gc_include" != x; then
261       for i in `echo $with_target_bdw_gc_include | tr ',' ' '`; do
262         case "$i" in
263           *=*) sd=${i%%=*}; d=${i#*=} ;;
264           *) sd=.; d=$i; fallback=$i ;;
265         esac
266         if test "$mldir" = "$sd"; then
267           bdw_val=$d
268         fi
269       done
270       if test "x$bdw_val" = x && test "x$bdw_inc_dir" = x && test "x$fallback" != x; then
271         bdw_inc_dir="$fallback"
272       elif test "x$bdw_val" = x; then
273         AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc-include])
274       else
275         bdw_inc_dir="$bdw_val"
276       fi
277     fi
278     bdw_val=
279     if test "x$with_target_bdw_gc_lib" != x; then
280       for i in `echo $with_target_bdw_gc_lib | tr ',' ' '`; do
281         case "$i" in
282           *=*) sd=${i%%=*}; d=${i#*=} ;;
283           *) sd=.; d=$i ;;
284         esac
285         if test "$mldir" = "$sd"; then
286           bdw_val=$d
287         fi
288       done
289       if test "x$bdw_val" = x; then
290         AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc-lib])
291       fi
292       bdw_lib_dir="$bdw_val"
293     fi
294     if test "x$bdw_inc_dir" = x; then
295       AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc-include])
296     fi
297     if test "x$bdw_lib_dir" = x; then
298       AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc-lib])
299     fi
300     BDW_GC_CFLAGS="-I$bdw_inc_dir"
301     if test -f $bdw_lib_dir/libgc.la; then
302       BDW_GC_LIBS="$bdw_lib_dir/libgc.la"
303     else
304       BDW_GC_LIBS="-L$bdw_lib_dir -lgc"
305     fi
306     AC_MSG_RESULT([found])
307   fi
309   case "$BDW_GC_LIBS" in
310   *libgc.la)
311     use_bdw_gc=yes
312     ;;
313   *)
314     AC_MSG_CHECKING([for system boehm-gc])
315     save_CFLAGS=$CFLAGS
316     save_LIBS=$LIBS
317     CFLAGS="$CFLAGS $BDW_GC_CFLAGS"
318     LIBS="$LIBS $BDW_GC_LIBS"
319     dnl the link test is not good enough for ARM32 multilib detection,
320     dnl first check to link, then to run
321     AC_LINK_IFELSE(
322       [AC_LANG_PROGRAM([#include <gc/gc.h>],[GC_init()])],
323       [
324         AC_RUN_IFELSE([AC_LANG_SOURCE([[
325           #include <gc/gc.h>
326           int main() {
327             GC_init();
328             return 0;
329           }
330           ]])],
331           [system_bdw_gc_found=yes],
332           [system_bdw_gc_found=no],
333           dnl assume no system boehm-gc for cross builds ...
334           [system_bdw_gc_found=no]
335         )
336       ],
337       [system_bdw_gc_found=no])
338     CFLAGS=$save_CFLAGS
339     LIBS=$save_LIBS
340     if test x$enable_objc_gc = xauto && test x$system_bdw_gc_found = xno; then
341       AC_MSG_WARN([system bdw-gc not found, not building libobjc_gc])
342       use_bdw_gc=no
343     elif test x$enable_objc_gc = xyes && test x$system_bdw_gc_found = xno; then
344       AC_MSG_ERROR([system bdw-gc required but not found])
345     else
346       use_bdw_gc=yes
347       AC_MSG_RESULT([found])
348     fi
349   esac
350 esac
352 if test "$use_bdw_gc" = no; then
353   OBJC_GCFLAGS=''
354   OBJC_BOEHM_GC=''
355   OBJC_BOEHM_GC_INCLUDES=''
356   OBJC_BOEHM_GC_LIBS=''
357 else
358   OBJC_GCFLAGS='-DOBJC_WITH_GC=1'
359   OBJC_BOEHM_GC='libobjc_gc$(libsuffix).la'
360   OBJC_BOEHM_GC_INCLUDES=$BDW_GC_CFLAGS
361   OBJC_BOEHM_GC_LIBS=$BDW_GC_LIBS
363 AC_SUBST(OBJC_GCFLAGS)
364 AC_SUBST(OBJC_BOEHM_GC)
365 AC_SUBST(OBJC_BOEHM_GC_INCLUDES)
366 AC_SUBST(OBJC_BOEHM_GC_LIBS)
368 # Determine what GCC version number to use in filesystem paths.
369 GCC_BASE_VER
371 # ------
372 # Output
373 # ------
375 if test ${multilib} = yes; then
376   multilib_arg="--enable-multilib"
377 else
378   multilib_arg=
381 AC_CONFIG_FILES([Makefile])
382 AC_OUTPUT