Makefile.def: Remove reference to boehm-gc target module.
[official-gcc.git] / libobjc / configure.ac
blob0497836a964ee8d880a1c933c144f56234aa7456
1 # Process this file with autoconf to produce a configure script.
2 #   Copyright (C) 1994-2016 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 m4_include([../config/pkg.m4])
23 AC_PREREQ(2.64)
24 AC_INIT(package-unused, version-unused,, libobjc)
25 AC_CONFIG_SRCDIR([objc/objc.h])
26 GCC_TOPLEV_SUBDIRS
28 # We need the following definitions because AC_PROG_LIBTOOL relies on them
29 PACKAGE=libobjc
30 # Version is pulled out to make it a bit easier to change using sed.
31 VERSION=4:0:0
32 AC_SUBST(VERSION)
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
37 # exported.
38 ORIGINAL_LD_FOR_MULTILIBS=$LD
40 # -------
41 # Options
42 # -------
44 # We use these options to decide which functions to include.
45 AC_ARG_WITH(target-subdir,
46 [  --with-target-subdir=SUBDIR
47                            configuring in a subdirectory])
48 AC_ARG_WITH(cross-host,
49 [  --with-cross-host=HOST  configuring with a cross compiler])
51 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
52 AC_ARG_ENABLE(version-specific-runtime-libs,
53 [  --enable-version-specific-runtime-libs    Specify that runtime libraries should be installed in a compiler-specific directory ],
54 [case "$enableval" in
55  yes) version_specific_libs=yes ;;
56  no)  version_specific_libs=no ;;
57  *)   AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
58  esac],
59 [version_specific_libs=no])
60 AC_MSG_RESULT($version_specific_libs)
62 # -----------
63 # Directories
64 # -----------
66 # Find the rest of the source tree framework.
67 AM_ENABLE_MULTILIB(, ..)
69 AC_CANONICAL_SYSTEM
70 ACX_NONCANONICAL_TARGET
72 # Export source directory.
73 # These need to be absolute paths, yet at the same time need to
74 # canonicalize only relative paths, because then amd will not unmount
75 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
76 case $srcdir in
77   [\\/$]* | ?:[\\/]*) glibcpp_srcdir=${srcdir} ;;
78   *) glibcpp_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
79 esac
80 AC_SUBST(glibcpp_srcdir)
82 # Calculate toolexeclibdir
83 # Also toolexecdir, though it's only used in toolexeclibdir
84 case ${version_specific_libs} in
85   yes)
86     # Need the gcc compiler version to know where to install libraries
87     # and header files if --enable-version-specific-runtime-libs option
88     # is selected.
89     toolexecdir='$(libdir)/gcc/$(target_noncanonical)'
90     toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
91     ;;
92   no)
93     if test -n "$with_cross_host" &&
94        test x"$with_cross_host" != x"no"; then
95       # Install a library built with a cross compiler in tooldir, not libdir.
96       toolexecdir='$(exec_prefix)/$(target_noncanonical)'
97       toolexeclibdir='$(toolexecdir)/lib'
98     else
99       toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)'
100       toolexeclibdir='$(libdir)'
101     fi
102     multi_os_directory=`$CC -print-multi-os-directory`
103     case $multi_os_directory in
104       .) ;; # Avoid trailing /.
105       *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
106     esac
107     ;;
108 esac
109 AC_SUBST(toolexecdir)
110 AC_SUBST(toolexeclibdir)
112 # Figure out if we want to name the include directory and the
113 #  library name changes differently.
114 includedirname=include
115 libsuffix=
116 case "${host}" in
117   *-darwin*)
118     # Darwin is the only target so far that needs a different include directory.
119     includedirname=include-gnu-runtime
120     libsuffix=-gnu
121     ;;
122 esac
123 AC_SUBST(includedirname)
124 AC_SUBST(libsuffix)
126 AC_CONFIG_HEADERS(config.h)
128 # --------
129 # Programs
130 # --------
132 GCC_NO_EXECUTABLES
134 # We must force CC to /not/ be a precious variable; otherwise
135 # the wrong, non-multilib-adjusted value will be used in multilibs.
136 # As a side effect, we have to subst CFLAGS ourselves.
137 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
138 m4_define([_AC_ARG_VAR_PRECIOUS],[])
139 AC_PROG_CC
140 m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
142 # extra LD Flags which are required for targets
143 ACX_LT_HOST_FLAGS
144 case "${host}" in
145   *-darwin*)
146     # Darwin needs -single_module when linking libobjc
147     extra_ldflags_libobjc='$(lt_host_flags) -Wl,-single_module'
148     ;;
149   *-cygwin*|*-mingw*)
150     # Tell libtool to build DLLs on Windows
151     extra_ldflags_libobjc='$(lt_host_flags)'
152     ;;
153 esac
154 AC_SUBST(extra_ldflags_libobjc)
156 AC_SUBST(CFLAGS)
158 AC_CHECK_TOOL(AS, as)
159 AC_CHECK_TOOL(AR, ar)
160 AC_CHECK_TOOL(RANLIB, ranlib, :)
161 AC_PROG_INSTALL
163 AM_MAINTAINER_MODE
165 # Enable Win32 DLL on MS Windows - FIXME
166 AC_LIBTOOL_WIN32_DLL
168 AC_PROG_LIBTOOL
170 AM_PROG_CC_C_O
172 AC_PROG_MAKE_SET
174 # -------
175 # Headers
176 # -------
178 # Sanity check for the cross-compilation case:
179 AC_CHECK_HEADER(stdio.h,:,
180   [AC_MSG_ERROR([Can't find stdio.h.
181 You must have a usable C system for the target already installed, at least
182 including headers and, preferably, the library, before you can configure
183 the Objective C runtime system.  If necessary, install gcc now with 
184 \`LANGUAGES=c', then the target library, then build with \`LANGUAGES=objc'.])])
186 AC_HEADER_STDC
188 AC_CHECK_HEADERS(sched.h)
190 # -----------
191 # Miscellanea
192 # -----------
194 # Check if we have thread-local storage
195 GCC_CHECK_TLS
197 gt_BITFIELD_TYPE_MATTERS
199 # -----------
200 # boehm-gc
201 # -----------
203 AC_ARG_ENABLE(objc-gc,
204 [AS_HELP_STRING([--enable-objc-gc],
205                 [enable use of Boehm's garbage collector with the
206                  GNU Objective-C runtime])])
207 AC_ARG_WITH([target-bdw-gc],
208 [AS_HELP_STRING([--with-target-bdw-gc=PATHLIST],
209                 [specify prefix directory for installed bdw-gc package.
210                  Equivalent to --with-target-bdw-gc-include=PATH/include
211                  plus --with-target-bdw-gc-lib=PATH/lib])])
212 AC_ARG_WITH([target-bdw-gc-include],
213 [AS_HELP_STRING([--with-target-bdw-gc-include=PATHLIST],
214                 [specify directories for installed bdw-gc include files])])
215 AC_ARG_WITH([target-bdw-gc-lib],
216 [AS_HELP_STRING([--with-target-bdw-gc-lib=PATHLIST],
217                 [specify directories for installed bdw-gc library])])
218                   
219 case "$enable_objc_gc" in
221   use_bdw_gc=no
222   ;;
224   AC_MSG_CHECKING([for bdw garbage collector])
225   if test "x$with_target_bdw_gc$with_target_bdw_gc_include$with_target_bdw_gc_lib" = x; then
226     dnl no bdw-gw options, fall back to the bdw-gc pkg-config module
227     PKG_CHECK_EXISTS(bdw-gc,
228       AC_MSG_RESULT([using bdw-gc pkg-config module]),
229       AC_MSG_ERROR([no --with-target-bdw-gc options and no bdw-gc pkg-config module found]))
230   else
231     dnl bdw-gw options passed by configure flags
232     if test "x$with_target_bdw_gc_include" = x && test "x$with_target_bdw_gc_lib" != x; then
233       AC_MSG_ERROR([found --with-target-bdw-gc-lib but --with-target-bdw-gc-include missing])
234     elif test "x$with_target_bdw_gc_include" != x && test "x$with_target_bdw_gc_lib" = x; then
235       AC_MSG_ERROR([found --with-target-bdw-gc-include but --with-target-bdw-gc-lib missing])
236     else
237       AC_MSG_RESULT([using paths configured with --with-target-bdw-gc options])
238     fi
239     mldir=`${CC-gcc} --print-multi-directory 2>/dev/null`
240     bdw_val=
241     if test "x$with_target_bdw_gc" != x; then
242       for i in `echo $with_target_bdw_gc | tr ',' ' '`; do
243         case "$i" in
244           *=*) sd=${i%%=*}; d=${i#*=} ;;
245           *) sd=.; d=$i ;;
246         esac
247         if test "$mldir" = "$sd"; then
248           bdw_val=$d
249         fi
250       done
251       if test "x$bdw_val" = x; then
252         AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc])
253       fi
254       bdw_inc_dir="$bdw_val/include"
255       bdw_lib_dir="$bdw_val/lib"
256     fi
257     bdw_val=
258     if test "x$with_target_bdw_gc_include" != x; then
259       for i in `echo $with_target_bdw_gc_include | tr ',' ' '`; do
260         case "$i" in
261           *=*) sd=${i%%=*}; d=${i#*=} ;;
262           *) sd=.; d=$i ;;
263         esac
264         if test "$mldir" = "$sd"; then
265           bdw_val=$d
266         fi
267       done
268       if test "x$bdw_val" = x; then
269         AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc-include])
270       fi
271       bdw_inc_dir="$bdw_val"
272     fi
273     bdw_val=
274     if test "x$with_target_bdw_gc_lib" != x; then
275       for i in `echo $with_target_bdw_gc_lib | tr ',' ' '`; do
276         case "$i" in
277           *=*) sd=${i%%=*}; d=${i#*=} ;;
278           *) sd=.; d=$i ;;
279         esac
280         if test "$mldir" = "$sd"; then
281           bdw_val=$d
282         fi
283       done
284       if test "x$bdw_val" = x; then
285         AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc-lib])
286       fi
287       bdw_lib_dir="$bdw_val"
288     fi
289     if test "x$bdw_inc_dir" = x; then
290       AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc-include])
291     fi
292     if test "x$bdw_lib_dir" = x; then
293       AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc-lib])
294     fi
295     BDW_GC_CFLAGS="-I$bdw_inc_dir"
296     BDW_GC_LIBS="-L$bdw_lib_dir -lgc"
297     AC_MSG_RESULT([found])
298   fi
300   AC_MSG_CHECKING([for system boehm-gc])
301   save_CFLAGS=$CFLAGS
302   save_LIBS=$LIBS
303   CFLAGS="$CFLAGS $BDW_GC_CFLAGS"
304   LIBS="$LIBS $BDW_GC_LIBS"
305   dnl the link test is not good enough for ARM32 multilib detection,
306   dnl first check to link, then to run
307   AC_LINK_IFELSE(
308     [AC_LANG_PROGRAM([#include <gc/gc.h>],[GC_init()])],
309     [
310       AC_RUN_IFELSE([AC_LANG_SOURCE([[
311         #include <gc/gc.h>
312         int main() {
313           GC_init();
314           return 0;
315         }
316         ]])],
317         [system_bdw_gc_found=yes],
318         [system_bdw_gc_found=no],
319         dnl assume no system boehm-gc for cross builds ...
320         [system_bdw_gc_found=no]
321       )
322     ],
323     [system_bdw_gc_found=no])
324   CFLAGS=$save_CFLAGS
325   LIBS=$save_LIBS
326   if test x$enable_objc_gc = xauto && test x$system_bdw_gc_found = xno; then
327     AC_MSG_WARN([system bdw-gc not found, not building libobjc_gc])
328     use_bdw_gc=no
329   elif test x$enable_objc_gc = xyes && test x$system_bdw_gc_found = xno; then
330     AC_MSG_ERROR([system bdw-gc required but not found])
331   else
332     use_bdw_gc=yes
333     AC_MSG_RESULT([found])
334   fi
335 esac
337 if test "$use_bdw_gc" = no; then
338   OBJC_GCFLAGS=''
339   OBJC_BOEHM_GC=''
340   OBJC_BOEHM_GC_INCLUDES=''
341   OBJC_BOEHM_GC_LIBS=''
342 else
343   OBJC_GCFLAGS='-DOBJC_WITH_GC=1'
344   OBJC_BOEHM_GC='libobjc_gc$(libsuffix).la'
345   OBJC_BOEHM_GC_INCLUDES=$BDW_GC_CFLAGS
346   OBJC_BOEHM_GC_LIBS=$BDW_GC_LIBS
348 AC_SUBST(OBJC_GCFLAGS)
349 AC_SUBST(OBJC_BOEHM_GC)
350 AC_SUBST(OBJC_BOEHM_GC_INCLUDES)
351 AC_SUBST(OBJC_BOEHM_GC_LIBS)
353 # ------
354 # Output
355 # ------
357 if test ${multilib} = yes; then
358   multilib_arg="--enable-multilib"
359 else
360   multilib_arg=
363 AC_CONFIG_FILES([Makefile])
364 AC_OUTPUT