[Ada] Streamline comparison for equality of 2-element arrays
[official-gcc.git] / libobjc / configure.ac
bloba5c082c49cdf6041e589a289882504659d399db3
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)
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 # Calculate toolexeclibdir
80 # Also toolexecdir, though it's only used in toolexeclibdir
81 case ${version_specific_libs} in
82   yes)
83     # Need the gcc compiler version to know where to install libraries
84     # and header files if --enable-version-specific-runtime-libs option
85     # is selected.
86     toolexecdir='$(libdir)/gcc/$(target_noncanonical)'
87     toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
88     ;;
89   no)
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='$(toolexecdir)/lib'
95     else
96       toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)'
97       toolexeclibdir='$(libdir)'
98     fi
99     multi_os_directory=`$CC -print-multi-os-directory`
100     case $multi_os_directory in
101       .) ;; # Avoid trailing /.
102       *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
103     esac
104     ;;
105 esac
106 AC_SUBST(toolexecdir)
107 AC_SUBST(toolexeclibdir)
109 # Figure out if we want to name the include directory and the
110 #  library name changes differently.
111 includedirname=include
112 libsuffix=
113 case "${host}" in
114   *-darwin*)
115     # Darwin is the only target so far that needs a different include directory.
116     includedirname=include-gnu-runtime
117     libsuffix=-gnu
118     ;;
119 esac
120 AC_SUBST(includedirname)
121 AC_SUBST(libsuffix)
123 AC_CONFIG_HEADERS(config.h)
125 # --------
126 # Programs
127 # --------
129 GCC_NO_EXECUTABLES
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],[])
136 AC_PROG_CC
137 m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
139 # extra LD Flags which are required for targets
140 ACX_LT_HOST_FLAGS
141 case "${host}" in
142   *-darwin*)
143     # Darwin needs -single_module when linking libobjc
144     extra_ldflags_libobjc='$(lt_host_flags) -Wl,-single_module'
145     ;;
146   *-cygwin*|*-mingw*)
147     # Tell libtool to build DLLs on Windows
148     extra_ldflags_libobjc='$(lt_host_flags)'
149     ;;
150 esac
151 AC_SUBST(extra_ldflags_libobjc)
153 # Add CET specific flags if CET is enabled
154 GCC_CET_FLAGS(CET_FLAGS)
155 XCFLAGS="$XCFLAGS $CET_FLAGS"
157 AC_SUBST(CFLAGS)
158 AC_SUBST(XCFLAGS)
160 AC_CHECK_TOOL(AS, as)
161 AC_CHECK_TOOL(AR, ar)
162 AC_CHECK_TOOL(RANLIB, ranlib, :)
163 AC_PROG_INSTALL
165 AM_MAINTAINER_MODE
167 # Enable Win32 DLL on MS Windows - FIXME
168 AC_LIBTOOL_WIN32_DLL
170 AC_PROG_LIBTOOL
172 AM_PROG_CC_C_O
174 AC_PROG_MAKE_SET
176 # -------
177 # Headers
178 # -------
180 # Sanity check for the cross-compilation case:
181 AC_CHECK_HEADER(stdio.h,:,
182   [AC_MSG_ERROR([Can't find stdio.h.
183 You must have a usable C system for the target already installed, at least
184 including headers and, preferably, the library, before you can configure
185 the Objective C runtime system.  If necessary, install gcc now with 
186 \`LANGUAGES=c', then the target library, then build with \`LANGUAGES=objc'.])])
188 AC_HEADER_STDC
190 AC_CHECK_HEADERS(sched.h)
192 # -----------
193 # Miscellanea
194 # -----------
196 # Check if we have thread-local storage
197 GCC_CHECK_TLS
199 gt_BITFIELD_TYPE_MATTERS
201 # -----------
202 # boehm-gc
203 # -----------
205 AC_ARG_ENABLE(objc-gc,
206 [AS_HELP_STRING([--enable-objc-gc],
207                 [enable use of Boehm's garbage collector with the
208                  GNU Objective-C runtime])],,enable_objc_gc=no)
209 AC_ARG_WITH([target-bdw-gc],
210 [AS_HELP_STRING([--with-target-bdw-gc=PATHLIST],
211                 [specify prefix directory for installed bdw-gc package.
212                  Equivalent to --with-target-bdw-gc-include=PATH/include
213                  plus --with-target-bdw-gc-lib=PATH/lib])])
214 AC_ARG_WITH([target-bdw-gc-include],
215 [AS_HELP_STRING([--with-target-bdw-gc-include=PATHLIST],
216                 [specify directories for installed bdw-gc include files])])
217 AC_ARG_WITH([target-bdw-gc-lib],
218 [AS_HELP_STRING([--with-target-bdw-gc-lib=PATHLIST],
219                 [specify directories for installed bdw-gc library])])
220                   
221 case "$enable_objc_gc" in
223   use_bdw_gc=no
224   ;;
226   AC_MSG_CHECKING([for bdw garbage collector])
227   if test "x$with_target_bdw_gc$with_target_bdw_gc_include$with_target_bdw_gc_lib" = x; then
228     dnl no bdw-gw options, assuming bdw-gc in default locations
229     BDW_GC_CFLAGS=
230     BDW_GC_LIBS="-lgc"
231   else
232     dnl bdw-gw options passed by configure flags
233     if test "x$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$with_target_bdw_gc_lib" = x; then
236       AC_MSG_ERROR([found --with-target-bdw-gc-include but --with-target-bdw-gc-lib missing])
237     else
238       AC_MSG_RESULT([using paths configured with --with-target-bdw-gc options])
239     fi
240     mldir=`${CC-gcc} --print-multi-directory 2>/dev/null`
241     bdw_val=
242     if test "x$with_target_bdw_gc" != x; then
243       for i in `echo $with_target_bdw_gc | tr ',' ' '`; do
244         case "$i" in
245           *=*) sd=${i%%=*}; d=${i#*=} ;;
246           *) sd=.; d=$i ;;
247         esac
248         if test "$mldir" = "$sd"; then
249           bdw_val=$d
250         fi
251       done
252       if test "x$bdw_val" = x; then
253         AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc])
254       fi
255       bdw_inc_dir="$bdw_val/include"
256       bdw_lib_dir="$bdw_val/lib"
257     fi
258     bdw_val=
259     if test "x$with_target_bdw_gc_include" != x; then
260       for i in `echo $with_target_bdw_gc_include | tr ',' ' '`; do
261         case "$i" in
262           *=*) sd=${i%%=*}; d=${i#*=} ;;
263           *) sd=.; d=$i; fallback=$i ;;
264         esac
265         if test "$mldir" = "$sd"; then
266           bdw_val=$d
267         fi
268       done
269       if test "x$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 ($mldir) found in --with-target-bdw-gc-include])
273       else
274         bdw_inc_dir="$bdw_val"
275       fi
276     fi
277     bdw_val=
278     if test "x$with_target_bdw_gc_lib" != x; then
279       for i in `echo $with_target_bdw_gc_lib | tr ',' ' '`; do
280         case "$i" in
281           *=*) sd=${i%%=*}; d=${i#*=} ;;
282           *) sd=.; d=$i ;;
283         esac
284         if test "$mldir" = "$sd"; then
285           bdw_val=$d
286         fi
287       done
288       if test "x$bdw_val" = x; then
289         AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc-lib])
290       fi
291       bdw_lib_dir="$bdw_val"
292     fi
293     if test "x$bdw_inc_dir" = x; then
294       AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc-include])
295     fi
296     if test "x$bdw_lib_dir" = x; then
297       AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc-lib])
298     fi
299     BDW_GC_CFLAGS="-I$bdw_inc_dir"
300     if test -f $bdw_lib_dir/libgc.la; then
301       BDW_GC_LIBS="$bdw_lib_dir/libgc.la"
302     else
303       BDW_GC_LIBS="-L$bdw_lib_dir -lgc"
304     fi
305     AC_MSG_RESULT([found])
306   fi
308   case "$BDW_GC_LIBS" in
309   *libgc.la)
310     use_bdw_gc=yes
311     ;;
312   *)
313     AC_MSG_CHECKING([for system boehm-gc])
314     save_CFLAGS=$CFLAGS
315     save_LIBS=$LIBS
316     CFLAGS="$CFLAGS $BDW_GC_CFLAGS"
317     LIBS="$LIBS $BDW_GC_LIBS"
318     dnl the link test is not good enough for ARM32 multilib detection,
319     dnl first check to link, then to run
320     AC_LINK_IFELSE(
321       [AC_LANG_PROGRAM([#include <gc/gc.h>],[GC_init()])],
322       [
323         AC_RUN_IFELSE([AC_LANG_SOURCE([[
324           #include <gc/gc.h>
325           int main() {
326             GC_init();
327             return 0;
328           }
329           ]])],
330           [system_bdw_gc_found=yes],
331           [system_bdw_gc_found=no],
332           dnl assume no system boehm-gc for cross builds ...
333           [system_bdw_gc_found=no]
334         )
335       ],
336       [system_bdw_gc_found=no])
337     CFLAGS=$save_CFLAGS
338     LIBS=$save_LIBS
339     if test x$enable_objc_gc = xauto && test x$system_bdw_gc_found = xno; then
340       AC_MSG_WARN([system bdw-gc not found, not building libobjc_gc])
341       use_bdw_gc=no
342     elif test x$enable_objc_gc = xyes && test x$system_bdw_gc_found = xno; then
343       AC_MSG_ERROR([system bdw-gc required but not found])
344     else
345       use_bdw_gc=yes
346       AC_MSG_RESULT([found])
347     fi
348   esac
349 esac
351 if test "$use_bdw_gc" = no; then
352   OBJC_GCFLAGS=''
353   OBJC_BOEHM_GC=''
354   OBJC_BOEHM_GC_INCLUDES=''
355   OBJC_BOEHM_GC_LIBS=''
356 else
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.
368 GCC_BASE_VER
370 # ------
371 # Output
372 # ------
374 if test ${multilib} = yes; then
375   multilib_arg="--enable-multilib"
376 else
377   multilib_arg=
380 AC_CONFIG_FILES([Makefile])
381 AC_OUTPUT