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libgo: Recognize MIPS ABIs.
[pf3gnuchains/gcc-fork.git] / libgo / configure.ac
1 # configure.ac -- Go library configure script.
2
3 # Copyright 2009 The Go Authors. All rights reserved.
4 # Use of this source code is governed by a BSD-style
5 # license that can be found in the LICENSE file.
6
7 # Process this file with autoreconf to produce configure.
8
9 AC_PREREQ(2.64)
10 AC_INIT(package-unused, version-unused,, libgo)
11 AC_CONFIG_SRCDIR(Makefile.am)
12 AC_CONFIG_HEADER(config.h)
13
14 libtool_VERSION=1:0:0
15 AC_SUBST(libtool_VERSION)
16
17 AM_ENABLE_MULTILIB(, ..)
18
19 AC_CANONICAL_SYSTEM
20 target_alias=${target_alias-$host_alias}
21
22 AM_INIT_AUTOMAKE([1.9.3 no-define foreign -Wall])
23 AH_TEMPLATE(PACKAGE, [Name of package])
24 AH_TEMPLATE(VERSION, [Version number of package])
25
26 m4_rename([_AC_ARG_VAR_PRECIOUS],[glibgo_PRECIOUS])
27 m4_define([_AC_ARG_VAR_PRECIOUS],[])
28 AC_PROG_CC
29 AC_PROG_GO
30 m4_rename_force([glibgo_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
31
32 AC_SUBST(CFLAGS)
33
34 AM_MAINTAINER_MODE
35
36 AC_PROG_LD
37 AC_PROG_RANLIB
38 AC_CHECK_TOOL(OBJCOPY, objcopy, missing-objcopy)
39
40 AC_LIBTOOL_DLOPEN
41 AM_PROG_LIBTOOL
42 AC_SUBST(enable_shared)
43 AC_SUBST(enable_static)
44
45 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
46 AC_SUBST(WARN_FLAGS)
47
48 dnl FIXME: This should be controlled by --enable-maintainer-mode.
49 WERROR="-Werror"
50 AC_SUBST(WERROR)
51
52 glibgo_toolexecdir=no
53 glibgo_toolexeclibdir=no
54 glibgo_prefixdir=$prefix
55
56 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
57 AC_ARG_ENABLE([version-specific-runtime-libs],
58   AC_HELP_STRING([--enable-version-specific-runtime-libs],
59                  [Specify that runtime libraries should be installed in a compiler-specific directory]),
60   [case "$enableval" in
61     yes) version_specific_libs=yes ;;
62     no)  version_specific_libs=no ;;
63     *)   AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
64    esac],
65   [version_specific_libs=no])
66 AC_MSG_RESULT($version_specific_libs)
67
68 # Version-specific runtime libs processing.
69 if test $version_specific_libs = yes; then
70   glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
71   glibgo_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
72 fi
73
74 # Calculate glibgo_toolexecdir, glibgo_toolexeclibdir
75 # Install a library built with a cross compiler in tooldir, not libdir.
76 if test x"$glibgo_toolexecdir" = x"no"; then
77   if test -n "$with_cross_host" &&
78      test x"$with_cross_host" != x"no"; then
79     glibgo_toolexecdir='${exec_prefix}/${host_alias}'
80     glibgo_toolexeclibdir='${toolexecdir}/lib'
81   else
82     glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
83     glibgo_toolexeclibdir='${libdir}'
84   fi
85   multi_os_directory=`$CC -print-multi-os-directory`
86   case $multi_os_directory in
87     .) ;; # Avoid trailing /.
88     *) glibgo_toolexeclibdir=$glibgo_toolexeclibdir/$multi_os_directory ;;
89   esac
90 fi
91
92 AC_SUBST(glibgo_prefixdir)
93 AC_SUBST(glibgo_toolexecdir)
94 AC_SUBST(glibgo_toolexeclibdir)
95
96 # See if the user wants to configure without libffi.  Some
97 # architectures don't support it.  FIXME: We should set a default
98 # based on the host.
99 AC_ARG_WITH(libffi,
100   AS_HELP_STRING([--without-libffi],
101                  [don't use libffi]),
102   [:],
103   [with_libffi=${with_libffi_default-yes}])
104
105 LIBFFI=
106 LIBFFIINCS=
107 if test "$with_libffi" != no; then
108    AC_DEFINE(USE_LIBFFI, 1, [Define if we're to use libffi.])
109    LIBFFI=../libffi/libffi_convenience.la
110    LIBFFIINCS='-I$(top_srcdir)/../libffi/include -I../libffi/include'
111 fi
112 AC_SUBST(LIBFFI)
113 AC_SUBST(LIBFFIINCS)
114
115 is_darwin=no
116 is_freebsd=no
117 is_irix=no
118 is_linux=no
119 is_rtems=no
120 is_solaris=no
121 GOOS=unknown
122 case ${host} in
123   *-*-darwin*)   is_darwin=yes;  GOOS=darwin ;;
124   *-*-freebsd*)  is_freebsd=yes; GOOS=freebsd ;;
125   *-*-irix6*)    is_irix=yes;    GOOS=irix ;;
126   *-*-linux*)    is_linux=yes;   GOOS=linux ;;
127   *-*-rtems*)    is_rtems=yes;   GOOS=rtems ;;
128   *-*-solaris2*) is_solaris=yes; GOOS=solaris ;;
129 esac
130 AM_CONDITIONAL(LIBGO_IS_DARWIN, test $is_darwin = yes)
131 AM_CONDITIONAL(LIBGO_IS_FREEBSD, test $is_freebsd = yes)
132 AM_CONDITIONAL(LIBGO_IS_IRIX, test $is_irix = yes)
133 AM_CONDITIONAL(LIBGO_IS_LINUX, test $is_linux = yes)
134 AM_CONDITIONAL(LIBGO_IS_RTEMS, test $is_rtems = yes)
135 AM_CONDITIONAL(LIBGO_IS_SOLARIS, test $is_solaris = yes)
136 AC_SUBST(GOOS)
137
138 dnl N.B. Keep in sync with gcc/testsuite/go.test/go-test.exp (go-set-goarch).
139 is_386=no
140 is_arm=no
141 is_m68k=no
142 mips_abi=""
143 is_ppc=no
144 is_ppc64=no
145 is_sparc=no
146 is_sparc64=no
147 is_x86_64=no
148 GOARCH=unknown
149 case ${host} in
150   arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
151     is_arm=yes
152     GOARCH=arm
153     ;;
154 changequote(,)dnl
155   i[34567]86-*-* | x86_64-*-*)
156 changequote([,])dnl
157     AC_COMPILE_IFELSE([
158 #ifdef __x86_64__
159 #error 64-bit
160 #endif],
161 [is_386=yes], [is_x86_64=yes])
162     if test "$is_386" = "yes"; then
163       GOARCH=386
164     else
165       GOARCH=amd64
166     fi
167     ;;
168   m68k*-*-*)
169     is_m68k=yes
170     GOARCH=m68k
171     ;;
172   mips*-*-*)
173     AC_COMPILE_IFELSE([
174 #if _MIPS_SIM != _ABIO32
175 #error not o32
176 #endif],
177 [mips_abi="o32"],
178         [AC_COMPILE_IFELSE([
179 #if _MIPS_SIM != _ABIN32
180 #error not n32
181 #endif],
182 [mips_abi="n32"],
183         [AC_COMPILE_IFELSE([
184 #if _MIPS_SIM != _ABI64
185 #error not n64
186 #endif],
187 [mips_abi="n64"],
188         [AC_COMPILE_IFELSE([
189 #if _MIPS_SIM != _ABIO64
190 #error not o64
191 #endif],
192 [mips_abi="o64"],
193         [AC_MSG_ERROR([unknown MIPS ABI])
194 [mips_abi="n32"]])])])])
195     case "$mips_abi" in
196     "o32") GOARCH=mipso32 ;;
197     "n32") GOARCH=mipsn32 ;;
198     "n64") GOARCH=mipsn64 ;;
199     "o64") GOARCH=mipso64 ;;
200     esac
201     ;;
202   rs6000*-*-* | powerpc*-*-*)
203     AC_COMPILE_IFELSE([
204 #ifdef _ARCH_PPC64
205 #error 64-bit
206 #endif],
207 [is_ppc=yes], [is_ppc64=yes])
208     if test "$is_ppc" = "yes"; then
209       GOARCH=ppc
210     else
211       GOARCH=ppc64
212     fi
213     ;;
214   sparc*-*-*)
215     AC_COMPILE_IFELSE([
216 #if defined(__sparcv9) || defined(__arch64__)
217 #error 64-bit
218 #endif],
219 [is_sparc=yes], [is_sparc64=yes])
220     if test "$is_sparc" = "yes"; then
221       GOARCH=sparc
222     else
223       GOARCH=sparc64
224     fi
225     ;;
226 esac
227 AM_CONDITIONAL(LIBGO_IS_386, test $is_386 = yes)
228 AM_CONDITIONAL(LIBGO_IS_ARM, test $is_arm = yes)
229 AM_CONDITIONAL(LIBGO_IS_M68K, test $is_m68k = yes)
230 AM_CONDITIONAL(LIBGO_IS_MIPS, test $mips_abi != "")
231 AM_CONDITIONAL(LIBGO_IS_MIPSO32, test $mips_abi = o32)
232 AM_CONDITIONAL(LIBGO_IS_MIPSN32, test $mips_abi = n32)
233 AM_CONDITIONAL(LIBGO_IS_MIPSN64, test $mips_abi = n64)
234 AM_CONDITIONAL(LIBGO_IS_MIPSO64, test $mips_abi = o64)
235 AM_CONDITIONAL(LIBGO_IS_PPC, test $is_ppc = yes)
236 AM_CONDITIONAL(LIBGO_IS_PPC64, test $is_ppc64 = yes)
237 AM_CONDITIONAL(LIBGO_IS_SPARC, test $is_sparc = yes)
238 AM_CONDITIONAL(LIBGO_IS_SPARC64, test $is_sparc64 = yes)
239 AM_CONDITIONAL(LIBGO_IS_X86_64, test $is_x86_64 = yes)
240 AC_SUBST(GOARCH)
241
242 dnl Some files are only present when needed for specific architectures.
243 GO_SYSCALLS_SYSCALL_OS_ARCH_FILE=
244 if test -f ${srcdir}/syscalls/syscall_${GOOS}_${GOARCH}.go; then
245   GO_SYSCALLS_SYSCALL_OS_ARCH_FILE=syscalls/syscall_${GOOS}_${GOARCH}.go
246 fi
247 AC_SUBST(GO_SYSCALLS_SYSCALL_OS_ARCH_FILE)
248
249 GO_DEBUG_PROC_REGS_OS_ARCH_FILE=
250 if test -f ${srcdir}/go/debug/proc/regs_${GOOS}_${GOARCH}.go; then
251   GO_DEBUG_PROC_REGS_OS_ARCH_FILE=go/debug/proc/regs_${GOOS}_${GOARCH}.go
252 fi
253 AC_SUBST(GO_DEBUG_PROC_REGS_OS_ARCH_FILE)
254
255 dnl Use -fsplit-stack when compiling C code if available.
256 AC_CACHE_CHECK([whether -fsplit-stack is supported],
257 [libgo_cv_c_split_stack_supported],
258 [CFLAGS_hold=$CFLAGS
259 CFLAGS="$CFLAGS -fsplit-stack"
260 AC_COMPILE_IFELSE([[int i;]],
261 [libgo_cv_c_split_stack_supported=yes],
262 [libgo_cv_c_split_stack_supported=no])
263 CFLAGS=$CFLAGS_hold])
264 if test "$libgo_cv_c_split_stack_supported" = yes; then
265   SPLIT_STACK=-fsplit-stack
266   AC_DEFINE(USING_SPLIT_STACK, 1,
267                 [Define if the compiler supports -fsplit-stack])
268 else
269   SPLIT_STACK=
270 fi
271 AC_SUBST(SPLIT_STACK)
272 AM_CONDITIONAL(USING_SPLIT_STACK,
273         test "$libgo_cv_c_split_stack_supported" = yes)
274
275 dnl Check whether the linker does stack munging when calling from
276 dnl split-stack into non-split-stack code.  We check this by looking
277 dnl at the --help output.  FIXME: This is only half right: it's
278 dnl possible for the linker to support this for some targets but not
279 dnl others.
280 AC_CACHE_CHECK([whether linker supports split stack],
281 [libgo_cv_c_linker_supports_split_stack],
282 libgo_cv_c_linker_supports_split_stack=no
283 if $LD --help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
284   libgo_cv_c_linker_supports_split_stack=yes
285 fi)
286 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
287   AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
288             [Define if the linker support split stack adjustments])
289 fi
290
291 dnl Test for the -lm library.
292 MATH_LIBS=
293 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
294 AC_SUBST(MATH_LIBS)
295
296 dnl Test for -lsocket and -lnsl.  Copied from libjava/configure.ac.
297 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
298   [libgo_cv_lib_sockets=
299    libgo_check_both=no
300    AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
301    if test "$libgo_check_socket" = "yes"; then
302      unset ac_cv_func_connect
303      AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
304                   libgo_check_both=yes)
305    fi
306    if test "$libgo_check_both" = "yes"; then
307      libgo_old_libs=$LIBS
308      LIBS="$LIBS -lsocket -lnsl"
309      unset ac_cv_func_accept
310      AC_CHECK_FUNC(accept,
311                    [libgo_check_nsl=no
312                     libgo_cv_lib_sockets="-lsocket -lnsl"])
313      unset ac_cv_func_accept
314      LIBS=$libgo_old_libs
315    fi
316    unset ac_cv_func_gethostbyname
317    libgo_old_libs="$LIBS"
318    AC_CHECK_FUNC(gethostbyname, ,
319                  [AC_CHECK_LIB(nsl, main,
320                         [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
321    unset ac_cv_func_gethostbyname
322    LIBS=$libgo_old_libs
323 ])
324 NET_LIBS="$libgo_cv_lib_sockets"
325 AC_SUBST(NET_LIBS)
326
327 dnl Test whether the compiler supports the -pthread option.
328 AC_CACHE_CHECK([whether -pthread is supported],
329 [libgo_cv_lib_pthread],
330 [CFLAGS_hold=$CFLAGS
331 CFLAGS="$CFLAGS -pthread"
332 AC_COMPILE_IFELSE([[int i;]],
333 [libgo_cv_lib_pthread=yes],
334 [libgo_cv_lib_pthread=no])
335 CFLAGS=$CFLAGS_hold])
336 PTHREAD_CFLAGS=
337 if test "$libgo_cv_lib_pthread" = yes; then
338   PTHREAD_CFLAGS=-pthread
339 fi
340 AC_SUBST(PTHREAD_CFLAGS)
341
342 dnl Test for the -lpthread library.
343 PTHREAD_LIBS=
344 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
345 AC_SUBST(PTHREAD_LIBS)
346
347 dnl Test if -lrt is required for sched_yield.
348 AC_SEARCH_LIBS([sched_yield], [rt])
349
350 AC_C_BIGENDIAN
351
352 GCC_CHECK_UNWIND_GETIPINFO
353
354 AC_ARG_ENABLE(sjlj-exceptions,
355   AC_HELP_STRING([--enable-sjlj-exceptions],
356                  [force use of builtin_setjmp for exceptions]),
357   [case "$enableval" in
358    yes|no|auto) ;;
359    *) AC_MSG_ERROR([unknown argument to --enable-sjlj-exceptions]) ;;
360    esac],
361   [enable_sjlj_exceptions=auto])
362
363 AC_CACHE_CHECK([whether to use setjmp/longjmp exceptions],
364 [libgo_cv_lib_sjlj_exceptions],
365 [AC_LANG_CONFTEST(
366   [AC_LANG_SOURCE([
367 void bar ();
368 void clean (int *);
369 void foo ()
370 {
371   int i __attribute__ ((cleanup (clean)));
372   bar();
373 }
374 ])])
375 CFLAGS_hold=$CFLAGS
376 CFLAGS="--save-temps -fexceptions"
377 libgo_cv_lib_sjlj_exceptions=unknown
378 AS_IF([ac_fn_c_try_compile],
379   [if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1; then
380     libgo_cv_lib_sjlj_exceptions=yes
381   elif grep _Unwind_Resume conftest.s >/dev/null 2>&1; then
382     libgo_cv_lib_sjlj_exceptions=no
383   fi])
384 CFLAGS=$CFLAGS_hold
385 rm -f conftest*
386 ])
387
388 if test "$enable_sjlj_exceptions" = "auto"; then
389   enable_sjlj_exceptions=$libgo_cv_lib_sjlj_exceptions
390 fi
391
392 case $enable_sjlj_exceptions in
393 yes)
394   AC_DEFINE(LIBGO_SJLJ_EXCEPTIONS, 1,
395         [Define if the C++ compiler is configured for setjmp/longjmp exceptions.])
396   ;;
397 no)
398   ;;
399 *)
400   AC_MSG_ERROR([unable to detect exception model])
401   ;;
402 esac
403
404 AC_CHECK_HEADERS(sys/mman.h syscall.h sys/epoll.h sys/ptrace.h sys/syscall.h sys/user.h sys/utsname.h)
405 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
406
407 AC_CHECK_FUNCS(srandom random strerror_r strsignal wait4)
408 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
409 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
410
411 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4],
412 [libgo_cv_func___sync_bool_compare_and_swap_4],
413 [AC_LINK_IFELSE([
414 typedef unsigned int uint32  __attribute__ ((mode (SI)));
415 uint32 i;
416 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
417 ],
418 [libgo_cv_func___sync_bool_compare_and_swap_4=yes],
419 [libgo_cv_func___sync_bool_compare_and_swap_4=no])])
420 if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then
421   AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1,
422     [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32])
423 fi
424
425 AC_CACHE_CHECK([for __sync_fetch_and_add_4],
426 [libgo_cv_func___sync_fetch_and_add_4],
427 [AC_LINK_IFELSE([
428 typedef unsigned int uint32  __attribute__ ((mode (SI)));
429 uint32 i;
430 int main() { return __sync_fetch_and_add (&i, 1); }
431 ],
432 [libgo_cv_func___sync_fetch_and_add_4=yes],
433 [libgo_cv_func___sync_fetch_and_add_4=no])])
434 if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then
435   AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1,
436     [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32])
437 fi
438
439 dnl For x86 we want to use the -minline-all-stringops option to avoid
440 dnl forcing a stack split when calling memcpy and friends.
441 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
442 [libgo_cv_c_stringops],
443 [CFLAGS_hold=$CFLAGS
444 CFLAGS="$CFLAGS -minline-all-stringops"
445 AC_COMPILE_IFELSE([int i;],
446 [libgo_cv_c_stringops=yes],
447 [libgo_cv_c_stringops=no])
448 CFLAGS=$CFLAGS_hold])
449 STRINGOPS_FLAG=
450 if test "$libgo_cv_c_stringops" = yes; then
451   STRINGOPS_FLAG=-minline-all-stringops
452 fi
453 AC_SUBST(STRINGOPS_FLAG)
454
455 CFLAGS_hold=$CFLAGS
456 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
457 AC_CHECK_TYPES(off64_t)
458 CFLAGS=$CFLAGS_hold
459
460 AC_CACHE_SAVE
461
462 if test ${multilib} = yes; then
463   multilib_arg="--enable-multilib"
464 else
465   multilib_arg=
466 fi
467
468 AC_CONFIG_FILES(Makefile testsuite/Makefile)
469
470 AC_CONFIG_COMMANDS([default],
471 [if test -n "$CONFIG_FILES"; then
472    # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
473    # that multilib installs will end up installed in the correct place.
474    # The testsuite needs it for multilib-aware ABI baseline files.
475    # To work around this not being passed down from config-ml.in ->
476    # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
477    # append it here.  Only modify Makefiles that have just been created.
478    #
479    # Also, get rid of this simulated-VPATH thing that automake does.
480    cat > vpsed << \_EOF
481 s!`test -f '$<' || echo '$(srcdir)/'`!!
482 _EOF
483    for i in $SUBDIRS; do
484     case $CONFIG_FILES in
485      *${i}/Makefile*)
486        #echo "Adding MULTISUBDIR to $i/Makefile"
487        sed -f vpsed $i/Makefile > tmp
488        grep '^MULTISUBDIR =' Makefile >> tmp
489        mv tmp $i/Makefile
490        ;;
491     esac
492    done
493    rm vpsed
494  fi
495 ],
496 [
497 # Variables needed in config.status (file generation) which aren't already
498 # passed by autoconf.
499 SUBDIRS="$SUBDIRS"
500 ])
501
502 AC_OUTPUT