2011-05-29 Janus Weil <janus@gcc.gnu.org>
[official-gcc.git] / libgo / configure.ac
blob8a5ffb723a423fbe1cec68f1eb4200911b14a513
1 # configure.ac -- Go library configure script.
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.
7 # Process this file with autoreconf to produce configure.
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)
14 libtool_VERSION=1:0:0
15 AC_SUBST(libtool_VERSION)
17 AM_ENABLE_MULTILIB(, ..)
19 AC_CANONICAL_SYSTEM
20 target_alias=${target_alias-$host_alias}
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])
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])
32 AC_SUBST(CFLAGS)
34 AM_MAINTAINER_MODE
36 AC_PROG_LD
37 AC_PROG_RANLIB
38 AC_CHECK_TOOL(OBJCOPY, objcopy, missing-objcopy)
40 AC_LIBTOOL_DLOPEN
41 AM_PROG_LIBTOOL
42 AC_SUBST(enable_shared)
43 AC_SUBST(enable_static)
45 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
46 AC_SUBST(WARN_FLAGS)
48 dnl FIXME: This should be controlled by --enable-maintainer-mode.
49 WERROR="-Werror"
50 AC_SUBST(WERROR)
52 glibgo_toolexecdir=no
53 glibgo_toolexeclibdir=no
54 glibgo_prefixdir=$prefix
56 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
57 AC_ARG_ENABLE([version-specific-runtime-libs],
58   AC_HELP_STRING([--enable-version-specific-runtime-libs],
59                  [Specify that runtime libraries should be installed in a compiler-specific directory]),
60   [case "$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)
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)'
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/$multi_os_directory ;;
89   esac
92 AC_SUBST(glibgo_prefixdir)
93 AC_SUBST(glibgo_toolexecdir)
94 AC_SUBST(glibgo_toolexeclibdir)
96 # See if the user wants to configure without libffi.  Some
97 # architectures don't support it.  FIXME: We should set a default
98 # based on the host.
99 AC_ARG_WITH(libffi,
100   AS_HELP_STRING([--without-libffi],
101                  [don't use libffi]),
102   [:],
103   [with_libffi=${with_libffi_default-yes}])
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'
112 AC_SUBST(LIBFFI)
113 AC_SUBST(LIBFFIINCS)
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)
138 dnl N.B. Keep in sync with gcc/testsuite/go.test/go-test.exp (go-set-goarch).
139 is_386=no
140 is_alpha=no
141 is_arm=no
142 is_m68k=no
143 mips_abi=unknown
144 is_ppc=no
145 is_ppc64=no
146 is_sparc=no
147 is_sparc64=no
148 is_x86_64=no
149 GOARCH=unknown
150 case ${host} in
151   alpha*-*-*)
152     is_alpha=yes
153     GOARCH=alpha
154     ;;
155   arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
156     is_arm=yes
157     GOARCH=arm
158     ;;
159 changequote(,)dnl
160   i[34567]86-*-* | x86_64-*-*)
161 changequote([,])dnl
162     AC_COMPILE_IFELSE([
163 #ifdef __x86_64__
164 #error 64-bit
165 #endif],
166 [is_386=yes], [is_x86_64=yes])
167     if test "$is_386" = "yes"; then
168       GOARCH=386
169     else
170       GOARCH=amd64
171     fi
172     ;;
173   m68k*-*-*)
174     is_m68k=yes
175     GOARCH=m68k
176     ;;
177   mips*-*-*)
178     AC_COMPILE_IFELSE([
179 #if _MIPS_SIM != _ABIO32
180 #error not o32
181 #endif],
182 [mips_abi="o32"],
183         [AC_COMPILE_IFELSE([
184 #if _MIPS_SIM != _ABIN32
185 #error not n32
186 #endif],
187 [mips_abi="n32"],
188         [AC_COMPILE_IFELSE([
189 #if _MIPS_SIM != _ABI64
190 #error not n64
191 #endif],
192 [mips_abi="n64"],
193         [AC_COMPILE_IFELSE([
194 #if _MIPS_SIM != _ABIO64
195 #error not o64
196 #endif],
197 [mips_abi="o64"],
198         [AC_MSG_ERROR([unknown MIPS ABI])
199 [mips_abi="n32"]])])])])
200     case "$mips_abi" in
201     "o32") GOARCH=mipso32 ;;
202     "n32") GOARCH=mipsn32 ;;
203     "n64") GOARCH=mipsn64 ;;
204     "o64") GOARCH=mipso64 ;;
205     esac
206     ;;
207   rs6000*-*-* | powerpc*-*-*)
208     AC_COMPILE_IFELSE([
209 #ifdef _ARCH_PPC64
210 #error 64-bit
211 #endif],
212 [is_ppc=yes], [is_ppc64=yes])
213     if test "$is_ppc" = "yes"; then
214       GOARCH=ppc
215     else
216       GOARCH=ppc64
217     fi
218     ;;
219   sparc*-*-*)
220     AC_COMPILE_IFELSE([
221 #if defined(__sparcv9) || defined(__arch64__)
222 #error 64-bit
223 #endif],
224 [is_sparc=yes], [is_sparc64=yes])
225     if test "$is_sparc" = "yes"; then
226       GOARCH=sparc
227     else
228       GOARCH=sparc64
229     fi
230     ;;
231 esac
232 AM_CONDITIONAL(LIBGO_IS_386, test $is_386 = yes)
233 AM_CONDITIONAL(LIBGO_IS_ALPHA, test $is_alpha = yes)
234 AM_CONDITIONAL(LIBGO_IS_ARM, test $is_arm = yes)
235 AM_CONDITIONAL(LIBGO_IS_M68K, test $is_m68k = yes)
236 AM_CONDITIONAL(LIBGO_IS_MIPS, test $mips_abi != unknown)
237 AM_CONDITIONAL(LIBGO_IS_MIPSO32, test $mips_abi = o32)
238 AM_CONDITIONAL(LIBGO_IS_MIPSN32, test $mips_abi = n32)
239 AM_CONDITIONAL(LIBGO_IS_MIPSN64, test $mips_abi = n64)
240 AM_CONDITIONAL(LIBGO_IS_MIPSO64, test $mips_abi = o64)
241 AM_CONDITIONAL(LIBGO_IS_PPC, test $is_ppc = yes)
242 AM_CONDITIONAL(LIBGO_IS_PPC64, test $is_ppc64 = yes)
243 AM_CONDITIONAL(LIBGO_IS_SPARC, test $is_sparc = yes)
244 AM_CONDITIONAL(LIBGO_IS_SPARC64, test $is_sparc64 = yes)
245 AM_CONDITIONAL(LIBGO_IS_X86_64, test $is_x86_64 = yes)
246 AC_SUBST(GOARCH)
248 dnl Some files are only present when needed for specific architectures.
249 GO_SYSCALLS_SYSCALL_OS_ARCH_FILE=
250 if test -f ${srcdir}/syscalls/syscall_${GOOS}_${GOARCH}.go; then
251   GO_SYSCALLS_SYSCALL_OS_ARCH_FILE=syscalls/syscall_${GOOS}_${GOARCH}.go
253 AC_SUBST(GO_SYSCALLS_SYSCALL_OS_ARCH_FILE)
255 GO_DEBUG_PROC_REGS_OS_ARCH_FILE=
256 if test -f ${srcdir}/go/debug/proc/regs_${GOOS}_${GOARCH}.go; then
257   GO_DEBUG_PROC_REGS_OS_ARCH_FILE=go/debug/proc/regs_${GOOS}_${GOARCH}.go
259 AC_SUBST(GO_DEBUG_PROC_REGS_OS_ARCH_FILE)
261 dnl Some targets need special flags to build sysinfo.go.
262 case "$target" in
263     mips-sgi-irix6.5*)
264         # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
265         # msghdr in <sys/socket.h>.
266         OSCFLAGS='-D_XOPEN_SOURCE=500'
267         ;;
268     *-*-solaris2.[[89]])
269         # Solaris 8/9 need this so struct msghdr gets the msg_control
270         # etc. fields in <sys/socket.h> (_XPG4_2).
271         OSCFLAGS='-D_XOPEN_SOURCE=500 -D_XOPEN_SOURCE_EXTENDED -D__EXTENSIONS__'
272         ;;
273     *-*-solaris2.1[[01]])
274         # Solaris 10+ needs this so struct msghdr gets the msg_control
275         # etc. fields in <sys/socket.h> (_XPG4_2).  _XOPEN_SOURCE=500 as
276         # above doesn't work with C99.
277         OSCFLAGS='-D_XOPEN_SOURCE=600 -D__EXTENSIONS__'
278         ;;
279 esac
280 AC_SUBST(OSCFLAGS)
282 dnl Use -fsplit-stack when compiling C code if available.
283 AC_CACHE_CHECK([whether -fsplit-stack is supported],
284 [libgo_cv_c_split_stack_supported],
285 [CFLAGS_hold=$CFLAGS
286 CFLAGS="$CFLAGS -fsplit-stack"
287 AC_COMPILE_IFELSE([[int i;]],
288 [libgo_cv_c_split_stack_supported=yes],
289 [libgo_cv_c_split_stack_supported=no])
290 CFLAGS=$CFLAGS_hold])
291 if test "$libgo_cv_c_split_stack_supported" = yes; then
292   SPLIT_STACK=-fsplit-stack
293   AC_DEFINE(USING_SPLIT_STACK, 1,
294                 [Define if the compiler supports -fsplit-stack])
295 else
296   SPLIT_STACK=
298 AC_SUBST(SPLIT_STACK)
299 AM_CONDITIONAL(USING_SPLIT_STACK,
300         test "$libgo_cv_c_split_stack_supported" = yes)
302 dnl Check whether the linker does stack munging when calling from
303 dnl split-stack into non-split-stack code.  We check this by looking
304 dnl at the --help output.  FIXME: This is only half right: it's
305 dnl possible for the linker to support this for some targets but not
306 dnl others.
307 AC_CACHE_CHECK([whether linker supports split stack],
308 [libgo_cv_c_linker_supports_split_stack],
309 libgo_cv_c_linker_supports_split_stack=no
310 if $LD --help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
311   libgo_cv_c_linker_supports_split_stack=yes
313 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
314   AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
315             [Define if the linker support split stack adjustments])
318 dnl Test for the -lm library.
319 MATH_LIBS=
320 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
321 AC_SUBST(MATH_LIBS)
323 dnl Test for -lsocket and -lnsl.  Copied from libjava/configure.ac.
324 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
325   [libgo_cv_lib_sockets=
326    libgo_check_both=no
327    AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
328    if test "$libgo_check_socket" = "yes"; then
329      unset ac_cv_func_connect
330      AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
331                   libgo_check_both=yes)
332    fi
333    if test "$libgo_check_both" = "yes"; then
334      libgo_old_libs=$LIBS
335      LIBS="$LIBS -lsocket -lnsl"
336      unset ac_cv_func_accept
337      AC_CHECK_FUNC(accept,
338                    [libgo_check_nsl=no
339                     libgo_cv_lib_sockets="-lsocket -lnsl"])
340      unset ac_cv_func_accept
341      LIBS=$libgo_old_libs
342    fi
343    unset ac_cv_func_gethostbyname
344    libgo_old_libs="$LIBS"
345    AC_CHECK_FUNC(gethostbyname, ,
346                  [AC_CHECK_LIB(nsl, main,
347                         [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
348    unset ac_cv_func_gethostbyname
349    LIBS=$libgo_old_libs
351 NET_LIBS="$libgo_cv_lib_sockets"
352 AC_SUBST(NET_LIBS)
354 dnl Test whether the compiler supports the -pthread option.
355 AC_CACHE_CHECK([whether -pthread is supported],
356 [libgo_cv_lib_pthread],
357 [CFLAGS_hold=$CFLAGS
358 CFLAGS="$CFLAGS -pthread"
359 AC_COMPILE_IFELSE([[int i;]],
360 [libgo_cv_lib_pthread=yes],
361 [libgo_cv_lib_pthread=no])
362 CFLAGS=$CFLAGS_hold])
363 PTHREAD_CFLAGS=
364 if test "$libgo_cv_lib_pthread" = yes; then
365   PTHREAD_CFLAGS=-pthread
367 AC_SUBST(PTHREAD_CFLAGS)
369 dnl Test for the -lpthread library.
370 PTHREAD_LIBS=
371 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
372 AC_SUBST(PTHREAD_LIBS)
374 dnl Test if -lrt is required for sched_yield.
375 AC_SEARCH_LIBS([sched_yield], [rt])
377 AC_C_BIGENDIAN
379 GCC_CHECK_UNWIND_GETIPINFO
381 AC_ARG_ENABLE(sjlj-exceptions,
382   AC_HELP_STRING([--enable-sjlj-exceptions],
383                  [force use of builtin_setjmp for exceptions]),
384   [case "$enableval" in
385    yes|no|auto) ;;
386    *) AC_MSG_ERROR([unknown argument to --enable-sjlj-exceptions]) ;;
387    esac],
388   [enable_sjlj_exceptions=auto])
390 AC_CACHE_CHECK([whether to use setjmp/longjmp exceptions],
391 [libgo_cv_lib_sjlj_exceptions],
392 [AC_LANG_CONFTEST(
393   [AC_LANG_SOURCE([
394 void bar ();
395 void clean (int *);
396 void foo ()
398   int i __attribute__ ((cleanup (clean)));
399   bar();
401 ])])
402 CFLAGS_hold=$CFLAGS
403 CFLAGS="--save-temps -fexceptions"
404 libgo_cv_lib_sjlj_exceptions=unknown
405 AS_IF([ac_fn_c_try_compile],
406   [if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1; then
407     libgo_cv_lib_sjlj_exceptions=yes
408   elif grep _Unwind_Resume conftest.s >/dev/null 2>&1; then
409     libgo_cv_lib_sjlj_exceptions=no
410   fi])
411 CFLAGS=$CFLAGS_hold
412 rm -f conftest*
415 if test "$enable_sjlj_exceptions" = "auto"; then
416   enable_sjlj_exceptions=$libgo_cv_lib_sjlj_exceptions
419 case $enable_sjlj_exceptions in
420 yes)
421   AC_DEFINE(LIBGO_SJLJ_EXCEPTIONS, 1,
422         [Define if the C++ compiler is configured for setjmp/longjmp exceptions.])
423   ;;
425   ;;
427   AC_MSG_ERROR([unable to detect exception model])
428   ;;
429 esac
431 AC_CHECK_HEADERS(sys/mman.h syscall.h sys/epoll.h sys/ptrace.h sys/syscall.h sys/user.h sys/utsname.h sys/select.h)
432 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
434 AC_CHECK_FUNCS(srandom random strerror_r strsignal wait4 mincore setenv)
435 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
436 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
438 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4],
439 [libgo_cv_func___sync_bool_compare_and_swap_4],
440 [AC_LINK_IFELSE([
441 typedef unsigned int uint32  __attribute__ ((mode (SI)));
442 uint32 i;
443 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
445 [libgo_cv_func___sync_bool_compare_and_swap_4=yes],
446 [libgo_cv_func___sync_bool_compare_and_swap_4=no])])
447 if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then
448   AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1,
449     [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32])
452 AC_CACHE_CHECK([for __sync_fetch_and_add_4],
453 [libgo_cv_func___sync_fetch_and_add_4],
454 [AC_LINK_IFELSE([
455 typedef unsigned int uint32  __attribute__ ((mode (SI)));
456 uint32 i;
457 int main() { return __sync_fetch_and_add (&i, 1); }
459 [libgo_cv_func___sync_fetch_and_add_4=yes],
460 [libgo_cv_func___sync_fetch_and_add_4=no])])
461 if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then
462   AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1,
463     [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32])
466 dnl For x86 we want to use the -minline-all-stringops option to avoid
467 dnl forcing a stack split when calling memcpy and friends.
468 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
469 [libgo_cv_c_stringops],
470 [CFLAGS_hold=$CFLAGS
471 CFLAGS="$CFLAGS -minline-all-stringops"
472 AC_COMPILE_IFELSE([int i;],
473 [libgo_cv_c_stringops=yes],
474 [libgo_cv_c_stringops=no])
475 CFLAGS=$CFLAGS_hold])
476 STRINGOPS_FLAG=
477 if test "$libgo_cv_c_stringops" = yes; then
478   STRINGOPS_FLAG=-minline-all-stringops
480 AC_SUBST(STRINGOPS_FLAG)
482 CFLAGS_hold=$CFLAGS
483 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
484 AC_CHECK_TYPES(off64_t)
485 CFLAGS=$CFLAGS_hold
487 AC_CACHE_SAVE
489 if test ${multilib} = yes; then
490   multilib_arg="--enable-multilib"
491 else
492   multilib_arg=
495 AC_CONFIG_FILES(Makefile testsuite/Makefile)
497 AC_CONFIG_COMMANDS([default],
498 [if test -n "$CONFIG_FILES"; then
499    # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
500    # that multilib installs will end up installed in the correct place.
501    # The testsuite needs it for multilib-aware ABI baseline files.
502    # To work around this not being passed down from config-ml.in ->
503    # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
504    # append it here.  Only modify Makefiles that have just been created.
505    #
506    # Also, get rid of this simulated-VPATH thing that automake does.
507    cat > vpsed << \_EOF
508 s!`test -f '$<' || echo '$(srcdir)/'`!!
509 _EOF
510    for i in $SUBDIRS; do
511     case $CONFIG_FILES in
512      *${i}/Makefile*)
513        #echo "Adding MULTISUBDIR to $i/Makefile"
514        sed -f vpsed $i/Makefile > tmp
515        grep '^MULTISUBDIR =' Makefile >> tmp
516        mv tmp $i/Makefile
517        ;;
518     esac
519    done
520    rm vpsed
521  fi
524 # Variables needed in config.status (file generation) which aren't already
525 # passed by autoconf.
526 SUBDIRS="$SUBDIRS"
529 AC_OUTPUT