Merge trunk version 194962 into gupc branch.
[official-gcc.git] / libgo / configure.ac
blob8cde50ba0c150e045645a672e97fea09fbdc9872
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=3:1:0
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 no-dist -Wall -Wno-portability])
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 CC_FOR_BUILD=${CC_FOR_BUILD:-gcc}
46 AC_SUBST(CC_FOR_BUILD)
48 AC_PROG_AWK
50 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
51 AC_SUBST(WARN_FLAGS)
53 dnl FIXME: This should be controlled by --enable-maintainer-mode.
54 WERROR="-Werror"
55 AC_SUBST(WERROR)
57 glibgo_toolexecdir=no
58 glibgo_toolexeclibdir=no
60 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
61 AC_ARG_ENABLE([version-specific-runtime-libs],
62   AC_HELP_STRING([--enable-version-specific-runtime-libs],
63                  [Specify that runtime libraries should be installed in a compiler-specific directory]),
64   [case "$enableval" in
65     yes) version_specific_libs=yes ;;
66     no)  version_specific_libs=no ;;
67     *)   AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
68    esac],
69   [version_specific_libs=no])
70 AC_MSG_RESULT($version_specific_libs)
72 # Version-specific runtime libs processing.
73 if test $version_specific_libs = yes; then
74   glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
75   glibgo_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
78 # Calculate glibgo_toolexecdir, glibgo_toolexeclibdir
79 # Install a library built with a cross compiler in tooldir, not libdir.
80 if test -n "$with_cross_host" &&
81    test x"$with_cross_host" != x"no"; then
82   nover_glibgo_toolexecdir='${exec_prefix}/${host_alias}'
83   nover_glibgo_toolexeclibdir='${toolexecdir}/lib'
84 else
85   nover_glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
86   nover_glibgo_toolexeclibdir='${libdir}'
88 multi_os_directory=`$CC -print-multi-os-directory`
89 case $multi_os_directory in
90   .) ;; # Avoid trailing /.
91   *) nover_glibgo_toolexeclibdir=${nover_glibgo_toolexeclibdir}/${multi_os_directory} ;;
92 esac
94 if test x"$glibgo_toolexecdir" = x"no"; then
95   glibgo_toolexecdir="${nover_glibgo_toolexecdir}"
96   glibgo_toolexeclibdir="${nover_glibgo_toolexeclibdir}"
99 AC_SUBST(glibgo_toolexecdir)
100 AC_SUBST(glibgo_toolexeclibdir)
101 AC_SUBST(nover_glibgo_toolexeclibdir)
103 # See if the user wants to configure without libffi.  Some
104 # architectures don't support it.  FIXME: We should set a default
105 # based on the host.
106 AC_ARG_WITH(libffi,
107   AS_HELP_STRING([--without-libffi],
108                  [don't use libffi]),
109   [:],
110   [with_libffi=${with_libffi_default-yes}])
112 LIBFFI=
113 LIBFFIINCS=
114 if test "$with_libffi" != no; then
115    AC_DEFINE(USE_LIBFFI, 1, [Define if we're to use libffi.])
116    LIBFFI=../libffi/libffi_convenience.la
117    LIBFFIINCS='-I$(top_srcdir)/../libffi/include -I../libffi/include'
119 AC_SUBST(LIBFFI)
120 AC_SUBST(LIBFFIINCS)
122 # Used to tell GNU make to include a file without telling automake to
123 # include it.
124 go_include="-include"
125 AC_SUBST(go_include)
127 is_darwin=no
128 is_freebsd=no
129 is_irix=no
130 is_linux=no
131 is_netbsd=no
132 is_openbsd=no
133 is_rtems=no
134 is_solaris=no
135 GOOS=unknown
136 case ${host} in
137   *-*-darwin*)   is_darwin=yes;  GOOS=darwin ;;
138   *-*-freebsd*)  is_freebsd=yes; GOOS=freebsd ;;
139   *-*-irix6*)    is_irix=yes;    GOOS=irix ;;
140   *-*-linux*)    is_linux=yes;   GOOS=linux ;;
141   *-*-netbsd*)   is_netbsd=yes;  GOOS=netbsd ;;
142   *-*-openbsd*)  is_openbsd=yes; GOOS=openbsd ;;
143   *-*-rtems*)    is_rtems=yes;   GOOS=rtems ;;
144   *-*-solaris2*) is_solaris=yes; GOOS=solaris ;;
145 esac
146 AM_CONDITIONAL(LIBGO_IS_DARWIN, test $is_darwin = yes)
147 AM_CONDITIONAL(LIBGO_IS_FREEBSD, test $is_freebsd = yes)
148 AM_CONDITIONAL(LIBGO_IS_IRIX, test $is_irix = yes)
149 AM_CONDITIONAL(LIBGO_IS_LINUX, test $is_linux = yes)
150 AM_CONDITIONAL(LIBGO_IS_NETBSD, test $is_netbsd = yes)
151 AM_CONDITIONAL(LIBGO_IS_OPENBSD, test $is_openbsd = yes)
152 AM_CONDITIONAL(LIBGO_IS_RTEMS, test $is_rtems = yes)
153 AM_CONDITIONAL(LIBGO_IS_SOLARIS, test $is_solaris = yes)
154 AC_SUBST(GOOS)
156 dnl N.B. Keep in sync with gcc/testsuite/go.test/go-test.exp (go-set-goarch).
157 is_386=no
158 is_alpha=no
159 is_arm=no
160 is_m68k=no
161 mips_abi=unknown
162 is_ppc=no
163 is_ppc64=no
164 is_sparc=no
165 is_sparc64=no
166 is_x86_64=no
167 GOARCH=unknown
168 case ${host} in
169   alpha*-*-*)
170     is_alpha=yes
171     GOARCH=alpha
172     ;;
173   arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
174     is_arm=yes
175     GOARCH=arm
176     ;;
177 changequote(,)dnl
178   i[34567]86-*-* | x86_64-*-*)
179 changequote([,])dnl
180     AC_COMPILE_IFELSE([
181 #ifdef __x86_64__
182 #error 64-bit
183 #endif],
184 [is_386=yes], [is_x86_64=yes])
185     if test "$is_386" = "yes"; then
186       GOARCH=386
187     else
188       GOARCH=amd64
189     fi
190     ;;
191   m68k*-*-*)
192     is_m68k=yes
193     GOARCH=m68k
194     ;;
195   mips*-*-*)
196     AC_COMPILE_IFELSE([
197 #if _MIPS_SIM != _ABIO32
198 #error not o32
199 #endif],
200 [mips_abi="o32"],
201         [AC_COMPILE_IFELSE([
202 #if _MIPS_SIM != _ABIN32
203 #error not n32
204 #endif],
205 [mips_abi="n32"],
206         [AC_COMPILE_IFELSE([
207 #if _MIPS_SIM != _ABI64
208 #error not n64
209 #endif],
210 [mips_abi="n64"],
211         [AC_COMPILE_IFELSE([
212 #if _MIPS_SIM != _ABIO64
213 #error not o64
214 #endif],
215 [mips_abi="o64"],
216         [AC_MSG_ERROR([unknown MIPS ABI])
217 [mips_abi="n32"]])])])])
218     case "$mips_abi" in
219     "o32") GOARCH=mipso32 ;;
220     "n32") GOARCH=mipsn32 ;;
221     "n64") GOARCH=mipsn64 ;;
222     "o64") GOARCH=mipso64 ;;
223     esac
224     ;;
225   rs6000*-*-* | powerpc*-*-*)
226     AC_COMPILE_IFELSE([
227 #ifdef _ARCH_PPC64
228 #error 64-bit
229 #endif],
230 [is_ppc=yes], [is_ppc64=yes])
231     if test "$is_ppc" = "yes"; then
232       GOARCH=ppc
233     else
234       GOARCH=ppc64
235     fi
236     ;;
237   sparc*-*-*)
238     AC_COMPILE_IFELSE([
239 #if defined(__sparcv9) || defined(__arch64__)
240 #error 64-bit
241 #endif],
242 [is_sparc=yes], [is_sparc64=yes])
243     if test "$is_sparc" = "yes"; then
244       GOARCH=sparc
245     else
246       GOARCH=sparc64
247     fi
248     ;;
249 esac
250 AM_CONDITIONAL(LIBGO_IS_386, test $is_386 = yes)
251 AM_CONDITIONAL(LIBGO_IS_ALPHA, test $is_alpha = yes)
252 AM_CONDITIONAL(LIBGO_IS_ARM, test $is_arm = yes)
253 AM_CONDITIONAL(LIBGO_IS_M68K, test $is_m68k = yes)
254 AM_CONDITIONAL(LIBGO_IS_MIPS, test $mips_abi != unknown)
255 AM_CONDITIONAL(LIBGO_IS_MIPSO32, test $mips_abi = o32)
256 AM_CONDITIONAL(LIBGO_IS_MIPSN32, test $mips_abi = n32)
257 AM_CONDITIONAL(LIBGO_IS_MIPSN64, test $mips_abi = n64)
258 AM_CONDITIONAL(LIBGO_IS_MIPSO64, test $mips_abi = o64)
259 AM_CONDITIONAL(LIBGO_IS_PPC, test $is_ppc = yes)
260 AM_CONDITIONAL(LIBGO_IS_PPC64, test $is_ppc64 = yes)
261 AM_CONDITIONAL(LIBGO_IS_SPARC, test $is_sparc = yes)
262 AM_CONDITIONAL(LIBGO_IS_SPARC64, test $is_sparc64 = yes)
263 AM_CONDITIONAL(LIBGO_IS_X86_64, test $is_x86_64 = yes)
264 AC_SUBST(GOARCH)
266 dnl Some files are only present when needed for specific architectures.
267 GO_LIBCALL_OS_FILE=
268 GO_LIBCALL_OS_ARCH_FILE=
269 GO_SYSCALL_OS_FILE=
270 GO_SYSCALL_OS_ARCH_FILE=
271 if test -f ${srcdir}/go/syscall/libcall_${GOOS}.go; then
272   GO_LIBCALL_OS_FILE=go/syscall/libcall_${GOOS}.go
274 if test -f ${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go; then
275   GO_LIBCALL_OS_ARCH_FILE=go/syscall/libcall_${GOOS}_${GOARCH}.go
277 if test -f ${srcdir}/go/syscall/syscall_${GOOS}.go; then
278   GO_SYSCALL_OS_FILE=go/syscall/syscall_${GOOS}.go
280 if test -f ${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go; then
281   GO_SYSCALL_OS_ARCH_FILE=go/syscall/syscall_${GOOS}_${GOARCH}.go
283 AC_SUBST(GO_LIBCALL_OS_FILE)
284 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
285 AC_SUBST(GO_SYSCALL_OS_FILE)
286 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
288 dnl Special flags used to generate sysinfo.go.
289 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
290 case "$target" in
291     mips-sgi-irix6.5*)
292         # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
293         # msghdr in <sys/socket.h>.
294         OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
295         ;;
296     *-*-solaris2.[[89]])
297         # Solaris 8/9 need this so struct msghdr gets the msg_control
298         # etc. fields in <sys/socket.h> (_XPG4_2).
299         OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500 -D_XOPEN_SOURCE_EXTENDED -D__EXTENSIONS__"
300         ;;
301     *-*-solaris2.1[[01]])
302         # Solaris 10+ needs this so struct msghdr gets the msg_control
303         # etc. fields in <sys/socket.h> (_XPG4_2).  _XOPEN_SOURCE=600 as
304         # above doesn't work with C99.
305         OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
306         ;;
307 esac
308 AC_SUBST(OSCFLAGS)
310 dnl Use -fsplit-stack when compiling C code if available.
311 AC_CACHE_CHECK([whether -fsplit-stack is supported],
312 [libgo_cv_c_split_stack_supported],
313 [CFLAGS_hold=$CFLAGS
314 CFLAGS="$CFLAGS -fsplit-stack"
315 AC_COMPILE_IFELSE([[int i;]],
316 [libgo_cv_c_split_stack_supported=yes],
317 [libgo_cv_c_split_stack_supported=no])
318 CFLAGS=$CFLAGS_hold])
319 if test "$libgo_cv_c_split_stack_supported" = yes; then
320   SPLIT_STACK=-fsplit-stack
321   AC_DEFINE(USING_SPLIT_STACK, 1,
322                 [Define if the compiler supports -fsplit-stack])
323 else
324   SPLIT_STACK=
326 AC_SUBST(SPLIT_STACK)
327 AM_CONDITIONAL(USING_SPLIT_STACK,
328         test "$libgo_cv_c_split_stack_supported" = yes)
330 dnl Check whether the linker does stack munging when calling from
331 dnl split-stack into non-split-stack code.  We check this by looking
332 dnl at the --help output.  FIXME: This is only half right: it's
333 dnl possible for the linker to support this for some targets but not
334 dnl others.
335 AC_CACHE_CHECK([whether linker supports split stack],
336 [libgo_cv_c_linker_supports_split_stack],
337 libgo_cv_c_linker_supports_split_stack=no
338 if $LD --help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
339   libgo_cv_c_linker_supports_split_stack=yes
341 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
342   AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
343             [Define if the linker support split stack adjustments])
346 dnl Test for the -lm library.
347 MATH_LIBS=
348 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
349 AC_SUBST(MATH_LIBS)
351 dnl Test for -lsocket and -lnsl.  Copied from libjava/configure.ac.
352 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
353   [libgo_cv_lib_sockets=
354    libgo_check_both=no
355    AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
356    if test "$libgo_check_socket" = "yes"; then
357      unset ac_cv_func_connect
358      AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
359                   libgo_check_both=yes)
360    fi
361    if test "$libgo_check_both" = "yes"; then
362      libgo_old_libs=$LIBS
363      LIBS="$LIBS -lsocket -lnsl"
364      unset ac_cv_func_accept
365      AC_CHECK_FUNC(accept,
366                    [libgo_check_nsl=no
367                     libgo_cv_lib_sockets="-lsocket -lnsl"])
368      unset ac_cv_func_accept
369      LIBS=$libgo_old_libs
370    fi
371    unset ac_cv_func_gethostbyname
372    libgo_old_libs="$LIBS"
373    AC_CHECK_FUNC(gethostbyname, ,
374                  [AC_CHECK_LIB(nsl, main,
375                         [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
376    unset ac_cv_func_gethostbyname
377    LIBS=$libgo_old_libs
379 NET_LIBS="$libgo_cv_lib_sockets"
380 AC_SUBST(NET_LIBS)
382 dnl Test whether the compiler supports the -pthread option.
383 AC_CACHE_CHECK([whether -pthread is supported],
384 [libgo_cv_lib_pthread],
385 [CFLAGS_hold=$CFLAGS
386 CFLAGS="$CFLAGS -pthread"
387 AC_COMPILE_IFELSE([[int i;]],
388 [libgo_cv_lib_pthread=yes],
389 [libgo_cv_lib_pthread=no])
390 CFLAGS=$CFLAGS_hold])
391 PTHREAD_CFLAGS=
392 if test "$libgo_cv_lib_pthread" = yes; then
393   PTHREAD_CFLAGS=-pthread
395 AC_SUBST(PTHREAD_CFLAGS)
397 dnl Test for the -lpthread library.
398 PTHREAD_LIBS=
399 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
400 AC_SUBST(PTHREAD_LIBS)
402 dnl Test if -lrt is required for sched_yield.
403 AC_SEARCH_LIBS([sched_yield], [rt])
405 AC_C_BIGENDIAN
407 GCC_CHECK_UNWIND_GETIPINFO
409 AC_ARG_ENABLE(sjlj-exceptions,
410   AC_HELP_STRING([--enable-sjlj-exceptions],
411                  [force use of builtin_setjmp for exceptions]),
412   [case "$enableval" in
413    yes|no|auto) ;;
414    *) AC_MSG_ERROR([unknown argument to --enable-sjlj-exceptions]) ;;
415    esac],
416   [enable_sjlj_exceptions=auto])
418 AC_CACHE_CHECK([whether to use setjmp/longjmp exceptions],
419 [libgo_cv_lib_sjlj_exceptions],
420 [AC_LANG_CONFTEST(
421   [AC_LANG_SOURCE([
422 void bar ();
423 void clean (int *);
424 void foo ()
426   int i __attribute__ ((cleanup (clean)));
427   bar();
429 ])])
430 CFLAGS_hold=$CFLAGS
431 CFLAGS="--save-temps -fexceptions"
432 libgo_cv_lib_sjlj_exceptions=unknown
433 AS_IF([ac_fn_c_try_compile],
434   [if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1; then
435     libgo_cv_lib_sjlj_exceptions=yes
436   elif grep _Unwind_Resume conftest.s >/dev/null 2>&1; then
437     libgo_cv_lib_sjlj_exceptions=no
438   fi])
439 CFLAGS=$CFLAGS_hold
440 rm -f conftest*
443 if test "$enable_sjlj_exceptions" = "auto"; then
444   enable_sjlj_exceptions=$libgo_cv_lib_sjlj_exceptions
447 case $enable_sjlj_exceptions in
448 yes)
449   AC_DEFINE(LIBGO_SJLJ_EXCEPTIONS, 1,
450         [Define if the C++ compiler is configured for setjmp/longjmp exceptions.])
451   ;;
453   ;;
455   AC_MSG_ERROR([unable to detect exception model])
456   ;;
457 esac
459 AC_CHECK_HEADERS(sys/file.h sys/mman.h syscall.h sys/epoll.h sys/inotify.h sys/ptrace.h sys/syscall.h sys/user.h sys/utsname.h sys/select.h sys/socket.h net/if.h net/if_arp.h net/route.h netpacket/packet.h sys/prctl.h sys/mount.h sys/vfs.h sys/statfs.h sys/timex.h sys/sysinfo.h utime.h linux/ether.h linux/fs.h linux/reboot.h netinet/in_syst.h netinet/ip.h netinet/ip_mroute.h netinet/if_ether.h)
461 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
462 [#ifdef HAVE_SYS_SOCKET_H
463 #include <sys/socket.h>
464 #endif
467 AC_CACHE_CHECK([whether <ustat.h> can be used],
468 [libgo_cv_c_ustat_h],
469 [CFLAGS_hold=$CFLAGS
470 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE $OSCFLAGS"
471 AC_COMPILE_IFELSE(
472 [AC_LANG_SOURCE([
473 #include <sys/types.h>
474 #ifdef HAVE_LINUX_FILTER_H
475 #include <linux/filter.h>
476 #endif
477 #include <ustat.h>
478 ])], [libgo_cv_c_ustat_h=yes], [libgo_cv_c_ustat_h=no])
479 CFLAGS=$CFLAGS_hold])
480 if test $libgo_cv_c_ustat_h = yes; then
481   AC_DEFINE(HAVE_USTAT_H, 1,
482     [Define to 1 if you have the <ustat.h> header file and it works.])
485 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
487 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv dl_iterate_phdr)
488 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
489 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
491 AC_CHECK_FUNCS(epoll_create1 faccessat fallocate fchmodat fchownat futimesat inotify_add_watch inotify_init inotify_init1 inotify_rm_watch mkdirat mknodat openat renameat sync_file_range splice tee unlinkat unshare)
492 AC_TYPE_OFF_T
493 AC_CHECK_TYPES([loff_t])
495 LIBS_hold="$LIBS"
496 LIBS="$LIBS -lm"
497 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
498 LIBS="$LIBS_hold"
500 CFLAGS_hold="$CFLAGS"
501 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
502 LIBS_hold="$LIBS"
503 LIBS="$LIBS $PTHREAD_LIBS"
504 AC_CHECK_FUNCS(sem_timedwait)
505 CFLAGS="$CFLAGS_hold"
506 LIBS="$LIBS_hold"
508 LIBS_hold="$LIBS"
509 LIBS="$LIBS $MATH_LIBS"
510 AC_CHECK_FUNCS(matherr)
511 LIBS="$LIBS_hold"
513 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4],
514 [libgo_cv_func___sync_bool_compare_and_swap_4],
515 [AC_LINK_IFELSE([
516 typedef unsigned int uint32  __attribute__ ((mode (SI)));
517 uint32 i;
518 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
520 [libgo_cv_func___sync_bool_compare_and_swap_4=yes],
521 [libgo_cv_func___sync_bool_compare_and_swap_4=no])])
522 if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then
523   AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1,
524     [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32])
527 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_8],
528 [libgo_cv_func___sync_bool_compare_and_swap_8],
529 [AC_LINK_IFELSE([
530 typedef unsigned int uint64  __attribute__ ((mode (DI)));
531 uint64 i;
532 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
534 [libgo_cv_func___sync_bool_compare_and_swap_8=yes],
535 [libgo_cv_func___sync_bool_compare_and_swap_8=no])])
536 if test "$libgo_cv_func___sync_bool_compare_and_swap_8" = "yes"; then
537   AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_8, 1,
538     [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint64])
541 AC_CACHE_CHECK([for __sync_fetch_and_add_4],
542 [libgo_cv_func___sync_fetch_and_add_4],
543 [AC_LINK_IFELSE([
544 typedef unsigned int uint32  __attribute__ ((mode (SI)));
545 uint32 i;
546 int main() { return __sync_fetch_and_add (&i, 1); }
548 [libgo_cv_func___sync_fetch_and_add_4=yes],
549 [libgo_cv_func___sync_fetch_and_add_4=no])])
550 if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then
551   AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1,
552     [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32])
555 AC_CACHE_CHECK([for __sync_add_and_fetch_8],
556 [libgo_cv_func___sync_add_and_fetch_8],
557 [AC_LINK_IFELSE([
558 typedef unsigned int uint64  __attribute__ ((mode (DI)));
559 uint64 i;
560 int main() { return __sync_add_and_fetch (&i, 1); }
562 [libgo_cv_func___sync_add_and_fetch_8=yes],
563 [libgo_cv_func___sync_add_and_fetch_8=no])])
564 if test "$libgo_cv_func___sync_add_and_fetch_8" = "yes"; then
565   AC_DEFINE(HAVE_SYNC_ADD_AND_FETCH_8, 1,
566     [Define to 1 if the compiler provides the __sync_add_and_fetch function for uint64])
569 dnl For x86 we want to use the -minline-all-stringops option to avoid
570 dnl forcing a stack split when calling memcpy and friends.
571 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
572 [libgo_cv_c_stringops],
573 [CFLAGS_hold=$CFLAGS
574 CFLAGS="$CFLAGS -minline-all-stringops"
575 AC_COMPILE_IFELSE([int i;],
576 [libgo_cv_c_stringops=yes],
577 [libgo_cv_c_stringops=no])
578 CFLAGS=$CFLAGS_hold])
579 STRINGOPS_FLAG=
580 if test "$libgo_cv_c_stringops" = yes; then
581   STRINGOPS_FLAG=-minline-all-stringops
583 AC_SUBST(STRINGOPS_FLAG)
585 dnl For x86 we want to compile the math library with -mfancy-math-387
586 dnl -funsafe-math-optimizations so that we can use the builtin
587 dnl instructions directly.
588 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
589 [libgo_cv_c_fancymath],
590 [CFLAGS_hold=$CFLAGS
591 CFLAGS="$CFLAGS -mfancy-math-387"
592 AC_COMPILE_IFELSE([int i;],
593 [libgo_cv_c_fancymath=yes],
594 [libgo_cv_c_fancymath=no])
595 CFLAGS=$CFLAGS_hold])
596 MATH_FLAG=
597 if test "$libgo_cv_c_fancymath" = yes; then
598   MATH_FLAG="-mfancy-math-387 -funsafe-math-optimizations"
600 AC_SUBST(MATH_FLAG)
602 CFLAGS_hold=$CFLAGS
603 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
604 AC_CHECK_TYPES([off64_t])
605 CFLAGS=$CFLAGS_hold
607 dnl Work out the size of the epoll_events struct on GNU/Linux.
608 AC_CACHE_CHECK([epoll_event size],
609 [libgo_cv_c_epoll_event_size],
610 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
611 [sizeof (struct epoll_event)],
612 [#include <sys/epoll.h>],
613 [libgo_cv_c_epoll_event_size=0])])
614 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
615 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
617 dnl Work out the offset of the fd field in the epoll_events struct on
618 dnl GNU/Linux.
619 AC_CACHE_CHECK([epoll_event data.fd offset],
620 [libgo_cv_c_epoll_event_fd_offset],
621 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
622 [offsetof (struct epoll_event, data.fd)],
623 [#include <stddef.h>
624 #include <sys/epoll.h>],
625 [libgo_cv_c_epoll_event_fd_offset=0])])
626 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
627 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
629 dnl See if struct exception is defined in <math.h>.
630 AC_CHECK_TYPE([struct exception],
631 [libgo_has_struct_exception=yes],
632 [libgo_has_struct_exception=no],
633 [#include <math.h>])
634 if test "$libgo_has_struct_exception" = "yes"; then
635   AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
636             [Define to 1 if <math.h> defines struct exception])
639 dnl Check if makecontext expects the uc_stack member of ucontext to point
640 dnl to the top of the stack.
641 case "$target" in
642   sparc*-*-solaris2.[[89]]*)
643     libgo_cv_lib_makecontext_stack_top=yes
644     ;;
645   *)
646     libgo_cv_lib_makecontext_stack_top=no
647     ;;
648 esac
649 if test "$libgo_cv_lib_makecontext_stack_top" = "yes"; then
650   AC_DEFINE(MAKECONTEXT_STACK_TOP, 1,
651             [Define if makecontext expects top of stack in uc_stack.])
654 dnl See whether setcontext changes the value of TLS variables.
655 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
656 [libgo_cv_lib_setcontext_clobbers_tls],
657 [CFLAGS_hold="$CFLAGS"
658 CFLAGS="$PTHREAD_CFLAGS"
659 LIBS_hold="$LIBS"
660 LIBS="$LIBS $PTHREAD_LIBS"
661 AC_CHECK_SIZEOF([void *])
662 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
663 AC_RUN_IFELSE(
664   [AC_LANG_SOURCE([
665 #include <pthread.h>
666 #include <stdlib.h>
667 #include <ucontext.h>
668 #include <unistd.h>
670 __thread int tls;
672 static char stack[[10 * 1024 * 1024]];
673 static ucontext_t c;
675 /* Called via makecontext/setcontext.  */
677 static void
678 cfn (void)
680   exit (tls);
683 /* Called via pthread_create.  */
685 static void *
686 tfn (void *dummy)
688   /* The thread should still see this value after calling
689      setcontext.  */
690   tls = 0;
692   setcontext (&c);
694   /* The call to setcontext should not return.  */
695   abort ();
699 main ()
701   pthread_t tid;
703   /* The thread should not see this value.  */
704   tls = 1;
706   if (getcontext (&c) < 0)
707     abort ();
709   c.uc_stack.ss_sp = stack;
710 #ifdef MAKECONTEXT_STACK_TOP
711   c.uc_stack.ss_sp += sizeof stack;
712 #endif
713   c.uc_stack.ss_flags = 0;
714   c.uc_stack.ss_size = sizeof stack;
715   c.uc_link = NULL;
716   makecontext (&c, cfn, 0);
718   if (pthread_create (&tid, NULL, tfn, NULL) != 0)
719     abort ();
721   if (pthread_join (tid, NULL) != 0)
722     abort ();
724   /* The thread should have called exit.  */
725   abort ();
727 ])],
728 [libgo_cv_lib_setcontext_clobbers_tls=no],
729 [libgo_cv_lib_setcontext_clobbers_tls=yes],
730 [case "$target:$ptr_type_size" in
731   i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
732     libgo_cv_lib_setcontext_clobbers_tls=yes ;;
733   *)
734     libgo_cv_lib_setcontext_clobbers_tls=no ;;
735  esac
737 CFLAGS="$CFLAGS_hold"
738 LIBS="$LIBS_hold"
740 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
741   AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
742             [Define if setcontext clobbers TLS variables])
745 AC_CACHE_SAVE
747 if test ${multilib} = yes; then
748   multilib_arg="--enable-multilib"
749 else
750   multilib_arg=
753 AC_CONFIG_FILES(Makefile testsuite/Makefile)
755 AC_CONFIG_COMMANDS([default],
756 [if test -n "$CONFIG_FILES"; then
757    # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
758    # that multilib installs will end up installed in the correct place.
759    # The testsuite needs it for multilib-aware ABI baseline files.
760    # To work around this not being passed down from config-ml.in ->
761    # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
762    # append it here.  Only modify Makefiles that have just been created.
763    #
764    # Also, get rid of this simulated-VPATH thing that automake does.
765    cat > vpsed << \_EOF
766 s!`test -f '$<' || echo '$(srcdir)/'`!!
767 _EOF
768    for i in $SUBDIRS; do
769     case $CONFIG_FILES in
770      *${i}/Makefile*)
771        #echo "Adding MULTISUBDIR to $i/Makefile"
772        sed -f vpsed $i/Makefile > tmp
773        grep '^MULTISUBDIR =' Makefile >> tmp
774        mv tmp $i/Makefile
775        ;;
776     esac
777    done
778    rm vpsed
779  fi
782 # Variables needed in config.status (file generation) which aren't already
783 # passed by autoconf.
784 SUBDIRS="$SUBDIRS"
787 AC_OUTPUT