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.
10 AC_INIT(package-unused, version-unused,, libgo)
11 AC_CONFIG_SRCDIR(Makefile.am)
12 AC_CONFIG_HEADER(config.h)
15 AC_SUBST(libtool_VERSION)
17 AM_ENABLE_MULTILIB(, ..)
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],[])
30 m4_rename_force([glibgo_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
38 AC_CHECK_TOOL(OBJCOPY, objcopy, missing-objcopy)
42 AC_SUBST(enable_shared)
43 AC_SUBST(enable_static)
45 CC_FOR_BUILD=${CC_FOR_BUILD:-gcc}
46 AC_SUBST(CC_FOR_BUILD)
50 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
53 AC_ARG_ENABLE(werror, [AS_HELP_STRING([--enable-werror],
54 [turns on -Werror @<:@default=yes@:>@])])
55 if test "x$enable_werror" != "xno"; then
61 glibgo_toolexeclibdir=no
63 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
64 AC_ARG_ENABLE([version-specific-runtime-libs],
65 AC_HELP_STRING([--enable-version-specific-runtime-libs],
66 [Specify that runtime libraries should be installed in a compiler-specific directory]),
68 yes) version_specific_libs=yes ;;
69 no) version_specific_libs=no ;;
70 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
72 [version_specific_libs=no])
73 AC_MSG_RESULT($version_specific_libs)
75 # Version-specific runtime libs processing.
76 if test $version_specific_libs = yes; then
77 glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
78 glibgo_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
81 # Calculate glibgo_toolexecdir, glibgo_toolexeclibdir
82 # Install a library built with a cross compiler in tooldir, not libdir.
83 if test -n "$with_cross_host" &&
84 test x"$with_cross_host" != x"no"; then
85 nover_glibgo_toolexecdir='${exec_prefix}/${host_alias}'
86 nover_glibgo_toolexeclibdir='${toolexecdir}/lib'
88 nover_glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
89 nover_glibgo_toolexeclibdir='${libdir}'
91 multi_os_directory=`$GOC -print-multi-os-directory`
92 case $multi_os_directory in
93 .) ;; # Avoid trailing /.
94 *) nover_glibgo_toolexeclibdir=${nover_glibgo_toolexeclibdir}/${multi_os_directory} ;;
97 if test x"$glibgo_toolexecdir" = x"no"; then
98 glibgo_toolexecdir="${nover_glibgo_toolexecdir}"
99 glibgo_toolexeclibdir="${nover_glibgo_toolexeclibdir}"
102 AC_SUBST(glibgo_toolexecdir)
103 AC_SUBST(glibgo_toolexeclibdir)
104 AC_SUBST(nover_glibgo_toolexeclibdir)
106 # See if the user wants to configure without libffi. Some
107 # architectures don't support it. FIXME: We should set a default
110 AS_HELP_STRING([--without-libffi],
113 [with_libffi=${with_libffi_default-yes}])
117 if test "$with_libffi" != no; then
118 AC_DEFINE(USE_LIBFFI, 1, [Define if we're to use libffi.])
119 LIBFFI=../libffi/libffi_convenience.la
120 LIBFFIINCS='-I$(top_srcdir)/../libffi/include -I../libffi/include'
125 # See if the user wants to configure without libatomic. This is useful if we are
126 # on an architecture for which libgo does not need an atomic support library and
127 # libatomic does not support our C compiler.
128 AC_ARG_WITH(libatomic,
129 AS_HELP_STRING([--without-libatomic],
130 [don't use libatomic]),
132 [with_libatomic=${with_libatomic_default-yes}])
135 if test "$with_libatomic" != no; then
136 LIBATOMIC=../libatomic/libatomic_convenience.la
140 # Used to tell GNU make to include a file without telling automake to
142 go_include="-include"
156 *-*-darwin*) is_darwin=yes; GOOS=darwin ;;
157 *-*-freebsd*) is_freebsd=yes; GOOS=freebsd ;;
158 *-*-irix6*) is_irix=yes; GOOS=irix ;;
159 *-*-linux*) is_linux=yes; GOOS=linux ;;
160 *-*-netbsd*) is_netbsd=yes; GOOS=netbsd ;;
161 *-*-openbsd*) is_openbsd=yes; GOOS=openbsd ;;
162 *-*-dragonfly*) is_dragonfly=yes; GOOS=dragonfly ;;
163 *-*-rtems*) is_rtems=yes; GOOS=rtems ;;
164 *-*-solaris2*) is_solaris=yes; GOOS=solaris ;;
166 AM_CONDITIONAL(LIBGO_IS_DARWIN, test $is_darwin = yes)
167 AM_CONDITIONAL(LIBGO_IS_FREEBSD, test $is_freebsd = yes)
168 AM_CONDITIONAL(LIBGO_IS_IRIX, test $is_irix = yes)
169 AM_CONDITIONAL(LIBGO_IS_LINUX, test $is_linux = yes)
170 AM_CONDITIONAL(LIBGO_IS_NETBSD, test $is_netbsd = yes)
171 AM_CONDITIONAL(LIBGO_IS_OPENBSD, test $is_openbsd = yes)
172 AM_CONDITIONAL(LIBGO_IS_DRAGONFLY, test $is_dragonfly = yes)
173 AM_CONDITIONAL(LIBGO_IS_RTEMS, test $is_rtems = yes)
174 AM_CONDITIONAL(LIBGO_IS_SOLARIS, test $is_solaris = yes)
177 dnl Test whether we need to use DejaGNU or whether we can use the
178 dnl simpler gotest approach. We can only use gotest for a native
182 *-*-rtems*) USE_DEJAGNU=yes ;;
184 *) USE_DEJAGNU=yes ;;
186 AC_SUBST(USE_DEJAGNU)
188 dnl N.B. Keep in sync with gcc/testsuite/go.test/go-test.exp (go-set-goarch).
212 arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
217 i[34567]86-*-* | x86_64-*-*)
223 [is_386=yes], [is_x86_64=yes])
224 if test "$is_386" = "yes"; then
236 #if _MIPS_SIM != _ABIO32
241 #if _MIPS_SIM != _ABIN32
246 #if _MIPS_SIM != _ABI64
251 #if _MIPS_SIM != _ABIO64
255 [AC_MSG_ERROR([unknown MIPS ABI])
256 [mips_abi="n32"]])])])])
258 "o32") GOARCH=mipso32 ;;
259 "n32") GOARCH=mipsn32 ;;
260 "n64") GOARCH=mipsn64 ;;
261 "o64") GOARCH=mipso64 ;;
264 rs6000*-*-* | powerpc*-*-*)
269 [is_ppc=yes], [is_ppc64=yes])
270 if test "$is_ppc" = "yes"; then
278 #if defined(__s390x__)
281 [is_s390=yes], [is_s390x=yes])
282 if test "$is_s390" = "yes"; then
290 #if defined(__sparcv9) || defined(__arch64__)
293 [is_sparc=yes], [is_sparc64=yes])
294 if test "$is_sparc" = "yes"; then
301 AM_CONDITIONAL(LIBGO_IS_386, test $is_386 = yes)
302 AM_CONDITIONAL(LIBGO_IS_ALPHA, test $is_alpha = yes)
303 AM_CONDITIONAL(LIBGO_IS_ARM, test $is_arm = yes)
304 AM_CONDITIONAL(LIBGO_IS_ARM64, test $is_arm64 = yes)
305 AM_CONDITIONAL(LIBGO_IS_M68K, test $is_m68k = yes)
306 AM_CONDITIONAL(LIBGO_IS_MIPS, test $mips_abi != unknown)
307 AM_CONDITIONAL(LIBGO_IS_MIPSO32, test $mips_abi = o32)
308 AM_CONDITIONAL(LIBGO_IS_MIPSN32, test $mips_abi = n32)
309 AM_CONDITIONAL(LIBGO_IS_MIPSN64, test $mips_abi = n64)
310 AM_CONDITIONAL(LIBGO_IS_MIPSO64, test $mips_abi = o64)
311 AM_CONDITIONAL(LIBGO_IS_PPC, test $is_ppc = yes)
312 AM_CONDITIONAL(LIBGO_IS_PPC64, test $is_ppc64 = yes)
313 AM_CONDITIONAL(LIBGO_IS_S390, test $is_s390 = yes)
314 AM_CONDITIONAL(LIBGO_IS_S390X, test $is_s390x = yes)
315 AM_CONDITIONAL(LIBGO_IS_SPARC, test $is_sparc = yes)
316 AM_CONDITIONAL(LIBGO_IS_SPARC64, test $is_sparc64 = yes)
317 AM_CONDITIONAL(LIBGO_IS_X86_64, test $is_x86_64 = yes)
320 dnl Some files are only present when needed for specific architectures.
322 GO_LIBCALL_OS_ARCH_FILE=
324 GO_SYSCALL_OS_ARCH_FILE=
325 if test -f "${srcdir}/go/syscall/libcall_${GOOS}.go"; then
326 GO_LIBCALL_OS_FILE="go/syscall/libcall_${GOOS}.go"
328 if test -f "${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go"; then
329 GO_LIBCALL_OS_ARCH_FILE="go/syscall/libcall_${GOOS}_${GOARCH}.go"
331 if test -f "${srcdir}/go/syscall/syscall_${GOOS}.go"; then
332 GO_SYSCALL_OS_FILE="go/syscall/syscall_${GOOS}.go"
334 if test -f "${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go"; then
335 GO_SYSCALL_OS_ARCH_FILE="go/syscall/syscall_${GOOS}_${GOARCH}.go"
337 AC_SUBST(GO_LIBCALL_OS_FILE)
338 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
339 AC_SUBST(GO_SYSCALL_OS_FILE)
340 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
342 dnl Special flags used to generate sysinfo.go.
343 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
346 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
347 # msghdr in <sys/socket.h>.
348 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
350 *-*-solaris2.1[[01]])
351 # Solaris 10+ needs this so struct msghdr gets the msg_control
352 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
353 # above doesn't work with C99.
354 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
359 dnl Use -fsplit-stack when compiling C code if available.
360 AC_CACHE_CHECK([whether -fsplit-stack is supported],
361 [libgo_cv_c_split_stack_supported],
363 CFLAGS="$CFLAGS -fsplit-stack"
364 AC_COMPILE_IFELSE([[int i;]],
365 [libgo_cv_c_split_stack_supported=yes],
366 [libgo_cv_c_split_stack_supported=no])
367 CFLAGS=$CFLAGS_hold])
368 if test "$libgo_cv_c_split_stack_supported" = yes; then
369 SPLIT_STACK=-fsplit-stack
370 AC_DEFINE(USING_SPLIT_STACK, 1,
371 [Define if the compiler supports -fsplit-stack])
375 AC_SUBST(SPLIT_STACK)
376 AM_CONDITIONAL(USING_SPLIT_STACK,
377 test "$libgo_cv_c_split_stack_supported" = yes)
379 dnl Check whether the linker does stack munging when calling from
380 dnl split-stack into non-split-stack code. We check this by looking
381 dnl at the --help output. FIXME: This is only half right: it's
382 dnl possible for the linker to support this for some targets but not
384 AC_CACHE_CHECK([whether linker supports split stack],
385 [libgo_cv_c_linker_supports_split_stack],
386 [libgo_cv_c_linker_supports_split_stack=no
387 if $GOC -Wl,--help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
388 libgo_cv_c_linker_supports_split_stack=yes
390 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
391 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
392 [Define if the linker support split stack adjustments])
395 AC_CACHE_CHECK([whether compiler is llgo],
396 [libgo_cv_c_goc_is_llgo],
397 [libgo_cv_c_goc_is_llgo=no
398 if $GOC -dumpversion 2>/dev/null | grep llgo >/dev/null 2>&1; then
399 libgo_cv_c_goc_is_llgo=yes
401 AM_CONDITIONAL(GOC_IS_LLGO, test "$libgo_cv_c_goc_is_llgo" = yes)
403 dnl Test for the -lm library.
405 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
408 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
409 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
410 [libgo_cv_lib_sockets=
412 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
413 if test "$libgo_check_socket" = "yes"; then
414 unset ac_cv_func_connect
415 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
416 libgo_check_both=yes)
418 if test "$libgo_check_both" = "yes"; then
420 LIBS="$LIBS -lsocket -lnsl"
421 unset ac_cv_func_accept
422 AC_CHECK_FUNC(accept,
424 libgo_cv_lib_sockets="-lsocket -lnsl"])
425 unset ac_cv_func_accept
428 unset ac_cv_func_gethostbyname
429 libgo_old_libs="$LIBS"
430 AC_CHECK_FUNC(gethostbyname, ,
431 [AC_CHECK_LIB(nsl, main,
432 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
433 unset ac_cv_func_gethostbyname
436 NET_LIBS="$libgo_cv_lib_sockets"
439 dnl Test whether the compiler supports the -pthread option.
440 AC_CACHE_CHECK([whether -pthread is supported],
441 [libgo_cv_lib_pthread],
443 CFLAGS="$CFLAGS -pthread"
444 AC_COMPILE_IFELSE([[int i;]],
445 [libgo_cv_lib_pthread=yes],
446 [libgo_cv_lib_pthread=no])
447 CFLAGS=$CFLAGS_hold])
449 if test "$libgo_cv_lib_pthread" = yes; then
450 PTHREAD_CFLAGS=-pthread
452 AC_SUBST(PTHREAD_CFLAGS)
454 dnl Test for the -lpthread library.
456 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
457 AC_SUBST(PTHREAD_LIBS)
459 dnl Test if -lrt is required for sched_yield and/or nanosleep.
460 AC_SEARCH_LIBS([sched_yield], [rt])
461 AC_SEARCH_LIBS([nanosleep], [rt])
465 GCC_CHECK_UNWIND_GETIPINFO
467 AC_ARG_ENABLE(sjlj-exceptions,
468 AC_HELP_STRING([--enable-sjlj-exceptions],
469 [force use of builtin_setjmp for exceptions]),
470 [case "$enableval" in
472 *) AC_MSG_ERROR([unknown argument to --enable-sjlj-exceptions]) ;;
474 [enable_sjlj_exceptions=auto])
476 AC_CACHE_CHECK([whether to use setjmp/longjmp exceptions],
477 [libgo_cv_lib_sjlj_exceptions],
484 int i __attribute__ ((cleanup (clean)));
489 CFLAGS="--save-temps -fexceptions"
490 libgo_cv_lib_sjlj_exceptions=unknown
491 AS_IF([ac_fn_c_try_compile],
492 [if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1; then
493 libgo_cv_lib_sjlj_exceptions=yes
494 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1; then
495 libgo_cv_lib_sjlj_exceptions=no
501 if test "$enable_sjlj_exceptions" = "auto"; then
502 enable_sjlj_exceptions=$libgo_cv_lib_sjlj_exceptions
505 case $enable_sjlj_exceptions in
507 AC_DEFINE(LIBGO_SJLJ_EXCEPTIONS, 1,
508 [Define if the C++ compiler is configured for setjmp/longjmp exceptions.])
513 AC_MSG_ERROR([unable to detect exception model])
517 AC_CHECK_HEADERS(sched.h sys/file.h sys/mman.h syscall.h sys/epoll.h sys/inotify.h sys/ptrace.h sys/syscall.h sys/user.h sys/utsname.h sys/select.h sys/socket.h net/if.h net/if_arp.h net/route.h netpacket/packet.h sys/prctl.h sys/mount.h sys/vfs.h sys/statfs.h sys/timex.h sys/sysinfo.h utime.h linux/ether.h linux/fs.h linux/reboot.h netinet/icmp6.h netinet/in_syst.h netinet/ip.h netinet/ip_mroute.h netinet/if_ether.h)
519 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
520 [#ifdef HAVE_SYS_SOCKET_H
521 #include <sys/socket.h>
525 AC_CACHE_CHECK([whether <ustat.h> can be used],
526 [libgo_cv_c_ustat_h],
528 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE $OSCFLAGS"
531 #include <sys/types.h>
532 #ifdef HAVE_LINUX_FILTER_H
533 #include <linux/filter.h>
536 ])], [libgo_cv_c_ustat_h=yes], [libgo_cv_c_ustat_h=no])
537 CFLAGS=$CFLAGS_hold])
538 if test $libgo_cv_c_ustat_h = yes; then
539 AC_DEFINE(HAVE_USTAT_H, 1,
540 [Define to 1 if you have the <ustat.h> header file and it works.])
543 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
545 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv dl_iterate_phdr)
546 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
547 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
549 AC_CHECK_FUNCS(accept4 dup3 epoll_create1 faccessat fallocate fchmodat fchownat futimesat getxattr inotify_add_watch inotify_init inotify_init1 inotify_rm_watch listxattr mkdirat mknodat open64 openat pipe2 removexattr renameat setxattr sync_file_range splice tee unlinkat unshare utimensat)
551 AC_CHECK_TYPES([loff_t])
555 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
558 CFLAGS_hold="$CFLAGS"
559 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
561 LIBS="$LIBS $PTHREAD_LIBS"
562 AC_CHECK_FUNCS(sem_timedwait)
563 CFLAGS="$CFLAGS_hold"
567 LIBS="$LIBS $MATH_LIBS"
568 AC_CHECK_FUNCS(matherr)
571 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4],
572 [libgo_cv_func___sync_bool_compare_and_swap_4],
574 typedef unsigned int uint32 __attribute__ ((mode (SI)));
576 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
578 [libgo_cv_func___sync_bool_compare_and_swap_4=yes],
579 [libgo_cv_func___sync_bool_compare_and_swap_4=no])])
580 if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then
581 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1,
582 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32])
585 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_8],
586 [libgo_cv_func___sync_bool_compare_and_swap_8],
588 typedef unsigned int uint64 __attribute__ ((mode (DI)));
590 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
592 [libgo_cv_func___sync_bool_compare_and_swap_8=yes],
593 [libgo_cv_func___sync_bool_compare_and_swap_8=no])])
594 if test "$libgo_cv_func___sync_bool_compare_and_swap_8" = "yes"; then
595 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_8, 1,
596 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint64])
599 AC_CACHE_CHECK([for __sync_fetch_and_add_4],
600 [libgo_cv_func___sync_fetch_and_add_4],
602 typedef unsigned int uint32 __attribute__ ((mode (SI)));
604 int main() { return __sync_fetch_and_add (&i, 1); }
606 [libgo_cv_func___sync_fetch_and_add_4=yes],
607 [libgo_cv_func___sync_fetch_and_add_4=no])])
608 if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then
609 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1,
610 [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32])
613 AC_CACHE_CHECK([for __sync_add_and_fetch_8],
614 [libgo_cv_func___sync_add_and_fetch_8],
616 typedef unsigned int uint64 __attribute__ ((mode (DI)));
618 int main() { return __sync_add_and_fetch (&i, 1); }
620 [libgo_cv_func___sync_add_and_fetch_8=yes],
621 [libgo_cv_func___sync_add_and_fetch_8=no])])
622 if test "$libgo_cv_func___sync_add_and_fetch_8" = "yes"; then
623 AC_DEFINE(HAVE_SYNC_ADD_AND_FETCH_8, 1,
624 [Define to 1 if the compiler provides the __sync_add_and_fetch function for uint64])
627 dnl For x86 we want to use the -minline-all-stringops option to avoid
628 dnl forcing a stack split when calling memcpy and friends.
629 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
630 [libgo_cv_c_stringops],
632 CFLAGS="$CFLAGS -minline-all-stringops"
633 AC_COMPILE_IFELSE([int i;],
634 [libgo_cv_c_stringops=yes],
635 [libgo_cv_c_stringops=no])
636 CFLAGS=$CFLAGS_hold])
638 if test "$libgo_cv_c_stringops" = yes; then
639 STRINGOPS_FLAG=-minline-all-stringops
641 AC_SUBST(STRINGOPS_FLAG)
643 dnl For x86 we want to compile the math library with -mfancy-math-387
644 dnl -funsafe-math-optimizations so that we can use the builtin
645 dnl instructions directly.
646 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
647 [libgo_cv_c_fancymath],
649 CFLAGS="$CFLAGS -mfancy-math-387"
650 AC_COMPILE_IFELSE([int i;],
651 [libgo_cv_c_fancymath=yes],
652 [libgo_cv_c_fancymath=no])
653 CFLAGS=$CFLAGS_hold])
655 if test "$libgo_cv_c_fancymath" = yes; then
656 MATH_FLAG="-mfancy-math-387 -funsafe-math-optimizations"
658 MATH_FLAG="-ffp-contract=off"
663 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
664 AC_CHECK_TYPES([off64_t])
667 dnl Work out the size of the epoll_events struct on GNU/Linux.
668 AC_CACHE_CHECK([epoll_event size],
669 [libgo_cv_c_epoll_event_size],
670 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
671 [sizeof (struct epoll_event)],
672 [#include <sys/epoll.h>],
673 [libgo_cv_c_epoll_event_size=0])])
674 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
675 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
677 dnl Work out the offset of the fd field in the epoll_events struct on
679 AC_CACHE_CHECK([epoll_event data.fd offset],
680 [libgo_cv_c_epoll_event_fd_offset],
681 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
682 [offsetof (struct epoll_event, data.fd)],
684 #include <sys/epoll.h>],
685 [libgo_cv_c_epoll_event_fd_offset=0])])
686 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
687 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
689 dnl See if struct exception is defined in <math.h>.
690 AC_CHECK_TYPE([struct exception],
691 [libgo_has_struct_exception=yes],
692 [libgo_has_struct_exception=no],
694 if test "$libgo_has_struct_exception" = "yes"; then
695 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
696 [Define to 1 if <math.h> defines struct exception])
699 dnl See whether setcontext changes the value of TLS variables.
700 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
701 [libgo_cv_lib_setcontext_clobbers_tls],
702 [CFLAGS_hold="$CFLAGS"
703 CFLAGS="$PTHREAD_CFLAGS"
705 LIBS="$LIBS $PTHREAD_LIBS"
706 AC_CHECK_SIZEOF([void *])
707 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
712 #include <ucontext.h>
717 static char stack[[10 * 1024 * 1024]];
720 /* Called via makecontext/setcontext. */
728 /* Called via pthread_create. */
733 /* The thread should still see this value after calling
739 /* The call to setcontext should not return. */
748 /* The thread should not see this value. */
751 if (getcontext (&c) < 0)
754 c.uc_stack.ss_sp = stack;
755 #ifdef MAKECONTEXT_STACK_TOP
756 c.uc_stack.ss_sp += sizeof stack;
758 c.uc_stack.ss_flags = 0;
759 c.uc_stack.ss_size = sizeof stack;
761 makecontext (&c, cfn, 0);
763 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
766 if (pthread_join (tid, NULL) != 0)
769 /* The thread should have called exit. */
773 [libgo_cv_lib_setcontext_clobbers_tls=no],
774 [libgo_cv_lib_setcontext_clobbers_tls=yes],
775 [case "$target:$ptr_type_size" in
776 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
777 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
779 libgo_cv_lib_setcontext_clobbers_tls=no ;;
782 CFLAGS="$CFLAGS_hold"
785 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
786 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
787 [Define if setcontext clobbers TLS variables])
790 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
791 libgo_cv_ro_eh_frame, [
792 libgo_cv_ro_eh_frame=no
793 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
794 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
795 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
796 libgo_cv_ro_eh_frame=yes
797 elif grep '.section.*eh_frame.*#alloc' conftest.c \
798 | grep -v '#write' > /dev/null; then
799 libgo_cv_ro_eh_frame=yes
804 if test "x$libgo_cv_ro_eh_frame" = xyes; then
805 AC_DEFINE(EH_FRAME_FLAGS, "a",
806 [Define to the flags needed for the .section .eh_frame directive.])
808 AC_DEFINE(EH_FRAME_FLAGS, "aw",
809 [Define to the flags needed for the .section .eh_frame directive.])
812 AC_CACHE_CHECK([if compiler supports -Qunused-arguments],
813 [libgo_cv_c_unused_arguments],
815 CFLAGS="$CFLAGS -Qunused-arguments"
816 AC_COMPILE_IFELSE([[int i;]],
817 [libgo_cv_c_unused_arguments=yes],
818 [libgo_cv_c_unused_arguments=no])
819 CFLAGS=$CFLAGS_hold])
821 AC_CACHE_CHECK([if assembler supports GNU comdat group syntax],
822 libgo_cv_as_comdat_gnu, [
823 echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s
825 if test "$libgo_cv_c_unused_arguments" = yes; then
826 CFLAGS="$CFLAGS -Qunused-arguments"
828 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
829 libgo_cv_as_comdat_gnu=yes
831 libgo_cv_as_comdat_gnu=no
835 if test "x$libgo_cv_as_comdat_gnu" = xyes; then
836 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1,
837 [Define if your assembler supports GNU comdat group syntax.])
840 AC_CACHE_CHECK([assembler supports pc related relocs],
841 libgo_cv_as_x86_pcrel, [
842 libgo_cv_as_x86_pcrel=yes
843 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
845 if test "$libgo_cv_c_unused_arguments" = yes; then
846 CFLAGS="$CFLAGS -Qunused-arguments"
848 if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
849 libgo_cv_as_x86_pcrel=no
853 if test "x$libgo_cv_as_x86_pcrel" = xyes; then
854 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
855 [Define if your assembler supports PC relative relocs.])
858 AC_CACHE_CHECK([assembler supports unwind section type],
859 libgo_cv_as_x86_64_unwind_section_type, [
860 libgo_cv_as_x86_64_unwind_section_type=yes
861 echo '.section .eh_frame,"a",@unwind' > conftest.s
863 if test "$libgo_cv_c_unused_arguments" = yes; then
864 CFLAGS="$CFLAGS -Qunused-arguments"
866 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
867 libgo_cv_as_x86_64_unwind_section_type=no
871 if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then
872 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
873 [Define if your assembler supports unwind section type.])
878 if test ${multilib} = yes; then
879 multilib_arg="--enable-multilib"
884 AC_CONFIG_FILES(Makefile testsuite/Makefile)
886 AC_CONFIG_COMMANDS([default],
887 [if test -n "$CONFIG_FILES"; then
888 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
889 # that multilib installs will end up installed in the correct place.
890 # The testsuite needs it for multilib-aware ABI baseline files.
891 # To work around this not being passed down from config-ml.in ->
892 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
893 # append it here. Only modify Makefiles that have just been created.
895 # Also, get rid of this simulated-VPATH thing that automake does.
897 s!`test -f '$<' || echo '$(srcdir)/'`!!
899 for i in $SUBDIRS; do
900 case $CONFIG_FILES in
902 #echo "Adding MULTISUBDIR to $i/Makefile"
903 sed -f vpsed $i/Makefile > tmp
904 grep '^MULTISUBDIR =' Makefile >> tmp
913 # Variables needed in config.status (file generation) which aren't already
914 # passed by autoconf.