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)
14 libtool_VERSION=10:0:0
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)
175 AM_CONDITIONAL(LIBGO_IS_BSD, test $is_darwin = yes -o $is_dragonfly = yes -o $is_freebsd = yes -o $is_netbsd = yes -o $is_openbsd = yes)
178 dnl Test whether we need to use DejaGNU or whether we can use the
179 dnl simpler gotest approach. We can only use gotest for a native
183 *-*-rtems*) USE_DEJAGNU=yes ;;
185 *) USE_DEJAGNU=yes ;;
187 AC_SUBST(USE_DEJAGNU)
189 dnl N.B. Keep in sync with gcc/testsuite/go.test/go-test.exp (go-set-goarch).
215 arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
220 i[34567]86-*-* | x86_64-*-*)
226 [is_386=yes], [is_x86_64=yes])
227 if test "$is_386" = "yes"; then
243 #if _MIPS_SIM != _ABIO32
248 #if _MIPS_SIM != _ABIN32
253 #if _MIPS_SIM != _ABI64
258 #if _MIPS_SIM != _ABIO64
262 [AC_MSG_ERROR([unknown MIPS ABI])
263 [mips_abi="n32"]])])])])
265 "o32") GOARCH=mipso32 ;;
266 "n32") GOARCH=mipsn32 ;;
267 "n64") GOARCH=mipsn64 ;;
268 "o64") GOARCH=mipso64 ;;
271 rs6000*-*-* | powerpc*-*-*)
278 #if defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN__)
281 [is_ppc64le=yes],[is_ppc64=yes])])
282 if test "$is_ppc" = "yes"; then
284 elif test "$is_ppc64" = "yes"; then
292 #if defined(__s390x__)
295 [is_s390=yes], [is_s390x=yes])
296 if test "$is_s390" = "yes"; then
304 #if defined(__sparcv9) || defined(__arch64__)
307 [is_sparc=yes], [is_sparc64=yes])
308 if test "$is_sparc" = "yes"; then
315 AM_CONDITIONAL(LIBGO_IS_386, test $is_386 = yes)
316 AM_CONDITIONAL(LIBGO_IS_ALPHA, test $is_alpha = yes)
317 AM_CONDITIONAL(LIBGO_IS_ARM, test $is_arm = yes)
318 AM_CONDITIONAL(LIBGO_IS_ARM64, test $is_arm64 = yes)
319 AM_CONDITIONAL(LIBGO_IS_IA64, test $is_ia64 = yes)
320 AM_CONDITIONAL(LIBGO_IS_M68K, test $is_m68k = yes)
321 AM_CONDITIONAL(LIBGO_IS_MIPS, test $mips_abi != unknown)
322 AM_CONDITIONAL(LIBGO_IS_MIPSO32, test $mips_abi = o32)
323 AM_CONDITIONAL(LIBGO_IS_MIPSN32, test $mips_abi = n32)
324 AM_CONDITIONAL(LIBGO_IS_MIPSN64, test $mips_abi = n64)
325 AM_CONDITIONAL(LIBGO_IS_MIPSO64, test $mips_abi = o64)
326 AM_CONDITIONAL(LIBGO_IS_MIPS64, test $mips_abi = n64 -o $mips_abi = o64)
327 AM_CONDITIONAL(LIBGO_IS_PPC, test $is_ppc = yes)
328 AM_CONDITIONAL(LIBGO_IS_PPC64, test $is_ppc64 = yes)
329 AM_CONDITIONAL(LIBGO_IS_PPC64LE, test $is_ppc64le = yes)
330 AM_CONDITIONAL(LIBGO_IS_S390, test $is_s390 = yes)
331 AM_CONDITIONAL(LIBGO_IS_S390X, test $is_s390x = yes)
332 AM_CONDITIONAL(LIBGO_IS_SPARC, test $is_sparc = yes)
333 AM_CONDITIONAL(LIBGO_IS_SPARC64, test $is_sparc64 = yes)
334 AM_CONDITIONAL(LIBGO_IS_X86_64, test $is_x86_64 = yes)
337 dnl Some files are only present when needed for specific architectures.
339 GO_LIBCALL_OS_ARCH_FILE=
341 GO_SYSCALL_OS_ARCH_FILE=
342 if test -f "${srcdir}/go/syscall/libcall_${GOOS}.go"; then
343 GO_LIBCALL_OS_FILE="go/syscall/libcall_${GOOS}.go"
345 if test -f "${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go"; then
346 GO_LIBCALL_OS_ARCH_FILE="go/syscall/libcall_${GOOS}_${GOARCH}.go"
348 if test -f "${srcdir}/go/syscall/syscall_${GOOS}.go"; then
349 GO_SYSCALL_OS_FILE="go/syscall/syscall_${GOOS}.go"
351 if test -f "${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go"; then
352 GO_SYSCALL_OS_ARCH_FILE="go/syscall/syscall_${GOOS}_${GOARCH}.go"
354 AC_SUBST(GO_LIBCALL_OS_FILE)
355 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
356 AC_SUBST(GO_SYSCALL_OS_FILE)
357 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
359 dnl Special flags used to generate sysinfo.go.
360 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
363 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
364 # msghdr in <sys/socket.h>.
365 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
367 *-*-solaris2.1[[01]])
368 # Solaris 10+ needs this so struct msghdr gets the msg_control
369 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
370 # above doesn't work with C99.
371 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
376 dnl Use -fsplit-stack when compiling C code if available.
377 AC_CACHE_CHECK([whether -fsplit-stack is supported],
378 [libgo_cv_c_split_stack_supported],
380 CFLAGS="$CFLAGS -fsplit-stack"
381 AC_COMPILE_IFELSE([[int i;]],
382 [libgo_cv_c_split_stack_supported=yes],
383 [libgo_cv_c_split_stack_supported=no])
384 CFLAGS=$CFLAGS_hold])
386 dnl Make sure the linker permits -fsplit-stack. Old versions of gold will
387 dnl reject split-stack code calling non-split-stack code on targets
388 dnl they don't support.
389 AC_CACHE_CHECK([whether linker supports split/non-split linked together],
390 [libgo_cv_c_linker_split_non_split],
391 [cat > conftest1.c << EOF
393 int main() { f(); return 0; }
395 cat > conftest2.c << EOF
398 $CC -c -fsplit-stack $CFLAGS $CPPFLAGS conftest1.c
399 $CC -c $CFLAGS $CPPFLAGS conftest2.c
400 if $CC -o conftest conftest1.$ac_objext conftest2.$ac_objext; then
401 libgo_cv_c_linker_split_non_split=yes
403 libgo_cv_c_linker_split_non_split=no
405 rm -f conftest1.* conftest2.* conftest])
407 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes; then
408 SPLIT_STACK=-fsplit-stack
409 AC_DEFINE(USING_SPLIT_STACK, 1,
410 [Define if the compiler supports -fsplit-stack])
414 AC_SUBST(SPLIT_STACK)
415 AM_CONDITIONAL(USING_SPLIT_STACK,
416 test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes)
418 dnl If the compiler supports split-stack but the linker does not, then
419 dnl we need to explicitly disable split-stack for Go.
420 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = no; then
421 GO_SPLIT_STACK=-fno-split-stack
425 AC_SUBST(GO_SPLIT_STACK)
427 dnl Check whether the linker does stack munging when calling from
428 dnl split-stack into non-split-stack code. We check this by looking
429 dnl at the --help output. FIXME: This is only half right: it's
430 dnl possible for the linker to support this for some targets but not
432 dnl This is slightly different from the above check, which is whether
433 dnl the linker permits the call at all.
434 AC_CACHE_CHECK([whether linker supports split stack],
435 [libgo_cv_c_linker_supports_split_stack],
436 [libgo_cv_c_linker_supports_split_stack=no
437 if $GOC -Wl,--help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
438 libgo_cv_c_linker_supports_split_stack=yes
440 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
441 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
442 [Define if the linker support split stack adjustments])
445 AC_CACHE_CHECK([whether compiler is llgo],
446 [libgo_cv_c_goc_is_llgo],
447 [libgo_cv_c_goc_is_llgo=no
448 if $GOC -dumpversion 2>/dev/null | grep llgo >/dev/null 2>&1; then
449 libgo_cv_c_goc_is_llgo=yes
451 AM_CONDITIONAL(GOC_IS_LLGO, test "$libgo_cv_c_goc_is_llgo" = yes)
453 dnl Test for the -lm library.
455 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
458 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
459 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
460 [libgo_cv_lib_sockets=
462 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
463 if test "$libgo_check_socket" = "yes"; then
464 unset ac_cv_func_connect
465 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
466 libgo_check_both=yes)
468 if test "$libgo_check_both" = "yes"; then
470 LIBS="$LIBS -lsocket -lnsl"
471 unset ac_cv_func_accept
472 AC_CHECK_FUNC(accept,
474 libgo_cv_lib_sockets="-lsocket -lnsl"])
475 unset ac_cv_func_accept
478 unset ac_cv_func_gethostbyname
479 libgo_old_libs="$LIBS"
480 AC_CHECK_FUNC(gethostbyname, ,
481 [AC_CHECK_LIB(nsl, main,
482 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
483 unset ac_cv_func_gethostbyname
484 AC_CHECK_FUNC(sendfile, ,
485 [AC_CHECK_LIB(sendfile, main,
486 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lsendfile"])])
489 NET_LIBS="$libgo_cv_lib_sockets"
492 dnl Test whether the compiler supports the -pthread option.
493 AC_CACHE_CHECK([whether -pthread is supported],
494 [libgo_cv_lib_pthread],
496 CFLAGS="$CFLAGS -pthread"
497 AC_COMPILE_IFELSE([[int i;]],
498 [libgo_cv_lib_pthread=yes],
499 [libgo_cv_lib_pthread=no])
500 CFLAGS=$CFLAGS_hold])
502 if test "$libgo_cv_lib_pthread" = yes; then
503 PTHREAD_CFLAGS=-pthread
505 AC_SUBST(PTHREAD_CFLAGS)
507 dnl Test for the -lpthread library.
509 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
510 AC_SUBST(PTHREAD_LIBS)
512 dnl Test if -lrt is required for sched_yield or nanosleep or clock_gettime.
513 AC_SEARCH_LIBS([sched_yield], [rt])
514 AC_SEARCH_LIBS([nanosleep], [rt])
515 AC_SEARCH_LIBS([clock_gettime], [rt])
519 GCC_CHECK_UNWIND_GETIPINFO
521 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)
523 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
524 [#ifdef HAVE_SYS_SOCKET_H
525 #include <sys/socket.h>
529 AC_CACHE_CHECK([whether <ustat.h> can be used],
530 [libgo_cv_c_ustat_h],
532 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE $OSCFLAGS"
535 #include <sys/types.h>
536 #ifdef HAVE_LINUX_FILTER_H
537 #include <linux/filter.h>
540 ])], [libgo_cv_c_ustat_h=yes], [libgo_cv_c_ustat_h=no])
541 CFLAGS=$CFLAGS_hold])
542 if test $libgo_cv_c_ustat_h = yes; then
543 AC_DEFINE(HAVE_USTAT_H, 1,
544 [Define to 1 if you have the <ustat.h> header file and it works.])
547 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
549 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv unsetenv dl_iterate_phdr)
550 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
551 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
553 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)
555 AC_CHECK_TYPES([loff_t])
559 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
562 CFLAGS_hold="$CFLAGS"
563 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
565 LIBS="$LIBS $PTHREAD_LIBS"
566 AC_CHECK_FUNCS(sem_timedwait)
567 CFLAGS="$CFLAGS_hold"
571 LIBS="$LIBS $MATH_LIBS"
572 AC_CHECK_FUNCS(matherr)
575 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4],
576 [libgo_cv_func___sync_bool_compare_and_swap_4],
578 typedef unsigned int uint32 __attribute__ ((mode (SI)));
580 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
582 [libgo_cv_func___sync_bool_compare_and_swap_4=yes],
583 [libgo_cv_func___sync_bool_compare_and_swap_4=no])])
584 if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then
585 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1,
586 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32])
589 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_8],
590 [libgo_cv_func___sync_bool_compare_and_swap_8],
592 typedef unsigned int uint64 __attribute__ ((mode (DI)));
594 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
596 [libgo_cv_func___sync_bool_compare_and_swap_8=yes],
597 [libgo_cv_func___sync_bool_compare_and_swap_8=no])])
598 if test "$libgo_cv_func___sync_bool_compare_and_swap_8" = "yes"; then
599 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_8, 1,
600 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint64])
603 AC_CACHE_CHECK([for __sync_fetch_and_add_4],
604 [libgo_cv_func___sync_fetch_and_add_4],
606 typedef unsigned int uint32 __attribute__ ((mode (SI)));
608 int main() { return __sync_fetch_and_add (&i, 1); }
610 [libgo_cv_func___sync_fetch_and_add_4=yes],
611 [libgo_cv_func___sync_fetch_and_add_4=no])])
612 if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then
613 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1,
614 [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32])
617 AC_CACHE_CHECK([for __sync_add_and_fetch_8],
618 [libgo_cv_func___sync_add_and_fetch_8],
620 typedef unsigned int uint64 __attribute__ ((mode (DI)));
622 int main() { return __sync_add_and_fetch (&i, 1); }
624 [libgo_cv_func___sync_add_and_fetch_8=yes],
625 [libgo_cv_func___sync_add_and_fetch_8=no])])
626 if test "$libgo_cv_func___sync_add_and_fetch_8" = "yes"; then
627 AC_DEFINE(HAVE_SYNC_ADD_AND_FETCH_8, 1,
628 [Define to 1 if the compiler provides the __sync_add_and_fetch function for uint64])
631 dnl For x86 we want to use the -minline-all-stringops option to avoid
632 dnl forcing a stack split when calling memcpy and friends.
633 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
634 [libgo_cv_c_stringops],
636 CFLAGS="$CFLAGS -minline-all-stringops"
637 AC_COMPILE_IFELSE([int i;],
638 [libgo_cv_c_stringops=yes],
639 [libgo_cv_c_stringops=no])
640 CFLAGS=$CFLAGS_hold])
642 if test "$libgo_cv_c_stringops" = yes; then
643 STRINGOPS_FLAG=-minline-all-stringops
645 AC_SUBST(STRINGOPS_FLAG)
647 dnl For x86 we want to compile the math library with -mfancy-math-387
648 dnl -funsafe-math-optimizations so that we can use the builtin
649 dnl instructions directly.
650 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
651 [libgo_cv_c_fancymath],
653 CFLAGS="$CFLAGS -mfancy-math-387"
654 AC_COMPILE_IFELSE([int i;],
655 [libgo_cv_c_fancymath=yes],
656 [libgo_cv_c_fancymath=no])
657 CFLAGS=$CFLAGS_hold])
659 if test "$libgo_cv_c_fancymath" = yes; then
660 MATH_FLAG="-mfancy-math-387 -funsafe-math-optimizations"
662 MATH_FLAG="-ffp-contract=off"
667 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
668 AC_CHECK_TYPES([off64_t])
671 dnl Work out the size of the epoll_events struct on GNU/Linux.
672 AC_CACHE_CHECK([epoll_event size],
673 [libgo_cv_c_epoll_event_size],
674 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
675 [sizeof (struct epoll_event)],
676 [#include <sys/epoll.h>],
677 [libgo_cv_c_epoll_event_size=0])])
678 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
679 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
681 dnl Work out the offset of the fd field in the epoll_events struct on
683 AC_CACHE_CHECK([epoll_event data.fd offset],
684 [libgo_cv_c_epoll_event_fd_offset],
685 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
686 [offsetof (struct epoll_event, data.fd)],
688 #include <sys/epoll.h>],
689 [libgo_cv_c_epoll_event_fd_offset=0])])
690 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
691 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
693 dnl Check if <sys/stat.h> uses timespec_t for st_?tim members. Introduced
694 dnl in Solaris 12 for XPG7 compatibility.
695 AC_EGREP_HEADER([timespec_t.*st_atim], [sys/stat.h],
696 [have_stat_timespec=yes], [have_stat_timespec=no])
697 AM_CONDITIONAL(HAVE_STAT_TIMESPEC, test $have_stat_timespec = yes)
699 dnl See if struct exception is defined in <math.h>.
700 AC_CHECK_TYPE([struct exception],
701 [libgo_has_struct_exception=yes],
702 [libgo_has_struct_exception=no],
704 if test "$libgo_has_struct_exception" = "yes"; then
705 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
706 [Define to 1 if <math.h> defines struct exception])
709 dnl See whether setcontext changes the value of TLS variables.
710 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
711 [libgo_cv_lib_setcontext_clobbers_tls],
712 [CFLAGS_hold="$CFLAGS"
713 CFLAGS="$PTHREAD_CFLAGS"
715 LIBS="$LIBS $PTHREAD_LIBS"
716 AC_CHECK_SIZEOF([void *])
717 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
722 #include <ucontext.h>
727 static char stack[[10 * 1024 * 1024]];
730 /* Called via makecontext/setcontext. */
738 /* Called via pthread_create. */
743 /* The thread should still see this value after calling
749 /* The call to setcontext should not return. */
758 /* The thread should not see this value. */
761 if (getcontext (&c) < 0)
764 c.uc_stack.ss_sp = stack;
765 #ifdef MAKECONTEXT_STACK_TOP
766 c.uc_stack.ss_sp += sizeof stack;
768 c.uc_stack.ss_flags = 0;
769 c.uc_stack.ss_size = sizeof stack;
771 makecontext (&c, cfn, 0);
773 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
776 if (pthread_join (tid, NULL) != 0)
779 /* The thread should have called exit. */
783 [libgo_cv_lib_setcontext_clobbers_tls=no],
784 [libgo_cv_lib_setcontext_clobbers_tls=yes],
785 [case "$target:$ptr_type_size" in
786 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
787 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
789 libgo_cv_lib_setcontext_clobbers_tls=no ;;
792 CFLAGS="$CFLAGS_hold"
795 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
796 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
797 [Define if setcontext clobbers TLS variables])
800 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
801 libgo_cv_ro_eh_frame, [
802 libgo_cv_ro_eh_frame=no
803 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
804 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
805 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
806 libgo_cv_ro_eh_frame=yes
807 elif grep '.section.*eh_frame.*#alloc' conftest.c \
808 | grep -v '#write' > /dev/null; then
809 libgo_cv_ro_eh_frame=yes
814 if test "x$libgo_cv_ro_eh_frame" = xyes; then
815 AC_DEFINE(EH_FRAME_FLAGS, "a",
816 [Define to the flags needed for the .section .eh_frame directive.])
818 AC_DEFINE(EH_FRAME_FLAGS, "aw",
819 [Define to the flags needed for the .section .eh_frame directive.])
822 AC_CACHE_CHECK([if compiler supports -Qunused-arguments],
823 [libgo_cv_c_unused_arguments],
825 CFLAGS="$CFLAGS -Qunused-arguments"
826 AC_COMPILE_IFELSE([[int i;]],
827 [libgo_cv_c_unused_arguments=yes],
828 [libgo_cv_c_unused_arguments=no])
829 CFLAGS=$CFLAGS_hold])
831 AC_CACHE_CHECK([if assembler supports GNU comdat group syntax],
832 libgo_cv_as_comdat_gnu, [
833 echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s
835 if test "$libgo_cv_c_unused_arguments" = yes; then
836 CFLAGS="$CFLAGS -Qunused-arguments"
838 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
839 libgo_cv_as_comdat_gnu=yes
841 libgo_cv_as_comdat_gnu=no
845 if test "x$libgo_cv_as_comdat_gnu" = xyes; then
846 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1,
847 [Define if your assembler supports GNU comdat group syntax.])
850 AC_CACHE_CHECK([assembler supports pc related relocs],
851 libgo_cv_as_x86_pcrel, [
852 libgo_cv_as_x86_pcrel=yes
853 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
855 if test "$libgo_cv_c_unused_arguments" = yes; then
856 CFLAGS="$CFLAGS -Qunused-arguments"
858 if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
859 libgo_cv_as_x86_pcrel=no
863 if test "x$libgo_cv_as_x86_pcrel" = xyes; then
864 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
865 [Define if your assembler supports PC relative relocs.])
868 AC_CACHE_CHECK([assembler supports unwind section type],
869 libgo_cv_as_x86_64_unwind_section_type, [
870 libgo_cv_as_x86_64_unwind_section_type=yes
871 echo '.section .eh_frame,"a",@unwind' > conftest.s
873 if test "$libgo_cv_c_unused_arguments" = yes; then
874 CFLAGS="$CFLAGS -Qunused-arguments"
876 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
877 libgo_cv_as_x86_64_unwind_section_type=no
881 if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then
882 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
883 [Define if your assembler supports unwind section type.])
888 if test ${multilib} = yes; then
889 multilib_arg="--enable-multilib"
894 AC_CONFIG_FILES(Makefile testsuite/Makefile)
896 AC_CONFIG_COMMANDS([default],
897 [if test -n "$CONFIG_FILES"; then
898 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
899 # that multilib installs will end up installed in the correct place.
900 # The testsuite needs it for multilib-aware ABI baseline files.
901 # To work around this not being passed down from config-ml.in ->
902 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
903 # append it here. Only modify Makefiles that have just been created.
905 # Also, get rid of this simulated-VPATH thing that automake does.
907 s!`test -f '$<' || echo '$(srcdir)/'`!!
909 for i in $SUBDIRS; do
910 case $CONFIG_FILES in
912 #echo "Adding MULTISUBDIR to $i/Makefile"
913 sed -f vpsed $i/Makefile > tmp
914 grep '^MULTISUBDIR =' Makefile >> tmp
923 # Variables needed in config.status (file generation) which aren't already
924 # passed by autoconf.