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_INIT(package-unused, version-unused,, libgo)
10 AC_CONFIG_SRCDIR(Makefile.am)
11 AC_CONFIG_HEADER(config.h)
13 libtool_VERSION=17:0:0
14 AC_SUBST(libtool_VERSION)
16 AM_ENABLE_MULTILIB(, ..)
19 target_alias=${target_alias-$host_alias}
21 AM_INIT_AUTOMAKE([1.9.3 no-define foreign no-dist subdir-objects -Wall -Wno-portability -Wno-override])
22 AH_TEMPLATE(PACKAGE, [Name of package])
23 AH_TEMPLATE(VERSION, [Version number of package])
25 m4_rename([_AC_ARG_VAR_PRECIOUS],[glibgo_PRECIOUS])
26 m4_define([_AC_ARG_VAR_PRECIOUS],[])
30 m4_rename_force([glibgo_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
36 # static hash tables crashes on AIX when libgo is built with O2
37 CFLAGS="$CFLAGS -fno-section-anchors"
38 GOCFLAGS="$GOCFLAGS -fno-section-anchors"
40 # Check default architecture for FAT library creation
41 if test -z "`$CC -x c -E /dev/null -g3 -o - | grep 64BIT`" ; then
46 AC_SUBST(AIX_EXTRA_ARCH)
54 AC_CHECK_TOOL(OBJCOPY, objcopy, missing-objcopy)
58 AC_SUBST(enable_shared)
59 AC_SUBST(enable_static)
61 CC_FOR_BUILD=${CC_FOR_BUILD:-gcc}
62 AC_SUBST(CC_FOR_BUILD)
66 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
69 AC_ARG_ENABLE(werror, [AS_HELP_STRING([--enable-werror],
70 [turns on -Werror @<:@default=yes@:>@])])
71 if test "x$enable_werror" != "xno"; then
77 glibgo_toolexeclibdir=no
79 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
80 AC_ARG_ENABLE([version-specific-runtime-libs],
81 AC_HELP_STRING([--enable-version-specific-runtime-libs],
82 [Specify that runtime libraries should be installed in a compiler-specific directory]),
84 yes) version_specific_libs=yes ;;
85 no) version_specific_libs=no ;;
86 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
88 [version_specific_libs=no])
89 AC_MSG_RESULT($version_specific_libs)
91 GCC_WITH_TOOLEXECLIBDIR
93 # Version-specific runtime libs processing.
94 if test $version_specific_libs = yes; then
95 glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
96 glibgo_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
99 # Calculate glibgo_toolexecdir, glibgo_toolexeclibdir
100 # Install a library built with a cross compiler in tooldir, not libdir.
101 if test -n "$with_cross_host" &&
102 test x"$with_cross_host" != x"no"; then
103 nover_glibgo_toolexecdir='${exec_prefix}/${host_alias}'
104 case ${with_toolexeclibdir} in
106 nover_glibgo_toolexeclibdir='${toolexecdir}/lib'
109 nover_glibgo_toolexeclibdir=${with_toolexeclibdir}
113 nover_glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
114 nover_glibgo_toolexeclibdir='${libdir}'
116 multi_os_directory=`$GOC -print-multi-os-directory`
117 case $multi_os_directory in
118 .) ;; # Avoid trailing /.
119 *) nover_glibgo_toolexeclibdir=${nover_glibgo_toolexeclibdir}/${multi_os_directory} ;;
122 if test x"$glibgo_toolexecdir" = x"no"; then
123 glibgo_toolexecdir="${nover_glibgo_toolexecdir}"
124 glibgo_toolexeclibdir="${nover_glibgo_toolexeclibdir}"
127 AC_SUBST(glibgo_toolexecdir)
128 AC_SUBST(glibgo_toolexeclibdir)
129 AC_SUBST(nover_glibgo_toolexeclibdir)
131 # See if the user wants to configure without libffi. Some
132 # architectures don't support it. FIXME: We should set a default
135 AS_HELP_STRING([--without-libffi],
138 [with_libffi=${with_libffi_default-yes}])
142 if test "$with_libffi" != no; then
143 AC_DEFINE(USE_LIBFFI, 1, [Define if we're to use libffi.])
144 LIBFFI=../libffi/libffi_convenience.la
145 LIBFFIINCS='-I$(top_srcdir)/../libffi/include -I../libffi/include'
149 AM_CONDITIONAL(USE_LIBFFI, test "$with_libffi" != "no")
151 # See if the user wants to configure without libatomic. This is useful if we are
152 # on an architecture for which libgo does not need an atomic support library and
153 # libatomic does not support our C compiler.
154 AC_ARG_WITH(libatomic,
155 AS_HELP_STRING([--without-libatomic],
156 [don't use libatomic]),
158 [with_libatomic=${with_libatomic_default-yes}])
161 if test "$with_libatomic" != no; then
162 LIBATOMIC=../libatomic/libatomic_convenience.la
166 # Used to tell GNU make to include a file without telling automake to
168 go_include="-include"
171 # All known GOOS values. This is the union of all operating systems
172 # supported by the gofrontend and all operating systems supported by
174 ALLGOOS="aix android darwin dragonfly freebsd hurd illumos irix js linux netbsd openbsd plan9 rtems solaris windows"
189 *-*-darwin*) is_darwin=yes; GOOS=darwin ;;
190 *-*-freebsd*) is_freebsd=yes; GOOS=freebsd ;;
191 *-*-irix6*) is_irix=yes; GOOS=irix ;;
192 *-*-linux*) is_linux=yes; GOOS=linux ;;
193 *-*-netbsd*) is_netbsd=yes; GOOS=netbsd ;;
194 *-*-openbsd*) is_openbsd=yes; GOOS=openbsd ;;
195 *-*-dragonfly*) is_dragonfly=yes; GOOS=dragonfly ;;
196 *-*-rtems*) is_rtems=yes; GOOS=rtems ;;
197 *-*-solaris2*) is_solaris=yes; GOOS=solaris ;;
198 *-*-aix*) is_aix=yes; GOOS=aix ;;
199 *-*-gnu*) is_hurd=yes; GOOS=hurd ;;
201 AM_CONDITIONAL(LIBGO_IS_DARWIN, test $is_darwin = yes)
202 AM_CONDITIONAL(LIBGO_IS_FREEBSD, test $is_freebsd = yes)
203 AM_CONDITIONAL(LIBGO_IS_IRIX, test $is_irix = yes)
204 AM_CONDITIONAL(LIBGO_IS_LINUX, test $is_linux = yes)
205 AM_CONDITIONAL(LIBGO_IS_NETBSD, test $is_netbsd = yes)
206 AM_CONDITIONAL(LIBGO_IS_OPENBSD, test $is_openbsd = yes)
207 AM_CONDITIONAL(LIBGO_IS_DRAGONFLY, test $is_dragonfly = yes)
208 AM_CONDITIONAL(LIBGO_IS_RTEMS, test $is_rtems = yes)
209 AM_CONDITIONAL(LIBGO_IS_SOLARIS, test $is_solaris = yes)
210 AM_CONDITIONAL(LIBGO_IS_AIX, test $is_aix = yes)
211 AM_CONDITIONAL(LIBGO_IS_HURD, test $is_hurd = yes)
212 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)
216 dnl Test whether we need to use DejaGNU or whether we can use the
217 dnl simpler gotest approach. We can only use gotest for a native
221 *-*-rtems*) USE_DEJAGNU=yes ;;
223 *) USE_DEJAGNU=yes ;;
225 AC_SUBST(USE_DEJAGNU)
227 # All known GOARCH values. This is the union of all architectures
228 # supported by the gofrontend and all architectures supported by the
230 # To add a new architecture:
231 # - add it to this list
232 # - if appropriate, add an entry to ALLGOARCHFAMILY below
233 # - add an entry to the case on ${host} below to set GOARCH
234 # - update goarchList in libgo/go/go/build/syslist.go
235 # - update goarch.sh to report the values for this architecture
236 # - update go-set-goarch in gcc/testsuite/go.test/go-test.exp
237 # - update ptrSizeMap and intSizeMap in libgo/go/cmd/cgo/main.go
238 # - update arch lists in libgo/match.sh
239 # - update arch lists in libgo/testsuite/gotest
240 # - update +build lines in several places
241 # - libgo/go/runtime/lfstack_NNbit.go
242 # - libgo/go/runtime/hashNN.go
243 # - libgo/go/runtime/unalignedN.go
244 # - libgo/go/syscall/endian_XX.go
246 # - possibly update files in libgo/go/internal/syscall/unix
247 ALLGOARCH="386 alpha amd64 amd64p32 arm armbe arm64 arm64be ia64 m68k mips mipsle mips64 mips64le mips64p32 mips64p32le nios2 ppc ppc64 ppc64le riscv riscv64 s390 s390x sh shbe sparc sparc64 wasm"
249 # All known GOARCH family values.
250 ALLGOARCHFAMILY="I386 ALPHA AMD64 ARM ARM64 IA64 M68K MIPS MIPS64 NIOS2 PPC PPC64 RISCV RISCV64 S390 S390X SH SPARC SPARC64 WASM"
263 arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
272 i[34567]86-*-* | x86_64-*-*)
274 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
280 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
295 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
296 #if _MIPS_SIM != _ABIO32
301 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([
302 #if _MIPS_SIM != _ABIN32
307 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([
308 #if _MIPS_SIM != _ABI64
313 [AC_MSG_ERROR([unknown MIPS ABI])
314 [mips_abi="n32"]])])])
316 "o32") GOARCH=mips ;;
317 "n32") GOARCH=mips64p32 ;;
318 "n64") GOARCH=mips64 ;;
329 rs6000*-*-* | powerpc*-*-*)
330 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
337 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
338 #if defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN__)
346 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
347 #if __riscv_xlen == 64
355 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
356 #if defined(__s390x__)
363 sh3eb*-*-* | sh4eb*-*-*)
370 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
371 #if defined(__sparcv9) || defined(__arch64__)
381 AC_SUBST(ALLGOARCHFAMILY)
383 AM_CONDITIONAL(LIBGO_IS_X86, test "$GOARCH" = "386" -o "$GOARCH" = "amd64" -o "$GOARCH" = "amd64p32")
385 FUNCTION_DESCRIPTORS=false
387 rs6000*-*-* | powerpc*-*-*)
388 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
393 [FUNCTION_DESCRIPTORS=false],
394 [FUNCTION_DESCRIPTORS=true])
397 AC_SUBST(FUNCTION_DESCRIPTORS)
399 dnl Some files are only present when needed for specific architectures.
401 GO_LIBCALL_OS_ARCH_FILE=
403 GO_SYSCALL_OS_ARCH_FILE=
404 if test -f "${srcdir}/go/syscall/libcall_${GOOS}.go"; then
405 GO_LIBCALL_OS_FILE="go/syscall/libcall_${GOOS}.go"
407 if test -f "${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go"; then
408 GO_LIBCALL_OS_ARCH_FILE="go/syscall/libcall_${GOOS}_${GOARCH}.go"
410 if test -f "${srcdir}/go/syscall/syscall_${GOOS}.go"; then
411 GO_SYSCALL_OS_FILE="go/syscall/syscall_${GOOS}.go"
413 if test -f "${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go"; then
414 GO_SYSCALL_OS_ARCH_FILE="go/syscall/syscall_${GOOS}_${GOARCH}.go"
416 AC_SUBST(GO_LIBCALL_OS_FILE)
417 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
418 AC_SUBST(GO_SYSCALL_OS_FILE)
419 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
421 dnl Special flags used to generate sysinfo.go.
422 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
425 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
426 # msghdr in <sys/socket.h>.
427 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
430 # Solaris 10+ needs this so struct msghdr gets the msg_control
431 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
432 # above doesn't work with C99.
433 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
438 dnl Check if assembler supports disabling hardware capability support.
439 GCC_CHECK_ASSEMBLER_HWCAP
441 dnl Use -fsplit-stack when compiling C code if available.
442 AC_CACHE_CHECK([whether -fsplit-stack is supported],
443 [libgo_cv_c_split_stack_supported],
445 CFLAGS="$CFLAGS -fsplit-stack"
446 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
447 [libgo_cv_c_split_stack_supported=yes],
448 [libgo_cv_c_split_stack_supported=no])
449 CFLAGS=$CFLAGS_hold])
451 dnl Make sure the linker permits -fsplit-stack. Old versions of gold will
452 dnl reject split-stack code calling non-split-stack code on targets
453 dnl they don't support.
454 AC_CACHE_CHECK([whether linker supports split/non-split linked together],
455 [libgo_cv_c_linker_split_non_split],
456 [cat > conftest1.c << EOF
458 int main() { f(); return 0; }
460 cat > conftest2.c << EOF
463 $CC -c -fsplit-stack $CFLAGS $CPPFLAGS conftest1.c >/dev/null 2>&1
464 $CC -c $CFLAGS $CPPFLAGS conftest2.c > /dev/null 2>&1
465 if $CC -o conftest conftest1.$ac_objext conftest2.$ac_objext > /dev/null 2>&1; then
466 libgo_cv_c_linker_split_non_split=yes
468 libgo_cv_c_linker_split_non_split=no
470 rm -f conftest1.* conftest2.* conftest])
472 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes; then
473 SPLIT_STACK=-fsplit-stack
474 AC_DEFINE(USING_SPLIT_STACK, 1,
475 [Define if the compiler supports -fsplit-stack])
479 AC_SUBST(SPLIT_STACK)
480 AM_CONDITIONAL(USING_SPLIT_STACK,
481 test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes)
483 dnl If the compiler supports split-stack but the linker does not, then
484 dnl we need to explicitly disable split-stack for Go.
485 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = no; then
486 GO_SPLIT_STACK=-fno-split-stack
490 AC_SUBST(GO_SPLIT_STACK)
492 dnl Check whether the linker does stack munging when calling from
493 dnl split-stack into non-split-stack code. We check this by looking
494 dnl at the --help output. FIXME: This is only half right: it's
495 dnl possible for the linker to support this for some targets but not
497 dnl This is slightly different from the above check, which is whether
498 dnl the linker permits the call at all.
499 AC_CACHE_CHECK([whether linker supports split stack],
500 [libgo_cv_c_linker_supports_split_stack],
501 [libgo_cv_c_linker_supports_split_stack=no
502 if $GOC -Wl,--help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
503 libgo_cv_c_linker_supports_split_stack=yes
505 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
506 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
507 [Define if the linker support split stack adjustments])
510 AC_CACHE_CHECK([whether compiler is llgo],
511 [libgo_cv_c_goc_is_llgo],
512 [libgo_cv_c_goc_is_llgo=no
513 if $GOC -dumpversion 2>/dev/null | grep llgo >/dev/null 2>&1; then
514 libgo_cv_c_goc_is_llgo=yes
516 AM_CONDITIONAL(GOC_IS_LLGO, test "$libgo_cv_c_goc_is_llgo" = yes)
518 dnl Test for the -lm library.
520 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
523 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
524 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
525 [libgo_cv_lib_sockets=
527 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
528 if test "$libgo_check_socket" = "yes"; then
529 unset ac_cv_func_connect
530 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
531 libgo_check_both=yes)
533 if test "$libgo_check_both" = "yes"; then
535 LIBS="$LIBS -lsocket -lnsl"
536 unset ac_cv_func_accept
537 AC_CHECK_FUNC(accept,
539 libgo_cv_lib_sockets="-lsocket -lnsl"])
540 unset ac_cv_func_accept
543 unset ac_cv_func_gethostbyname
544 libgo_old_libs="$LIBS"
545 AC_CHECK_FUNC(gethostbyname, ,
546 [AC_CHECK_LIB(nsl, main,
547 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
548 unset ac_cv_func_gethostbyname
549 AC_CHECK_FUNC(sendfile, ,
550 [AC_CHECK_LIB(sendfile, main,
551 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lsendfile"])])
554 NET_LIBS="$libgo_cv_lib_sockets"
557 dnl Test whether the compiler supports the -pthread option.
558 AC_CACHE_CHECK([whether -pthread is supported],
559 [libgo_cv_lib_pthread],
561 CFLAGS="$CFLAGS -pthread -L../libatomic/.libs"
562 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
563 [libgo_cv_lib_pthread=yes],
564 [libgo_cv_lib_pthread=no])
565 CFLAGS=$CFLAGS_hold])
567 if test "$libgo_cv_lib_pthread" = yes; then
568 # RISC-V apparently adds -latomic when using -pthread.
569 PTHREAD_CFLAGS="-pthread -L../libatomic/.libs"
571 AC_SUBST(PTHREAD_CFLAGS)
573 dnl Test for the -lpthread library.
575 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
576 AC_SUBST(PTHREAD_LIBS)
578 dnl Test if -lrt is required for sched_yield or nanosleep or clock_gettime.
579 AC_SEARCH_LIBS([sched_yield], [rt])
580 AC_SEARCH_LIBS([nanosleep], [rt])
581 AC_SEARCH_LIBS([clock_gettime], [rt])
585 GCC_CHECK_UNWIND_GETIPINFO
587 AC_CHECK_HEADERS(port.h sched.h semaphore.h sys/file.h sys/mman.h syscall.h sys/epoll.h sys/event.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/ptrace.h linux/reboot.h netinet/in_syst.h netinet/ip.h netinet/ip_mroute.h netinet/if_ether.h)
589 AC_CHECK_HEADERS([netinet/icmp6.h], [], [],
590 [#include <netinet/in.h>
593 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
594 [#ifdef HAVE_SYS_SOCKET_H
595 #include <sys/socket.h>
599 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
601 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv unsetenv dl_iterate_phdr memmem)
602 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
603 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
605 AC_CHECK_FUNCS(accept4 dup3 epoll_create1 faccessat fallocate fchmodat fchownat futimesat getxattr inotify_add_watch inotify_init inotify_init1 inotify_rm_watch listxattr mkdirat mknodat open64 openat pipe2 removexattr renameat setxattr sync_file_range splice syscall tee unlinkat unshare utimensat)
607 AC_CHECK_TYPES([loff_t])
611 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
614 CFLAGS_hold="$CFLAGS"
615 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
617 LIBS="$LIBS $PTHREAD_LIBS"
618 AC_CHECK_FUNCS(sem_timedwait)
619 CFLAGS="$CFLAGS_hold"
623 LIBS="$LIBS $MATH_LIBS"
624 AC_CHECK_FUNCS(matherr)
627 dnl For x86 we want to use the -minline-all-stringops option to avoid
628 dnl forcing a stack split when calling memcpy and friends.
629 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
630 [libgo_cv_c_stringops],
632 CFLAGS="$CFLAGS -minline-all-stringops"
633 AC_COMPILE_IFELSE([AC_LANG_SOURCE([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 so that we can use the builtin instructions directly.
645 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
646 [libgo_cv_c_fancymath],
648 CFLAGS="$CFLAGS -mfancy-math-387"
649 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
650 [libgo_cv_c_fancymath=yes],
651 [libgo_cv_c_fancymath=no])
652 CFLAGS=$CFLAGS_hold])
654 if test "$libgo_cv_c_fancymath" = yes; then
655 MATH_FLAG="-mfancy-math-387"
657 MATH_FLAG="${MATH_FLAG} -ffp-contract=off -fno-math-errno -fno-trapping-math"
661 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
662 AC_CHECK_TYPES([off64_t])
665 dnl Work out the size of the epoll_events struct on GNU/Linux.
666 AC_CACHE_CHECK([epoll_event size],
667 [libgo_cv_c_epoll_event_size],
668 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
669 [sizeof (struct epoll_event)],
670 [#include <sys/epoll.h>],
671 [libgo_cv_c_epoll_event_size=0])])
672 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
673 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
675 dnl Work out the offset of the fd field in the epoll_events struct on
677 AC_CACHE_CHECK([epoll_event data.fd offset],
678 [libgo_cv_c_epoll_event_fd_offset],
679 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
680 [offsetof (struct epoll_event, data.fd)],
682 #include <sys/epoll.h>],
683 [libgo_cv_c_epoll_event_fd_offset=0])])
684 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
685 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
687 dnl Check if <sys/stat.h> uses timespec_t for st_?tim members. Introduced
688 dnl in Solaris 11.4 for XPG7 compatibility.
689 AC_EGREP_HEADER([timespec_t.*st_atim], [sys/stat.h],
690 [have_stat_timespec=yes], [have_stat_timespec=no])
691 AM_CONDITIONAL(HAVE_STAT_TIMESPEC, test $have_stat_timespec = yes)
693 dnl See if struct exception is defined in <math.h>.
694 AC_CHECK_TYPE([struct exception],
695 [libgo_has_struct_exception=yes],
696 [libgo_has_struct_exception=no],
698 if test "$libgo_has_struct_exception" = "yes"; then
699 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
700 [Define to 1 if <math.h> defines struct exception])
703 dnl See whether setcontext changes the value of TLS variables.
704 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
705 [libgo_cv_lib_setcontext_clobbers_tls],
706 [CFLAGS_hold="$CFLAGS"
707 CFLAGS="$PTHREAD_CFLAGS"
709 LIBS="$LIBS $PTHREAD_LIBS"
710 AC_CHECK_SIZEOF([void *])
711 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
716 #include <ucontext.h>
721 static char stack[[10 * 1024 * 1024]];
724 /* Called via makecontext/setcontext. */
732 /* Called via pthread_create. */
737 /* The thread should still see this value after calling
743 /* The call to setcontext should not return. */
752 /* The thread should not see this value. */
755 if (getcontext (&c) < 0)
758 c.uc_stack.ss_sp = stack;
759 #ifdef MAKECONTEXT_STACK_TOP
760 c.uc_stack.ss_sp += sizeof stack;
762 c.uc_stack.ss_flags = 0;
763 c.uc_stack.ss_size = sizeof stack;
765 makecontext (&c, cfn, 0);
767 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
770 if (pthread_join (tid, NULL) != 0)
773 /* The thread should have called exit. */
777 [libgo_cv_lib_setcontext_clobbers_tls=no],
778 [libgo_cv_lib_setcontext_clobbers_tls=yes],
779 [case "$target:$ptr_type_size" in
780 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
781 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
783 libgo_cv_lib_setcontext_clobbers_tls=no ;;
786 CFLAGS="$CFLAGS_hold"
789 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
790 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
791 [Define if setcontext clobbers TLS variables])
794 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
795 libgo_cv_ro_eh_frame, [
796 libgo_cv_ro_eh_frame=no
797 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
798 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
799 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
800 libgo_cv_ro_eh_frame=yes
801 elif grep '.section.*eh_frame.*#alloc' conftest.c \
802 | grep -v '#write' > /dev/null; then
803 libgo_cv_ro_eh_frame=yes
808 if test "x$libgo_cv_ro_eh_frame" = xyes; then
809 AC_DEFINE(EH_FRAME_FLAGS, "a",
810 [Define to the flags needed for the .section .eh_frame directive.])
812 AC_DEFINE(EH_FRAME_FLAGS, "aw",
813 [Define to the flags needed for the .section .eh_frame directive.])
816 AC_CACHE_CHECK([if compiler supports -Qunused-arguments],
817 [libgo_cv_c_unused_arguments],
819 CFLAGS="$CFLAGS -Qunused-arguments"
820 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
821 [libgo_cv_c_unused_arguments=yes],
822 [libgo_cv_c_unused_arguments=no])
823 CFLAGS=$CFLAGS_hold])
825 AC_CACHE_CHECK([if assembler supports GNU comdat group syntax],
826 libgo_cv_as_comdat_gnu, [
827 echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s
829 if test "$libgo_cv_c_unused_arguments" = yes; then
830 CFLAGS="$CFLAGS -Qunused-arguments"
832 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
833 libgo_cv_as_comdat_gnu=yes
835 libgo_cv_as_comdat_gnu=no
839 if test "x$libgo_cv_as_comdat_gnu" = xyes; then
840 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1,
841 [Define if your assembler supports GNU comdat group syntax.])
844 AC_CACHE_CHECK([assembler supports pc related relocs],
845 libgo_cv_as_x86_pcrel, [
846 libgo_cv_as_x86_pcrel=yes
847 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
849 if test "$libgo_cv_c_unused_arguments" = yes; then
850 CFLAGS="$CFLAGS -Qunused-arguments"
852 if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
853 libgo_cv_as_x86_pcrel=no
857 if test "x$libgo_cv_as_x86_pcrel" = xyes; then
858 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
859 [Define if your assembler supports PC relative relocs.])
862 AC_CACHE_CHECK([assembler supports unwind section type],
863 libgo_cv_as_x86_64_unwind_section_type, [
864 libgo_cv_as_x86_64_unwind_section_type=yes
865 echo '.section .eh_frame,"a",@unwind' > conftest.s
867 if test "$libgo_cv_c_unused_arguments" = yes; then
868 CFLAGS="$CFLAGS -Qunused-arguments"
870 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
871 libgo_cv_as_x86_64_unwind_section_type=no
875 if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then
876 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
877 [Define if your assembler supports unwind section type.])
880 AC_CACHE_CHECK([assembler supports AES instructions],
881 libgo_cv_as_x86_aes, [
882 libgo_cv_as_x86_aes=yes
883 echo 'aesenc %xmm0, %xmm1' > conftest.s
885 if test "$libgo_cv_c_unused_arguments" = yes; then
886 CFLAGS="$CFLAGS -Qunused-arguments"
888 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i error > /dev/null; then
889 libgo_cv_as_x86_aes=no
893 if test "x$libgo_cv_as_x86_aes" = xyes; then
894 AC_DEFINE(HAVE_AS_X86_AES, 1,
895 [Define if your assembler supports AES instructions.])
898 dnl Test whether the linker supports the -static option.
899 AC_CACHE_CHECK([whether -static is supported],
900 [libgo_cv_ld_static],
901 [LDFLAGS_hold=$LDFLAGS
902 LDFLAGS="$LDFLAGS -static"
903 AC_LINK_IFELSE([AC_LANG_PROGRAM(,)],
904 [libgo_cv_ld_static=yes],
905 [libgo_cv_ld_static=no])
906 LDFLAGS=$LDFLAGS_hold])
907 AM_CONDITIONAL(HAVE_STATIC_LINK, test "$libgo_cv_ld_static" = yes)
911 if test ${multilib} = yes; then
912 multilib_arg="--enable-multilib"
917 AC_CONFIG_FILES(Makefile testsuite/Makefile testsuite/libgo-test-support.exp)
919 AC_CONFIG_COMMANDS([default],
920 [if test -n "$CONFIG_FILES"; then
921 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
922 # that multilib installs will end up installed in the correct place.
923 # The testsuite needs it for multilib-aware ABI baseline files.
924 # To work around this not being passed down from config-ml.in ->
925 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
926 # append it here. Only modify Makefiles that have just been created.
928 # Also, get rid of this simulated-VPATH thing that automake does.
930 s!`test -f '$<' || echo '$(srcdir)/'`!!
932 for i in $SUBDIRS; do
933 case $CONFIG_FILES in
935 #echo "Adding MULTISUBDIR to $i/Makefile"
936 sed -f vpsed $i/Makefile > tmp
937 grep '^MULTISUBDIR =' Makefile >> tmp
946 # Variables needed in config.status (file generation) which aren't already
947 # passed by autoconf.