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 ${host} below to set GOARCH
234 # - update goarchList in libgo/go/go/build/syslist.go
235 # - update goarch.sh to report the values for this architecture
236 # - update go-set-goarch in gcc/testsuite/go.test/go-test.exp
237 # - update ptrSizeMap and intSizeMap in libgo/go/cmd/cgo/main.go
238 # - update arch lists in libgo/match.sh
239 # - update arch lists in libgo/testsuite/gotest
240 # - update +build lines in several places
241 # - libgo/go/runtime/lfstack_NNbit.go
242 # - libgo/go/runtime/hashNN.go
243 # - libgo/go/runtime/unalignedN.go
244 # - libgo/go/syscall/endian_XX.go
246 # - possibly update files in libgo/go/internal/syscall/unix
247 ALLGOARCH="386 alpha amd64 amd64p32 arm armbe arm64 arm64be ia64 m68k mips mipsle mips64 mips64le mips64p32 mips64p32le nios2 ppc ppc64 ppc64le riscv riscv64 s390 s390x sh shbe sparc sparc64 wasm"
249 # All known GOARCH family values.
250 ALLGOARCHFAMILY="I386 ALPHA AMD64 ARM ARM64 IA64 M68K MIPS MIPS64 NIOS2 PPC PPC64 RISCV RISCV64 S390 S390X SH SPARC SPARC64 WASM"
263 arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
272 i[34567]86-*-* | x86_64-*-*)
274 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
280 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
295 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
296 #if _MIPS_SIM != _ABIO32
301 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([
302 #if _MIPS_SIM != _ABIN32
307 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([
308 #if _MIPS_SIM != _ABI64
313 [AC_MSG_ERROR([unknown MIPS ABI])
314 [mips_abi="n32"]])])])
316 "o32") GOARCH=mips ;;
317 "n32") GOARCH=mips64p32 ;;
318 "n64") GOARCH=mips64 ;;
329 rs6000*-*-* | powerpc*-*-*)
330 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
337 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
338 #if defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN__)
349 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
350 #if defined(__s390x__)
357 sh3eb*-*-* | sh4eb*-*-*)
364 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
365 #if defined(__sparcv9) || defined(__arch64__)
375 AC_SUBST(ALLGOARCHFAMILY)
377 AM_CONDITIONAL(LIBGO_IS_X86, test "$GOARCH" = "386" -o "$GOARCH" = "amd64" -o "$GOARCH" = "amd64p32")
379 FUNCTION_DESCRIPTORS=false
381 rs6000*-*-* | powerpc*-*-*)
382 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
387 [FUNCTION_DESCRIPTORS=false],
388 [FUNCTION_DESCRIPTORS=true])
391 AC_SUBST(FUNCTION_DESCRIPTORS)
393 dnl Some files are only present when needed for specific architectures.
395 GO_LIBCALL_OS_ARCH_FILE=
397 GO_SYSCALL_OS_ARCH_FILE=
398 if test -f "${srcdir}/go/syscall/libcall_${GOOS}.go"; then
399 GO_LIBCALL_OS_FILE="go/syscall/libcall_${GOOS}.go"
401 if test -f "${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go"; then
402 GO_LIBCALL_OS_ARCH_FILE="go/syscall/libcall_${GOOS}_${GOARCH}.go"
404 if test -f "${srcdir}/go/syscall/syscall_${GOOS}.go"; then
405 GO_SYSCALL_OS_FILE="go/syscall/syscall_${GOOS}.go"
407 if test -f "${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go"; then
408 GO_SYSCALL_OS_ARCH_FILE="go/syscall/syscall_${GOOS}_${GOARCH}.go"
410 AC_SUBST(GO_LIBCALL_OS_FILE)
411 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
412 AC_SUBST(GO_SYSCALL_OS_FILE)
413 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
415 dnl Special flags used to generate sysinfo.go.
416 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
419 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
420 # msghdr in <sys/socket.h>.
421 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
424 # Solaris 10+ needs this so struct msghdr gets the msg_control
425 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
426 # above doesn't work with C99.
427 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
432 dnl Check if assembler supports disabling hardware capability support.
433 GCC_CHECK_ASSEMBLER_HWCAP
435 dnl Use -fsplit-stack when compiling C code if available.
436 AC_CACHE_CHECK([whether -fsplit-stack is supported],
437 [libgo_cv_c_split_stack_supported],
439 CFLAGS="$CFLAGS -fsplit-stack"
440 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
441 [libgo_cv_c_split_stack_supported=yes],
442 [libgo_cv_c_split_stack_supported=no])
443 CFLAGS=$CFLAGS_hold])
445 dnl Make sure the linker permits -fsplit-stack. Old versions of gold will
446 dnl reject split-stack code calling non-split-stack code on targets
447 dnl they don't support.
448 AC_CACHE_CHECK([whether linker supports split/non-split linked together],
449 [libgo_cv_c_linker_split_non_split],
450 [cat > conftest1.c << EOF
452 int main() { f(); return 0; }
454 cat > conftest2.c << EOF
457 $CC -c -fsplit-stack $CFLAGS $CPPFLAGS conftest1.c >/dev/null 2>&1
458 $CC -c $CFLAGS $CPPFLAGS conftest2.c > /dev/null 2>&1
459 if $CC -o conftest conftest1.$ac_objext conftest2.$ac_objext > /dev/null 2>&1; then
460 libgo_cv_c_linker_split_non_split=yes
462 libgo_cv_c_linker_split_non_split=no
464 rm -f conftest1.* conftest2.* conftest])
466 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes; then
467 SPLIT_STACK=-fsplit-stack
468 AC_DEFINE(USING_SPLIT_STACK, 1,
469 [Define if the compiler supports -fsplit-stack])
473 AC_SUBST(SPLIT_STACK)
474 AM_CONDITIONAL(USING_SPLIT_STACK,
475 test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes)
477 dnl If the compiler supports split-stack but the linker does not, then
478 dnl we need to explicitly disable split-stack for Go.
479 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = no; then
480 GO_SPLIT_STACK=-fno-split-stack
484 AC_SUBST(GO_SPLIT_STACK)
486 dnl Check whether the linker does stack munging when calling from
487 dnl split-stack into non-split-stack code. We check this by looking
488 dnl at the --help output. FIXME: This is only half right: it's
489 dnl possible for the linker to support this for some targets but not
491 dnl This is slightly different from the above check, which is whether
492 dnl the linker permits the call at all.
493 AC_CACHE_CHECK([whether linker supports split stack],
494 [libgo_cv_c_linker_supports_split_stack],
495 [libgo_cv_c_linker_supports_split_stack=no
496 if $GOC -Wl,--help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
497 libgo_cv_c_linker_supports_split_stack=yes
499 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
500 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
501 [Define if the linker support split stack adjustments])
504 AC_CACHE_CHECK([whether compiler is llgo],
505 [libgo_cv_c_goc_is_llgo],
506 [libgo_cv_c_goc_is_llgo=no
507 if $GOC -dumpversion 2>/dev/null | grep llgo >/dev/null 2>&1; then
508 libgo_cv_c_goc_is_llgo=yes
510 AM_CONDITIONAL(GOC_IS_LLGO, test "$libgo_cv_c_goc_is_llgo" = yes)
512 dnl Test for the -lm library.
514 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
517 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
518 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
519 [libgo_cv_lib_sockets=
521 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
522 if test "$libgo_check_socket" = "yes"; then
523 unset ac_cv_func_connect
524 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
525 libgo_check_both=yes)
527 if test "$libgo_check_both" = "yes"; then
529 LIBS="$LIBS -lsocket -lnsl"
530 unset ac_cv_func_accept
531 AC_CHECK_FUNC(accept,
533 libgo_cv_lib_sockets="-lsocket -lnsl"])
534 unset ac_cv_func_accept
537 unset ac_cv_func_gethostbyname
538 libgo_old_libs="$LIBS"
539 AC_CHECK_FUNC(gethostbyname, ,
540 [AC_CHECK_LIB(nsl, main,
541 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
542 unset ac_cv_func_gethostbyname
543 AC_CHECK_FUNC(sendfile, ,
544 [AC_CHECK_LIB(sendfile, main,
545 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lsendfile"])])
548 NET_LIBS="$libgo_cv_lib_sockets"
551 dnl Test whether the compiler supports the -pthread option.
552 AC_CACHE_CHECK([whether -pthread is supported],
553 [libgo_cv_lib_pthread],
555 CFLAGS="$CFLAGS -pthread -L../libatomic/.libs"
556 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
557 [libgo_cv_lib_pthread=yes],
558 [libgo_cv_lib_pthread=no])
559 CFLAGS=$CFLAGS_hold])
561 if test "$libgo_cv_lib_pthread" = yes; then
562 # RISC-V apparently adds -latomic when using -pthread.
563 PTHREAD_CFLAGS="-pthread -L../libatomic/.libs"
565 AC_SUBST(PTHREAD_CFLAGS)
567 dnl Test for the -lpthread library.
569 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
570 AC_SUBST(PTHREAD_LIBS)
572 dnl Test if -lrt is required for sched_yield or nanosleep or clock_gettime.
573 AC_SEARCH_LIBS([sched_yield], [rt])
574 AC_SEARCH_LIBS([nanosleep], [rt])
575 AC_SEARCH_LIBS([clock_gettime], [rt])
579 GCC_CHECK_UNWIND_GETIPINFO
581 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)
583 AC_CHECK_HEADERS([netinet/icmp6.h], [], [],
584 [#include <netinet/in.h>
587 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
588 [#ifdef HAVE_SYS_SOCKET_H
589 #include <sys/socket.h>
593 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
595 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv unsetenv dl_iterate_phdr memmem)
596 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
597 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
599 AC_CHECK_FUNCS(accept4 dup3 epoll_create1 faccessat fallocate fchmodat fchownat futimesat getxattr inotify_add_watch inotify_init inotify_init1 inotify_rm_watch listxattr mkdirat mknodat open64 openat pipe2 removexattr renameat setxattr sync_file_range splice syscall tee unlinkat unshare utimensat)
601 AC_CHECK_TYPES([loff_t])
605 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
608 CFLAGS_hold="$CFLAGS"
609 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
611 LIBS="$LIBS $PTHREAD_LIBS"
612 AC_CHECK_FUNCS(sem_timedwait)
613 CFLAGS="$CFLAGS_hold"
617 LIBS="$LIBS $MATH_LIBS"
618 AC_CHECK_FUNCS(matherr)
621 dnl For x86 we want to use the -minline-all-stringops option to avoid
622 dnl forcing a stack split when calling memcpy and friends.
623 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
624 [libgo_cv_c_stringops],
626 CFLAGS="$CFLAGS -minline-all-stringops"
627 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
628 [libgo_cv_c_stringops=yes],
629 [libgo_cv_c_stringops=no])
630 CFLAGS=$CFLAGS_hold])
632 if test "$libgo_cv_c_stringops" = yes; then
633 STRINGOPS_FLAG=-minline-all-stringops
635 AC_SUBST(STRINGOPS_FLAG)
637 dnl For x86 we want to compile the math library with -mfancy-math-387
638 dnl so that we can use the builtin instructions directly.
639 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
640 [libgo_cv_c_fancymath],
642 CFLAGS="$CFLAGS -mfancy-math-387"
643 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
644 [libgo_cv_c_fancymath=yes],
645 [libgo_cv_c_fancymath=no])
646 CFLAGS=$CFLAGS_hold])
648 if test "$libgo_cv_c_fancymath" = yes; then
649 MATH_FLAG="-mfancy-math-387"
651 MATH_FLAG="${MATH_FLAG} -ffp-contract=off -fno-math-errno -fno-trapping-math"
655 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
656 AC_CHECK_TYPES([off64_t])
659 dnl Work out the size of the epoll_events struct on GNU/Linux.
660 AC_CACHE_CHECK([epoll_event size],
661 [libgo_cv_c_epoll_event_size],
662 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
663 [sizeof (struct epoll_event)],
664 [#include <sys/epoll.h>],
665 [libgo_cv_c_epoll_event_size=0])])
666 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
667 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
669 dnl Work out the offset of the fd field in the epoll_events struct on
671 AC_CACHE_CHECK([epoll_event data.fd offset],
672 [libgo_cv_c_epoll_event_fd_offset],
673 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
674 [offsetof (struct epoll_event, data.fd)],
676 #include <sys/epoll.h>],
677 [libgo_cv_c_epoll_event_fd_offset=0])])
678 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
679 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
681 dnl Check if <sys/stat.h> uses timespec_t for st_?tim members. Introduced
682 dnl in Solaris 11.4 for XPG7 compatibility.
683 AC_EGREP_HEADER([timespec_t.*st_atim], [sys/stat.h],
684 [have_stat_timespec=yes], [have_stat_timespec=no])
685 AM_CONDITIONAL(HAVE_STAT_TIMESPEC, test $have_stat_timespec = yes)
687 dnl See if struct exception is defined in <math.h>.
688 AC_CHECK_TYPE([struct exception],
689 [libgo_has_struct_exception=yes],
690 [libgo_has_struct_exception=no],
692 if test "$libgo_has_struct_exception" = "yes"; then
693 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
694 [Define to 1 if <math.h> defines struct exception])
697 dnl See whether setcontext changes the value of TLS variables.
698 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
699 [libgo_cv_lib_setcontext_clobbers_tls],
700 [CFLAGS_hold="$CFLAGS"
701 CFLAGS="$PTHREAD_CFLAGS"
703 LIBS="$LIBS $PTHREAD_LIBS"
704 AC_CHECK_SIZEOF([void *])
705 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
710 #include <ucontext.h>
715 static char stack[[10 * 1024 * 1024]];
718 /* Called via makecontext/setcontext. */
726 /* Called via pthread_create. */
731 /* The thread should still see this value after calling
737 /* The call to setcontext should not return. */
746 /* The thread should not see this value. */
749 if (getcontext (&c) < 0)
752 c.uc_stack.ss_sp = stack;
753 #ifdef MAKECONTEXT_STACK_TOP
754 c.uc_stack.ss_sp += sizeof stack;
756 c.uc_stack.ss_flags = 0;
757 c.uc_stack.ss_size = sizeof stack;
759 makecontext (&c, cfn, 0);
761 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
764 if (pthread_join (tid, NULL) != 0)
767 /* The thread should have called exit. */
771 [libgo_cv_lib_setcontext_clobbers_tls=no],
772 [libgo_cv_lib_setcontext_clobbers_tls=yes],
773 [case "$target:$ptr_type_size" in
774 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
775 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
777 libgo_cv_lib_setcontext_clobbers_tls=no ;;
780 CFLAGS="$CFLAGS_hold"
783 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
784 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
785 [Define if setcontext clobbers TLS variables])
788 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
789 libgo_cv_ro_eh_frame, [
790 libgo_cv_ro_eh_frame=no
791 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
792 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
793 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
794 libgo_cv_ro_eh_frame=yes
795 elif grep '.section.*eh_frame.*#alloc' conftest.c \
796 | grep -v '#write' > /dev/null; then
797 libgo_cv_ro_eh_frame=yes
802 if test "x$libgo_cv_ro_eh_frame" = xyes; then
803 AC_DEFINE(EH_FRAME_FLAGS, "a",
804 [Define to the flags needed for the .section .eh_frame directive.])
806 AC_DEFINE(EH_FRAME_FLAGS, "aw",
807 [Define to the flags needed for the .section .eh_frame directive.])
810 AC_CACHE_CHECK([if compiler supports -Qunused-arguments],
811 [libgo_cv_c_unused_arguments],
813 CFLAGS="$CFLAGS -Qunused-arguments"
814 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
815 [libgo_cv_c_unused_arguments=yes],
816 [libgo_cv_c_unused_arguments=no])
817 CFLAGS=$CFLAGS_hold])
819 AC_CACHE_CHECK([if assembler supports GNU comdat group syntax],
820 libgo_cv_as_comdat_gnu, [
821 echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s
823 if test "$libgo_cv_c_unused_arguments" = yes; then
824 CFLAGS="$CFLAGS -Qunused-arguments"
826 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
827 libgo_cv_as_comdat_gnu=yes
829 libgo_cv_as_comdat_gnu=no
833 if test "x$libgo_cv_as_comdat_gnu" = xyes; then
834 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1,
835 [Define if your assembler supports GNU comdat group syntax.])
838 AC_CACHE_CHECK([assembler supports pc related relocs],
839 libgo_cv_as_x86_pcrel, [
840 libgo_cv_as_x86_pcrel=yes
841 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
843 if test "$libgo_cv_c_unused_arguments" = yes; then
844 CFLAGS="$CFLAGS -Qunused-arguments"
846 if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
847 libgo_cv_as_x86_pcrel=no
851 if test "x$libgo_cv_as_x86_pcrel" = xyes; then
852 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
853 [Define if your assembler supports PC relative relocs.])
856 AC_CACHE_CHECK([assembler supports unwind section type],
857 libgo_cv_as_x86_64_unwind_section_type, [
858 libgo_cv_as_x86_64_unwind_section_type=yes
859 echo '.section .eh_frame,"a",@unwind' > conftest.s
861 if test "$libgo_cv_c_unused_arguments" = yes; then
862 CFLAGS="$CFLAGS -Qunused-arguments"
864 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
865 libgo_cv_as_x86_64_unwind_section_type=no
869 if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then
870 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
871 [Define if your assembler supports unwind section type.])
874 AC_CACHE_CHECK([assembler supports AES instructions],
875 libgo_cv_as_x86_aes, [
876 libgo_cv_as_x86_aes=yes
877 echo 'aesenc %xmm0, %xmm1' > conftest.s
879 if test "$libgo_cv_c_unused_arguments" = yes; then
880 CFLAGS="$CFLAGS -Qunused-arguments"
882 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i error > /dev/null; then
883 libgo_cv_as_x86_aes=no
887 if test "x$libgo_cv_as_x86_aes" = xyes; then
888 AC_DEFINE(HAVE_AS_X86_AES, 1,
889 [Define if your assembler supports AES instructions.])
892 dnl Test whether the linker supports the -static option.
893 AC_CACHE_CHECK([whether -static is supported],
894 [libgo_cv_ld_static],
895 [LDFLAGS_hold=$LDFLAGS
896 LDFLAGS="$LDFLAGS -static"
897 AC_LINK_IFELSE([AC_LANG_PROGRAM(,)],
898 [libgo_cv_ld_static=yes],
899 [libgo_cv_ld_static=no])
900 LDFLAGS=$LDFLAGS_hold])
901 AM_CONDITIONAL(HAVE_STATIC_LINK, test "$libgo_cv_ld_static" = yes)
905 if test ${multilib} = yes; then
906 multilib_arg="--enable-multilib"
911 AC_CONFIG_FILES(Makefile testsuite/Makefile testsuite/libgo-test-support.exp)
913 AC_CONFIG_COMMANDS([default],
914 [if test -n "$CONFIG_FILES"; then
915 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
916 # that multilib installs will end up installed in the correct place.
917 # The testsuite needs it for multilib-aware ABI baseline files.
918 # To work around this not being passed down from config-ml.in ->
919 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
920 # append it here. Only modify Makefiles that have just been created.
922 # Also, get rid of this simulated-VPATH thing that automake does.
924 s!`test -f '$<' || echo '$(srcdir)/'`!!
926 for i in $SUBDIRS; do
927 case $CONFIG_FILES in
929 #echo "Adding MULTISUBDIR to $i/Makefile"
930 sed -f vpsed $i/Makefile > tmp
931 grep '^MULTISUBDIR =' Makefile >> tmp
940 # Variables needed in config.status (file generation) which aren't already
941 # passed by autoconf.