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 # Check default architecture for FAT library creation
37 if test -z "`$CC -x c -E /dev/null -g3 -o - | grep 64BIT`" ; then
42 AC_SUBST(AIX_EXTRA_ARCH)
50 AC_CHECK_TOOL(OBJCOPY, objcopy, missing-objcopy)
54 AC_SUBST(enable_shared)
55 AC_SUBST(enable_static)
57 CC_FOR_BUILD=${CC_FOR_BUILD:-gcc}
58 AC_SUBST(CC_FOR_BUILD)
62 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
65 AC_ARG_ENABLE(werror, [AS_HELP_STRING([--enable-werror],
66 [turns on -Werror @<:@default=yes@:>@])])
67 if test "x$enable_werror" != "xno"; then
73 glibgo_toolexeclibdir=no
75 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
76 AC_ARG_ENABLE([version-specific-runtime-libs],
77 AC_HELP_STRING([--enable-version-specific-runtime-libs],
78 [Specify that runtime libraries should be installed in a compiler-specific directory]),
80 yes) version_specific_libs=yes ;;
81 no) version_specific_libs=no ;;
82 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
84 [version_specific_libs=no])
85 AC_MSG_RESULT($version_specific_libs)
87 GCC_WITH_TOOLEXECLIBDIR
89 # Version-specific runtime libs processing.
90 if test $version_specific_libs = yes; then
91 glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
92 glibgo_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
95 # Calculate glibgo_toolexecdir, glibgo_toolexeclibdir
96 # Install a library built with a cross compiler in tooldir, not libdir.
97 if test -n "$with_cross_host" &&
98 test x"$with_cross_host" != x"no"; then
99 nover_glibgo_toolexecdir='${exec_prefix}/${host_alias}'
100 case ${with_toolexeclibdir} in
102 nover_glibgo_toolexeclibdir='${toolexecdir}/lib'
105 nover_glibgo_toolexeclibdir=${with_toolexeclibdir}
109 nover_glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
110 nover_glibgo_toolexeclibdir='${libdir}'
112 multi_os_directory=`$GOC -print-multi-os-directory`
113 case $multi_os_directory in
114 .) ;; # Avoid trailing /.
115 *) nover_glibgo_toolexeclibdir=${nover_glibgo_toolexeclibdir}/${multi_os_directory} ;;
118 if test x"$glibgo_toolexecdir" = x"no"; then
119 glibgo_toolexecdir="${nover_glibgo_toolexecdir}"
120 glibgo_toolexeclibdir="${nover_glibgo_toolexeclibdir}"
123 AC_SUBST(glibgo_toolexecdir)
124 AC_SUBST(glibgo_toolexeclibdir)
125 AC_SUBST(nover_glibgo_toolexeclibdir)
127 # See if the user wants to configure without libffi. Some
128 # architectures don't support it. FIXME: We should set a default
131 AS_HELP_STRING([--without-libffi],
134 [with_libffi=${with_libffi_default-yes}])
138 if test "$with_libffi" != no; then
139 AC_DEFINE(USE_LIBFFI, 1, [Define if we're to use libffi.])
140 LIBFFI=../libffi/libffi_convenience.la
141 LIBFFIINCS='-I$(top_srcdir)/../libffi/include -I../libffi/include'
145 AM_CONDITIONAL(USE_LIBFFI, test "$with_libffi" != "no")
147 # See if the user wants to configure without libatomic. This is useful if we are
148 # on an architecture for which libgo does not need an atomic support library and
149 # libatomic does not support our C compiler.
150 AC_ARG_WITH(libatomic,
151 AS_HELP_STRING([--without-libatomic],
152 [don't use libatomic]),
154 [with_libatomic=${with_libatomic_default-yes}])
157 if test "$with_libatomic" != no; then
158 LIBATOMIC=../libatomic/libatomic_convenience.la
162 # Used to tell GNU make to include a file without telling automake to
164 go_include="-include"
167 # All known GOOS values. This is the union of all operating systems
168 # supported by the gofrontend and all operating systems supported by
170 ALLGOOS="aix android darwin dragonfly freebsd hurd illumos irix js linux netbsd openbsd plan9 rtems solaris windows"
185 *-*-darwin*) is_darwin=yes; GOOS=darwin ;;
186 *-*-freebsd*) is_freebsd=yes; GOOS=freebsd ;;
187 *-*-irix6*) is_irix=yes; GOOS=irix ;;
188 *-*-linux*) is_linux=yes; GOOS=linux ;;
189 *-*-netbsd*) is_netbsd=yes; GOOS=netbsd ;;
190 *-*-openbsd*) is_openbsd=yes; GOOS=openbsd ;;
191 *-*-dragonfly*) is_dragonfly=yes; GOOS=dragonfly ;;
192 *-*-rtems*) is_rtems=yes; GOOS=rtems ;;
193 *-*-solaris2*) is_solaris=yes; GOOS=solaris ;;
194 *-*-aix*) is_aix=yes; GOOS=aix ;;
195 *-*-gnu*) is_hurd=yes; GOOS=hurd ;;
197 AM_CONDITIONAL(LIBGO_IS_DARWIN, test $is_darwin = yes)
198 AM_CONDITIONAL(LIBGO_IS_FREEBSD, test $is_freebsd = yes)
199 AM_CONDITIONAL(LIBGO_IS_IRIX, test $is_irix = yes)
200 AM_CONDITIONAL(LIBGO_IS_LINUX, test $is_linux = yes)
201 AM_CONDITIONAL(LIBGO_IS_NETBSD, test $is_netbsd = yes)
202 AM_CONDITIONAL(LIBGO_IS_OPENBSD, test $is_openbsd = yes)
203 AM_CONDITIONAL(LIBGO_IS_DRAGONFLY, test $is_dragonfly = yes)
204 AM_CONDITIONAL(LIBGO_IS_RTEMS, test $is_rtems = yes)
205 AM_CONDITIONAL(LIBGO_IS_SOLARIS, test $is_solaris = yes)
206 AM_CONDITIONAL(LIBGO_IS_AIX, test $is_aix = yes)
207 AM_CONDITIONAL(LIBGO_IS_HURD, test $is_hurd = yes)
208 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)
212 dnl Test whether we need to use DejaGNU or whether we can use the
213 dnl simpler gotest approach. We can only use gotest for a native
217 *-*-rtems*) USE_DEJAGNU=yes ;;
219 *) USE_DEJAGNU=yes ;;
221 AC_SUBST(USE_DEJAGNU)
223 # All known GOARCH values. This is the union of all architectures
224 # supported by the gofrontend and all architectures supported by the
226 # To add a new architecture:
227 # - add it to this list
228 # - if appropriate, add an entry to ALLGOARCHFAMILY below
229 # - add an entry to the case on ${host} below to set GOARCH
230 # - update goarchList in libgo/go/go/build/syslist.go
231 # - update goarch.sh to report the values for this architecture
232 # - update go-set-goarch in gcc/testsuite/go.test/go-test.exp
233 # - update ptrSizeMap and intSizeMap in libgo/go/cmd/cgo/main.go
234 # - update arch lists in libgo/match.sh
235 # - update arch lists in libgo/testsuite/gotest
236 # - update +build lines in several places
237 # - libgo/go/runtime/lfstack_NNbit.go
238 # - libgo/go/runtime/hashNN.go
239 # - libgo/go/runtime/unalignedN.go
240 # - libgo/go/syscall/endian_XX.go
242 # - possibly update files in libgo/go/internal/syscall/unix
243 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"
245 # All known GOARCH family values.
246 ALLGOARCHFAMILY="I386 ALPHA AMD64 ARM ARM64 IA64 M68K MIPS MIPS64 NIOS2 PPC PPC64 RISCV RISCV64 S390 S390X SH SPARC SPARC64 WASM"
259 arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
268 i[34567]86-*-* | x86_64-*-*)
270 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
276 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
291 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
292 #if _MIPS_SIM != _ABIO32
297 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([
298 #if _MIPS_SIM != _ABIN32
303 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([
304 #if _MIPS_SIM != _ABI64
309 [AC_MSG_ERROR([unknown MIPS ABI])
310 [mips_abi="n32"]])])])
312 "o32") GOARCH=mips ;;
313 "n32") GOARCH=mips64p32 ;;
314 "n64") GOARCH=mips64 ;;
325 rs6000*-*-* | powerpc*-*-*)
326 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
333 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
334 #if defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN__)
342 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
343 #if __riscv_xlen == 64
351 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
352 #if defined(__s390x__)
359 sh3eb*-*-* | sh4eb*-*-*)
366 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
367 #if defined(__sparcv9) || defined(__arch64__)
377 AC_SUBST(ALLGOARCHFAMILY)
379 AM_CONDITIONAL(LIBGO_IS_X86, test "$GOARCH" = "386" -o "$GOARCH" = "amd64" -o "$GOARCH" = "amd64p32")
381 FUNCTION_DESCRIPTORS=false
383 rs6000*-*-* | powerpc*-*-*)
384 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
389 [FUNCTION_DESCRIPTORS=false],
390 [FUNCTION_DESCRIPTORS=true])
393 AC_SUBST(FUNCTION_DESCRIPTORS)
395 dnl Some files are only present when needed for specific architectures.
397 GO_LIBCALL_OS_ARCH_FILE=
399 GO_SYSCALL_OS_ARCH_FILE=
400 if test -f "${srcdir}/go/syscall/libcall_${GOOS}.go"; then
401 GO_LIBCALL_OS_FILE="go/syscall/libcall_${GOOS}.go"
403 if test -f "${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go"; then
404 GO_LIBCALL_OS_ARCH_FILE="go/syscall/libcall_${GOOS}_${GOARCH}.go"
406 if test -f "${srcdir}/go/syscall/syscall_${GOOS}.go"; then
407 GO_SYSCALL_OS_FILE="go/syscall/syscall_${GOOS}.go"
409 if test -f "${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go"; then
410 GO_SYSCALL_OS_ARCH_FILE="go/syscall/syscall_${GOOS}_${GOARCH}.go"
412 AC_SUBST(GO_LIBCALL_OS_FILE)
413 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
414 AC_SUBST(GO_SYSCALL_OS_FILE)
415 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
417 dnl Special flags used to generate sysinfo.go.
418 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
421 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
422 # msghdr in <sys/socket.h>.
423 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
426 # Solaris 10+ needs this so struct msghdr gets the msg_control
427 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
428 # above doesn't work with C99.
429 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
434 dnl Check if assembler supports disabling hardware capability support.
435 GCC_CHECK_ASSEMBLER_HWCAP
437 dnl Use -fsplit-stack when compiling C code if available.
438 AC_CACHE_CHECK([whether -fsplit-stack is supported],
439 [libgo_cv_c_split_stack_supported],
441 CFLAGS="$CFLAGS -fsplit-stack"
442 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
443 [libgo_cv_c_split_stack_supported=yes],
444 [libgo_cv_c_split_stack_supported=no])
445 CFLAGS=$CFLAGS_hold])
447 dnl Make sure the linker permits -fsplit-stack. Old versions of gold will
448 dnl reject split-stack code calling non-split-stack code on targets
449 dnl they don't support.
450 AC_CACHE_CHECK([whether linker supports split/non-split linked together],
451 [libgo_cv_c_linker_split_non_split],
452 [cat > conftest1.c << EOF
454 int main() { f(); return 0; }
456 cat > conftest2.c << EOF
459 $CC -c -fsplit-stack $CFLAGS $CPPFLAGS conftest1.c >/dev/null 2>&1
460 $CC -c $CFLAGS $CPPFLAGS conftest2.c > /dev/null 2>&1
461 if $CC -o conftest conftest1.$ac_objext conftest2.$ac_objext > /dev/null 2>&1; then
462 libgo_cv_c_linker_split_non_split=yes
464 libgo_cv_c_linker_split_non_split=no
466 rm -f conftest1.* conftest2.* conftest])
468 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes; then
469 SPLIT_STACK=-fsplit-stack
470 AC_DEFINE(USING_SPLIT_STACK, 1,
471 [Define if the compiler supports -fsplit-stack])
475 AC_SUBST(SPLIT_STACK)
476 AM_CONDITIONAL(USING_SPLIT_STACK,
477 test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes)
479 dnl If the compiler supports split-stack but the linker does not, then
480 dnl we need to explicitly disable split-stack for Go.
481 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = no; then
482 GO_SPLIT_STACK=-fno-split-stack
486 AC_SUBST(GO_SPLIT_STACK)
488 dnl Check whether the linker does stack munging when calling from
489 dnl split-stack into non-split-stack code. We check this by looking
490 dnl at the --help output. FIXME: This is only half right: it's
491 dnl possible for the linker to support this for some targets but not
493 dnl This is slightly different from the above check, which is whether
494 dnl the linker permits the call at all.
495 AC_CACHE_CHECK([whether linker supports split stack],
496 [libgo_cv_c_linker_supports_split_stack],
497 [libgo_cv_c_linker_supports_split_stack=no
498 if $GOC -Wl,--help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
499 libgo_cv_c_linker_supports_split_stack=yes
501 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
502 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
503 [Define if the linker support split stack adjustments])
506 AC_CACHE_CHECK([whether compiler is llgo],
507 [libgo_cv_c_goc_is_llgo],
508 [libgo_cv_c_goc_is_llgo=no
509 if $GOC -dumpversion 2>/dev/null | grep llgo >/dev/null 2>&1; then
510 libgo_cv_c_goc_is_llgo=yes
512 AM_CONDITIONAL(GOC_IS_LLGO, test "$libgo_cv_c_goc_is_llgo" = yes)
514 dnl Test for the -lm library.
516 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
519 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
520 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
521 [libgo_cv_lib_sockets=
523 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
524 if test "$libgo_check_socket" = "yes"; then
525 unset ac_cv_func_connect
526 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
527 libgo_check_both=yes)
529 if test "$libgo_check_both" = "yes"; then
531 LIBS="$LIBS -lsocket -lnsl"
532 unset ac_cv_func_accept
533 AC_CHECK_FUNC(accept,
535 libgo_cv_lib_sockets="-lsocket -lnsl"])
536 unset ac_cv_func_accept
539 unset ac_cv_func_gethostbyname
540 libgo_old_libs="$LIBS"
541 AC_CHECK_FUNC(gethostbyname, ,
542 [AC_CHECK_LIB(nsl, main,
543 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
544 unset ac_cv_func_gethostbyname
545 AC_CHECK_FUNC(sendfile, ,
546 [AC_CHECK_LIB(sendfile, main,
547 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lsendfile"])])
550 NET_LIBS="$libgo_cv_lib_sockets"
553 dnl Test whether the compiler supports the -pthread option.
554 AC_CACHE_CHECK([whether -pthread is supported],
555 [libgo_cv_lib_pthread],
557 CFLAGS="$CFLAGS -pthread -L../libatomic/.libs"
558 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
559 [libgo_cv_lib_pthread=yes],
560 [libgo_cv_lib_pthread=no])
561 CFLAGS=$CFLAGS_hold])
563 if test "$libgo_cv_lib_pthread" = yes; then
564 # RISC-V apparently adds -latomic when using -pthread.
565 PTHREAD_CFLAGS="-pthread -L../libatomic/.libs"
567 AC_SUBST(PTHREAD_CFLAGS)
569 dnl Test for the -lpthread library.
571 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
572 AC_SUBST(PTHREAD_LIBS)
574 dnl Test if -lrt is required for sched_yield or nanosleep or clock_gettime.
575 AC_SEARCH_LIBS([sched_yield], [rt])
576 AC_SEARCH_LIBS([nanosleep], [rt])
577 AC_SEARCH_LIBS([clock_gettime], [rt])
581 GCC_CHECK_UNWIND_GETIPINFO
583 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/sysctl.h sys/user.h sys/utsname.h sys/select.h sys/socket.h net/bpf.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)
585 AC_CHECK_HEADERS([netinet/icmp6.h], [], [],
586 [#include <netinet/in.h>
589 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
590 [#ifdef HAVE_SYS_SOCKET_H
591 #include <sys/socket.h>
595 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
597 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv unsetenv dl_iterate_phdr memmem)
598 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
599 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
601 AC_CHECK_FUNCS(accept4 dup3 epoll_create1 faccessat fallocate fchmodat fchownat futimesat getxattr inotify_add_watch inotify_init inotify_init1 inotify_rm_watch listxattr mkdirat mknodat open64 openat pipe2 removexattr renameat setxattr sync_file_range splice syscall tee unlinkat unshare utimensat)
603 AC_CHECK_TYPES([loff_t])
607 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
610 CFLAGS_hold="$CFLAGS"
611 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
613 LIBS="$LIBS $PTHREAD_LIBS"
614 AC_CHECK_FUNCS(sem_timedwait)
615 CFLAGS="$CFLAGS_hold"
619 LIBS="$LIBS $MATH_LIBS"
620 AC_CHECK_FUNCS(matherr)
623 dnl For x86 we want to use the -minline-all-stringops option to avoid
624 dnl forcing a stack split when calling memcpy and friends.
625 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
626 [libgo_cv_c_stringops],
628 CFLAGS="$CFLAGS -minline-all-stringops"
629 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
630 [libgo_cv_c_stringops=yes],
631 [libgo_cv_c_stringops=no])
632 CFLAGS=$CFLAGS_hold])
634 if test "$libgo_cv_c_stringops" = yes; then
635 STRINGOPS_FLAG=-minline-all-stringops
637 AC_SUBST(STRINGOPS_FLAG)
639 dnl For x86 we want to compile the math library with -mfancy-math-387
640 dnl so that we can use the builtin instructions directly.
641 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
642 [libgo_cv_c_fancymath],
644 CFLAGS="$CFLAGS -mfancy-math-387"
645 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
646 [libgo_cv_c_fancymath=yes],
647 [libgo_cv_c_fancymath=no])
648 CFLAGS=$CFLAGS_hold])
650 if test "$libgo_cv_c_fancymath" = yes; then
651 MATH_FLAG="-mfancy-math-387"
653 MATH_FLAG="${MATH_FLAG} -ffp-contract=off -fno-math-errno -fno-trapping-math"
657 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
658 AC_CHECK_TYPES([off64_t])
661 dnl Work out the size of the epoll_events struct on GNU/Linux.
662 AC_CACHE_CHECK([epoll_event size],
663 [libgo_cv_c_epoll_event_size],
664 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
665 [sizeof (struct epoll_event)],
666 [#include <sys/epoll.h>],
667 [libgo_cv_c_epoll_event_size=0])])
668 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
669 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
671 dnl Work out the offset of the fd field in the epoll_events struct on
673 AC_CACHE_CHECK([epoll_event data.fd offset],
674 [libgo_cv_c_epoll_event_fd_offset],
675 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
676 [offsetof (struct epoll_event, data.fd)],
678 #include <sys/epoll.h>],
679 [libgo_cv_c_epoll_event_fd_offset=0])])
680 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
681 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
683 dnl Check if <sys/stat.h> uses timespec_t for st_?tim members. Introduced
684 dnl in Solaris 11.4 for XPG7 compatibility.
685 AC_EGREP_HEADER([timespec_t.*st_atim], [sys/stat.h],
686 [have_stat_timespec=yes], [have_stat_timespec=no])
687 AM_CONDITIONAL(HAVE_STAT_TIMESPEC, test $have_stat_timespec = yes)
689 dnl See if struct exception is defined in <math.h>.
690 AC_CHECK_TYPE([struct exception],
691 [libgo_has_struct_exception=yes],
692 [libgo_has_struct_exception=no],
694 if test "$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="$CFLAGS -Qunused-arguments"
816 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
817 [libgo_cv_c_unused_arguments=yes],
818 [libgo_cv_c_unused_arguments=no])
819 CFLAGS=$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.])
876 AC_CACHE_CHECK([assembler supports AES instructions],
877 libgo_cv_as_x86_aes, [
878 libgo_cv_as_x86_aes=yes
879 echo 'aesenc %xmm0, %xmm1' > conftest.s
881 if test "$libgo_cv_c_unused_arguments" = yes; then
882 CFLAGS="$CFLAGS -Qunused-arguments"
884 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i error > /dev/null; then
885 libgo_cv_as_x86_aes=no
889 if test "x$libgo_cv_as_x86_aes" = xyes; then
890 AC_DEFINE(HAVE_AS_X86_AES, 1,
891 [Define if your assembler supports AES instructions.])
894 dnl Test whether the linker supports the -static option.
895 AC_CACHE_CHECK([whether -static is supported],
896 [libgo_cv_ld_static],
897 [LDFLAGS_hold=$LDFLAGS
898 LDFLAGS="$LDFLAGS -static"
899 AC_LINK_IFELSE([AC_LANG_PROGRAM(,)],
900 [libgo_cv_ld_static=yes],
901 [libgo_cv_ld_static=no])
902 LDFLAGS=$LDFLAGS_hold])
903 AM_CONDITIONAL(HAVE_STATIC_LINK, test "$libgo_cv_ld_static" = yes)
907 if test ${multilib} = yes; then
908 multilib_arg="--enable-multilib"
913 AC_CONFIG_FILES(Makefile testsuite/Makefile testsuite/libgo-test-support.exp)
915 AC_CONFIG_COMMANDS([default],
916 [if test -n "$CONFIG_FILES"; then
917 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
918 # that multilib installs will end up installed in the correct place.
919 # The testsuite needs it for multilib-aware ABI baseline files.
920 # To work around this not being passed down from config-ml.in ->
921 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
922 # append it here. Only modify Makefiles that have just been created.
924 # Also, get rid of this simulated-VPATH thing that automake does.
926 s!`test -f '$<' || echo '$(srcdir)/'`!!
928 for i in $SUBDIRS; do
929 case $CONFIG_FILES in
931 #echo "Adding MULTISUBDIR to $i/Makefile"
932 sed -f vpsed $i/Makefile > tmp
933 grep '^MULTISUBDIR =' Makefile >> tmp
942 # Variables needed in config.status (file generation) which aren't already
943 # passed by autoconf.