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=16:0:0
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"
46 AC_CHECK_TOOL(OBJCOPY, objcopy, missing-objcopy)
50 AC_SUBST(enable_shared)
51 AC_SUBST(enable_static)
53 CC_FOR_BUILD=${CC_FOR_BUILD:-gcc}
54 AC_SUBST(CC_FOR_BUILD)
58 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
61 AC_ARG_ENABLE(werror, [AS_HELP_STRING([--enable-werror],
62 [turns on -Werror @<:@default=yes@:>@])])
63 if test "x$enable_werror" != "xno"; then
69 glibgo_toolexeclibdir=no
71 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
72 AC_ARG_ENABLE([version-specific-runtime-libs],
73 AC_HELP_STRING([--enable-version-specific-runtime-libs],
74 [Specify that runtime libraries should be installed in a compiler-specific directory]),
76 yes) version_specific_libs=yes ;;
77 no) version_specific_libs=no ;;
78 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
80 [version_specific_libs=no])
81 AC_MSG_RESULT($version_specific_libs)
83 # Version-specific runtime libs processing.
84 if test $version_specific_libs = yes; then
85 glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
86 glibgo_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
89 # Calculate glibgo_toolexecdir, glibgo_toolexeclibdir
90 # Install a library built with a cross compiler in tooldir, not libdir.
91 if test -n "$with_cross_host" &&
92 test x"$with_cross_host" != x"no"; then
93 nover_glibgo_toolexecdir='${exec_prefix}/${host_alias}'
94 nover_glibgo_toolexeclibdir='${toolexecdir}/lib'
96 nover_glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
97 nover_glibgo_toolexeclibdir='${libdir}'
99 multi_os_directory=`$GOC -print-multi-os-directory`
100 case $multi_os_directory in
101 .) ;; # Avoid trailing /.
102 *) nover_glibgo_toolexeclibdir=${nover_glibgo_toolexeclibdir}/${multi_os_directory} ;;
105 if test x"$glibgo_toolexecdir" = x"no"; then
106 glibgo_toolexecdir="${nover_glibgo_toolexecdir}"
107 glibgo_toolexeclibdir="${nover_glibgo_toolexeclibdir}"
110 AC_SUBST(glibgo_toolexecdir)
111 AC_SUBST(glibgo_toolexeclibdir)
112 AC_SUBST(nover_glibgo_toolexeclibdir)
114 # See if the user wants to configure without libffi. Some
115 # architectures don't support it. FIXME: We should set a default
118 AS_HELP_STRING([--without-libffi],
121 [with_libffi=${with_libffi_default-yes}])
125 if test "$with_libffi" != no; then
126 AC_DEFINE(USE_LIBFFI, 1, [Define if we're to use libffi.])
127 LIBFFI=../libffi/libffi_convenience.la
128 LIBFFIINCS='-I$(top_srcdir)/../libffi/include -I../libffi/include'
132 AM_CONDITIONAL(USE_LIBFFI, test "$with_libffi" != "no")
134 # See if the user wants to configure without libatomic. This is useful if we are
135 # on an architecture for which libgo does not need an atomic support library and
136 # libatomic does not support our C compiler.
137 AC_ARG_WITH(libatomic,
138 AS_HELP_STRING([--without-libatomic],
139 [don't use libatomic]),
141 [with_libatomic=${with_libatomic_default-yes}])
144 if test "$with_libatomic" != no; then
145 LIBATOMIC=../libatomic/libatomic_convenience.la
149 # Used to tell GNU make to include a file without telling automake to
151 go_include="-include"
154 # All known GOOS values. This is the union of all operating systems
155 # supported by the gofrontend and all operating systems supported by
157 ALLGOOS="aix android darwin dragonfly freebsd hurd illumos irix js linux netbsd openbsd plan9 rtems solaris windows"
172 *-*-darwin*) is_darwin=yes; GOOS=darwin ;;
173 *-*-freebsd*) is_freebsd=yes; GOOS=freebsd ;;
174 *-*-irix6*) is_irix=yes; GOOS=irix ;;
175 *-*-linux*) is_linux=yes; GOOS=linux ;;
176 *-*-netbsd*) is_netbsd=yes; GOOS=netbsd ;;
177 *-*-openbsd*) is_openbsd=yes; GOOS=openbsd ;;
178 *-*-dragonfly*) is_dragonfly=yes; GOOS=dragonfly ;;
179 *-*-rtems*) is_rtems=yes; GOOS=rtems ;;
180 *-*-solaris2*) is_solaris=yes; GOOS=solaris ;;
181 *-*-aix*) is_aix=yes; GOOS=aix ;;
182 *-*-gnu*) is_hurd=yes; GOOS=hurd ;;
184 AM_CONDITIONAL(LIBGO_IS_DARWIN, test $is_darwin = yes)
185 AM_CONDITIONAL(LIBGO_IS_FREEBSD, test $is_freebsd = yes)
186 AM_CONDITIONAL(LIBGO_IS_IRIX, test $is_irix = yes)
187 AM_CONDITIONAL(LIBGO_IS_LINUX, test $is_linux = yes)
188 AM_CONDITIONAL(LIBGO_IS_NETBSD, test $is_netbsd = yes)
189 AM_CONDITIONAL(LIBGO_IS_OPENBSD, test $is_openbsd = yes)
190 AM_CONDITIONAL(LIBGO_IS_DRAGONFLY, test $is_dragonfly = yes)
191 AM_CONDITIONAL(LIBGO_IS_RTEMS, test $is_rtems = yes)
192 AM_CONDITIONAL(LIBGO_IS_SOLARIS, test $is_solaris = yes)
193 AM_CONDITIONAL(LIBGO_IS_AIX, test $is_aix = yes)
194 AM_CONDITIONAL(LIBGO_IS_HURD, test $is_hurd = yes)
195 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)
199 dnl Test whether we need to use DejaGNU or whether we can use the
200 dnl simpler gotest approach. We can only use gotest for a native
204 *-*-rtems*) USE_DEJAGNU=yes ;;
206 *) USE_DEJAGNU=yes ;;
208 AC_SUBST(USE_DEJAGNU)
210 # All known GOARCH values. This is the union of all architectures
211 # supported by the gofrontend and all architectures supported by the
213 # To add a new architecture:
214 # - add it to this list
215 # - if appropriate, add an entry to ALLGOARCHFAMILY below
216 # - add an entry to the case on ${host} below to set GOARCH
217 # - update goarchList in libgo/go/go/build/syslist.go
218 # - update goarch.sh to report the values for this architecture
219 # - update go-set-goarch in gcc/testsuite/go.test/go-test.exp
220 # - update ptrSizeMap and intSizeMap in libgo/go/cmd/cgo/main.go
221 # - update arch lists in libgo/match.sh
222 # - update arch lists in libgo/testsuite/gotest
223 # - update +build lines in several places
224 # - libgo/go/runtime/lfstack_NNbit.go
225 # - libgo/go/runtime/hashNN.go
226 # - libgo/go/runtime/unalignedN.go
227 # - libgo/go/syscall/endian_XX.go
229 # - possibly update files in libgo/go/internal/syscall/unix
230 ALLGOARCH="386 alpha amd64 amd64p32 arm armbe arm64 arm64be ia64 m68k mips mipsle mips64 mips64le mips64p32 mips64p32le nios2 ppc ppc64 ppc64le riscv riscv64 s390 s390x sh shbe sparc sparc64 wasm"
232 # All known GOARCH family values.
233 ALLGOARCHFAMILY="I386 ALPHA AMD64 ARM ARM64 IA64 M68K MIPS MIPS64 NIOS2 PPC PPC64 RISCV RISCV64 S390 S390X SH SPARC SPARC64 WASM"
246 arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
255 i[34567]86-*-* | x86_64-*-*)
257 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
263 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
278 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
279 #if _MIPS_SIM != _ABIO32
284 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([
285 #if _MIPS_SIM != _ABIN32
290 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([
291 #if _MIPS_SIM != _ABI64
296 [AC_MSG_ERROR([unknown MIPS ABI])
297 [mips_abi="n32"]])])])
299 "o32") GOARCH=mips ;;
300 "n32") GOARCH=mips64p32 ;;
301 "n64") GOARCH=mips64 ;;
312 rs6000*-*-* | powerpc*-*-*)
313 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
320 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
321 #if defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN__)
332 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
333 #if defined(__s390x__)
340 sh3eb*-*-* | sh4eb*-*-*)
347 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
348 #if defined(__sparcv9) || defined(__arch64__)
358 AC_SUBST(ALLGOARCHFAMILY)
360 AM_CONDITIONAL(LIBGO_IS_X86, test "$GOARCH" = "386" -o "$GOARCH" = "amd64" -o "$GOARCH" = "amd64p32")
362 FUNCTION_DESCRIPTORS=false
364 rs6000*-*-* | powerpc*-*-*)
365 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
370 [FUNCTION_DESCRIPTORS=false],
371 [FUNCTION_DESCRIPTORS=true])
374 AC_SUBST(FUNCTION_DESCRIPTORS)
376 dnl Some files are only present when needed for specific architectures.
378 GO_LIBCALL_OS_ARCH_FILE=
380 GO_SYSCALL_OS_ARCH_FILE=
381 if test -f "${srcdir}/go/syscall/libcall_${GOOS}.go"; then
382 GO_LIBCALL_OS_FILE="go/syscall/libcall_${GOOS}.go"
384 if test -f "${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go"; then
385 GO_LIBCALL_OS_ARCH_FILE="go/syscall/libcall_${GOOS}_${GOARCH}.go"
387 if test -f "${srcdir}/go/syscall/syscall_${GOOS}.go"; then
388 GO_SYSCALL_OS_FILE="go/syscall/syscall_${GOOS}.go"
390 if test -f "${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go"; then
391 GO_SYSCALL_OS_ARCH_FILE="go/syscall/syscall_${GOOS}_${GOARCH}.go"
393 AC_SUBST(GO_LIBCALL_OS_FILE)
394 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
395 AC_SUBST(GO_SYSCALL_OS_FILE)
396 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
398 dnl Special flags used to generate sysinfo.go.
399 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
402 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
403 # msghdr in <sys/socket.h>.
404 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
407 # Solaris 10+ needs this so struct msghdr gets the msg_control
408 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
409 # above doesn't work with C99.
410 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
415 dnl Check if assembler supports disabling hardware capability support.
416 GCC_CHECK_ASSEMBLER_HWCAP
418 dnl Use -fsplit-stack when compiling C code if available.
419 AC_CACHE_CHECK([whether -fsplit-stack is supported],
420 [libgo_cv_c_split_stack_supported],
422 CFLAGS="$CFLAGS -fsplit-stack"
423 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
424 [libgo_cv_c_split_stack_supported=yes],
425 [libgo_cv_c_split_stack_supported=no])
426 CFLAGS=$CFLAGS_hold])
428 dnl Make sure the linker permits -fsplit-stack. Old versions of gold will
429 dnl reject split-stack code calling non-split-stack code on targets
430 dnl they don't support.
431 AC_CACHE_CHECK([whether linker supports split/non-split linked together],
432 [libgo_cv_c_linker_split_non_split],
433 [cat > conftest1.c << EOF
435 int main() { f(); return 0; }
437 cat > conftest2.c << EOF
440 $CC -c -fsplit-stack $CFLAGS $CPPFLAGS conftest1.c >/dev/null 2>&1
441 $CC -c $CFLAGS $CPPFLAGS conftest2.c > /dev/null 2>&1
442 if $CC -o conftest conftest1.$ac_objext conftest2.$ac_objext > /dev/null 2>&1; then
443 libgo_cv_c_linker_split_non_split=yes
445 libgo_cv_c_linker_split_non_split=no
447 rm -f conftest1.* conftest2.* conftest])
449 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes; then
450 SPLIT_STACK=-fsplit-stack
451 AC_DEFINE(USING_SPLIT_STACK, 1,
452 [Define if the compiler supports -fsplit-stack])
456 AC_SUBST(SPLIT_STACK)
457 AM_CONDITIONAL(USING_SPLIT_STACK,
458 test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes)
460 dnl If the compiler supports split-stack but the linker does not, then
461 dnl we need to explicitly disable split-stack for Go.
462 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = no; then
463 GO_SPLIT_STACK=-fno-split-stack
467 AC_SUBST(GO_SPLIT_STACK)
469 dnl Check whether the linker does stack munging when calling from
470 dnl split-stack into non-split-stack code. We check this by looking
471 dnl at the --help output. FIXME: This is only half right: it's
472 dnl possible for the linker to support this for some targets but not
474 dnl This is slightly different from the above check, which is whether
475 dnl the linker permits the call at all.
476 AC_CACHE_CHECK([whether linker supports split stack],
477 [libgo_cv_c_linker_supports_split_stack],
478 [libgo_cv_c_linker_supports_split_stack=no
479 if $GOC -Wl,--help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
480 libgo_cv_c_linker_supports_split_stack=yes
482 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
483 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
484 [Define if the linker support split stack adjustments])
487 AC_CACHE_CHECK([whether compiler is llgo],
488 [libgo_cv_c_goc_is_llgo],
489 [libgo_cv_c_goc_is_llgo=no
490 if $GOC -dumpversion 2>/dev/null | grep llgo >/dev/null 2>&1; then
491 libgo_cv_c_goc_is_llgo=yes
493 AM_CONDITIONAL(GOC_IS_LLGO, test "$libgo_cv_c_goc_is_llgo" = yes)
495 dnl Test for the -lm library.
497 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
500 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
501 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
502 [libgo_cv_lib_sockets=
504 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
505 if test "$libgo_check_socket" = "yes"; then
506 unset ac_cv_func_connect
507 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
508 libgo_check_both=yes)
510 if test "$libgo_check_both" = "yes"; then
512 LIBS="$LIBS -lsocket -lnsl"
513 unset ac_cv_func_accept
514 AC_CHECK_FUNC(accept,
516 libgo_cv_lib_sockets="-lsocket -lnsl"])
517 unset ac_cv_func_accept
520 unset ac_cv_func_gethostbyname
521 libgo_old_libs="$LIBS"
522 AC_CHECK_FUNC(gethostbyname, ,
523 [AC_CHECK_LIB(nsl, main,
524 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
525 unset ac_cv_func_gethostbyname
526 AC_CHECK_FUNC(sendfile, ,
527 [AC_CHECK_LIB(sendfile, main,
528 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lsendfile"])])
531 NET_LIBS="$libgo_cv_lib_sockets"
534 dnl Test whether the compiler supports the -pthread option.
535 AC_CACHE_CHECK([whether -pthread is supported],
536 [libgo_cv_lib_pthread],
538 CFLAGS="$CFLAGS -pthread -L../libatomic/.libs"
539 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
540 [libgo_cv_lib_pthread=yes],
541 [libgo_cv_lib_pthread=no])
542 CFLAGS=$CFLAGS_hold])
544 if test "$libgo_cv_lib_pthread" = yes; then
545 # RISC-V apparently adds -latomic when using -pthread.
546 PTHREAD_CFLAGS="-pthread -L../libatomic/.libs"
548 AC_SUBST(PTHREAD_CFLAGS)
550 dnl Test for the -lpthread library.
552 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
553 AC_SUBST(PTHREAD_LIBS)
555 dnl Test if -lrt is required for sched_yield or nanosleep or clock_gettime.
556 AC_SEARCH_LIBS([sched_yield], [rt])
557 AC_SEARCH_LIBS([nanosleep], [rt])
558 AC_SEARCH_LIBS([clock_gettime], [rt])
562 GCC_CHECK_UNWIND_GETIPINFO
564 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)
566 AC_CHECK_HEADERS([netinet/icmp6.h], [], [],
567 [#include <netinet/in.h>
570 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
571 [#ifdef HAVE_SYS_SOCKET_H
572 #include <sys/socket.h>
576 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
578 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv unsetenv dl_iterate_phdr memmem)
579 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
580 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
582 AC_CHECK_FUNCS(accept4 dup3 epoll_create1 faccessat fallocate fchmodat fchownat futimesat getxattr inotify_add_watch inotify_init inotify_init1 inotify_rm_watch listxattr mkdirat mknodat open64 openat pipe2 removexattr renameat setxattr sync_file_range splice syscall tee unlinkat unshare utimensat)
584 AC_CHECK_TYPES([loff_t])
588 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
591 CFLAGS_hold="$CFLAGS"
592 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
594 LIBS="$LIBS $PTHREAD_LIBS"
595 AC_CHECK_FUNCS(sem_timedwait)
596 CFLAGS="$CFLAGS_hold"
600 LIBS="$LIBS $MATH_LIBS"
601 AC_CHECK_FUNCS(matherr)
604 dnl For x86 we want to use the -minline-all-stringops option to avoid
605 dnl forcing a stack split when calling memcpy and friends.
606 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
607 [libgo_cv_c_stringops],
609 CFLAGS="$CFLAGS -minline-all-stringops"
610 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
611 [libgo_cv_c_stringops=yes],
612 [libgo_cv_c_stringops=no])
613 CFLAGS=$CFLAGS_hold])
615 if test "$libgo_cv_c_stringops" = yes; then
616 STRINGOPS_FLAG=-minline-all-stringops
618 AC_SUBST(STRINGOPS_FLAG)
620 dnl For x86 we want to compile the math library with -mfancy-math-387
621 dnl so that we can use the builtin instructions directly.
622 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
623 [libgo_cv_c_fancymath],
625 CFLAGS="$CFLAGS -mfancy-math-387"
626 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
627 [libgo_cv_c_fancymath=yes],
628 [libgo_cv_c_fancymath=no])
629 CFLAGS=$CFLAGS_hold])
631 if test "$libgo_cv_c_fancymath" = yes; then
632 MATH_FLAG="-mfancy-math-387"
634 MATH_FLAG="${MATH_FLAG} -ffp-contract=off -fno-math-errno -fno-trapping-math"
638 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
639 AC_CHECK_TYPES([off64_t])
642 dnl Work out the size of the epoll_events struct on GNU/Linux.
643 AC_CACHE_CHECK([epoll_event size],
644 [libgo_cv_c_epoll_event_size],
645 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
646 [sizeof (struct epoll_event)],
647 [#include <sys/epoll.h>],
648 [libgo_cv_c_epoll_event_size=0])])
649 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
650 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
652 dnl Work out the offset of the fd field in the epoll_events struct on
654 AC_CACHE_CHECK([epoll_event data.fd offset],
655 [libgo_cv_c_epoll_event_fd_offset],
656 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
657 [offsetof (struct epoll_event, data.fd)],
659 #include <sys/epoll.h>],
660 [libgo_cv_c_epoll_event_fd_offset=0])])
661 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
662 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
664 dnl Check if <sys/stat.h> uses timespec_t for st_?tim members. Introduced
665 dnl in Solaris 11.4 for XPG7 compatibility.
666 AC_EGREP_HEADER([timespec_t.*st_atim], [sys/stat.h],
667 [have_stat_timespec=yes], [have_stat_timespec=no])
668 AM_CONDITIONAL(HAVE_STAT_TIMESPEC, test $have_stat_timespec = yes)
670 dnl See if struct exception is defined in <math.h>.
671 AC_CHECK_TYPE([struct exception],
672 [libgo_has_struct_exception=yes],
673 [libgo_has_struct_exception=no],
675 if test "$libgo_has_struct_exception" = "yes"; then
676 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
677 [Define to 1 if <math.h> defines struct exception])
680 dnl See whether setcontext changes the value of TLS variables.
681 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
682 [libgo_cv_lib_setcontext_clobbers_tls],
683 [CFLAGS_hold="$CFLAGS"
684 CFLAGS="$PTHREAD_CFLAGS"
686 LIBS="$LIBS $PTHREAD_LIBS"
687 AC_CHECK_SIZEOF([void *])
688 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
693 #include <ucontext.h>
698 static char stack[[10 * 1024 * 1024]];
701 /* Called via makecontext/setcontext. */
709 /* Called via pthread_create. */
714 /* The thread should still see this value after calling
720 /* The call to setcontext should not return. */
729 /* The thread should not see this value. */
732 if (getcontext (&c) < 0)
735 c.uc_stack.ss_sp = stack;
736 #ifdef MAKECONTEXT_STACK_TOP
737 c.uc_stack.ss_sp += sizeof stack;
739 c.uc_stack.ss_flags = 0;
740 c.uc_stack.ss_size = sizeof stack;
742 makecontext (&c, cfn, 0);
744 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
747 if (pthread_join (tid, NULL) != 0)
750 /* The thread should have called exit. */
754 [libgo_cv_lib_setcontext_clobbers_tls=no],
755 [libgo_cv_lib_setcontext_clobbers_tls=yes],
756 [case "$target:$ptr_type_size" in
757 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
758 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
760 libgo_cv_lib_setcontext_clobbers_tls=no ;;
763 CFLAGS="$CFLAGS_hold"
766 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
767 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
768 [Define if setcontext clobbers TLS variables])
771 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
772 libgo_cv_ro_eh_frame, [
773 libgo_cv_ro_eh_frame=no
774 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
775 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
776 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
777 libgo_cv_ro_eh_frame=yes
778 elif grep '.section.*eh_frame.*#alloc' conftest.c \
779 | grep -v '#write' > /dev/null; then
780 libgo_cv_ro_eh_frame=yes
785 if test "x$libgo_cv_ro_eh_frame" = xyes; then
786 AC_DEFINE(EH_FRAME_FLAGS, "a",
787 [Define to the flags needed for the .section .eh_frame directive.])
789 AC_DEFINE(EH_FRAME_FLAGS, "aw",
790 [Define to the flags needed for the .section .eh_frame directive.])
793 AC_CACHE_CHECK([if compiler supports -Qunused-arguments],
794 [libgo_cv_c_unused_arguments],
796 CFLAGS="$CFLAGS -Qunused-arguments"
797 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
798 [libgo_cv_c_unused_arguments=yes],
799 [libgo_cv_c_unused_arguments=no])
800 CFLAGS=$CFLAGS_hold])
802 AC_CACHE_CHECK([if assembler supports GNU comdat group syntax],
803 libgo_cv_as_comdat_gnu, [
804 echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s
806 if test "$libgo_cv_c_unused_arguments" = yes; then
807 CFLAGS="$CFLAGS -Qunused-arguments"
809 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
810 libgo_cv_as_comdat_gnu=yes
812 libgo_cv_as_comdat_gnu=no
816 if test "x$libgo_cv_as_comdat_gnu" = xyes; then
817 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1,
818 [Define if your assembler supports GNU comdat group syntax.])
821 AC_CACHE_CHECK([assembler supports pc related relocs],
822 libgo_cv_as_x86_pcrel, [
823 libgo_cv_as_x86_pcrel=yes
824 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
826 if test "$libgo_cv_c_unused_arguments" = yes; then
827 CFLAGS="$CFLAGS -Qunused-arguments"
829 if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
830 libgo_cv_as_x86_pcrel=no
834 if test "x$libgo_cv_as_x86_pcrel" = xyes; then
835 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
836 [Define if your assembler supports PC relative relocs.])
839 AC_CACHE_CHECK([assembler supports unwind section type],
840 libgo_cv_as_x86_64_unwind_section_type, [
841 libgo_cv_as_x86_64_unwind_section_type=yes
842 echo '.section .eh_frame,"a",@unwind' > conftest.s
844 if test "$libgo_cv_c_unused_arguments" = yes; then
845 CFLAGS="$CFLAGS -Qunused-arguments"
847 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
848 libgo_cv_as_x86_64_unwind_section_type=no
852 if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then
853 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
854 [Define if your assembler supports unwind section type.])
857 AC_CACHE_CHECK([assembler supports AES instructions],
858 libgo_cv_as_x86_aes, [
859 libgo_cv_as_x86_aes=yes
860 echo 'aesenc %xmm0, %xmm1' > conftest.s
862 if test "$libgo_cv_c_unused_arguments" = yes; then
863 CFLAGS="$CFLAGS -Qunused-arguments"
865 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i error > /dev/null; then
866 libgo_cv_as_x86_aes=no
870 if test "x$libgo_cv_as_x86_aes" = xyes; then
871 AC_DEFINE(HAVE_AS_X86_AES, 1,
872 [Define if your assembler supports AES instructions.])
877 if test ${multilib} = yes; then
878 multilib_arg="--enable-multilib"
883 AC_CONFIG_FILES(Makefile testsuite/Makefile testsuite/libgo-test-support.exp)
885 AC_CONFIG_COMMANDS([default],
886 [if test -n "$CONFIG_FILES"; then
887 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
888 # that multilib installs will end up installed in the correct place.
889 # The testsuite needs it for multilib-aware ABI baseline files.
890 # To work around this not being passed down from config-ml.in ->
891 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
892 # append it here. Only modify Makefiles that have just been created.
894 # Also, get rid of this simulated-VPATH thing that automake does.
896 s!`test -f '$<' || echo '$(srcdir)/'`!!
898 for i in $SUBDIRS; do
899 case $CONFIG_FILES in
901 #echo "Adding MULTISUBDIR to $i/Makefile"
902 sed -f vpsed $i/Makefile > tmp
903 grep '^MULTISUBDIR =' Makefile >> tmp
912 # Variables needed in config.status (file generation) which aren't already
913 # passed by autoconf.