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=14:0:0
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],[])
29 m4_rename_force([glibgo_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
35 # static hash tables crashes on AIX when libgo is built with O2
36 CFLAGS="$CFLAGS -fno-section-anchors"
37 GOCFLAGS="$GOCFLAGS -fno-section-anchors"
45 AC_CHECK_TOOL(OBJCOPY, objcopy, missing-objcopy)
49 AC_SUBST(enable_shared)
50 AC_SUBST(enable_static)
52 CC_FOR_BUILD=${CC_FOR_BUILD:-gcc}
53 AC_SUBST(CC_FOR_BUILD)
57 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
60 AC_ARG_ENABLE(werror, [AS_HELP_STRING([--enable-werror],
61 [turns on -Werror @<:@default=yes@:>@])])
62 if test "x$enable_werror" != "xno"; then
68 glibgo_toolexeclibdir=no
70 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
71 AC_ARG_ENABLE([version-specific-runtime-libs],
72 AC_HELP_STRING([--enable-version-specific-runtime-libs],
73 [Specify that runtime libraries should be installed in a compiler-specific directory]),
75 yes) version_specific_libs=yes ;;
76 no) version_specific_libs=no ;;
77 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
79 [version_specific_libs=no])
80 AC_MSG_RESULT($version_specific_libs)
82 # Version-specific runtime libs processing.
83 if test $version_specific_libs = yes; then
84 glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
85 glibgo_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
88 # Calculate glibgo_toolexecdir, glibgo_toolexeclibdir
89 # Install a library built with a cross compiler in tooldir, not libdir.
90 if test -n "$with_cross_host" &&
91 test x"$with_cross_host" != x"no"; then
92 nover_glibgo_toolexecdir='${exec_prefix}/${host_alias}'
93 nover_glibgo_toolexeclibdir='${toolexecdir}/lib'
95 nover_glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
96 nover_glibgo_toolexeclibdir='${libdir}'
98 multi_os_directory=`$GOC -print-multi-os-directory`
99 case $multi_os_directory in
100 .) ;; # Avoid trailing /.
101 *) nover_glibgo_toolexeclibdir=${nover_glibgo_toolexeclibdir}/${multi_os_directory} ;;
104 if test x"$glibgo_toolexecdir" = x"no"; then
105 glibgo_toolexecdir="${nover_glibgo_toolexecdir}"
106 glibgo_toolexeclibdir="${nover_glibgo_toolexeclibdir}"
109 AC_SUBST(glibgo_toolexecdir)
110 AC_SUBST(glibgo_toolexeclibdir)
111 AC_SUBST(nover_glibgo_toolexeclibdir)
113 # See if the user wants to configure without libffi. Some
114 # architectures don't support it. FIXME: We should set a default
117 AS_HELP_STRING([--without-libffi],
120 [with_libffi=${with_libffi_default-yes}])
124 if test "$with_libffi" != no; then
125 AC_DEFINE(USE_LIBFFI, 1, [Define if we're to use libffi.])
126 LIBFFI=../libffi/libffi_convenience.la
127 LIBFFIINCS='-I$(top_srcdir)/../libffi/include -I../libffi/include'
131 AM_CONDITIONAL(USE_LIBFFI, test "$with_liffi" != "no")
133 # See if the user wants to configure without libatomic. This is useful if we are
134 # on an architecture for which libgo does not need an atomic support library and
135 # libatomic does not support our C compiler.
136 AC_ARG_WITH(libatomic,
137 AS_HELP_STRING([--without-libatomic],
138 [don't use libatomic]),
140 [with_libatomic=${with_libatomic_default-yes}])
143 if test "$with_libatomic" != no; then
144 LIBATOMIC=../libatomic/libatomic_convenience.la
148 # Used to tell GNU make to include a file without telling automake to
150 go_include="-include"
153 # All known GOOS values. This is the union of all operating systems
154 # supported by the gofrontend and all operating systems supported by
156 ALLGOOS="aix android darwin dragonfly freebsd hurd irix js linux netbsd openbsd plan9 rtems solaris windows"
171 *-*-darwin*) is_darwin=yes; GOOS=darwin ;;
172 *-*-freebsd*) is_freebsd=yes; GOOS=freebsd ;;
173 *-*-irix6*) is_irix=yes; GOOS=irix ;;
174 *-*-linux*) is_linux=yes; GOOS=linux ;;
175 *-*-netbsd*) is_netbsd=yes; GOOS=netbsd ;;
176 *-*-openbsd*) is_openbsd=yes; GOOS=openbsd ;;
177 *-*-dragonfly*) is_dragonfly=yes; GOOS=dragonfly ;;
178 *-*-rtems*) is_rtems=yes; GOOS=rtems ;;
179 *-*-solaris2*) is_solaris=yes; GOOS=solaris ;;
180 *-*-aix*) is_aix=yes; GOOS=aix ;;
181 *-*-gnu*) is_hurd=yes; GOOS=hurd ;;
183 AM_CONDITIONAL(LIBGO_IS_DARWIN, test $is_darwin = yes)
184 AM_CONDITIONAL(LIBGO_IS_FREEBSD, test $is_freebsd = yes)
185 AM_CONDITIONAL(LIBGO_IS_IRIX, test $is_irix = yes)
186 AM_CONDITIONAL(LIBGO_IS_LINUX, test $is_linux = yes)
187 AM_CONDITIONAL(LIBGO_IS_NETBSD, test $is_netbsd = yes)
188 AM_CONDITIONAL(LIBGO_IS_OPENBSD, test $is_openbsd = yes)
189 AM_CONDITIONAL(LIBGO_IS_DRAGONFLY, test $is_dragonfly = yes)
190 AM_CONDITIONAL(LIBGO_IS_RTEMS, test $is_rtems = yes)
191 AM_CONDITIONAL(LIBGO_IS_SOLARIS, test $is_solaris = yes)
192 AM_CONDITIONAL(LIBGO_IS_AIX, test $is_aix = yes)
193 AM_CONDITIONAL(LIBGO_IS_HURD, test $is_hurd = yes)
194 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)
198 dnl Test whether we need to use DejaGNU or whether we can use the
199 dnl simpler gotest approach. We can only use gotest for a native
203 *-*-rtems*) USE_DEJAGNU=yes ;;
205 *) USE_DEJAGNU=yes ;;
207 AC_SUBST(USE_DEJAGNU)
209 # All known GOARCH values. This is the union of all architectures
210 # supported by the gofrontend and all architectures supported by the
212 # To add a new architecture:
213 # - add it to this list
214 # - if appropriate, add an entry to ALLGOARCHFAMILY below
215 # - add an entry to the case on ${host} below to set GOARCH
216 # - update goarchList in libgo/go/go/build/syslist.go
217 # - update goarch.sh to report the values for this architecture
218 # - update go-set-goarch in gcc/testsuite/go.test/go-test.exp
219 # - update ptrSizeMap and intSizeMap in libgo/go/cmd/cgo/main.go
220 # - update arch lists in libgo/match.sh
221 # - update arch lists in libgo/testsuite/gotest
222 # - update +build lines in several places
223 # - libgo/go/runtime/lfstack_NNbit.go
224 # - libgo/go/runtime/hashNN.go
225 # - libgo/go/runtime/unalignedN.go
226 # - libgo/go/syscall/endian_XX.go
228 # - possibly update files in libgo/go/internal/syscall/unix
229 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"
231 # All known GOARCH family values.
232 ALLGOARCHFAMILY="I386 ALPHA AMD64 ARM ARM64 IA64 M68K MIPS MIPS64 NIOS2 PPC PPC64 RISCV RISCV64 S390 S390X SH SPARC SPARC64 WASM"
242 arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
251 i[34567]86-*-* | x86_64-*-*)
253 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
259 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
274 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
275 #if _MIPS_SIM != _ABIO32
280 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([
281 #if _MIPS_SIM != _ABIN32
286 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([
287 #if _MIPS_SIM != _ABI64
292 [AC_MSG_ERROR([unknown MIPS ABI])
293 [mips_abi="n32"]])])])
295 "o32") GOARCH=mips ;;
296 "n32") GOARCH=mips64p32 ;;
297 "n64") GOARCH=mips64 ;;
308 rs6000*-*-* | powerpc*-*-*)
309 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
316 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
317 #if defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN__)
328 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
329 #if defined(__s390x__)
336 sh3eb*-*-* | sh4eb*-*-*)
343 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
344 #if defined(__sparcv9) || defined(__arch64__)
354 AC_SUBST(ALLGOARCHFAMILY)
356 dnl Some files are only present when needed for specific architectures.
358 GO_LIBCALL_OS_ARCH_FILE=
360 GO_SYSCALL_OS_ARCH_FILE=
361 if test -f "${srcdir}/go/syscall/libcall_${GOOS}.go"; then
362 GO_LIBCALL_OS_FILE="go/syscall/libcall_${GOOS}.go"
364 if test -f "${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go"; then
365 GO_LIBCALL_OS_ARCH_FILE="go/syscall/libcall_${GOOS}_${GOARCH}.go"
367 if test -f "${srcdir}/go/syscall/syscall_${GOOS}.go"; then
368 GO_SYSCALL_OS_FILE="go/syscall/syscall_${GOOS}.go"
370 if test -f "${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go"; then
371 GO_SYSCALL_OS_ARCH_FILE="go/syscall/syscall_${GOOS}_${GOARCH}.go"
373 AC_SUBST(GO_LIBCALL_OS_FILE)
374 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
375 AC_SUBST(GO_SYSCALL_OS_FILE)
376 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
378 dnl Special flags used to generate sysinfo.go.
379 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
382 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
383 # msghdr in <sys/socket.h>.
384 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
386 *-*-solaris2.1[[01]])
387 # Solaris 10+ needs this so struct msghdr gets the msg_control
388 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
389 # above doesn't work with C99.
390 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
395 dnl Check if assembler supports disabling hardware capability support.
396 GCC_CHECK_ASSEMBLER_HWCAP
398 dnl Use -fsplit-stack when compiling C code if available.
399 AC_CACHE_CHECK([whether -fsplit-stack is supported],
400 [libgo_cv_c_split_stack_supported],
402 CFLAGS="$CFLAGS -fsplit-stack"
403 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
404 [libgo_cv_c_split_stack_supported=yes],
405 [libgo_cv_c_split_stack_supported=no])
406 CFLAGS=$CFLAGS_hold])
408 dnl Make sure the linker permits -fsplit-stack. Old versions of gold will
409 dnl reject split-stack code calling non-split-stack code on targets
410 dnl they don't support.
411 AC_CACHE_CHECK([whether linker supports split/non-split linked together],
412 [libgo_cv_c_linker_split_non_split],
413 [cat > conftest1.c << EOF
415 int main() { f(); return 0; }
417 cat > conftest2.c << EOF
420 $CC -c -fsplit-stack $CFLAGS $CPPFLAGS conftest1.c >/dev/null 2>&1
421 $CC -c $CFLAGS $CPPFLAGS conftest2.c > /dev/null 2>&1
422 if $CC -o conftest conftest1.$ac_objext conftest2.$ac_objext > /dev/null 2>&1; then
423 libgo_cv_c_linker_split_non_split=yes
425 libgo_cv_c_linker_split_non_split=no
427 rm -f conftest1.* conftest2.* conftest])
429 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes; then
430 SPLIT_STACK=-fsplit-stack
431 AC_DEFINE(USING_SPLIT_STACK, 1,
432 [Define if the compiler supports -fsplit-stack])
436 AC_SUBST(SPLIT_STACK)
437 AM_CONDITIONAL(USING_SPLIT_STACK,
438 test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes)
440 dnl If the compiler supports split-stack but the linker does not, then
441 dnl we need to explicitly disable split-stack for Go.
442 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = no; then
443 GO_SPLIT_STACK=-fno-split-stack
447 AC_SUBST(GO_SPLIT_STACK)
449 dnl Check whether the linker does stack munging when calling from
450 dnl split-stack into non-split-stack code. We check this by looking
451 dnl at the --help output. FIXME: This is only half right: it's
452 dnl possible for the linker to support this for some targets but not
454 dnl This is slightly different from the above check, which is whether
455 dnl the linker permits the call at all.
456 AC_CACHE_CHECK([whether linker supports split stack],
457 [libgo_cv_c_linker_supports_split_stack],
458 [libgo_cv_c_linker_supports_split_stack=no
459 if $GOC -Wl,--help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
460 libgo_cv_c_linker_supports_split_stack=yes
462 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
463 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
464 [Define if the linker support split stack adjustments])
467 AC_CACHE_CHECK([whether compiler is llgo],
468 [libgo_cv_c_goc_is_llgo],
469 [libgo_cv_c_goc_is_llgo=no
470 if $GOC -dumpversion 2>/dev/null | grep llgo >/dev/null 2>&1; then
471 libgo_cv_c_goc_is_llgo=yes
473 AM_CONDITIONAL(GOC_IS_LLGO, test "$libgo_cv_c_goc_is_llgo" = yes)
475 dnl Test for the -lm library.
477 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
480 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
481 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
482 [libgo_cv_lib_sockets=
484 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
485 if test "$libgo_check_socket" = "yes"; then
486 unset ac_cv_func_connect
487 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
488 libgo_check_both=yes)
490 if test "$libgo_check_both" = "yes"; then
492 LIBS="$LIBS -lsocket -lnsl"
493 unset ac_cv_func_accept
494 AC_CHECK_FUNC(accept,
496 libgo_cv_lib_sockets="-lsocket -lnsl"])
497 unset ac_cv_func_accept
500 unset ac_cv_func_gethostbyname
501 libgo_old_libs="$LIBS"
502 AC_CHECK_FUNC(gethostbyname, ,
503 [AC_CHECK_LIB(nsl, main,
504 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
505 unset ac_cv_func_gethostbyname
506 AC_CHECK_FUNC(sendfile, ,
507 [AC_CHECK_LIB(sendfile, main,
508 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lsendfile"])])
511 NET_LIBS="$libgo_cv_lib_sockets"
514 dnl Test whether the compiler supports the -pthread option.
515 AC_CACHE_CHECK([whether -pthread is supported],
516 [libgo_cv_lib_pthread],
518 CFLAGS="$CFLAGS -pthread -L../libatomic/.libs"
519 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
520 [libgo_cv_lib_pthread=yes],
521 [libgo_cv_lib_pthread=no])
522 CFLAGS=$CFLAGS_hold])
524 if test "$libgo_cv_lib_pthread" = yes; then
525 # RISC-V apparently adds -latomic when using -pthread.
526 PTHREAD_CFLAGS="-pthread -L../libatomic/.libs"
528 AC_SUBST(PTHREAD_CFLAGS)
530 dnl Test for the -lpthread library.
532 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
533 AC_SUBST(PTHREAD_LIBS)
535 dnl Test if -lrt is required for sched_yield or nanosleep or clock_gettime.
536 AC_SEARCH_LIBS([sched_yield], [rt])
537 AC_SEARCH_LIBS([nanosleep], [rt])
538 AC_SEARCH_LIBS([clock_gettime], [rt])
542 GCC_CHECK_UNWIND_GETIPINFO
544 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)
546 AC_CHECK_HEADERS([netinet/icmp6.h], [], [],
547 [#include <netinet/in.h>
550 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
551 [#ifdef HAVE_SYS_SOCKET_H
552 #include <sys/socket.h>
556 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
558 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv unsetenv dl_iterate_phdr memmem)
559 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
560 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
562 AC_CHECK_FUNCS(accept4 dup3 epoll_create1 faccessat fallocate fchmodat fchownat futimesat getxattr inotify_add_watch inotify_init inotify_init1 inotify_rm_watch listxattr mkdirat mknodat open64 openat pipe2 removexattr renameat setxattr sync_file_range splice syscall tee unlinkat unshare utimensat)
564 AC_CHECK_TYPES([loff_t])
568 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
571 CFLAGS_hold="$CFLAGS"
572 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
574 LIBS="$LIBS $PTHREAD_LIBS"
575 AC_CHECK_FUNCS(sem_timedwait)
576 CFLAGS="$CFLAGS_hold"
580 LIBS="$LIBS $MATH_LIBS"
581 AC_CHECK_FUNCS(matherr)
584 dnl For x86 we want to use the -minline-all-stringops option to avoid
585 dnl forcing a stack split when calling memcpy and friends.
586 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
587 [libgo_cv_c_stringops],
589 CFLAGS="$CFLAGS -minline-all-stringops"
590 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
591 [libgo_cv_c_stringops=yes],
592 [libgo_cv_c_stringops=no])
593 CFLAGS=$CFLAGS_hold])
595 if test "$libgo_cv_c_stringops" = yes; then
596 STRINGOPS_FLAG=-minline-all-stringops
598 AC_SUBST(STRINGOPS_FLAG)
600 dnl For x86 we want to compile the math library with -mfancy-math-387
601 dnl so that we can use the builtin instructions directly.
602 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
603 [libgo_cv_c_fancymath],
605 CFLAGS="$CFLAGS -mfancy-math-387"
606 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
607 [libgo_cv_c_fancymath=yes],
608 [libgo_cv_c_fancymath=no])
609 CFLAGS=$CFLAGS_hold])
611 if test "$libgo_cv_c_fancymath" = yes; then
612 MATH_FLAG="-mfancy-math-387"
614 MATH_FLAG="${MATH_FLAG} -ffp-contract=off -fno-math-errno -fno-trapping-math"
618 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
619 AC_CHECK_TYPES([off64_t])
622 dnl Work out the size of the epoll_events struct on GNU/Linux.
623 AC_CACHE_CHECK([epoll_event size],
624 [libgo_cv_c_epoll_event_size],
625 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
626 [sizeof (struct epoll_event)],
627 [#include <sys/epoll.h>],
628 [libgo_cv_c_epoll_event_size=0])])
629 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
630 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
632 dnl Work out the offset of the fd field in the epoll_events struct on
634 AC_CACHE_CHECK([epoll_event data.fd offset],
635 [libgo_cv_c_epoll_event_fd_offset],
636 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
637 [offsetof (struct epoll_event, data.fd)],
639 #include <sys/epoll.h>],
640 [libgo_cv_c_epoll_event_fd_offset=0])])
641 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
642 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
644 dnl Check if <sys/stat.h> uses timespec_t for st_?tim members. Introduced
645 dnl in Solaris 11.4 for XPG7 compatibility.
646 AC_EGREP_HEADER([timespec_t.*st_atim], [sys/stat.h],
647 [have_stat_timespec=yes], [have_stat_timespec=no])
648 AM_CONDITIONAL(HAVE_STAT_TIMESPEC, test $have_stat_timespec = yes)
650 dnl See if struct exception is defined in <math.h>.
651 AC_CHECK_TYPE([struct exception],
652 [libgo_has_struct_exception=yes],
653 [libgo_has_struct_exception=no],
655 if test "$libgo_has_struct_exception" = "yes"; then
656 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
657 [Define to 1 if <math.h> defines struct exception])
660 dnl See whether setcontext changes the value of TLS variables.
661 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
662 [libgo_cv_lib_setcontext_clobbers_tls],
663 [CFLAGS_hold="$CFLAGS"
664 CFLAGS="$PTHREAD_CFLAGS"
666 LIBS="$LIBS $PTHREAD_LIBS"
667 AC_CHECK_SIZEOF([void *])
668 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
673 #include <ucontext.h>
678 static char stack[[10 * 1024 * 1024]];
681 /* Called via makecontext/setcontext. */
689 /* Called via pthread_create. */
694 /* The thread should still see this value after calling
700 /* The call to setcontext should not return. */
709 /* The thread should not see this value. */
712 if (getcontext (&c) < 0)
715 c.uc_stack.ss_sp = stack;
716 #ifdef MAKECONTEXT_STACK_TOP
717 c.uc_stack.ss_sp += sizeof stack;
719 c.uc_stack.ss_flags = 0;
720 c.uc_stack.ss_size = sizeof stack;
722 makecontext (&c, cfn, 0);
724 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
727 if (pthread_join (tid, NULL) != 0)
730 /* The thread should have called exit. */
734 [libgo_cv_lib_setcontext_clobbers_tls=no],
735 [libgo_cv_lib_setcontext_clobbers_tls=yes],
736 [case "$target:$ptr_type_size" in
737 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
738 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
740 libgo_cv_lib_setcontext_clobbers_tls=no ;;
743 CFLAGS="$CFLAGS_hold"
746 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
747 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
748 [Define if setcontext clobbers TLS variables])
751 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
752 libgo_cv_ro_eh_frame, [
753 libgo_cv_ro_eh_frame=no
754 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
755 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
756 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
757 libgo_cv_ro_eh_frame=yes
758 elif grep '.section.*eh_frame.*#alloc' conftest.c \
759 | grep -v '#write' > /dev/null; then
760 libgo_cv_ro_eh_frame=yes
765 if test "x$libgo_cv_ro_eh_frame" = xyes; then
766 AC_DEFINE(EH_FRAME_FLAGS, "a",
767 [Define to the flags needed for the .section .eh_frame directive.])
769 AC_DEFINE(EH_FRAME_FLAGS, "aw",
770 [Define to the flags needed for the .section .eh_frame directive.])
773 AC_CACHE_CHECK([if compiler supports -Qunused-arguments],
774 [libgo_cv_c_unused_arguments],
776 CFLAGS="$CFLAGS -Qunused-arguments"
777 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
778 [libgo_cv_c_unused_arguments=yes],
779 [libgo_cv_c_unused_arguments=no])
780 CFLAGS=$CFLAGS_hold])
782 AC_CACHE_CHECK([if assembler supports GNU comdat group syntax],
783 libgo_cv_as_comdat_gnu, [
784 echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s
786 if test "$libgo_cv_c_unused_arguments" = yes; then
787 CFLAGS="$CFLAGS -Qunused-arguments"
789 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
790 libgo_cv_as_comdat_gnu=yes
792 libgo_cv_as_comdat_gnu=no
796 if test "x$libgo_cv_as_comdat_gnu" = xyes; then
797 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1,
798 [Define if your assembler supports GNU comdat group syntax.])
801 AC_CACHE_CHECK([assembler supports pc related relocs],
802 libgo_cv_as_x86_pcrel, [
803 libgo_cv_as_x86_pcrel=yes
804 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
806 if test "$libgo_cv_c_unused_arguments" = yes; then
807 CFLAGS="$CFLAGS -Qunused-arguments"
809 if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
810 libgo_cv_as_x86_pcrel=no
814 if test "x$libgo_cv_as_x86_pcrel" = xyes; then
815 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
816 [Define if your assembler supports PC relative relocs.])
819 AC_CACHE_CHECK([assembler supports unwind section type],
820 libgo_cv_as_x86_64_unwind_section_type, [
821 libgo_cv_as_x86_64_unwind_section_type=yes
822 echo '.section .eh_frame,"a",@unwind' > conftest.s
824 if test "$libgo_cv_c_unused_arguments" = yes; then
825 CFLAGS="$CFLAGS -Qunused-arguments"
827 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
828 libgo_cv_as_x86_64_unwind_section_type=no
832 if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then
833 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
834 [Define if your assembler supports unwind section type.])
837 AC_CACHE_CHECK([assembler supports AES instructions],
838 libgo_cv_as_x86_aes, [
839 libgo_cv_as_x86_aes=yes
840 echo 'aesenc %xmm0, %xmm1' > conftest.s
842 if test "$libgo_cv_c_unused_arguments" = yes; then
843 CFLAGS="$CFLAGS -Qunused-arguments"
845 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i error > /dev/null; then
846 libgo_cv_as_x86_aes=no
850 if test "x$libgo_cv_as_x86_aes" = xyes; then
851 AC_DEFINE(HAVE_AS_X86_AES, 1,
852 [Define if your assembler supports AES instructions.])
857 if test ${multilib} = yes; then
858 multilib_arg="--enable-multilib"
863 AC_CONFIG_FILES(Makefile testsuite/Makefile)
865 AC_CONFIG_COMMANDS([default],
866 [if test -n "$CONFIG_FILES"; then
867 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
868 # that multilib installs will end up installed in the correct place.
869 # The testsuite needs it for multilib-aware ABI baseline files.
870 # To work around this not being passed down from config-ml.in ->
871 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
872 # append it here. Only modify Makefiles that have just been created.
874 # Also, get rid of this simulated-VPATH thing that automake does.
876 s!`test -f '$<' || echo '$(srcdir)/'`!!
878 for i in $SUBDIRS; do
879 case $CONFIG_FILES in
881 #echo "Adding MULTISUBDIR to $i/Makefile"
882 sed -f vpsed $i/Makefile > tmp
883 grep '^MULTISUBDIR =' Makefile >> tmp
892 # Variables needed in config.status (file generation) which aren't already
893 # passed by autoconf.