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 FUNCTION_DESCRIPTORS=false
358 rs6000*-*-* | powerpc*-*-*)
359 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
364 [FUNCTION_DESCRIPTORS=false],
365 [FUNCTION_DESCRIPTORS=true])
368 AC_SUBST(FUNCTION_DESCRIPTORS)
370 dnl Some files are only present when needed for specific architectures.
372 GO_LIBCALL_OS_ARCH_FILE=
374 GO_SYSCALL_OS_ARCH_FILE=
375 if test -f "${srcdir}/go/syscall/libcall_${GOOS}.go"; then
376 GO_LIBCALL_OS_FILE="go/syscall/libcall_${GOOS}.go"
378 if test -f "${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go"; then
379 GO_LIBCALL_OS_ARCH_FILE="go/syscall/libcall_${GOOS}_${GOARCH}.go"
381 if test -f "${srcdir}/go/syscall/syscall_${GOOS}.go"; then
382 GO_SYSCALL_OS_FILE="go/syscall/syscall_${GOOS}.go"
384 if test -f "${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go"; then
385 GO_SYSCALL_OS_ARCH_FILE="go/syscall/syscall_${GOOS}_${GOARCH}.go"
387 AC_SUBST(GO_LIBCALL_OS_FILE)
388 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
389 AC_SUBST(GO_SYSCALL_OS_FILE)
390 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
392 dnl Special flags used to generate sysinfo.go.
393 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
396 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
397 # msghdr in <sys/socket.h>.
398 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
400 *-*-solaris2.1[[01]])
401 # Solaris 10+ needs this so struct msghdr gets the msg_control
402 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
403 # above doesn't work with C99.
404 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
409 dnl Check if assembler supports disabling hardware capability support.
410 GCC_CHECK_ASSEMBLER_HWCAP
412 dnl Use -fsplit-stack when compiling C code if available.
413 AC_CACHE_CHECK([whether -fsplit-stack is supported],
414 [libgo_cv_c_split_stack_supported],
416 CFLAGS="$CFLAGS -fsplit-stack"
417 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
418 [libgo_cv_c_split_stack_supported=yes],
419 [libgo_cv_c_split_stack_supported=no])
420 CFLAGS=$CFLAGS_hold])
422 dnl Make sure the linker permits -fsplit-stack. Old versions of gold will
423 dnl reject split-stack code calling non-split-stack code on targets
424 dnl they don't support.
425 AC_CACHE_CHECK([whether linker supports split/non-split linked together],
426 [libgo_cv_c_linker_split_non_split],
427 [cat > conftest1.c << EOF
429 int main() { f(); return 0; }
431 cat > conftest2.c << EOF
434 $CC -c -fsplit-stack $CFLAGS $CPPFLAGS conftest1.c >/dev/null 2>&1
435 $CC -c $CFLAGS $CPPFLAGS conftest2.c > /dev/null 2>&1
436 if $CC -o conftest conftest1.$ac_objext conftest2.$ac_objext > /dev/null 2>&1; then
437 libgo_cv_c_linker_split_non_split=yes
439 libgo_cv_c_linker_split_non_split=no
441 rm -f conftest1.* conftest2.* conftest])
443 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes; then
444 SPLIT_STACK=-fsplit-stack
445 AC_DEFINE(USING_SPLIT_STACK, 1,
446 [Define if the compiler supports -fsplit-stack])
450 AC_SUBST(SPLIT_STACK)
451 AM_CONDITIONAL(USING_SPLIT_STACK,
452 test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes)
454 dnl If the compiler supports split-stack but the linker does not, then
455 dnl we need to explicitly disable split-stack for Go.
456 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = no; then
457 GO_SPLIT_STACK=-fno-split-stack
461 AC_SUBST(GO_SPLIT_STACK)
463 dnl Check whether the linker does stack munging when calling from
464 dnl split-stack into non-split-stack code. We check this by looking
465 dnl at the --help output. FIXME: This is only half right: it's
466 dnl possible for the linker to support this for some targets but not
468 dnl This is slightly different from the above check, which is whether
469 dnl the linker permits the call at all.
470 AC_CACHE_CHECK([whether linker supports split stack],
471 [libgo_cv_c_linker_supports_split_stack],
472 [libgo_cv_c_linker_supports_split_stack=no
473 if $GOC -Wl,--help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
474 libgo_cv_c_linker_supports_split_stack=yes
476 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
477 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
478 [Define if the linker support split stack adjustments])
481 AC_CACHE_CHECK([whether compiler is llgo],
482 [libgo_cv_c_goc_is_llgo],
483 [libgo_cv_c_goc_is_llgo=no
484 if $GOC -dumpversion 2>/dev/null | grep llgo >/dev/null 2>&1; then
485 libgo_cv_c_goc_is_llgo=yes
487 AM_CONDITIONAL(GOC_IS_LLGO, test "$libgo_cv_c_goc_is_llgo" = yes)
489 dnl Test for the -lm library.
491 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
494 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
495 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
496 [libgo_cv_lib_sockets=
498 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
499 if test "$libgo_check_socket" = "yes"; then
500 unset ac_cv_func_connect
501 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
502 libgo_check_both=yes)
504 if test "$libgo_check_both" = "yes"; then
506 LIBS="$LIBS -lsocket -lnsl"
507 unset ac_cv_func_accept
508 AC_CHECK_FUNC(accept,
510 libgo_cv_lib_sockets="-lsocket -lnsl"])
511 unset ac_cv_func_accept
514 unset ac_cv_func_gethostbyname
515 libgo_old_libs="$LIBS"
516 AC_CHECK_FUNC(gethostbyname, ,
517 [AC_CHECK_LIB(nsl, main,
518 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
519 unset ac_cv_func_gethostbyname
520 AC_CHECK_FUNC(sendfile, ,
521 [AC_CHECK_LIB(sendfile, main,
522 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lsendfile"])])
525 NET_LIBS="$libgo_cv_lib_sockets"
528 dnl Test whether the compiler supports the -pthread option.
529 AC_CACHE_CHECK([whether -pthread is supported],
530 [libgo_cv_lib_pthread],
532 CFLAGS="$CFLAGS -pthread -L../libatomic/.libs"
533 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
534 [libgo_cv_lib_pthread=yes],
535 [libgo_cv_lib_pthread=no])
536 CFLAGS=$CFLAGS_hold])
538 if test "$libgo_cv_lib_pthread" = yes; then
539 # RISC-V apparently adds -latomic when using -pthread.
540 PTHREAD_CFLAGS="-pthread -L../libatomic/.libs"
542 AC_SUBST(PTHREAD_CFLAGS)
544 dnl Test for the -lpthread library.
546 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
547 AC_SUBST(PTHREAD_LIBS)
549 dnl Test if -lrt is required for sched_yield or nanosleep or clock_gettime.
550 AC_SEARCH_LIBS([sched_yield], [rt])
551 AC_SEARCH_LIBS([nanosleep], [rt])
552 AC_SEARCH_LIBS([clock_gettime], [rt])
556 GCC_CHECK_UNWIND_GETIPINFO
558 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)
560 AC_CHECK_HEADERS([netinet/icmp6.h], [], [],
561 [#include <netinet/in.h>
564 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
565 [#ifdef HAVE_SYS_SOCKET_H
566 #include <sys/socket.h>
570 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
572 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv unsetenv dl_iterate_phdr memmem)
573 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
574 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
576 AC_CHECK_FUNCS(accept4 dup3 epoll_create1 faccessat fallocate fchmodat fchownat futimesat getxattr inotify_add_watch inotify_init inotify_init1 inotify_rm_watch listxattr mkdirat mknodat open64 openat pipe2 removexattr renameat setxattr sync_file_range splice syscall tee unlinkat unshare utimensat)
578 AC_CHECK_TYPES([loff_t])
582 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
585 CFLAGS_hold="$CFLAGS"
586 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
588 LIBS="$LIBS $PTHREAD_LIBS"
589 AC_CHECK_FUNCS(sem_timedwait)
590 CFLAGS="$CFLAGS_hold"
594 LIBS="$LIBS $MATH_LIBS"
595 AC_CHECK_FUNCS(matherr)
598 dnl For x86 we want to use the -minline-all-stringops option to avoid
599 dnl forcing a stack split when calling memcpy and friends.
600 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
601 [libgo_cv_c_stringops],
603 CFLAGS="$CFLAGS -minline-all-stringops"
604 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
605 [libgo_cv_c_stringops=yes],
606 [libgo_cv_c_stringops=no])
607 CFLAGS=$CFLAGS_hold])
609 if test "$libgo_cv_c_stringops" = yes; then
610 STRINGOPS_FLAG=-minline-all-stringops
612 AC_SUBST(STRINGOPS_FLAG)
614 dnl For x86 we want to compile the math library with -mfancy-math-387
615 dnl so that we can use the builtin instructions directly.
616 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
617 [libgo_cv_c_fancymath],
619 CFLAGS="$CFLAGS -mfancy-math-387"
620 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
621 [libgo_cv_c_fancymath=yes],
622 [libgo_cv_c_fancymath=no])
623 CFLAGS=$CFLAGS_hold])
625 if test "$libgo_cv_c_fancymath" = yes; then
626 MATH_FLAG="-mfancy-math-387"
628 MATH_FLAG="${MATH_FLAG} -ffp-contract=off -fno-math-errno -fno-trapping-math"
632 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
633 AC_CHECK_TYPES([off64_t])
636 dnl Work out the size of the epoll_events struct on GNU/Linux.
637 AC_CACHE_CHECK([epoll_event size],
638 [libgo_cv_c_epoll_event_size],
639 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
640 [sizeof (struct epoll_event)],
641 [#include <sys/epoll.h>],
642 [libgo_cv_c_epoll_event_size=0])])
643 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
644 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
646 dnl Work out the offset of the fd field in the epoll_events struct on
648 AC_CACHE_CHECK([epoll_event data.fd offset],
649 [libgo_cv_c_epoll_event_fd_offset],
650 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
651 [offsetof (struct epoll_event, data.fd)],
653 #include <sys/epoll.h>],
654 [libgo_cv_c_epoll_event_fd_offset=0])])
655 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
656 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
658 dnl Check if <sys/stat.h> uses timespec_t for st_?tim members. Introduced
659 dnl in Solaris 11.4 for XPG7 compatibility.
660 AC_EGREP_HEADER([timespec_t.*st_atim], [sys/stat.h],
661 [have_stat_timespec=yes], [have_stat_timespec=no])
662 AM_CONDITIONAL(HAVE_STAT_TIMESPEC, test $have_stat_timespec = yes)
664 dnl See if struct exception is defined in <math.h>.
665 AC_CHECK_TYPE([struct exception],
666 [libgo_has_struct_exception=yes],
667 [libgo_has_struct_exception=no],
669 if test "$libgo_has_struct_exception" = "yes"; then
670 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
671 [Define to 1 if <math.h> defines struct exception])
674 dnl See whether setcontext changes the value of TLS variables.
675 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
676 [libgo_cv_lib_setcontext_clobbers_tls],
677 [CFLAGS_hold="$CFLAGS"
678 CFLAGS="$PTHREAD_CFLAGS"
680 LIBS="$LIBS $PTHREAD_LIBS"
681 AC_CHECK_SIZEOF([void *])
682 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
687 #include <ucontext.h>
692 static char stack[[10 * 1024 * 1024]];
695 /* Called via makecontext/setcontext. */
703 /* Called via pthread_create. */
708 /* The thread should still see this value after calling
714 /* The call to setcontext should not return. */
723 /* The thread should not see this value. */
726 if (getcontext (&c) < 0)
729 c.uc_stack.ss_sp = stack;
730 #ifdef MAKECONTEXT_STACK_TOP
731 c.uc_stack.ss_sp += sizeof stack;
733 c.uc_stack.ss_flags = 0;
734 c.uc_stack.ss_size = sizeof stack;
736 makecontext (&c, cfn, 0);
738 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
741 if (pthread_join (tid, NULL) != 0)
744 /* The thread should have called exit. */
748 [libgo_cv_lib_setcontext_clobbers_tls=no],
749 [libgo_cv_lib_setcontext_clobbers_tls=yes],
750 [case "$target:$ptr_type_size" in
751 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
752 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
754 libgo_cv_lib_setcontext_clobbers_tls=no ;;
757 CFLAGS="$CFLAGS_hold"
760 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
761 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
762 [Define if setcontext clobbers TLS variables])
765 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
766 libgo_cv_ro_eh_frame, [
767 libgo_cv_ro_eh_frame=no
768 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
769 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
770 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
771 libgo_cv_ro_eh_frame=yes
772 elif grep '.section.*eh_frame.*#alloc' conftest.c \
773 | grep -v '#write' > /dev/null; then
774 libgo_cv_ro_eh_frame=yes
779 if test "x$libgo_cv_ro_eh_frame" = xyes; then
780 AC_DEFINE(EH_FRAME_FLAGS, "a",
781 [Define to the flags needed for the .section .eh_frame directive.])
783 AC_DEFINE(EH_FRAME_FLAGS, "aw",
784 [Define to the flags needed for the .section .eh_frame directive.])
787 AC_CACHE_CHECK([if compiler supports -Qunused-arguments],
788 [libgo_cv_c_unused_arguments],
790 CFLAGS="$CFLAGS -Qunused-arguments"
791 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
792 [libgo_cv_c_unused_arguments=yes],
793 [libgo_cv_c_unused_arguments=no])
794 CFLAGS=$CFLAGS_hold])
796 AC_CACHE_CHECK([if assembler supports GNU comdat group syntax],
797 libgo_cv_as_comdat_gnu, [
798 echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s
800 if test "$libgo_cv_c_unused_arguments" = yes; then
801 CFLAGS="$CFLAGS -Qunused-arguments"
803 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
804 libgo_cv_as_comdat_gnu=yes
806 libgo_cv_as_comdat_gnu=no
810 if test "x$libgo_cv_as_comdat_gnu" = xyes; then
811 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1,
812 [Define if your assembler supports GNU comdat group syntax.])
815 AC_CACHE_CHECK([assembler supports pc related relocs],
816 libgo_cv_as_x86_pcrel, [
817 libgo_cv_as_x86_pcrel=yes
818 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
820 if test "$libgo_cv_c_unused_arguments" = yes; then
821 CFLAGS="$CFLAGS -Qunused-arguments"
823 if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
824 libgo_cv_as_x86_pcrel=no
828 if test "x$libgo_cv_as_x86_pcrel" = xyes; then
829 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
830 [Define if your assembler supports PC relative relocs.])
833 AC_CACHE_CHECK([assembler supports unwind section type],
834 libgo_cv_as_x86_64_unwind_section_type, [
835 libgo_cv_as_x86_64_unwind_section_type=yes
836 echo '.section .eh_frame,"a",@unwind' > conftest.s
838 if test "$libgo_cv_c_unused_arguments" = yes; then
839 CFLAGS="$CFLAGS -Qunused-arguments"
841 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
842 libgo_cv_as_x86_64_unwind_section_type=no
846 if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then
847 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
848 [Define if your assembler supports unwind section type.])
851 AC_CACHE_CHECK([assembler supports AES instructions],
852 libgo_cv_as_x86_aes, [
853 libgo_cv_as_x86_aes=yes
854 echo 'aesenc %xmm0, %xmm1' > conftest.s
856 if test "$libgo_cv_c_unused_arguments" = yes; then
857 CFLAGS="$CFLAGS -Qunused-arguments"
859 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i error > /dev/null; then
860 libgo_cv_as_x86_aes=no
864 if test "x$libgo_cv_as_x86_aes" = xyes; then
865 AC_DEFINE(HAVE_AS_X86_AES, 1,
866 [Define if your assembler supports AES instructions.])
871 if test ${multilib} = yes; then
872 multilib_arg="--enable-multilib"
877 AC_CONFIG_FILES(Makefile testsuite/Makefile)
879 AC_CONFIG_COMMANDS([default],
880 [if test -n "$CONFIG_FILES"; then
881 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
882 # that multilib installs will end up installed in the correct place.
883 # The testsuite needs it for multilib-aware ABI baseline files.
884 # To work around this not being passed down from config-ml.in ->
885 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
886 # append it here. Only modify Makefiles that have just been created.
888 # Also, get rid of this simulated-VPATH thing that automake does.
890 s!`test -f '$<' || echo '$(srcdir)/'`!!
892 for i in $SUBDIRS; do
893 case $CONFIG_FILES in
895 #echo "Adding MULTISUBDIR to $i/Makefile"
896 sed -f vpsed $i/Makefile > tmp
897 grep '^MULTISUBDIR =' Makefile >> tmp
906 # Variables needed in config.status (file generation) which aren't already
907 # passed by autoconf.