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=15:0:0
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"
243 arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
252 i[34567]86-*-* | x86_64-*-*)
254 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
260 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
275 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
276 #if _MIPS_SIM != _ABIO32
281 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([
282 #if _MIPS_SIM != _ABIN32
287 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([
288 #if _MIPS_SIM != _ABI64
293 [AC_MSG_ERROR([unknown MIPS ABI])
294 [mips_abi="n32"]])])])
296 "o32") GOARCH=mips ;;
297 "n32") GOARCH=mips64p32 ;;
298 "n64") GOARCH=mips64 ;;
309 rs6000*-*-* | powerpc*-*-*)
310 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
317 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
318 #if defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN__)
329 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
330 #if defined(__s390x__)
337 sh3eb*-*-* | sh4eb*-*-*)
344 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
345 #if defined(__sparcv9) || defined(__arch64__)
355 AC_SUBST(ALLGOARCHFAMILY)
357 FUNCTION_DESCRIPTORS=false
359 rs6000*-*-* | powerpc*-*-*)
360 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
365 [FUNCTION_DESCRIPTORS=false],
366 [FUNCTION_DESCRIPTORS=true])
369 AC_SUBST(FUNCTION_DESCRIPTORS)
371 dnl Some files are only present when needed for specific architectures.
373 GO_LIBCALL_OS_ARCH_FILE=
375 GO_SYSCALL_OS_ARCH_FILE=
376 if test -f "${srcdir}/go/syscall/libcall_${GOOS}.go"; then
377 GO_LIBCALL_OS_FILE="go/syscall/libcall_${GOOS}.go"
379 if test -f "${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go"; then
380 GO_LIBCALL_OS_ARCH_FILE="go/syscall/libcall_${GOOS}_${GOARCH}.go"
382 if test -f "${srcdir}/go/syscall/syscall_${GOOS}.go"; then
383 GO_SYSCALL_OS_FILE="go/syscall/syscall_${GOOS}.go"
385 if test -f "${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go"; then
386 GO_SYSCALL_OS_ARCH_FILE="go/syscall/syscall_${GOOS}_${GOARCH}.go"
388 AC_SUBST(GO_LIBCALL_OS_FILE)
389 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
390 AC_SUBST(GO_SYSCALL_OS_FILE)
391 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
393 dnl Special flags used to generate sysinfo.go.
394 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
397 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
398 # msghdr in <sys/socket.h>.
399 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
402 # Solaris 10+ needs this so struct msghdr gets the msg_control
403 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
404 # above doesn't work with C99.
405 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
410 dnl Check if assembler supports disabling hardware capability support.
411 GCC_CHECK_ASSEMBLER_HWCAP
413 dnl Use -fsplit-stack when compiling C code if available.
414 AC_CACHE_CHECK([whether -fsplit-stack is supported],
415 [libgo_cv_c_split_stack_supported],
417 CFLAGS="$CFLAGS -fsplit-stack"
418 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
419 [libgo_cv_c_split_stack_supported=yes],
420 [libgo_cv_c_split_stack_supported=no])
421 CFLAGS=$CFLAGS_hold])
423 dnl Make sure the linker permits -fsplit-stack. Old versions of gold will
424 dnl reject split-stack code calling non-split-stack code on targets
425 dnl they don't support.
426 AC_CACHE_CHECK([whether linker supports split/non-split linked together],
427 [libgo_cv_c_linker_split_non_split],
428 [cat > conftest1.c << EOF
430 int main() { f(); return 0; }
432 cat > conftest2.c << EOF
435 $CC -c -fsplit-stack $CFLAGS $CPPFLAGS conftest1.c >/dev/null 2>&1
436 $CC -c $CFLAGS $CPPFLAGS conftest2.c > /dev/null 2>&1
437 if $CC -o conftest conftest1.$ac_objext conftest2.$ac_objext > /dev/null 2>&1; then
438 libgo_cv_c_linker_split_non_split=yes
440 libgo_cv_c_linker_split_non_split=no
442 rm -f conftest1.* conftest2.* conftest])
444 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes; then
445 SPLIT_STACK=-fsplit-stack
446 AC_DEFINE(USING_SPLIT_STACK, 1,
447 [Define if the compiler supports -fsplit-stack])
451 AC_SUBST(SPLIT_STACK)
452 AM_CONDITIONAL(USING_SPLIT_STACK,
453 test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes)
455 dnl If the compiler supports split-stack but the linker does not, then
456 dnl we need to explicitly disable split-stack for Go.
457 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = no; then
458 GO_SPLIT_STACK=-fno-split-stack
462 AC_SUBST(GO_SPLIT_STACK)
464 dnl Check whether the linker does stack munging when calling from
465 dnl split-stack into non-split-stack code. We check this by looking
466 dnl at the --help output. FIXME: This is only half right: it's
467 dnl possible for the linker to support this for some targets but not
469 dnl This is slightly different from the above check, which is whether
470 dnl the linker permits the call at all.
471 AC_CACHE_CHECK([whether linker supports split stack],
472 [libgo_cv_c_linker_supports_split_stack],
473 [libgo_cv_c_linker_supports_split_stack=no
474 if $GOC -Wl,--help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
475 libgo_cv_c_linker_supports_split_stack=yes
477 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
478 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
479 [Define if the linker support split stack adjustments])
482 AC_CACHE_CHECK([whether compiler is llgo],
483 [libgo_cv_c_goc_is_llgo],
484 [libgo_cv_c_goc_is_llgo=no
485 if $GOC -dumpversion 2>/dev/null | grep llgo >/dev/null 2>&1; then
486 libgo_cv_c_goc_is_llgo=yes
488 AM_CONDITIONAL(GOC_IS_LLGO, test "$libgo_cv_c_goc_is_llgo" = yes)
490 dnl Test for the -lm library.
492 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
495 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
496 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
497 [libgo_cv_lib_sockets=
499 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
500 if test "$libgo_check_socket" = "yes"; then
501 unset ac_cv_func_connect
502 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
503 libgo_check_both=yes)
505 if test "$libgo_check_both" = "yes"; then
507 LIBS="$LIBS -lsocket -lnsl"
508 unset ac_cv_func_accept
509 AC_CHECK_FUNC(accept,
511 libgo_cv_lib_sockets="-lsocket -lnsl"])
512 unset ac_cv_func_accept
515 unset ac_cv_func_gethostbyname
516 libgo_old_libs="$LIBS"
517 AC_CHECK_FUNC(gethostbyname, ,
518 [AC_CHECK_LIB(nsl, main,
519 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
520 unset ac_cv_func_gethostbyname
521 AC_CHECK_FUNC(sendfile, ,
522 [AC_CHECK_LIB(sendfile, main,
523 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lsendfile"])])
526 NET_LIBS="$libgo_cv_lib_sockets"
529 dnl Test whether the compiler supports the -pthread option.
530 AC_CACHE_CHECK([whether -pthread is supported],
531 [libgo_cv_lib_pthread],
533 CFLAGS="$CFLAGS -pthread -L../libatomic/.libs"
534 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
535 [libgo_cv_lib_pthread=yes],
536 [libgo_cv_lib_pthread=no])
537 CFLAGS=$CFLAGS_hold])
539 if test "$libgo_cv_lib_pthread" = yes; then
540 # RISC-V apparently adds -latomic when using -pthread.
541 PTHREAD_CFLAGS="-pthread -L../libatomic/.libs"
543 AC_SUBST(PTHREAD_CFLAGS)
545 dnl Test for the -lpthread library.
547 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
548 AC_SUBST(PTHREAD_LIBS)
550 dnl Test if -lrt is required for sched_yield or nanosleep or clock_gettime.
551 AC_SEARCH_LIBS([sched_yield], [rt])
552 AC_SEARCH_LIBS([nanosleep], [rt])
553 AC_SEARCH_LIBS([clock_gettime], [rt])
557 GCC_CHECK_UNWIND_GETIPINFO
559 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)
561 AC_CHECK_HEADERS([netinet/icmp6.h], [], [],
562 [#include <netinet/in.h>
565 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
566 [#ifdef HAVE_SYS_SOCKET_H
567 #include <sys/socket.h>
571 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
573 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv unsetenv dl_iterate_phdr memmem)
574 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
575 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
577 AC_CHECK_FUNCS(accept4 dup3 epoll_create1 faccessat fallocate fchmodat fchownat futimesat getxattr inotify_add_watch inotify_init inotify_init1 inotify_rm_watch listxattr mkdirat mknodat open64 openat pipe2 removexattr renameat setxattr sync_file_range splice syscall tee unlinkat unshare utimensat)
579 AC_CHECK_TYPES([loff_t])
583 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
586 CFLAGS_hold="$CFLAGS"
587 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
589 LIBS="$LIBS $PTHREAD_LIBS"
590 AC_CHECK_FUNCS(sem_timedwait)
591 CFLAGS="$CFLAGS_hold"
595 LIBS="$LIBS $MATH_LIBS"
596 AC_CHECK_FUNCS(matherr)
599 dnl For x86 we want to use the -minline-all-stringops option to avoid
600 dnl forcing a stack split when calling memcpy and friends.
601 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
602 [libgo_cv_c_stringops],
604 CFLAGS="$CFLAGS -minline-all-stringops"
605 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
606 [libgo_cv_c_stringops=yes],
607 [libgo_cv_c_stringops=no])
608 CFLAGS=$CFLAGS_hold])
610 if test "$libgo_cv_c_stringops" = yes; then
611 STRINGOPS_FLAG=-minline-all-stringops
613 AC_SUBST(STRINGOPS_FLAG)
615 dnl For x86 we want to compile the math library with -mfancy-math-387
616 dnl so that we can use the builtin instructions directly.
617 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
618 [libgo_cv_c_fancymath],
620 CFLAGS="$CFLAGS -mfancy-math-387"
621 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
622 [libgo_cv_c_fancymath=yes],
623 [libgo_cv_c_fancymath=no])
624 CFLAGS=$CFLAGS_hold])
626 if test "$libgo_cv_c_fancymath" = yes; then
627 MATH_FLAG="-mfancy-math-387"
629 MATH_FLAG="${MATH_FLAG} -ffp-contract=off -fno-math-errno -fno-trapping-math"
633 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
634 AC_CHECK_TYPES([off64_t])
637 dnl Work out the size of the epoll_events struct on GNU/Linux.
638 AC_CACHE_CHECK([epoll_event size],
639 [libgo_cv_c_epoll_event_size],
640 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
641 [sizeof (struct epoll_event)],
642 [#include <sys/epoll.h>],
643 [libgo_cv_c_epoll_event_size=0])])
644 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
645 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
647 dnl Work out the offset of the fd field in the epoll_events struct on
649 AC_CACHE_CHECK([epoll_event data.fd offset],
650 [libgo_cv_c_epoll_event_fd_offset],
651 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
652 [offsetof (struct epoll_event, data.fd)],
654 #include <sys/epoll.h>],
655 [libgo_cv_c_epoll_event_fd_offset=0])])
656 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
657 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
659 dnl Check if <sys/stat.h> uses timespec_t for st_?tim members. Introduced
660 dnl in Solaris 11.4 for XPG7 compatibility.
661 AC_EGREP_HEADER([timespec_t.*st_atim], [sys/stat.h],
662 [have_stat_timespec=yes], [have_stat_timespec=no])
663 AM_CONDITIONAL(HAVE_STAT_TIMESPEC, test $have_stat_timespec = yes)
665 dnl See if struct exception is defined in <math.h>.
666 AC_CHECK_TYPE([struct exception],
667 [libgo_has_struct_exception=yes],
668 [libgo_has_struct_exception=no],
670 if test "$libgo_has_struct_exception" = "yes"; then
671 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
672 [Define to 1 if <math.h> defines struct exception])
675 dnl See whether setcontext changes the value of TLS variables.
676 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
677 [libgo_cv_lib_setcontext_clobbers_tls],
678 [CFLAGS_hold="$CFLAGS"
679 CFLAGS="$PTHREAD_CFLAGS"
681 LIBS="$LIBS $PTHREAD_LIBS"
682 AC_CHECK_SIZEOF([void *])
683 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
688 #include <ucontext.h>
693 static char stack[[10 * 1024 * 1024]];
696 /* Called via makecontext/setcontext. */
704 /* Called via pthread_create. */
709 /* The thread should still see this value after calling
715 /* The call to setcontext should not return. */
724 /* The thread should not see this value. */
727 if (getcontext (&c) < 0)
730 c.uc_stack.ss_sp = stack;
731 #ifdef MAKECONTEXT_STACK_TOP
732 c.uc_stack.ss_sp += sizeof stack;
734 c.uc_stack.ss_flags = 0;
735 c.uc_stack.ss_size = sizeof stack;
737 makecontext (&c, cfn, 0);
739 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
742 if (pthread_join (tid, NULL) != 0)
745 /* The thread should have called exit. */
749 [libgo_cv_lib_setcontext_clobbers_tls=no],
750 [libgo_cv_lib_setcontext_clobbers_tls=yes],
751 [case "$target:$ptr_type_size" in
752 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
753 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
755 libgo_cv_lib_setcontext_clobbers_tls=no ;;
758 CFLAGS="$CFLAGS_hold"
761 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
762 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
763 [Define if setcontext clobbers TLS variables])
766 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
767 libgo_cv_ro_eh_frame, [
768 libgo_cv_ro_eh_frame=no
769 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
770 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
771 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
772 libgo_cv_ro_eh_frame=yes
773 elif grep '.section.*eh_frame.*#alloc' conftest.c \
774 | grep -v '#write' > /dev/null; then
775 libgo_cv_ro_eh_frame=yes
780 if test "x$libgo_cv_ro_eh_frame" = xyes; then
781 AC_DEFINE(EH_FRAME_FLAGS, "a",
782 [Define to the flags needed for the .section .eh_frame directive.])
784 AC_DEFINE(EH_FRAME_FLAGS, "aw",
785 [Define to the flags needed for the .section .eh_frame directive.])
788 AC_CACHE_CHECK([if compiler supports -Qunused-arguments],
789 [libgo_cv_c_unused_arguments],
791 CFLAGS="$CFLAGS -Qunused-arguments"
792 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
793 [libgo_cv_c_unused_arguments=yes],
794 [libgo_cv_c_unused_arguments=no])
795 CFLAGS=$CFLAGS_hold])
797 AC_CACHE_CHECK([if assembler supports GNU comdat group syntax],
798 libgo_cv_as_comdat_gnu, [
799 echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s
801 if test "$libgo_cv_c_unused_arguments" = yes; then
802 CFLAGS="$CFLAGS -Qunused-arguments"
804 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
805 libgo_cv_as_comdat_gnu=yes
807 libgo_cv_as_comdat_gnu=no
811 if test "x$libgo_cv_as_comdat_gnu" = xyes; then
812 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1,
813 [Define if your assembler supports GNU comdat group syntax.])
816 AC_CACHE_CHECK([assembler supports pc related relocs],
817 libgo_cv_as_x86_pcrel, [
818 libgo_cv_as_x86_pcrel=yes
819 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
821 if test "$libgo_cv_c_unused_arguments" = yes; then
822 CFLAGS="$CFLAGS -Qunused-arguments"
824 if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
825 libgo_cv_as_x86_pcrel=no
829 if test "x$libgo_cv_as_x86_pcrel" = xyes; then
830 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
831 [Define if your assembler supports PC relative relocs.])
834 AC_CACHE_CHECK([assembler supports unwind section type],
835 libgo_cv_as_x86_64_unwind_section_type, [
836 libgo_cv_as_x86_64_unwind_section_type=yes
837 echo '.section .eh_frame,"a",@unwind' > conftest.s
839 if test "$libgo_cv_c_unused_arguments" = yes; then
840 CFLAGS="$CFLAGS -Qunused-arguments"
842 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
843 libgo_cv_as_x86_64_unwind_section_type=no
847 if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then
848 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
849 [Define if your assembler supports unwind section type.])
852 AC_CACHE_CHECK([assembler supports AES instructions],
853 libgo_cv_as_x86_aes, [
854 libgo_cv_as_x86_aes=yes
855 echo 'aesenc %xmm0, %xmm1' > conftest.s
857 if test "$libgo_cv_c_unused_arguments" = yes; then
858 CFLAGS="$CFLAGS -Qunused-arguments"
860 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i error > /dev/null; then
861 libgo_cv_as_x86_aes=no
865 if test "x$libgo_cv_as_x86_aes" = xyes; then
866 AC_DEFINE(HAVE_AS_X86_AES, 1,
867 [Define if your assembler supports AES instructions.])
872 if test ${multilib} = yes; then
873 multilib_arg="--enable-multilib"
878 AC_CONFIG_FILES(Makefile testsuite/Makefile)
880 AC_CONFIG_COMMANDS([default],
881 [if test -n "$CONFIG_FILES"; then
882 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
883 # that multilib installs will end up installed in the correct place.
884 # The testsuite needs it for multilib-aware ABI baseline files.
885 # To work around this not being passed down from config-ml.in ->
886 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
887 # append it here. Only modify Makefiles that have just been created.
889 # Also, get rid of this simulated-VPATH thing that automake does.
891 s!`test -f '$<' || echo '$(srcdir)/'`!!
893 for i in $SUBDIRS; do
894 case $CONFIG_FILES in
896 #echo "Adding MULTISUBDIR to $i/Makefile"
897 sed -f vpsed $i/Makefile > tmp
898 grep '^MULTISUBDIR =' Makefile >> tmp
907 # Variables needed in config.status (file generation) which aren't already
908 # passed by autoconf.