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 GCC_WITH_TOOLEXECLIBDIR
85 # Version-specific runtime libs processing.
86 if test $version_specific_libs = yes; then
87 glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
88 glibgo_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
91 # Calculate glibgo_toolexecdir, glibgo_toolexeclibdir
92 # Install a library built with a cross compiler in tooldir, not libdir.
93 if test -n "$with_cross_host" &&
94 test x"$with_cross_host" != x"no"; then
95 nover_glibgo_toolexecdir='${exec_prefix}/${host_alias}'
96 case ${with_toolexeclibdir} in
98 nover_glibgo_toolexeclibdir='${toolexecdir}/lib'
101 nover_glibgo_toolexeclibdir=${with_toolexeclibdir}
105 nover_glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
106 nover_glibgo_toolexeclibdir='${libdir}'
108 multi_os_directory=`$GOC -print-multi-os-directory`
109 case $multi_os_directory in
110 .) ;; # Avoid trailing /.
111 *) nover_glibgo_toolexeclibdir=${nover_glibgo_toolexeclibdir}/${multi_os_directory} ;;
114 if test x"$glibgo_toolexecdir" = x"no"; then
115 glibgo_toolexecdir="${nover_glibgo_toolexecdir}"
116 glibgo_toolexeclibdir="${nover_glibgo_toolexeclibdir}"
119 AC_SUBST(glibgo_toolexecdir)
120 AC_SUBST(glibgo_toolexeclibdir)
121 AC_SUBST(nover_glibgo_toolexeclibdir)
123 # See if the user wants to configure without libffi. Some
124 # architectures don't support it. FIXME: We should set a default
127 AS_HELP_STRING([--without-libffi],
130 [with_libffi=${with_libffi_default-yes}])
134 if test "$with_libffi" != no; then
135 AC_DEFINE(USE_LIBFFI, 1, [Define if we're to use libffi.])
136 LIBFFI=../libffi/libffi_convenience.la
137 LIBFFIINCS='-I$(top_srcdir)/../libffi/include -I../libffi/include'
141 AM_CONDITIONAL(USE_LIBFFI, test "$with_libffi" != "no")
143 # See if the user wants to configure without libatomic. This is useful if we are
144 # on an architecture for which libgo does not need an atomic support library and
145 # libatomic does not support our C compiler.
146 AC_ARG_WITH(libatomic,
147 AS_HELP_STRING([--without-libatomic],
148 [don't use libatomic]),
150 [with_libatomic=${with_libatomic_default-yes}])
153 if test "$with_libatomic" != no; then
154 LIBATOMIC=../libatomic/libatomic_convenience.la
158 # Used to tell GNU make to include a file without telling automake to
160 go_include="-include"
163 # All known GOOS values. This is the union of all operating systems
164 # supported by the gofrontend and all operating systems supported by
166 ALLGOOS="aix android darwin dragonfly freebsd hurd illumos irix js linux netbsd openbsd plan9 rtems solaris windows"
181 *-*-darwin*) is_darwin=yes; GOOS=darwin ;;
182 *-*-freebsd*) is_freebsd=yes; GOOS=freebsd ;;
183 *-*-irix6*) is_irix=yes; GOOS=irix ;;
184 *-*-linux*) is_linux=yes; GOOS=linux ;;
185 *-*-netbsd*) is_netbsd=yes; GOOS=netbsd ;;
186 *-*-openbsd*) is_openbsd=yes; GOOS=openbsd ;;
187 *-*-dragonfly*) is_dragonfly=yes; GOOS=dragonfly ;;
188 *-*-rtems*) is_rtems=yes; GOOS=rtems ;;
189 *-*-solaris2*) is_solaris=yes; GOOS=solaris ;;
190 *-*-aix*) is_aix=yes; GOOS=aix ;;
191 *-*-gnu*) is_hurd=yes; GOOS=hurd ;;
193 AM_CONDITIONAL(LIBGO_IS_DARWIN, test $is_darwin = yes)
194 AM_CONDITIONAL(LIBGO_IS_FREEBSD, test $is_freebsd = yes)
195 AM_CONDITIONAL(LIBGO_IS_IRIX, test $is_irix = yes)
196 AM_CONDITIONAL(LIBGO_IS_LINUX, test $is_linux = yes)
197 AM_CONDITIONAL(LIBGO_IS_NETBSD, test $is_netbsd = yes)
198 AM_CONDITIONAL(LIBGO_IS_OPENBSD, test $is_openbsd = yes)
199 AM_CONDITIONAL(LIBGO_IS_DRAGONFLY, test $is_dragonfly = yes)
200 AM_CONDITIONAL(LIBGO_IS_RTEMS, test $is_rtems = yes)
201 AM_CONDITIONAL(LIBGO_IS_SOLARIS, test $is_solaris = yes)
202 AM_CONDITIONAL(LIBGO_IS_AIX, test $is_aix = yes)
203 AM_CONDITIONAL(LIBGO_IS_HURD, test $is_hurd = yes)
204 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)
208 dnl Test whether we need to use DejaGNU or whether we can use the
209 dnl simpler gotest approach. We can only use gotest for a native
213 *-*-rtems*) USE_DEJAGNU=yes ;;
215 *) USE_DEJAGNU=yes ;;
217 AC_SUBST(USE_DEJAGNU)
219 # All known GOARCH values. This is the union of all architectures
220 # supported by the gofrontend and all architectures supported by the
222 # To add a new architecture:
223 # - add it to this list
224 # - if appropriate, add an entry to ALLGOARCHFAMILY below
225 # - add an entry to the case on ${host} below to set GOARCH
226 # - update goarchList in libgo/go/go/build/syslist.go
227 # - update goarch.sh to report the values for this architecture
228 # - update go-set-goarch in gcc/testsuite/go.test/go-test.exp
229 # - update ptrSizeMap and intSizeMap in libgo/go/cmd/cgo/main.go
230 # - update arch lists in libgo/match.sh
231 # - update arch lists in libgo/testsuite/gotest
232 # - update +build lines in several places
233 # - libgo/go/runtime/lfstack_NNbit.go
234 # - libgo/go/runtime/hashNN.go
235 # - libgo/go/runtime/unalignedN.go
236 # - libgo/go/syscall/endian_XX.go
238 # - possibly update files in libgo/go/internal/syscall/unix
239 ALLGOARCH="386 alpha amd64 amd64p32 arm armbe arm64 arm64be ia64 m68k mips mipsle mips64 mips64le mips64p32 mips64p32le nios2 ppc ppc64 ppc64le riscv riscv64 s390 s390x sh shbe sparc sparc64 wasm"
241 # All known GOARCH family values.
242 ALLGOARCHFAMILY="I386 ALPHA AMD64 ARM ARM64 IA64 M68K MIPS MIPS64 NIOS2 PPC PPC64 RISCV RISCV64 S390 S390X SH SPARC SPARC64 WASM"
255 arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
264 i[34567]86-*-* | x86_64-*-*)
266 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
272 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
287 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
288 #if _MIPS_SIM != _ABIO32
293 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([
294 #if _MIPS_SIM != _ABIN32
299 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([
300 #if _MIPS_SIM != _ABI64
305 [AC_MSG_ERROR([unknown MIPS ABI])
306 [mips_abi="n32"]])])])
308 "o32") GOARCH=mips ;;
309 "n32") GOARCH=mips64p32 ;;
310 "n64") GOARCH=mips64 ;;
321 rs6000*-*-* | powerpc*-*-*)
322 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
329 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
330 #if defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN__)
341 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
342 #if defined(__s390x__)
349 sh3eb*-*-* | sh4eb*-*-*)
356 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
357 #if defined(__sparcv9) || defined(__arch64__)
367 AC_SUBST(ALLGOARCHFAMILY)
369 AM_CONDITIONAL(LIBGO_IS_X86, test "$GOARCH" = "386" -o "$GOARCH" = "amd64" -o "$GOARCH" = "amd64p32")
371 FUNCTION_DESCRIPTORS=false
373 rs6000*-*-* | powerpc*-*-*)
374 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
379 [FUNCTION_DESCRIPTORS=false],
380 [FUNCTION_DESCRIPTORS=true])
383 AC_SUBST(FUNCTION_DESCRIPTORS)
385 dnl Some files are only present when needed for specific architectures.
387 GO_LIBCALL_OS_ARCH_FILE=
389 GO_SYSCALL_OS_ARCH_FILE=
390 if test -f "${srcdir}/go/syscall/libcall_${GOOS}.go"; then
391 GO_LIBCALL_OS_FILE="go/syscall/libcall_${GOOS}.go"
393 if test -f "${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go"; then
394 GO_LIBCALL_OS_ARCH_FILE="go/syscall/libcall_${GOOS}_${GOARCH}.go"
396 if test -f "${srcdir}/go/syscall/syscall_${GOOS}.go"; then
397 GO_SYSCALL_OS_FILE="go/syscall/syscall_${GOOS}.go"
399 if test -f "${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go"; then
400 GO_SYSCALL_OS_ARCH_FILE="go/syscall/syscall_${GOOS}_${GOARCH}.go"
402 AC_SUBST(GO_LIBCALL_OS_FILE)
403 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
404 AC_SUBST(GO_SYSCALL_OS_FILE)
405 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
407 dnl Special flags used to generate sysinfo.go.
408 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
411 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
412 # msghdr in <sys/socket.h>.
413 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
416 # Solaris 10+ needs this so struct msghdr gets the msg_control
417 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
418 # above doesn't work with C99.
419 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
424 dnl Check if assembler supports disabling hardware capability support.
425 GCC_CHECK_ASSEMBLER_HWCAP
427 dnl Use -fsplit-stack when compiling C code if available.
428 AC_CACHE_CHECK([whether -fsplit-stack is supported],
429 [libgo_cv_c_split_stack_supported],
431 CFLAGS="$CFLAGS -fsplit-stack"
432 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
433 [libgo_cv_c_split_stack_supported=yes],
434 [libgo_cv_c_split_stack_supported=no])
435 CFLAGS=$CFLAGS_hold])
437 dnl Make sure the linker permits -fsplit-stack. Old versions of gold will
438 dnl reject split-stack code calling non-split-stack code on targets
439 dnl they don't support.
440 AC_CACHE_CHECK([whether linker supports split/non-split linked together],
441 [libgo_cv_c_linker_split_non_split],
442 [cat > conftest1.c << EOF
444 int main() { f(); return 0; }
446 cat > conftest2.c << EOF
449 $CC -c -fsplit-stack $CFLAGS $CPPFLAGS conftest1.c >/dev/null 2>&1
450 $CC -c $CFLAGS $CPPFLAGS conftest2.c > /dev/null 2>&1
451 if $CC -o conftest conftest1.$ac_objext conftest2.$ac_objext > /dev/null 2>&1; then
452 libgo_cv_c_linker_split_non_split=yes
454 libgo_cv_c_linker_split_non_split=no
456 rm -f conftest1.* conftest2.* conftest])
458 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes; then
459 SPLIT_STACK=-fsplit-stack
460 AC_DEFINE(USING_SPLIT_STACK, 1,
461 [Define if the compiler supports -fsplit-stack])
465 AC_SUBST(SPLIT_STACK)
466 AM_CONDITIONAL(USING_SPLIT_STACK,
467 test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes)
469 dnl If the compiler supports split-stack but the linker does not, then
470 dnl we need to explicitly disable split-stack for Go.
471 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = no; then
472 GO_SPLIT_STACK=-fno-split-stack
476 AC_SUBST(GO_SPLIT_STACK)
478 dnl Check whether the linker does stack munging when calling from
479 dnl split-stack into non-split-stack code. We check this by looking
480 dnl at the --help output. FIXME: This is only half right: it's
481 dnl possible for the linker to support this for some targets but not
483 dnl This is slightly different from the above check, which is whether
484 dnl the linker permits the call at all.
485 AC_CACHE_CHECK([whether linker supports split stack],
486 [libgo_cv_c_linker_supports_split_stack],
487 [libgo_cv_c_linker_supports_split_stack=no
488 if $GOC -Wl,--help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
489 libgo_cv_c_linker_supports_split_stack=yes
491 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
492 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
493 [Define if the linker support split stack adjustments])
496 AC_CACHE_CHECK([whether compiler is llgo],
497 [libgo_cv_c_goc_is_llgo],
498 [libgo_cv_c_goc_is_llgo=no
499 if $GOC -dumpversion 2>/dev/null | grep llgo >/dev/null 2>&1; then
500 libgo_cv_c_goc_is_llgo=yes
502 AM_CONDITIONAL(GOC_IS_LLGO, test "$libgo_cv_c_goc_is_llgo" = yes)
504 dnl Test for the -lm library.
506 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
509 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
510 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
511 [libgo_cv_lib_sockets=
513 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
514 if test "$libgo_check_socket" = "yes"; then
515 unset ac_cv_func_connect
516 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
517 libgo_check_both=yes)
519 if test "$libgo_check_both" = "yes"; then
521 LIBS="$LIBS -lsocket -lnsl"
522 unset ac_cv_func_accept
523 AC_CHECK_FUNC(accept,
525 libgo_cv_lib_sockets="-lsocket -lnsl"])
526 unset ac_cv_func_accept
529 unset ac_cv_func_gethostbyname
530 libgo_old_libs="$LIBS"
531 AC_CHECK_FUNC(gethostbyname, ,
532 [AC_CHECK_LIB(nsl, main,
533 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
534 unset ac_cv_func_gethostbyname
535 AC_CHECK_FUNC(sendfile, ,
536 [AC_CHECK_LIB(sendfile, main,
537 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lsendfile"])])
540 NET_LIBS="$libgo_cv_lib_sockets"
543 dnl Test whether the compiler supports the -pthread option.
544 AC_CACHE_CHECK([whether -pthread is supported],
545 [libgo_cv_lib_pthread],
547 CFLAGS="$CFLAGS -pthread -L../libatomic/.libs"
548 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
549 [libgo_cv_lib_pthread=yes],
550 [libgo_cv_lib_pthread=no])
551 CFLAGS=$CFLAGS_hold])
553 if test "$libgo_cv_lib_pthread" = yes; then
554 # RISC-V apparently adds -latomic when using -pthread.
555 PTHREAD_CFLAGS="-pthread -L../libatomic/.libs"
557 AC_SUBST(PTHREAD_CFLAGS)
559 dnl Test for the -lpthread library.
561 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
562 AC_SUBST(PTHREAD_LIBS)
564 dnl Test if -lrt is required for sched_yield or nanosleep or clock_gettime.
565 AC_SEARCH_LIBS([sched_yield], [rt])
566 AC_SEARCH_LIBS([nanosleep], [rt])
567 AC_SEARCH_LIBS([clock_gettime], [rt])
571 GCC_CHECK_UNWIND_GETIPINFO
573 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)
575 AC_CHECK_HEADERS([netinet/icmp6.h], [], [],
576 [#include <netinet/in.h>
579 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
580 [#ifdef HAVE_SYS_SOCKET_H
581 #include <sys/socket.h>
585 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
587 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv unsetenv dl_iterate_phdr memmem)
588 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
589 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
591 AC_CHECK_FUNCS(accept4 dup3 epoll_create1 faccessat fallocate fchmodat fchownat futimesat getxattr inotify_add_watch inotify_init inotify_init1 inotify_rm_watch listxattr mkdirat mknodat open64 openat pipe2 removexattr renameat setxattr sync_file_range splice syscall tee unlinkat unshare utimensat)
593 AC_CHECK_TYPES([loff_t])
597 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
600 CFLAGS_hold="$CFLAGS"
601 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
603 LIBS="$LIBS $PTHREAD_LIBS"
604 AC_CHECK_FUNCS(sem_timedwait)
605 CFLAGS="$CFLAGS_hold"
609 LIBS="$LIBS $MATH_LIBS"
610 AC_CHECK_FUNCS(matherr)
613 dnl For x86 we want to use the -minline-all-stringops option to avoid
614 dnl forcing a stack split when calling memcpy and friends.
615 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
616 [libgo_cv_c_stringops],
618 CFLAGS="$CFLAGS -minline-all-stringops"
619 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
620 [libgo_cv_c_stringops=yes],
621 [libgo_cv_c_stringops=no])
622 CFLAGS=$CFLAGS_hold])
624 if test "$libgo_cv_c_stringops" = yes; then
625 STRINGOPS_FLAG=-minline-all-stringops
627 AC_SUBST(STRINGOPS_FLAG)
629 dnl For x86 we want to compile the math library with -mfancy-math-387
630 dnl so that we can use the builtin instructions directly.
631 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
632 [libgo_cv_c_fancymath],
634 CFLAGS="$CFLAGS -mfancy-math-387"
635 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
636 [libgo_cv_c_fancymath=yes],
637 [libgo_cv_c_fancymath=no])
638 CFLAGS=$CFLAGS_hold])
640 if test "$libgo_cv_c_fancymath" = yes; then
641 MATH_FLAG="-mfancy-math-387"
643 MATH_FLAG="${MATH_FLAG} -ffp-contract=off -fno-math-errno -fno-trapping-math"
647 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
648 AC_CHECK_TYPES([off64_t])
651 dnl Work out the size of the epoll_events struct on GNU/Linux.
652 AC_CACHE_CHECK([epoll_event size],
653 [libgo_cv_c_epoll_event_size],
654 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
655 [sizeof (struct epoll_event)],
656 [#include <sys/epoll.h>],
657 [libgo_cv_c_epoll_event_size=0])])
658 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
659 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
661 dnl Work out the offset of the fd field in the epoll_events struct on
663 AC_CACHE_CHECK([epoll_event data.fd offset],
664 [libgo_cv_c_epoll_event_fd_offset],
665 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
666 [offsetof (struct epoll_event, data.fd)],
668 #include <sys/epoll.h>],
669 [libgo_cv_c_epoll_event_fd_offset=0])])
670 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
671 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
673 dnl Check if <sys/stat.h> uses timespec_t for st_?tim members. Introduced
674 dnl in Solaris 11.4 for XPG7 compatibility.
675 AC_EGREP_HEADER([timespec_t.*st_atim], [sys/stat.h],
676 [have_stat_timespec=yes], [have_stat_timespec=no])
677 AM_CONDITIONAL(HAVE_STAT_TIMESPEC, test $have_stat_timespec = yes)
679 dnl See if struct exception is defined in <math.h>.
680 AC_CHECK_TYPE([struct exception],
681 [libgo_has_struct_exception=yes],
682 [libgo_has_struct_exception=no],
684 if test "$libgo_has_struct_exception" = "yes"; then
685 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
686 [Define to 1 if <math.h> defines struct exception])
689 dnl See whether setcontext changes the value of TLS variables.
690 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
691 [libgo_cv_lib_setcontext_clobbers_tls],
692 [CFLAGS_hold="$CFLAGS"
693 CFLAGS="$PTHREAD_CFLAGS"
695 LIBS="$LIBS $PTHREAD_LIBS"
696 AC_CHECK_SIZEOF([void *])
697 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
702 #include <ucontext.h>
707 static char stack[[10 * 1024 * 1024]];
710 /* Called via makecontext/setcontext. */
718 /* Called via pthread_create. */
723 /* The thread should still see this value after calling
729 /* The call to setcontext should not return. */
738 /* The thread should not see this value. */
741 if (getcontext (&c) < 0)
744 c.uc_stack.ss_sp = stack;
745 #ifdef MAKECONTEXT_STACK_TOP
746 c.uc_stack.ss_sp += sizeof stack;
748 c.uc_stack.ss_flags = 0;
749 c.uc_stack.ss_size = sizeof stack;
751 makecontext (&c, cfn, 0);
753 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
756 if (pthread_join (tid, NULL) != 0)
759 /* The thread should have called exit. */
763 [libgo_cv_lib_setcontext_clobbers_tls=no],
764 [libgo_cv_lib_setcontext_clobbers_tls=yes],
765 [case "$target:$ptr_type_size" in
766 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
767 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
769 libgo_cv_lib_setcontext_clobbers_tls=no ;;
772 CFLAGS="$CFLAGS_hold"
775 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
776 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
777 [Define if setcontext clobbers TLS variables])
780 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
781 libgo_cv_ro_eh_frame, [
782 libgo_cv_ro_eh_frame=no
783 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
784 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
785 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
786 libgo_cv_ro_eh_frame=yes
787 elif grep '.section.*eh_frame.*#alloc' conftest.c \
788 | grep -v '#write' > /dev/null; then
789 libgo_cv_ro_eh_frame=yes
794 if test "x$libgo_cv_ro_eh_frame" = xyes; then
795 AC_DEFINE(EH_FRAME_FLAGS, "a",
796 [Define to the flags needed for the .section .eh_frame directive.])
798 AC_DEFINE(EH_FRAME_FLAGS, "aw",
799 [Define to the flags needed for the .section .eh_frame directive.])
802 AC_CACHE_CHECK([if compiler supports -Qunused-arguments],
803 [libgo_cv_c_unused_arguments],
805 CFLAGS="$CFLAGS -Qunused-arguments"
806 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
807 [libgo_cv_c_unused_arguments=yes],
808 [libgo_cv_c_unused_arguments=no])
809 CFLAGS=$CFLAGS_hold])
811 AC_CACHE_CHECK([if assembler supports GNU comdat group syntax],
812 libgo_cv_as_comdat_gnu, [
813 echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s
815 if test "$libgo_cv_c_unused_arguments" = yes; then
816 CFLAGS="$CFLAGS -Qunused-arguments"
818 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
819 libgo_cv_as_comdat_gnu=yes
821 libgo_cv_as_comdat_gnu=no
825 if test "x$libgo_cv_as_comdat_gnu" = xyes; then
826 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1,
827 [Define if your assembler supports GNU comdat group syntax.])
830 AC_CACHE_CHECK([assembler supports pc related relocs],
831 libgo_cv_as_x86_pcrel, [
832 libgo_cv_as_x86_pcrel=yes
833 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
835 if test "$libgo_cv_c_unused_arguments" = yes; then
836 CFLAGS="$CFLAGS -Qunused-arguments"
838 if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
839 libgo_cv_as_x86_pcrel=no
843 if test "x$libgo_cv_as_x86_pcrel" = xyes; then
844 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
845 [Define if your assembler supports PC relative relocs.])
848 AC_CACHE_CHECK([assembler supports unwind section type],
849 libgo_cv_as_x86_64_unwind_section_type, [
850 libgo_cv_as_x86_64_unwind_section_type=yes
851 echo '.section .eh_frame,"a",@unwind' > conftest.s
853 if test "$libgo_cv_c_unused_arguments" = yes; then
854 CFLAGS="$CFLAGS -Qunused-arguments"
856 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
857 libgo_cv_as_x86_64_unwind_section_type=no
861 if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then
862 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
863 [Define if your assembler supports unwind section type.])
866 AC_CACHE_CHECK([assembler supports AES instructions],
867 libgo_cv_as_x86_aes, [
868 libgo_cv_as_x86_aes=yes
869 echo 'aesenc %xmm0, %xmm1' > conftest.s
871 if test "$libgo_cv_c_unused_arguments" = yes; then
872 CFLAGS="$CFLAGS -Qunused-arguments"
874 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i error > /dev/null; then
875 libgo_cv_as_x86_aes=no
879 if test "x$libgo_cv_as_x86_aes" = xyes; then
880 AC_DEFINE(HAVE_AS_X86_AES, 1,
881 [Define if your assembler supports AES instructions.])
886 if test ${multilib} = yes; then
887 multilib_arg="--enable-multilib"
892 AC_CONFIG_FILES(Makefile testsuite/Makefile testsuite/libgo-test-support.exp)
894 AC_CONFIG_COMMANDS([default],
895 [if test -n "$CONFIG_FILES"; then
896 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
897 # that multilib installs will end up installed in the correct place.
898 # The testsuite needs it for multilib-aware ABI baseline files.
899 # To work around this not being passed down from config-ml.in ->
900 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
901 # append it here. Only modify Makefiles that have just been created.
903 # Also, get rid of this simulated-VPATH thing that automake does.
905 s!`test -f '$<' || echo '$(srcdir)/'`!!
907 for i in $SUBDIRS; do
908 case $CONFIG_FILES in
910 #echo "Adding MULTISUBDIR to $i/Makefile"
911 sed -f vpsed $i/Makefile > tmp
912 grep '^MULTISUBDIR =' Makefile >> tmp
921 # Variables needed in config.status (file generation) which aren't already
922 # passed by autoconf.