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"
170 *-*-darwin*) is_darwin=yes; GOOS=darwin ;;
171 *-*-freebsd*) is_freebsd=yes; GOOS=freebsd ;;
172 *-*-irix6*) is_irix=yes; GOOS=irix ;;
173 *-*-linux*) is_linux=yes; GOOS=linux ;;
174 *-*-netbsd*) is_netbsd=yes; GOOS=netbsd ;;
175 *-*-openbsd*) is_openbsd=yes; GOOS=openbsd ;;
176 *-*-dragonfly*) is_dragonfly=yes; GOOS=dragonfly ;;
177 *-*-rtems*) is_rtems=yes; GOOS=rtems ;;
178 *-*-solaris2*) is_solaris=yes; GOOS=solaris ;;
179 *-*-aix*) is_aix=yes; GOOS=aix ;;
181 AM_CONDITIONAL(LIBGO_IS_DARWIN, test $is_darwin = yes)
182 AM_CONDITIONAL(LIBGO_IS_FREEBSD, test $is_freebsd = yes)
183 AM_CONDITIONAL(LIBGO_IS_IRIX, test $is_irix = yes)
184 AM_CONDITIONAL(LIBGO_IS_LINUX, test $is_linux = yes)
185 AM_CONDITIONAL(LIBGO_IS_NETBSD, test $is_netbsd = yes)
186 AM_CONDITIONAL(LIBGO_IS_OPENBSD, test $is_openbsd = yes)
187 AM_CONDITIONAL(LIBGO_IS_DRAGONFLY, test $is_dragonfly = yes)
188 AM_CONDITIONAL(LIBGO_IS_RTEMS, test $is_rtems = yes)
189 AM_CONDITIONAL(LIBGO_IS_SOLARIS, test $is_solaris = yes)
190 AM_CONDITIONAL(LIBGO_IS_AIX, test $is_aix = yes)
191 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)
195 dnl Test whether we need to use DejaGNU or whether we can use the
196 dnl simpler gotest approach. We can only use gotest for a native
200 *-*-rtems*) USE_DEJAGNU=yes ;;
202 *) USE_DEJAGNU=yes ;;
204 AC_SUBST(USE_DEJAGNU)
206 # All known GOARCH values. This is the union of all architectures
207 # supported by the gofrontend and all architectures supported by the
209 # To add a new architecture:
210 # - add it to this list
211 # - if appropriate, add an entry to ALLGOARCHFAMILY below
212 # - add an entry to the case on ${host} below to set GOARCH
213 # - update goarchList in libgo/go/go/build/syslist.go
214 # - update goarch.sh to report the values for this architecture
215 # - update go-set-goarch in gcc/testsuite/go.test/go-test.exp
216 # - update ptrSizeMap and intSizeMap in libgo/go/cmd/cgo/main.go
217 # - update arch lists in libgo/match.sh
218 # - update arch lists in libgo/testsuite/gotest
219 # - update +build lines in several places
220 # - libgo/go/runtime/lfstack_NNbit.go
221 # - libgo/go/runtime/hashNN.go
222 # - libgo/go/runtime/unalignedN.go
223 # - libgo/go/syscall/endian_XX.go
225 # - possibly update files in libgo/go/internal/syscall/unix
226 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"
228 # All known GOARCH family values.
229 ALLGOARCHFAMILY="I386 ALPHA AMD64 ARM ARM64 IA64 M68K MIPS MIPS64 NIOS2 PPC PPC64 RISCV RISCV64 S390 S390X SH SPARC SPARC64 WASM"
239 arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
248 i[34567]86-*-* | x86_64-*-*)
250 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
256 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
271 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
272 #if _MIPS_SIM != _ABIO32
277 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([
278 #if _MIPS_SIM != _ABIN32
283 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([
284 #if _MIPS_SIM != _ABI64
289 [AC_MSG_ERROR([unknown MIPS ABI])
290 [mips_abi="n32"]])])])
292 "o32") GOARCH=mips ;;
293 "n32") GOARCH=mips64p32 ;;
294 "n64") GOARCH=mips64 ;;
305 rs6000*-*-* | powerpc*-*-*)
306 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
313 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
314 #if defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN__)
325 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
326 #if defined(__s390x__)
333 sh3eb*-*-* | sh4eb*-*-*)
340 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
341 #if defined(__sparcv9) || defined(__arch64__)
351 AC_SUBST(ALLGOARCHFAMILY)
353 dnl Some files are only present when needed for specific architectures.
355 GO_LIBCALL_OS_ARCH_FILE=
357 GO_SYSCALL_OS_ARCH_FILE=
358 if test -f "${srcdir}/go/syscall/libcall_${GOOS}.go"; then
359 GO_LIBCALL_OS_FILE="go/syscall/libcall_${GOOS}.go"
361 if test -f "${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go"; then
362 GO_LIBCALL_OS_ARCH_FILE="go/syscall/libcall_${GOOS}_${GOARCH}.go"
364 if test -f "${srcdir}/go/syscall/syscall_${GOOS}.go"; then
365 GO_SYSCALL_OS_FILE="go/syscall/syscall_${GOOS}.go"
367 if test -f "${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go"; then
368 GO_SYSCALL_OS_ARCH_FILE="go/syscall/syscall_${GOOS}_${GOARCH}.go"
370 AC_SUBST(GO_LIBCALL_OS_FILE)
371 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
372 AC_SUBST(GO_SYSCALL_OS_FILE)
373 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
375 dnl Special flags used to generate sysinfo.go.
376 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
379 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
380 # msghdr in <sys/socket.h>.
381 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
383 *-*-solaris2.1[[01]])
384 # Solaris 10+ needs this so struct msghdr gets the msg_control
385 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
386 # above doesn't work with C99.
387 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
392 dnl Check if assembler supports disabling hardware capability support.
393 GCC_CHECK_ASSEMBLER_HWCAP
395 dnl Use -fsplit-stack when compiling C code if available.
396 AC_CACHE_CHECK([whether -fsplit-stack is supported],
397 [libgo_cv_c_split_stack_supported],
399 CFLAGS="$CFLAGS -fsplit-stack"
400 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
401 [libgo_cv_c_split_stack_supported=yes],
402 [libgo_cv_c_split_stack_supported=no])
403 CFLAGS=$CFLAGS_hold])
405 dnl Make sure the linker permits -fsplit-stack. Old versions of gold will
406 dnl reject split-stack code calling non-split-stack code on targets
407 dnl they don't support.
408 AC_CACHE_CHECK([whether linker supports split/non-split linked together],
409 [libgo_cv_c_linker_split_non_split],
410 [cat > conftest1.c << EOF
412 int main() { f(); return 0; }
414 cat > conftest2.c << EOF
417 $CC -c -fsplit-stack $CFLAGS $CPPFLAGS conftest1.c >/dev/null 2>&1
418 $CC -c $CFLAGS $CPPFLAGS conftest2.c > /dev/null 2>&1
419 if $CC -o conftest conftest1.$ac_objext conftest2.$ac_objext > /dev/null 2>&1; then
420 libgo_cv_c_linker_split_non_split=yes
422 libgo_cv_c_linker_split_non_split=no
424 rm -f conftest1.* conftest2.* conftest])
426 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes; then
427 SPLIT_STACK=-fsplit-stack
428 AC_DEFINE(USING_SPLIT_STACK, 1,
429 [Define if the compiler supports -fsplit-stack])
433 AC_SUBST(SPLIT_STACK)
434 AM_CONDITIONAL(USING_SPLIT_STACK,
435 test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes)
437 dnl If the compiler supports split-stack but the linker does not, then
438 dnl we need to explicitly disable split-stack for Go.
439 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = no; then
440 GO_SPLIT_STACK=-fno-split-stack
444 AC_SUBST(GO_SPLIT_STACK)
446 dnl Check whether the linker does stack munging when calling from
447 dnl split-stack into non-split-stack code. We check this by looking
448 dnl at the --help output. FIXME: This is only half right: it's
449 dnl possible for the linker to support this for some targets but not
451 dnl This is slightly different from the above check, which is whether
452 dnl the linker permits the call at all.
453 AC_CACHE_CHECK([whether linker supports split stack],
454 [libgo_cv_c_linker_supports_split_stack],
455 [libgo_cv_c_linker_supports_split_stack=no
456 if $GOC -Wl,--help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
457 libgo_cv_c_linker_supports_split_stack=yes
459 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
460 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
461 [Define if the linker support split stack adjustments])
464 AC_CACHE_CHECK([whether compiler is llgo],
465 [libgo_cv_c_goc_is_llgo],
466 [libgo_cv_c_goc_is_llgo=no
467 if $GOC -dumpversion 2>/dev/null | grep llgo >/dev/null 2>&1; then
468 libgo_cv_c_goc_is_llgo=yes
470 AM_CONDITIONAL(GOC_IS_LLGO, test "$libgo_cv_c_goc_is_llgo" = yes)
472 dnl Test for the -lm library.
474 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
477 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
478 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
479 [libgo_cv_lib_sockets=
481 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
482 if test "$libgo_check_socket" = "yes"; then
483 unset ac_cv_func_connect
484 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
485 libgo_check_both=yes)
487 if test "$libgo_check_both" = "yes"; then
489 LIBS="$LIBS -lsocket -lnsl"
490 unset ac_cv_func_accept
491 AC_CHECK_FUNC(accept,
493 libgo_cv_lib_sockets="-lsocket -lnsl"])
494 unset ac_cv_func_accept
497 unset ac_cv_func_gethostbyname
498 libgo_old_libs="$LIBS"
499 AC_CHECK_FUNC(gethostbyname, ,
500 [AC_CHECK_LIB(nsl, main,
501 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
502 unset ac_cv_func_gethostbyname
503 AC_CHECK_FUNC(sendfile, ,
504 [AC_CHECK_LIB(sendfile, main,
505 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lsendfile"])])
508 NET_LIBS="$libgo_cv_lib_sockets"
511 dnl Test whether the compiler supports the -pthread option.
512 AC_CACHE_CHECK([whether -pthread is supported],
513 [libgo_cv_lib_pthread],
515 CFLAGS="$CFLAGS -pthread -L../libatomic/.libs"
516 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
517 [libgo_cv_lib_pthread=yes],
518 [libgo_cv_lib_pthread=no])
519 CFLAGS=$CFLAGS_hold])
521 if test "$libgo_cv_lib_pthread" = yes; then
522 # RISC-V apparently adds -latomic when using -pthread.
523 PTHREAD_CFLAGS="-pthread -L../libatomic/.libs"
525 AC_SUBST(PTHREAD_CFLAGS)
527 dnl Test for the -lpthread library.
529 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
530 AC_SUBST(PTHREAD_LIBS)
532 dnl Test if -lrt is required for sched_yield or nanosleep or clock_gettime.
533 AC_SEARCH_LIBS([sched_yield], [rt])
534 AC_SEARCH_LIBS([nanosleep], [rt])
535 AC_SEARCH_LIBS([clock_gettime], [rt])
539 GCC_CHECK_UNWIND_GETIPINFO
541 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)
543 AC_CHECK_HEADERS([netinet/icmp6.h], [], [],
544 [#include <netinet/in.h>
547 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
548 [#ifdef HAVE_SYS_SOCKET_H
549 #include <sys/socket.h>
553 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
555 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv unsetenv dl_iterate_phdr memmem)
556 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
557 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
559 AC_CHECK_FUNCS(accept4 dup3 epoll_create1 faccessat fallocate fchmodat fchownat futimesat getxattr inotify_add_watch inotify_init inotify_init1 inotify_rm_watch listxattr mkdirat mknodat open64 openat pipe2 removexattr renameat setxattr sync_file_range splice syscall tee unlinkat unshare utimensat)
561 AC_CHECK_TYPES([loff_t])
565 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
568 CFLAGS_hold="$CFLAGS"
569 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
571 LIBS="$LIBS $PTHREAD_LIBS"
572 AC_CHECK_FUNCS(sem_timedwait)
573 CFLAGS="$CFLAGS_hold"
577 LIBS="$LIBS $MATH_LIBS"
578 AC_CHECK_FUNCS(matherr)
581 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4],
582 [libgo_cv_func___sync_bool_compare_and_swap_4],
583 [AC_LINK_IFELSE([AC_LANG_SOURCE([
584 typedef unsigned int uint32 __attribute__ ((mode (SI)));
586 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
588 [libgo_cv_func___sync_bool_compare_and_swap_4=yes],
589 [libgo_cv_func___sync_bool_compare_and_swap_4=no])])
590 if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then
591 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1,
592 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32])
595 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_8],
596 [libgo_cv_func___sync_bool_compare_and_swap_8],
597 [AC_LINK_IFELSE([AC_LANG_SOURCE([
598 typedef unsigned int uint64 __attribute__ ((mode (DI)));
600 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
602 [libgo_cv_func___sync_bool_compare_and_swap_8=yes],
603 [libgo_cv_func___sync_bool_compare_and_swap_8=no])])
604 if test "$libgo_cv_func___sync_bool_compare_and_swap_8" = "yes"; then
605 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_8, 1,
606 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint64])
609 AC_CACHE_CHECK([for __sync_fetch_and_add_4],
610 [libgo_cv_func___sync_fetch_and_add_4],
611 [AC_LINK_IFELSE([AC_LANG_SOURCE([
612 typedef unsigned int uint32 __attribute__ ((mode (SI)));
614 int main() { return __sync_fetch_and_add (&i, 1); }
616 [libgo_cv_func___sync_fetch_and_add_4=yes],
617 [libgo_cv_func___sync_fetch_and_add_4=no])])
618 if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then
619 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1,
620 [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32])
623 AC_CACHE_CHECK([for __sync_add_and_fetch_8],
624 [libgo_cv_func___sync_add_and_fetch_8],
625 [AC_LINK_IFELSE([AC_LANG_SOURCE([
626 typedef unsigned int uint64 __attribute__ ((mode (DI)));
628 int main() { return __sync_add_and_fetch (&i, 1); }
630 [libgo_cv_func___sync_add_and_fetch_8=yes],
631 [libgo_cv_func___sync_add_and_fetch_8=no])])
632 if test "$libgo_cv_func___sync_add_and_fetch_8" = "yes"; then
633 AC_DEFINE(HAVE_SYNC_ADD_AND_FETCH_8, 1,
634 [Define to 1 if the compiler provides the __sync_add_and_fetch function for uint64])
637 dnl For x86 we want to use the -minline-all-stringops option to avoid
638 dnl forcing a stack split when calling memcpy and friends.
639 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
640 [libgo_cv_c_stringops],
642 CFLAGS="$CFLAGS -minline-all-stringops"
643 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
644 [libgo_cv_c_stringops=yes],
645 [libgo_cv_c_stringops=no])
646 CFLAGS=$CFLAGS_hold])
648 if test "$libgo_cv_c_stringops" = yes; then
649 STRINGOPS_FLAG=-minline-all-stringops
651 AC_SUBST(STRINGOPS_FLAG)
653 dnl For x86 we want to compile the math library with -mfancy-math-387
654 dnl so that we can use the builtin instructions directly.
655 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
656 [libgo_cv_c_fancymath],
658 CFLAGS="$CFLAGS -mfancy-math-387"
659 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
660 [libgo_cv_c_fancymath=yes],
661 [libgo_cv_c_fancymath=no])
662 CFLAGS=$CFLAGS_hold])
664 if test "$libgo_cv_c_fancymath" = yes; then
665 MATH_FLAG="-mfancy-math-387"
667 MATH_FLAG="${MATH_FLAG} -ffp-contract=off -fno-math-errno -fno-trapping-math"
671 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
672 AC_CHECK_TYPES([off64_t])
675 dnl Work out the size of the epoll_events struct on GNU/Linux.
676 AC_CACHE_CHECK([epoll_event size],
677 [libgo_cv_c_epoll_event_size],
678 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
679 [sizeof (struct epoll_event)],
680 [#include <sys/epoll.h>],
681 [libgo_cv_c_epoll_event_size=0])])
682 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
683 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
685 dnl Work out the offset of the fd field in the epoll_events struct on
687 AC_CACHE_CHECK([epoll_event data.fd offset],
688 [libgo_cv_c_epoll_event_fd_offset],
689 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
690 [offsetof (struct epoll_event, data.fd)],
692 #include <sys/epoll.h>],
693 [libgo_cv_c_epoll_event_fd_offset=0])])
694 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
695 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
697 dnl Check if <sys/stat.h> uses timespec_t for st_?tim members. Introduced
698 dnl in Solaris 11.4 for XPG7 compatibility.
699 AC_EGREP_HEADER([timespec_t.*st_atim], [sys/stat.h],
700 [have_stat_timespec=yes], [have_stat_timespec=no])
701 AM_CONDITIONAL(HAVE_STAT_TIMESPEC, test $have_stat_timespec = yes)
703 dnl See if struct exception is defined in <math.h>.
704 AC_CHECK_TYPE([struct exception],
705 [libgo_has_struct_exception=yes],
706 [libgo_has_struct_exception=no],
708 if test "$libgo_has_struct_exception" = "yes"; then
709 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
710 [Define to 1 if <math.h> defines struct exception])
713 dnl See whether setcontext changes the value of TLS variables.
714 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
715 [libgo_cv_lib_setcontext_clobbers_tls],
716 [CFLAGS_hold="$CFLAGS"
717 CFLAGS="$PTHREAD_CFLAGS"
719 LIBS="$LIBS $PTHREAD_LIBS"
720 AC_CHECK_SIZEOF([void *])
721 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
726 #include <ucontext.h>
731 static char stack[[10 * 1024 * 1024]];
734 /* Called via makecontext/setcontext. */
742 /* Called via pthread_create. */
747 /* The thread should still see this value after calling
753 /* The call to setcontext should not return. */
762 /* The thread should not see this value. */
765 if (getcontext (&c) < 0)
768 c.uc_stack.ss_sp = stack;
769 #ifdef MAKECONTEXT_STACK_TOP
770 c.uc_stack.ss_sp += sizeof stack;
772 c.uc_stack.ss_flags = 0;
773 c.uc_stack.ss_size = sizeof stack;
775 makecontext (&c, cfn, 0);
777 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
780 if (pthread_join (tid, NULL) != 0)
783 /* The thread should have called exit. */
787 [libgo_cv_lib_setcontext_clobbers_tls=no],
788 [libgo_cv_lib_setcontext_clobbers_tls=yes],
789 [case "$target:$ptr_type_size" in
790 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
791 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
793 libgo_cv_lib_setcontext_clobbers_tls=no ;;
796 CFLAGS="$CFLAGS_hold"
799 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
800 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
801 [Define if setcontext clobbers TLS variables])
804 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
805 libgo_cv_ro_eh_frame, [
806 libgo_cv_ro_eh_frame=no
807 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
808 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
809 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
810 libgo_cv_ro_eh_frame=yes
811 elif grep '.section.*eh_frame.*#alloc' conftest.c \
812 | grep -v '#write' > /dev/null; then
813 libgo_cv_ro_eh_frame=yes
818 if test "x$libgo_cv_ro_eh_frame" = xyes; then
819 AC_DEFINE(EH_FRAME_FLAGS, "a",
820 [Define to the flags needed for the .section .eh_frame directive.])
822 AC_DEFINE(EH_FRAME_FLAGS, "aw",
823 [Define to the flags needed for the .section .eh_frame directive.])
826 AC_CACHE_CHECK([if compiler supports -Qunused-arguments],
827 [libgo_cv_c_unused_arguments],
829 CFLAGS="$CFLAGS -Qunused-arguments"
830 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
831 [libgo_cv_c_unused_arguments=yes],
832 [libgo_cv_c_unused_arguments=no])
833 CFLAGS=$CFLAGS_hold])
835 AC_CACHE_CHECK([if assembler supports GNU comdat group syntax],
836 libgo_cv_as_comdat_gnu, [
837 echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s
839 if test "$libgo_cv_c_unused_arguments" = yes; then
840 CFLAGS="$CFLAGS -Qunused-arguments"
842 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
843 libgo_cv_as_comdat_gnu=yes
845 libgo_cv_as_comdat_gnu=no
849 if test "x$libgo_cv_as_comdat_gnu" = xyes; then
850 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1,
851 [Define if your assembler supports GNU comdat group syntax.])
854 AC_CACHE_CHECK([assembler supports pc related relocs],
855 libgo_cv_as_x86_pcrel, [
856 libgo_cv_as_x86_pcrel=yes
857 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
859 if test "$libgo_cv_c_unused_arguments" = yes; then
860 CFLAGS="$CFLAGS -Qunused-arguments"
862 if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
863 libgo_cv_as_x86_pcrel=no
867 if test "x$libgo_cv_as_x86_pcrel" = xyes; then
868 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
869 [Define if your assembler supports PC relative relocs.])
872 AC_CACHE_CHECK([assembler supports unwind section type],
873 libgo_cv_as_x86_64_unwind_section_type, [
874 libgo_cv_as_x86_64_unwind_section_type=yes
875 echo '.section .eh_frame,"a",@unwind' > conftest.s
877 if test "$libgo_cv_c_unused_arguments" = yes; then
878 CFLAGS="$CFLAGS -Qunused-arguments"
880 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
881 libgo_cv_as_x86_64_unwind_section_type=no
885 if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then
886 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
887 [Define if your assembler supports unwind section type.])
890 AC_CACHE_CHECK([assembler supports AES instructions],
891 libgo_cv_as_x86_aes, [
892 libgo_cv_as_x86_aes=yes
893 echo 'aesenc %xmm0, %xmm1' > conftest.s
895 if test "$libgo_cv_c_unused_arguments" = yes; then
896 CFLAGS="$CFLAGS -Qunused-arguments"
898 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i error > /dev/null; then
899 libgo_cv_as_x86_aes=no
903 if test "x$libgo_cv_as_x86_aes" = xyes; then
904 AC_DEFINE(HAVE_AS_X86_AES, 1,
905 [Define if your assembler supports AES instructions.])
910 if test ${multilib} = yes; then
911 multilib_arg="--enable-multilib"
916 AC_CONFIG_FILES(Makefile testsuite/Makefile)
918 AC_CONFIG_COMMANDS([default],
919 [if test -n "$CONFIG_FILES"; then
920 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
921 # that multilib installs will end up installed in the correct place.
922 # The testsuite needs it for multilib-aware ABI baseline files.
923 # To work around this not being passed down from config-ml.in ->
924 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
925 # append it here. Only modify Makefiles that have just been created.
927 # Also, get rid of this simulated-VPATH thing that automake does.
929 s!`test -f '$<' || echo '$(srcdir)/'`!!
931 for i in $SUBDIRS; do
932 case $CONFIG_FILES in
934 #echo "Adding MULTISUBDIR to $i/Makefile"
935 sed -f vpsed $i/Makefile > tmp
936 grep '^MULTISUBDIR =' Makefile >> tmp
945 # Variables needed in config.status (file generation) which aren't already
946 # passed by autoconf.