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.
10 AC_INIT(package-unused, version-unused,, libgo)
11 AC_CONFIG_SRCDIR(Makefile.am)
12 AC_CONFIG_HEADER(config.h)
14 libtool_VERSION=10:0:0
15 AC_SUBST(libtool_VERSION)
17 AM_ENABLE_MULTILIB(, ..)
20 target_alias=${target_alias-$host_alias}
22 AM_INIT_AUTOMAKE([1.9.3 no-define foreign no-dist -Wall -Wno-portability])
23 AH_TEMPLATE(PACKAGE, [Name of package])
24 AH_TEMPLATE(VERSION, [Version number of package])
26 m4_rename([_AC_ARG_VAR_PRECIOUS],[glibgo_PRECIOUS])
27 m4_define([_AC_ARG_VAR_PRECIOUS],[])
30 m4_rename_force([glibgo_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
38 AC_CHECK_TOOL(OBJCOPY, objcopy, missing-objcopy)
42 AC_SUBST(enable_shared)
43 AC_SUBST(enable_static)
45 CC_FOR_BUILD=${CC_FOR_BUILD:-gcc}
46 AC_SUBST(CC_FOR_BUILD)
50 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
53 AC_ARG_ENABLE(werror, [AS_HELP_STRING([--enable-werror],
54 [turns on -Werror @<:@default=yes@:>@])])
55 if test "x$enable_werror" != "xno"; then
61 glibgo_toolexeclibdir=no
63 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
64 AC_ARG_ENABLE([version-specific-runtime-libs],
65 AC_HELP_STRING([--enable-version-specific-runtime-libs],
66 [Specify that runtime libraries should be installed in a compiler-specific directory]),
68 yes) version_specific_libs=yes ;;
69 no) version_specific_libs=no ;;
70 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
72 [version_specific_libs=no])
73 AC_MSG_RESULT($version_specific_libs)
75 # Version-specific runtime libs processing.
76 if test $version_specific_libs = yes; then
77 glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
78 glibgo_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
81 # Calculate glibgo_toolexecdir, glibgo_toolexeclibdir
82 # Install a library built with a cross compiler in tooldir, not libdir.
83 if test -n "$with_cross_host" &&
84 test x"$with_cross_host" != x"no"; then
85 nover_glibgo_toolexecdir='${exec_prefix}/${host_alias}'
86 nover_glibgo_toolexeclibdir='${toolexecdir}/lib'
88 nover_glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
89 nover_glibgo_toolexeclibdir='${libdir}'
91 multi_os_directory=`$GOC -print-multi-os-directory`
92 case $multi_os_directory in
93 .) ;; # Avoid trailing /.
94 *) nover_glibgo_toolexeclibdir=${nover_glibgo_toolexeclibdir}/${multi_os_directory} ;;
97 if test x"$glibgo_toolexecdir" = x"no"; then
98 glibgo_toolexecdir="${nover_glibgo_toolexecdir}"
99 glibgo_toolexeclibdir="${nover_glibgo_toolexeclibdir}"
102 AC_SUBST(glibgo_toolexecdir)
103 AC_SUBST(glibgo_toolexeclibdir)
104 AC_SUBST(nover_glibgo_toolexeclibdir)
106 # See if the user wants to configure without libffi. Some
107 # architectures don't support it. FIXME: We should set a default
110 AS_HELP_STRING([--without-libffi],
113 [with_libffi=${with_libffi_default-yes}])
117 if test "$with_libffi" != no; then
118 AC_DEFINE(USE_LIBFFI, 1, [Define if we're to use libffi.])
119 LIBFFI=../libffi/libffi_convenience.la
120 LIBFFIINCS='-I$(top_srcdir)/../libffi/include -I../libffi/include'
124 AM_CONDITIONAL(USE_LIBFFI, test "$with_liffi" != "no")
126 # See if the user wants to configure without libatomic. This is useful if we are
127 # on an architecture for which libgo does not need an atomic support library and
128 # libatomic does not support our C compiler.
129 AC_ARG_WITH(libatomic,
130 AS_HELP_STRING([--without-libatomic],
131 [don't use libatomic]),
133 [with_libatomic=${with_libatomic_default-yes}])
136 if test "$with_libatomic" != no; then
137 LIBATOMIC=../libatomic/libatomic_convenience.la
141 # Used to tell GNU make to include a file without telling automake to
143 go_include="-include"
146 # All known GOOS values. This is the union of all operating systems
147 # supported by the gofrontend and all operating systems supported by
149 ALLGOOS="android darwin dragonfly freebsd irix linux netbsd openbsd plan9 rtems solaris windows"
162 *-*-darwin*) is_darwin=yes; GOOS=darwin ;;
163 *-*-freebsd*) is_freebsd=yes; GOOS=freebsd ;;
164 *-*-irix6*) is_irix=yes; GOOS=irix ;;
165 *-*-linux*) is_linux=yes; GOOS=linux ;;
166 *-*-netbsd*) is_netbsd=yes; GOOS=netbsd ;;
167 *-*-openbsd*) is_openbsd=yes; GOOS=openbsd ;;
168 *-*-dragonfly*) is_dragonfly=yes; GOOS=dragonfly ;;
169 *-*-rtems*) is_rtems=yes; GOOS=rtems ;;
170 *-*-solaris2*) is_solaris=yes; GOOS=solaris ;;
172 AM_CONDITIONAL(LIBGO_IS_DARWIN, test $is_darwin = yes)
173 AM_CONDITIONAL(LIBGO_IS_FREEBSD, test $is_freebsd = yes)
174 AM_CONDITIONAL(LIBGO_IS_IRIX, test $is_irix = yes)
175 AM_CONDITIONAL(LIBGO_IS_LINUX, test $is_linux = yes)
176 AM_CONDITIONAL(LIBGO_IS_NETBSD, test $is_netbsd = yes)
177 AM_CONDITIONAL(LIBGO_IS_OPENBSD, test $is_openbsd = yes)
178 AM_CONDITIONAL(LIBGO_IS_DRAGONFLY, test $is_dragonfly = yes)
179 AM_CONDITIONAL(LIBGO_IS_RTEMS, test $is_rtems = yes)
180 AM_CONDITIONAL(LIBGO_IS_SOLARIS, test $is_solaris = yes)
181 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)
185 dnl Test whether we need to use DejaGNU or whether we can use the
186 dnl simpler gotest approach. We can only use gotest for a native
190 *-*-rtems*) USE_DEJAGNU=yes ;;
192 *) USE_DEJAGNU=yes ;;
194 AC_SUBST(USE_DEJAGNU)
196 # All known GOARCH values. This is the union of all architectures
197 # supported by the gofrontend and all architectures supported by the
199 # N.B. Keep in sync with gcc/testsuite/go.test/go-test.exp (go-set-goarch).
200 ALLGOARCH="386 alpha amd64 amd64p32 arm armbe arm64 arm64be ia64 m68k mipso32 mipsn32 mipso64 mipsn64 mips mipsle mips64 mips64le mips64p32 mips64p32le ppc ppc64 ppc64le s390 s390x sparc sparc64"
202 # All known GOARCH_FAMILY values.
203 ALLGOARCHFAMILY="I386 ALPHA AMD64 ARM ARM64 IA64 M68K MIPS MIPS64 PPC PPC64 S390 S390X SPARC SPARC64"
206 GOARCH_FAMILY=unknown
208 GOARCH_CACHELINESIZE=64
209 GOARCH_PHYSPAGESIZE=4096
212 GOARCH_HUGEPAGESIZE=0
213 GOARCH_MINFRAMESIZE=0
218 GOARCH_PHYSPAGESIZE=8192
224 GOARCH_CACHELINESIZE=32
225 GOARCH_PHYSPAGESIZE=65536
227 GOARCH_MINFRAMESIZE=8
229 arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
232 GOARCH_CACHELINESIZE=32
234 GOARCH_MINFRAMESIZE=4
237 i[34567]86-*-* | x86_64-*-*)
246 GOARCH_HUGEPAGESIZE="1 << 21"
250 GOARCH_HUGEPAGESIZE="1 << 21"
256 GOARCH_CACHELINESIZE=16384
257 GOARCH_PHYSPAGESIZE=65536
263 GOARCH_CACHELINESIZE=16
269 #if _MIPS_SIM != _ABIO32
274 #if _MIPS_SIM != _ABIN32
279 #if _MIPS_SIM != _ABI64
284 #if _MIPS_SIM != _ABIO64
288 [AC_MSG_ERROR([unknown MIPS ABI])
289 [mips_abi="n32"]])])])])
291 "o32") GOARCH=mipso32 ;;
292 "n32") GOARCH=mipsn32 ;;
293 "n64") GOARCH=mipsn64 ;;
294 "o64") GOARCH=mipso64 ;;
299 GOARCH_MINFRAMESIZE=4
303 GOARCH_MINFRAMESIZE=8
313 GOARCH_CACHELINESIZE=32
314 GOARCH_PHYSPAGESIZE=16384
317 rs6000*-*-* | powerpc*-*-*)
329 #if defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN__)
337 GOARCH_PHYSPAGESIZE=65536
339 GOARCH_MINFRAMESIZE=32
343 #if defined(__s390x__)
348 GOARCH_MINFRAMESIZE=4
351 GOARCH_MINFRAMESIZE=8
354 GOARCH_CACHELINESIZE=256
359 #if defined(__sparcv9) || defined(__arch64__)
366 GOARCH_FAMILY=SPARC64
369 GOARCH_PHYSPAGESIZE=8192
374 AC_SUBST(GOARCH_FAMILY)
375 AC_SUBST(GOARCH_BIGENDIAN)
376 AC_SUBST(GOARCH_CACHELINESIZE)
377 AC_SUBST(GOARCH_PHYSPAGESIZE)
378 AC_SUBST(GOARCH_PCQUANTUM)
379 AC_SUBST(GOARCH_INT64ALIGN)
380 AC_SUBST(GOARCH_HUGEPAGESIZE)
381 AC_SUBST(GOARCH_MINFRAMESIZE)
383 AC_SUBST(ALLGOARCHFAMILY)
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"
415 *-*-solaris2.1[[01]])
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([[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"
548 AC_COMPILE_IFELSE([[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 PTHREAD_CFLAGS=-pthread
556 AC_SUBST(PTHREAD_CFLAGS)
558 dnl Test for the -lpthread library.
560 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
561 AC_SUBST(PTHREAD_LIBS)
563 dnl Test if -lrt is required for sched_yield or nanosleep or clock_gettime.
564 AC_SEARCH_LIBS([sched_yield], [rt])
565 AC_SEARCH_LIBS([nanosleep], [rt])
566 AC_SEARCH_LIBS([clock_gettime], [rt])
570 GCC_CHECK_UNWIND_GETIPINFO
572 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/reboot.h netinet/icmp6.h netinet/in_syst.h netinet/ip.h netinet/ip_mroute.h netinet/if_ether.h)
574 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
575 [#ifdef HAVE_SYS_SOCKET_H
576 #include <sys/socket.h>
580 AC_CACHE_CHECK([whether <ustat.h> can be used],
581 [libgo_cv_c_ustat_h],
583 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE $OSCFLAGS"
586 #include <sys/types.h>
587 #ifdef HAVE_LINUX_FILTER_H
588 #include <linux/filter.h>
591 ])], [libgo_cv_c_ustat_h=yes], [libgo_cv_c_ustat_h=no])
592 CFLAGS=$CFLAGS_hold])
593 if test $libgo_cv_c_ustat_h = yes; then
594 AC_DEFINE(HAVE_USTAT_H, 1,
595 [Define to 1 if you have the <ustat.h> header file and it works.])
598 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
600 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv unsetenv dl_iterate_phdr)
601 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
602 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
604 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 tee unlinkat unshare utimensat)
606 AC_CHECK_TYPES([loff_t])
610 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
613 CFLAGS_hold="$CFLAGS"
614 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
616 LIBS="$LIBS $PTHREAD_LIBS"
617 AC_CHECK_FUNCS(sem_timedwait)
618 CFLAGS="$CFLAGS_hold"
622 LIBS="$LIBS $MATH_LIBS"
623 AC_CHECK_FUNCS(matherr)
626 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4],
627 [libgo_cv_func___sync_bool_compare_and_swap_4],
629 typedef unsigned int uint32 __attribute__ ((mode (SI)));
631 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
633 [libgo_cv_func___sync_bool_compare_and_swap_4=yes],
634 [libgo_cv_func___sync_bool_compare_and_swap_4=no])])
635 if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then
636 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1,
637 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32])
640 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_8],
641 [libgo_cv_func___sync_bool_compare_and_swap_8],
643 typedef unsigned int uint64 __attribute__ ((mode (DI)));
645 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
647 [libgo_cv_func___sync_bool_compare_and_swap_8=yes],
648 [libgo_cv_func___sync_bool_compare_and_swap_8=no])])
649 if test "$libgo_cv_func___sync_bool_compare_and_swap_8" = "yes"; then
650 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_8, 1,
651 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint64])
654 AC_CACHE_CHECK([for __sync_fetch_and_add_4],
655 [libgo_cv_func___sync_fetch_and_add_4],
657 typedef unsigned int uint32 __attribute__ ((mode (SI)));
659 int main() { return __sync_fetch_and_add (&i, 1); }
661 [libgo_cv_func___sync_fetch_and_add_4=yes],
662 [libgo_cv_func___sync_fetch_and_add_4=no])])
663 if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then
664 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1,
665 [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32])
668 AC_CACHE_CHECK([for __sync_add_and_fetch_8],
669 [libgo_cv_func___sync_add_and_fetch_8],
671 typedef unsigned int uint64 __attribute__ ((mode (DI)));
673 int main() { return __sync_add_and_fetch (&i, 1); }
675 [libgo_cv_func___sync_add_and_fetch_8=yes],
676 [libgo_cv_func___sync_add_and_fetch_8=no])])
677 if test "$libgo_cv_func___sync_add_and_fetch_8" = "yes"; then
678 AC_DEFINE(HAVE_SYNC_ADD_AND_FETCH_8, 1,
679 [Define to 1 if the compiler provides the __sync_add_and_fetch function for uint64])
682 dnl For x86 we want to use the -minline-all-stringops option to avoid
683 dnl forcing a stack split when calling memcpy and friends.
684 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
685 [libgo_cv_c_stringops],
687 CFLAGS="$CFLAGS -minline-all-stringops"
688 AC_COMPILE_IFELSE([int i;],
689 [libgo_cv_c_stringops=yes],
690 [libgo_cv_c_stringops=no])
691 CFLAGS=$CFLAGS_hold])
693 if test "$libgo_cv_c_stringops" = yes; then
694 STRINGOPS_FLAG=-minline-all-stringops
696 AC_SUBST(STRINGOPS_FLAG)
698 dnl For x86 we want to compile the math library with -mfancy-math-387
699 dnl -funsafe-math-optimizations so that we can use the builtin
700 dnl instructions directly.
701 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
702 [libgo_cv_c_fancymath],
704 CFLAGS="$CFLAGS -mfancy-math-387"
705 AC_COMPILE_IFELSE([int i;],
706 [libgo_cv_c_fancymath=yes],
707 [libgo_cv_c_fancymath=no])
708 CFLAGS=$CFLAGS_hold])
710 if test "$libgo_cv_c_fancymath" = yes; then
711 MATH_FLAG="-mfancy-math-387 -funsafe-math-optimizations"
713 MATH_FLAG="-ffp-contract=off"
718 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
719 AC_CHECK_TYPES([off64_t])
722 dnl Work out the size of the epoll_events struct on GNU/Linux.
723 AC_CACHE_CHECK([epoll_event size],
724 [libgo_cv_c_epoll_event_size],
725 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
726 [sizeof (struct epoll_event)],
727 [#include <sys/epoll.h>],
728 [libgo_cv_c_epoll_event_size=0])])
729 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
730 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
732 dnl Work out the offset of the fd field in the epoll_events struct on
734 AC_CACHE_CHECK([epoll_event data.fd offset],
735 [libgo_cv_c_epoll_event_fd_offset],
736 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
737 [offsetof (struct epoll_event, data.fd)],
739 #include <sys/epoll.h>],
740 [libgo_cv_c_epoll_event_fd_offset=0])])
741 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
742 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
744 dnl Check if <sys/stat.h> uses timespec_t for st_?tim members. Introduced
745 dnl in Solaris 12 for XPG7 compatibility.
746 AC_EGREP_HEADER([timespec_t.*st_atim], [sys/stat.h],
747 [have_stat_timespec=yes], [have_stat_timespec=no])
748 AM_CONDITIONAL(HAVE_STAT_TIMESPEC, test $have_stat_timespec = yes)
750 dnl See if struct exception is defined in <math.h>.
751 AC_CHECK_TYPE([struct exception],
752 [libgo_has_struct_exception=yes],
753 [libgo_has_struct_exception=no],
755 if test "$libgo_has_struct_exception" = "yes"; then
756 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
757 [Define to 1 if <math.h> defines struct exception])
760 dnl See whether setcontext changes the value of TLS variables.
761 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
762 [libgo_cv_lib_setcontext_clobbers_tls],
763 [CFLAGS_hold="$CFLAGS"
764 CFLAGS="$PTHREAD_CFLAGS"
766 LIBS="$LIBS $PTHREAD_LIBS"
767 AC_CHECK_SIZEOF([void *])
768 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
773 #include <ucontext.h>
778 static char stack[[10 * 1024 * 1024]];
781 /* Called via makecontext/setcontext. */
789 /* Called via pthread_create. */
794 /* The thread should still see this value after calling
800 /* The call to setcontext should not return. */
809 /* The thread should not see this value. */
812 if (getcontext (&c) < 0)
815 c.uc_stack.ss_sp = stack;
816 #ifdef MAKECONTEXT_STACK_TOP
817 c.uc_stack.ss_sp += sizeof stack;
819 c.uc_stack.ss_flags = 0;
820 c.uc_stack.ss_size = sizeof stack;
822 makecontext (&c, cfn, 0);
824 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
827 if (pthread_join (tid, NULL) != 0)
830 /* The thread should have called exit. */
834 [libgo_cv_lib_setcontext_clobbers_tls=no],
835 [libgo_cv_lib_setcontext_clobbers_tls=yes],
836 [case "$target:$ptr_type_size" in
837 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
838 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
840 libgo_cv_lib_setcontext_clobbers_tls=no ;;
843 CFLAGS="$CFLAGS_hold"
846 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
847 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
848 [Define if setcontext clobbers TLS variables])
851 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
852 libgo_cv_ro_eh_frame, [
853 libgo_cv_ro_eh_frame=no
854 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
855 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
856 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
857 libgo_cv_ro_eh_frame=yes
858 elif grep '.section.*eh_frame.*#alloc' conftest.c \
859 | grep -v '#write' > /dev/null; then
860 libgo_cv_ro_eh_frame=yes
865 if test "x$libgo_cv_ro_eh_frame" = xyes; then
866 AC_DEFINE(EH_FRAME_FLAGS, "a",
867 [Define to the flags needed for the .section .eh_frame directive.])
869 AC_DEFINE(EH_FRAME_FLAGS, "aw",
870 [Define to the flags needed for the .section .eh_frame directive.])
873 AC_CACHE_CHECK([if compiler supports -Qunused-arguments],
874 [libgo_cv_c_unused_arguments],
876 CFLAGS="$CFLAGS -Qunused-arguments"
877 AC_COMPILE_IFELSE([[int i;]],
878 [libgo_cv_c_unused_arguments=yes],
879 [libgo_cv_c_unused_arguments=no])
880 CFLAGS=$CFLAGS_hold])
882 AC_CACHE_CHECK([if assembler supports GNU comdat group syntax],
883 libgo_cv_as_comdat_gnu, [
884 echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s
886 if test "$libgo_cv_c_unused_arguments" = yes; then
887 CFLAGS="$CFLAGS -Qunused-arguments"
889 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
890 libgo_cv_as_comdat_gnu=yes
892 libgo_cv_as_comdat_gnu=no
896 if test "x$libgo_cv_as_comdat_gnu" = xyes; then
897 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1,
898 [Define if your assembler supports GNU comdat group syntax.])
901 AC_CACHE_CHECK([assembler supports pc related relocs],
902 libgo_cv_as_x86_pcrel, [
903 libgo_cv_as_x86_pcrel=yes
904 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
906 if test "$libgo_cv_c_unused_arguments" = yes; then
907 CFLAGS="$CFLAGS -Qunused-arguments"
909 if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
910 libgo_cv_as_x86_pcrel=no
914 if test "x$libgo_cv_as_x86_pcrel" = xyes; then
915 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
916 [Define if your assembler supports PC relative relocs.])
919 AC_CACHE_CHECK([assembler supports unwind section type],
920 libgo_cv_as_x86_64_unwind_section_type, [
921 libgo_cv_as_x86_64_unwind_section_type=yes
922 echo '.section .eh_frame,"a",@unwind' > conftest.s
924 if test "$libgo_cv_c_unused_arguments" = yes; then
925 CFLAGS="$CFLAGS -Qunused-arguments"
927 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
928 libgo_cv_as_x86_64_unwind_section_type=no
932 if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then
933 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
934 [Define if your assembler supports unwind section type.])
937 AC_CACHE_CHECK([assembler supports AES instructions],
938 libgo_cv_as_x86_aes, [
939 libgo_cv_as_x86_aes=yes
940 echo 'aesenc %xmm0, %xmm1' > conftest.s
942 if test "$libgo_cv_c_unused_arguments" = yes; then
943 CFLAGS="$CFLAGS -Qunused-arguments"
945 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i error > /dev/null; then
946 libgo_cv_as_x86_aes=no
950 if test "x$libgo_cv_as_x86_aes" = xyes; then
951 AC_DEFINE(HAVE_AS_X86_AES, 1,
952 [Define if your assembler supports AES instructions.])
957 if test ${multilib} = yes; then
958 multilib_arg="--enable-multilib"
963 AC_CONFIG_FILES(Makefile testsuite/Makefile)
965 AC_CONFIG_COMMANDS([default],
966 [if test -n "$CONFIG_FILES"; then
967 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
968 # that multilib installs will end up installed in the correct place.
969 # The testsuite needs it for multilib-aware ABI baseline files.
970 # To work around this not being passed down from config-ml.in ->
971 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
972 # append it here. Only modify Makefiles that have just been created.
974 # Also, get rid of this simulated-VPATH thing that automake does.
976 s!`test -f '$<' || echo '$(srcdir)/'`!!
978 for i in $SUBDIRS; do
979 case $CONFIG_FILES in
981 #echo "Adding MULTISUBDIR to $i/Makefile"
982 sed -f vpsed $i/Makefile > tmp
983 grep '^MULTISUBDIR =' Makefile >> tmp
992 # Variables needed in config.status (file generation) which aren't already
993 # passed by autoconf.