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 mips64pe32le 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="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
424 dnl Use -fsplit-stack when compiling C code if available.
425 AC_CACHE_CHECK([whether -fsplit-stack is supported],
426 [libgo_cv_c_split_stack_supported],
428 CFLAGS="$CFLAGS -fsplit-stack"
429 AC_COMPILE_IFELSE([[int i;]],
430 [libgo_cv_c_split_stack_supported=yes],
431 [libgo_cv_c_split_stack_supported=no])
432 CFLAGS=$CFLAGS_hold])
434 dnl Make sure the linker permits -fsplit-stack. Old versions of gold will
435 dnl reject split-stack code calling non-split-stack code on targets
436 dnl they don't support.
437 AC_CACHE_CHECK([whether linker supports split/non-split linked together],
438 [libgo_cv_c_linker_split_non_split],
439 [cat > conftest1.c << EOF
441 int main() { f(); return 0; }
443 cat > conftest2.c << EOF
446 $CC -c -fsplit-stack $CFLAGS $CPPFLAGS conftest1.c >/dev/null 2>&1
447 $CC -c $CFLAGS $CPPFLAGS conftest2.c > /dev/null 2>&1
448 if $CC -o conftest conftest1.$ac_objext conftest2.$ac_objext > /dev/null 2>&1; then
449 libgo_cv_c_linker_split_non_split=yes
451 libgo_cv_c_linker_split_non_split=no
453 rm -f conftest1.* conftest2.* conftest])
455 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes; then
456 SPLIT_STACK=-fsplit-stack
457 AC_DEFINE(USING_SPLIT_STACK, 1,
458 [Define if the compiler supports -fsplit-stack])
462 AC_SUBST(SPLIT_STACK)
463 AM_CONDITIONAL(USING_SPLIT_STACK,
464 test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes)
466 dnl If the compiler supports split-stack but the linker does not, then
467 dnl we need to explicitly disable split-stack for Go.
468 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = no; then
469 GO_SPLIT_STACK=-fno-split-stack
473 AC_SUBST(GO_SPLIT_STACK)
475 dnl Check whether the linker does stack munging when calling from
476 dnl split-stack into non-split-stack code. We check this by looking
477 dnl at the --help output. FIXME: This is only half right: it's
478 dnl possible for the linker to support this for some targets but not
480 dnl This is slightly different from the above check, which is whether
481 dnl the linker permits the call at all.
482 AC_CACHE_CHECK([whether linker supports split stack],
483 [libgo_cv_c_linker_supports_split_stack],
484 [libgo_cv_c_linker_supports_split_stack=no
485 if $GOC -Wl,--help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
486 libgo_cv_c_linker_supports_split_stack=yes
488 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
489 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
490 [Define if the linker support split stack adjustments])
493 AC_CACHE_CHECK([whether compiler is llgo],
494 [libgo_cv_c_goc_is_llgo],
495 [libgo_cv_c_goc_is_llgo=no
496 if $GOC -dumpversion 2>/dev/null | grep llgo >/dev/null 2>&1; then
497 libgo_cv_c_goc_is_llgo=yes
499 AM_CONDITIONAL(GOC_IS_LLGO, test "$libgo_cv_c_goc_is_llgo" = yes)
501 dnl Test for the -lm library.
503 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
506 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
507 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
508 [libgo_cv_lib_sockets=
510 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
511 if test "$libgo_check_socket" = "yes"; then
512 unset ac_cv_func_connect
513 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
514 libgo_check_both=yes)
516 if test "$libgo_check_both" = "yes"; then
518 LIBS="$LIBS -lsocket -lnsl"
519 unset ac_cv_func_accept
520 AC_CHECK_FUNC(accept,
522 libgo_cv_lib_sockets="-lsocket -lnsl"])
523 unset ac_cv_func_accept
526 unset ac_cv_func_gethostbyname
527 libgo_old_libs="$LIBS"
528 AC_CHECK_FUNC(gethostbyname, ,
529 [AC_CHECK_LIB(nsl, main,
530 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
531 unset ac_cv_func_gethostbyname
532 AC_CHECK_FUNC(sendfile, ,
533 [AC_CHECK_LIB(sendfile, main,
534 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lsendfile"])])
537 NET_LIBS="$libgo_cv_lib_sockets"
540 dnl Test whether the compiler supports the -pthread option.
541 AC_CACHE_CHECK([whether -pthread is supported],
542 [libgo_cv_lib_pthread],
544 CFLAGS="$CFLAGS -pthread"
545 AC_COMPILE_IFELSE([[int i;]],
546 [libgo_cv_lib_pthread=yes],
547 [libgo_cv_lib_pthread=no])
548 CFLAGS=$CFLAGS_hold])
550 if test "$libgo_cv_lib_pthread" = yes; then
551 PTHREAD_CFLAGS=-pthread
553 AC_SUBST(PTHREAD_CFLAGS)
555 dnl Test for the -lpthread library.
557 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
558 AC_SUBST(PTHREAD_LIBS)
560 dnl Test if -lrt is required for sched_yield or nanosleep or clock_gettime.
561 AC_SEARCH_LIBS([sched_yield], [rt])
562 AC_SEARCH_LIBS([nanosleep], [rt])
563 AC_SEARCH_LIBS([clock_gettime], [rt])
567 GCC_CHECK_UNWIND_GETIPINFO
569 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)
571 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
572 [#ifdef HAVE_SYS_SOCKET_H
573 #include <sys/socket.h>
577 AC_CACHE_CHECK([whether <ustat.h> can be used],
578 [libgo_cv_c_ustat_h],
580 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE $OSCFLAGS"
583 #include <sys/types.h>
584 #ifdef HAVE_LINUX_FILTER_H
585 #include <linux/filter.h>
588 ])], [libgo_cv_c_ustat_h=yes], [libgo_cv_c_ustat_h=no])
589 CFLAGS=$CFLAGS_hold])
590 if test $libgo_cv_c_ustat_h = yes; then
591 AC_DEFINE(HAVE_USTAT_H, 1,
592 [Define to 1 if you have the <ustat.h> header file and it works.])
595 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
597 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv unsetenv dl_iterate_phdr)
598 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
599 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
601 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)
603 AC_CHECK_TYPES([loff_t])
607 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
610 CFLAGS_hold="$CFLAGS"
611 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
613 LIBS="$LIBS $PTHREAD_LIBS"
614 AC_CHECK_FUNCS(sem_timedwait)
615 CFLAGS="$CFLAGS_hold"
619 LIBS="$LIBS $MATH_LIBS"
620 AC_CHECK_FUNCS(matherr)
623 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4],
624 [libgo_cv_func___sync_bool_compare_and_swap_4],
626 typedef unsigned int uint32 __attribute__ ((mode (SI)));
628 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
630 [libgo_cv_func___sync_bool_compare_and_swap_4=yes],
631 [libgo_cv_func___sync_bool_compare_and_swap_4=no])])
632 if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then
633 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1,
634 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32])
637 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_8],
638 [libgo_cv_func___sync_bool_compare_and_swap_8],
640 typedef unsigned int uint64 __attribute__ ((mode (DI)));
642 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
644 [libgo_cv_func___sync_bool_compare_and_swap_8=yes],
645 [libgo_cv_func___sync_bool_compare_and_swap_8=no])])
646 if test "$libgo_cv_func___sync_bool_compare_and_swap_8" = "yes"; then
647 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_8, 1,
648 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint64])
651 AC_CACHE_CHECK([for __sync_fetch_and_add_4],
652 [libgo_cv_func___sync_fetch_and_add_4],
654 typedef unsigned int uint32 __attribute__ ((mode (SI)));
656 int main() { return __sync_fetch_and_add (&i, 1); }
658 [libgo_cv_func___sync_fetch_and_add_4=yes],
659 [libgo_cv_func___sync_fetch_and_add_4=no])])
660 if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then
661 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1,
662 [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32])
665 AC_CACHE_CHECK([for __sync_add_and_fetch_8],
666 [libgo_cv_func___sync_add_and_fetch_8],
668 typedef unsigned int uint64 __attribute__ ((mode (DI)));
670 int main() { return __sync_add_and_fetch (&i, 1); }
672 [libgo_cv_func___sync_add_and_fetch_8=yes],
673 [libgo_cv_func___sync_add_and_fetch_8=no])])
674 if test "$libgo_cv_func___sync_add_and_fetch_8" = "yes"; then
675 AC_DEFINE(HAVE_SYNC_ADD_AND_FETCH_8, 1,
676 [Define to 1 if the compiler provides the __sync_add_and_fetch function for uint64])
679 dnl For x86 we want to use the -minline-all-stringops option to avoid
680 dnl forcing a stack split when calling memcpy and friends.
681 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
682 [libgo_cv_c_stringops],
684 CFLAGS="$CFLAGS -minline-all-stringops"
685 AC_COMPILE_IFELSE([int i;],
686 [libgo_cv_c_stringops=yes],
687 [libgo_cv_c_stringops=no])
688 CFLAGS=$CFLAGS_hold])
690 if test "$libgo_cv_c_stringops" = yes; then
691 STRINGOPS_FLAG=-minline-all-stringops
693 AC_SUBST(STRINGOPS_FLAG)
695 dnl For x86 we want to compile the math library with -mfancy-math-387
696 dnl -funsafe-math-optimizations so that we can use the builtin
697 dnl instructions directly.
698 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
699 [libgo_cv_c_fancymath],
701 CFLAGS="$CFLAGS -mfancy-math-387"
702 AC_COMPILE_IFELSE([int i;],
703 [libgo_cv_c_fancymath=yes],
704 [libgo_cv_c_fancymath=no])
705 CFLAGS=$CFLAGS_hold])
707 if test "$libgo_cv_c_fancymath" = yes; then
708 MATH_FLAG="-mfancy-math-387 -funsafe-math-optimizations"
710 MATH_FLAG="-ffp-contract=off"
715 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
716 AC_CHECK_TYPES([off64_t])
719 dnl Work out the size of the epoll_events struct on GNU/Linux.
720 AC_CACHE_CHECK([epoll_event size],
721 [libgo_cv_c_epoll_event_size],
722 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
723 [sizeof (struct epoll_event)],
724 [#include <sys/epoll.h>],
725 [libgo_cv_c_epoll_event_size=0])])
726 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
727 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
729 dnl Work out the offset of the fd field in the epoll_events struct on
731 AC_CACHE_CHECK([epoll_event data.fd offset],
732 [libgo_cv_c_epoll_event_fd_offset],
733 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
734 [offsetof (struct epoll_event, data.fd)],
736 #include <sys/epoll.h>],
737 [libgo_cv_c_epoll_event_fd_offset=0])])
738 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
739 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
741 dnl Check if <sys/stat.h> uses timespec_t for st_?tim members. Introduced
742 dnl in Solaris 12 for XPG7 compatibility.
743 AC_EGREP_HEADER([timespec_t.*st_atim], [sys/stat.h],
744 [have_stat_timespec=yes], [have_stat_timespec=no])
745 AM_CONDITIONAL(HAVE_STAT_TIMESPEC, test $have_stat_timespec = yes)
747 dnl See if struct exception is defined in <math.h>.
748 AC_CHECK_TYPE([struct exception],
749 [libgo_has_struct_exception=yes],
750 [libgo_has_struct_exception=no],
752 if test "$libgo_has_struct_exception" = "yes"; then
753 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
754 [Define to 1 if <math.h> defines struct exception])
757 dnl See whether setcontext changes the value of TLS variables.
758 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
759 [libgo_cv_lib_setcontext_clobbers_tls],
760 [CFLAGS_hold="$CFLAGS"
761 CFLAGS="$PTHREAD_CFLAGS"
763 LIBS="$LIBS $PTHREAD_LIBS"
764 AC_CHECK_SIZEOF([void *])
765 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
770 #include <ucontext.h>
775 static char stack[[10 * 1024 * 1024]];
778 /* Called via makecontext/setcontext. */
786 /* Called via pthread_create. */
791 /* The thread should still see this value after calling
797 /* The call to setcontext should not return. */
806 /* The thread should not see this value. */
809 if (getcontext (&c) < 0)
812 c.uc_stack.ss_sp = stack;
813 #ifdef MAKECONTEXT_STACK_TOP
814 c.uc_stack.ss_sp += sizeof stack;
816 c.uc_stack.ss_flags = 0;
817 c.uc_stack.ss_size = sizeof stack;
819 makecontext (&c, cfn, 0);
821 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
824 if (pthread_join (tid, NULL) != 0)
827 /* The thread should have called exit. */
831 [libgo_cv_lib_setcontext_clobbers_tls=no],
832 [libgo_cv_lib_setcontext_clobbers_tls=yes],
833 [case "$target:$ptr_type_size" in
834 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
835 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
837 libgo_cv_lib_setcontext_clobbers_tls=no ;;
840 CFLAGS="$CFLAGS_hold"
843 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
844 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
845 [Define if setcontext clobbers TLS variables])
848 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
849 libgo_cv_ro_eh_frame, [
850 libgo_cv_ro_eh_frame=no
851 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
852 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
853 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
854 libgo_cv_ro_eh_frame=yes
855 elif grep '.section.*eh_frame.*#alloc' conftest.c \
856 | grep -v '#write' > /dev/null; then
857 libgo_cv_ro_eh_frame=yes
862 if test "x$libgo_cv_ro_eh_frame" = xyes; then
863 AC_DEFINE(EH_FRAME_FLAGS, "a",
864 [Define to the flags needed for the .section .eh_frame directive.])
866 AC_DEFINE(EH_FRAME_FLAGS, "aw",
867 [Define to the flags needed for the .section .eh_frame directive.])
870 AC_CACHE_CHECK([if compiler supports -Qunused-arguments],
871 [libgo_cv_c_unused_arguments],
873 CFLAGS="$CFLAGS -Qunused-arguments"
874 AC_COMPILE_IFELSE([[int i;]],
875 [libgo_cv_c_unused_arguments=yes],
876 [libgo_cv_c_unused_arguments=no])
877 CFLAGS=$CFLAGS_hold])
879 AC_CACHE_CHECK([if assembler supports GNU comdat group syntax],
880 libgo_cv_as_comdat_gnu, [
881 echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s
883 if test "$libgo_cv_c_unused_arguments" = yes; then
884 CFLAGS="$CFLAGS -Qunused-arguments"
886 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
887 libgo_cv_as_comdat_gnu=yes
889 libgo_cv_as_comdat_gnu=no
893 if test "x$libgo_cv_as_comdat_gnu" = xyes; then
894 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1,
895 [Define if your assembler supports GNU comdat group syntax.])
898 AC_CACHE_CHECK([assembler supports pc related relocs],
899 libgo_cv_as_x86_pcrel, [
900 libgo_cv_as_x86_pcrel=yes
901 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
903 if test "$libgo_cv_c_unused_arguments" = yes; then
904 CFLAGS="$CFLAGS -Qunused-arguments"
906 if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
907 libgo_cv_as_x86_pcrel=no
911 if test "x$libgo_cv_as_x86_pcrel" = xyes; then
912 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
913 [Define if your assembler supports PC relative relocs.])
916 AC_CACHE_CHECK([assembler supports unwind section type],
917 libgo_cv_as_x86_64_unwind_section_type, [
918 libgo_cv_as_x86_64_unwind_section_type=yes
919 echo '.section .eh_frame,"a",@unwind' > conftest.s
921 if test "$libgo_cv_c_unused_arguments" = yes; then
922 CFLAGS="$CFLAGS -Qunused-arguments"
924 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
925 libgo_cv_as_x86_64_unwind_section_type=no
929 if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then
930 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
931 [Define if your assembler supports unwind section type.])
936 if test ${multilib} = yes; then
937 multilib_arg="--enable-multilib"
942 AC_CONFIG_FILES(Makefile testsuite/Makefile)
944 AC_CONFIG_COMMANDS([default],
945 [if test -n "$CONFIG_FILES"; then
946 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
947 # that multilib installs will end up installed in the correct place.
948 # The testsuite needs it for multilib-aware ABI baseline files.
949 # To work around this not being passed down from config-ml.in ->
950 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
951 # append it here. Only modify Makefiles that have just been created.
953 # Also, get rid of this simulated-VPATH thing that automake does.
955 s!`test -f '$<' || echo '$(srcdir)/'`!!
957 for i in $SUBDIRS; do
958 case $CONFIG_FILES in
960 #echo "Adding MULTISUBDIR to $i/Makefile"
961 sed -f vpsed $i/Makefile > tmp
962 grep '^MULTISUBDIR =' Makefile >> tmp
971 # Variables needed in config.status (file generation) which aren't already
972 # passed by autoconf.