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)
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$(top_srcdir)/../libffi/include -I../libffi/include'
125 # See if the user wants to configure without libatomic. This is useful if we are
126 # on an architecture for which libgo does not need an atomic support library and
127 # libatomic does not support our C compiler.
128 AC_ARG_WITH(libatomic,
129 AS_HELP_STRING([--without-libatomic],
130 [don't use libatomic]),
132 [with_libatomic=${with_libatomic_default-yes}])
135 if test "$with_libatomic" != no; then
136 LIBATOMIC=../libatomic/libatomic_convenience.la
140 # Used to tell GNU make to include a file without telling automake to
142 go_include="-include"
156 *-*-darwin*) is_darwin=yes; GOOS=darwin ;;
157 *-*-freebsd*) is_freebsd=yes; GOOS=freebsd ;;
158 *-*-irix6*) is_irix=yes; GOOS=irix ;;
159 *-*-linux*) is_linux=yes; GOOS=linux ;;
160 *-*-netbsd*) is_netbsd=yes; GOOS=netbsd ;;
161 *-*-openbsd*) is_openbsd=yes; GOOS=openbsd ;;
162 *-*-dragonfly*) is_dragonfly=yes; GOOS=dragonfly ;;
163 *-*-rtems*) is_rtems=yes; GOOS=rtems ;;
164 *-*-solaris2*) is_solaris=yes; GOOS=solaris ;;
166 AM_CONDITIONAL(LIBGO_IS_DARWIN, test $is_darwin = yes)
167 AM_CONDITIONAL(LIBGO_IS_FREEBSD, test $is_freebsd = yes)
168 AM_CONDITIONAL(LIBGO_IS_IRIX, test $is_irix = yes)
169 AM_CONDITIONAL(LIBGO_IS_LINUX, test $is_linux = yes)
170 AM_CONDITIONAL(LIBGO_IS_NETBSD, test $is_netbsd = yes)
171 AM_CONDITIONAL(LIBGO_IS_OPENBSD, test $is_openbsd = yes)
172 AM_CONDITIONAL(LIBGO_IS_DRAGONFLY, test $is_dragonfly = yes)
173 AM_CONDITIONAL(LIBGO_IS_RTEMS, test $is_rtems = yes)
174 AM_CONDITIONAL(LIBGO_IS_SOLARIS, test $is_solaris = yes)
177 dnl Test whether we need to use DejaGNU or whether we can use the
178 dnl simpler gotest approach. We can only use gotest for a native
182 *-*-rtems*) USE_DEJAGNU=yes ;;
184 *) USE_DEJAGNU=yes ;;
186 AC_SUBST(USE_DEJAGNU)
188 dnl N.B. Keep in sync with gcc/testsuite/go.test/go-test.exp (go-set-goarch).
213 arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
218 i[34567]86-*-* | x86_64-*-*)
224 [is_386=yes], [is_x86_64=yes])
225 if test "$is_386" = "yes"; then
237 #if _MIPS_SIM != _ABIO32
242 #if _MIPS_SIM != _ABIN32
247 #if _MIPS_SIM != _ABI64
252 #if _MIPS_SIM != _ABIO64
256 [AC_MSG_ERROR([unknown MIPS ABI])
257 [mips_abi="n32"]])])])])
259 "o32") GOARCH=mipso32 ;;
260 "n32") GOARCH=mipsn32 ;;
261 "n64") GOARCH=mipsn64 ;;
262 "o64") GOARCH=mipso64 ;;
265 rs6000*-*-* | powerpc*-*-*)
272 #if defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN__)
275 [is_ppc64le=yes],[is_ppc64=yes])])
276 if test "$is_ppc" = "yes"; then
278 elif test "$is_ppc64" = "yes"; then
286 #if defined(__s390x__)
289 [is_s390=yes], [is_s390x=yes])
290 if test "$is_s390" = "yes"; then
298 #if defined(__sparcv9) || defined(__arch64__)
301 [is_sparc=yes], [is_sparc64=yes])
302 if test "$is_sparc" = "yes"; then
309 AM_CONDITIONAL(LIBGO_IS_386, test $is_386 = yes)
310 AM_CONDITIONAL(LIBGO_IS_ALPHA, test $is_alpha = yes)
311 AM_CONDITIONAL(LIBGO_IS_ARM, test $is_arm = yes)
312 AM_CONDITIONAL(LIBGO_IS_ARM64, test $is_arm64 = yes)
313 AM_CONDITIONAL(LIBGO_IS_M68K, test $is_m68k = yes)
314 AM_CONDITIONAL(LIBGO_IS_MIPS, test $mips_abi != unknown)
315 AM_CONDITIONAL(LIBGO_IS_MIPSO32, test $mips_abi = o32)
316 AM_CONDITIONAL(LIBGO_IS_MIPSN32, test $mips_abi = n32)
317 AM_CONDITIONAL(LIBGO_IS_MIPSN64, test $mips_abi = n64)
318 AM_CONDITIONAL(LIBGO_IS_MIPSO64, test $mips_abi = o64)
319 AM_CONDITIONAL(LIBGO_IS_PPC, test $is_ppc = yes)
320 AM_CONDITIONAL(LIBGO_IS_PPC64, test $is_ppc64 = yes)
321 AM_CONDITIONAL(LIBGO_IS_PPC64LE, test $is_ppc64le = yes)
322 AM_CONDITIONAL(LIBGO_IS_S390, test $is_s390 = yes)
323 AM_CONDITIONAL(LIBGO_IS_S390X, test $is_s390x = yes)
324 AM_CONDITIONAL(LIBGO_IS_SPARC, test $is_sparc = yes)
325 AM_CONDITIONAL(LIBGO_IS_SPARC64, test $is_sparc64 = yes)
326 AM_CONDITIONAL(LIBGO_IS_X86_64, test $is_x86_64 = yes)
329 dnl Some files are only present when needed for specific architectures.
331 GO_LIBCALL_OS_ARCH_FILE=
333 GO_SYSCALL_OS_ARCH_FILE=
334 if test -f "${srcdir}/go/syscall/libcall_${GOOS}.go"; then
335 GO_LIBCALL_OS_FILE="go/syscall/libcall_${GOOS}.go"
337 if test -f "${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go"; then
338 GO_LIBCALL_OS_ARCH_FILE="go/syscall/libcall_${GOOS}_${GOARCH}.go"
340 if test -f "${srcdir}/go/syscall/syscall_${GOOS}.go"; then
341 GO_SYSCALL_OS_FILE="go/syscall/syscall_${GOOS}.go"
343 if test -f "${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go"; then
344 GO_SYSCALL_OS_ARCH_FILE="go/syscall/syscall_${GOOS}_${GOARCH}.go"
346 AC_SUBST(GO_LIBCALL_OS_FILE)
347 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
348 AC_SUBST(GO_SYSCALL_OS_FILE)
349 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
351 dnl Special flags used to generate sysinfo.go.
352 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
355 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
356 # msghdr in <sys/socket.h>.
357 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
359 *-*-solaris2.1[[01]])
360 # Solaris 10+ needs this so struct msghdr gets the msg_control
361 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
362 # above doesn't work with C99.
363 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
368 dnl Use -fsplit-stack when compiling C code if available.
369 AC_CACHE_CHECK([whether -fsplit-stack is supported],
370 [libgo_cv_c_split_stack_supported],
372 CFLAGS="$CFLAGS -fsplit-stack"
373 AC_COMPILE_IFELSE([[int i;]],
374 [libgo_cv_c_split_stack_supported=yes],
375 [libgo_cv_c_split_stack_supported=no])
376 CFLAGS=$CFLAGS_hold])
378 dnl Make sure the linker permits -fsplit-stack. Old versions of gold will
379 dnl reject split-stack code calling non-split-stack code on targets
380 dnl they don't support.
381 AC_CACHE_CHECK([whether linker supports split/non-split linked together],
382 [libgo_cv_c_linker_split_non_split],
383 [cat > conftest1.c << EOF
385 int main() { f(); return 0; }
387 cat > conftest2.c << EOF
390 $CC -c -fsplit-stack $CFLAGS $CPPFLAGS conftest1.c
391 $CC -c $CFLAGS $CPPFLAGS conftest2.c
392 if $CC -o conftest conftest1.$ac_objext conftest2.$ac_objext; then
393 libgo_cv_c_linker_split_non_split=yes
395 libgo_cv_c_linker_split_non_split=no
397 rm -f conftest1.* conftest2.* conftest])
399 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes; then
400 SPLIT_STACK=-fsplit-stack
401 AC_DEFINE(USING_SPLIT_STACK, 1,
402 [Define if the compiler supports -fsplit-stack])
406 AC_SUBST(SPLIT_STACK)
407 AM_CONDITIONAL(USING_SPLIT_STACK,
408 test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes)
410 dnl If the compiler supports split-stack but the linker does not, then
411 dnl we need to explicitly disable split-stack for Go.
412 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = no; then
413 GO_SPLIT_STACK=-fno-split-stack
417 AC_SUBST(GO_SPLIT_STACK)
419 dnl Check whether the linker does stack munging when calling from
420 dnl split-stack into non-split-stack code. We check this by looking
421 dnl at the --help output. FIXME: This is only half right: it's
422 dnl possible for the linker to support this for some targets but not
424 dnl This is slightly different from the above check, which is whether
425 dnl the linker permits the call at all.
426 AC_CACHE_CHECK([whether linker supports split stack],
427 [libgo_cv_c_linker_supports_split_stack],
428 [libgo_cv_c_linker_supports_split_stack=no
429 if $GOC -Wl,--help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
430 libgo_cv_c_linker_supports_split_stack=yes
432 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
433 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
434 [Define if the linker support split stack adjustments])
437 AC_CACHE_CHECK([whether compiler is llgo],
438 [libgo_cv_c_goc_is_llgo],
439 [libgo_cv_c_goc_is_llgo=no
440 if $GOC -dumpversion 2>/dev/null | grep llgo >/dev/null 2>&1; then
441 libgo_cv_c_goc_is_llgo=yes
443 AM_CONDITIONAL(GOC_IS_LLGO, test "$libgo_cv_c_goc_is_llgo" = yes)
445 dnl Test for the -lm library.
447 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
450 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
451 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
452 [libgo_cv_lib_sockets=
454 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
455 if test "$libgo_check_socket" = "yes"; then
456 unset ac_cv_func_connect
457 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
458 libgo_check_both=yes)
460 if test "$libgo_check_both" = "yes"; then
462 LIBS="$LIBS -lsocket -lnsl"
463 unset ac_cv_func_accept
464 AC_CHECK_FUNC(accept,
466 libgo_cv_lib_sockets="-lsocket -lnsl"])
467 unset ac_cv_func_accept
470 unset ac_cv_func_gethostbyname
471 libgo_old_libs="$LIBS"
472 AC_CHECK_FUNC(gethostbyname, ,
473 [AC_CHECK_LIB(nsl, main,
474 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
475 unset ac_cv_func_gethostbyname
476 AC_CHECK_FUNC(sendfile, ,
477 [AC_CHECK_LIB(sendfile, main,
478 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lsendfile"])])
481 NET_LIBS="$libgo_cv_lib_sockets"
484 dnl Test whether the compiler supports the -pthread option.
485 AC_CACHE_CHECK([whether -pthread is supported],
486 [libgo_cv_lib_pthread],
488 CFLAGS="$CFLAGS -pthread"
489 AC_COMPILE_IFELSE([[int i;]],
490 [libgo_cv_lib_pthread=yes],
491 [libgo_cv_lib_pthread=no])
492 CFLAGS=$CFLAGS_hold])
494 if test "$libgo_cv_lib_pthread" = yes; then
495 PTHREAD_CFLAGS=-pthread
497 AC_SUBST(PTHREAD_CFLAGS)
499 dnl Test for the -lpthread library.
501 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
502 AC_SUBST(PTHREAD_LIBS)
504 dnl Test if -lrt is required for sched_yield or nanosleep or clock_gettime.
505 AC_SEARCH_LIBS([sched_yield], [rt])
506 AC_SEARCH_LIBS([nanosleep], [rt])
507 AC_SEARCH_LIBS([clock_gettime], [rt])
511 GCC_CHECK_UNWIND_GETIPINFO
513 AC_CHECK_HEADERS(sched.h sys/file.h sys/mman.h syscall.h sys/epoll.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)
515 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
516 [#ifdef HAVE_SYS_SOCKET_H
517 #include <sys/socket.h>
521 AC_CACHE_CHECK([whether <ustat.h> can be used],
522 [libgo_cv_c_ustat_h],
524 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE $OSCFLAGS"
527 #include <sys/types.h>
528 #ifdef HAVE_LINUX_FILTER_H
529 #include <linux/filter.h>
532 ])], [libgo_cv_c_ustat_h=yes], [libgo_cv_c_ustat_h=no])
533 CFLAGS=$CFLAGS_hold])
534 if test $libgo_cv_c_ustat_h = yes; then
535 AC_DEFINE(HAVE_USTAT_H, 1,
536 [Define to 1 if you have the <ustat.h> header file and it works.])
539 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
541 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv unsetenv dl_iterate_phdr)
542 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
543 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
545 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)
547 AC_CHECK_TYPES([loff_t])
551 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
554 CFLAGS_hold="$CFLAGS"
555 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
557 LIBS="$LIBS $PTHREAD_LIBS"
558 AC_CHECK_FUNCS(sem_timedwait)
559 CFLAGS="$CFLAGS_hold"
563 LIBS="$LIBS $MATH_LIBS"
564 AC_CHECK_FUNCS(matherr)
567 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4],
568 [libgo_cv_func___sync_bool_compare_and_swap_4],
570 typedef unsigned int uint32 __attribute__ ((mode (SI)));
572 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
574 [libgo_cv_func___sync_bool_compare_and_swap_4=yes],
575 [libgo_cv_func___sync_bool_compare_and_swap_4=no])])
576 if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then
577 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1,
578 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32])
581 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_8],
582 [libgo_cv_func___sync_bool_compare_and_swap_8],
584 typedef unsigned int uint64 __attribute__ ((mode (DI)));
586 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
588 [libgo_cv_func___sync_bool_compare_and_swap_8=yes],
589 [libgo_cv_func___sync_bool_compare_and_swap_8=no])])
590 if test "$libgo_cv_func___sync_bool_compare_and_swap_8" = "yes"; then
591 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_8, 1,
592 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint64])
595 AC_CACHE_CHECK([for __sync_fetch_and_add_4],
596 [libgo_cv_func___sync_fetch_and_add_4],
598 typedef unsigned int uint32 __attribute__ ((mode (SI)));
600 int main() { return __sync_fetch_and_add (&i, 1); }
602 [libgo_cv_func___sync_fetch_and_add_4=yes],
603 [libgo_cv_func___sync_fetch_and_add_4=no])])
604 if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then
605 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1,
606 [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32])
609 AC_CACHE_CHECK([for __sync_add_and_fetch_8],
610 [libgo_cv_func___sync_add_and_fetch_8],
612 typedef unsigned int uint64 __attribute__ ((mode (DI)));
614 int main() { return __sync_add_and_fetch (&i, 1); }
616 [libgo_cv_func___sync_add_and_fetch_8=yes],
617 [libgo_cv_func___sync_add_and_fetch_8=no])])
618 if test "$libgo_cv_func___sync_add_and_fetch_8" = "yes"; then
619 AC_DEFINE(HAVE_SYNC_ADD_AND_FETCH_8, 1,
620 [Define to 1 if the compiler provides the __sync_add_and_fetch function for uint64])
623 dnl For x86 we want to use the -minline-all-stringops option to avoid
624 dnl forcing a stack split when calling memcpy and friends.
625 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
626 [libgo_cv_c_stringops],
628 CFLAGS="$CFLAGS -minline-all-stringops"
629 AC_COMPILE_IFELSE([int i;],
630 [libgo_cv_c_stringops=yes],
631 [libgo_cv_c_stringops=no])
632 CFLAGS=$CFLAGS_hold])
634 if test "$libgo_cv_c_stringops" = yes; then
635 STRINGOPS_FLAG=-minline-all-stringops
637 AC_SUBST(STRINGOPS_FLAG)
639 dnl For x86 we want to compile the math library with -mfancy-math-387
640 dnl -funsafe-math-optimizations so that we can use the builtin
641 dnl instructions directly.
642 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
643 [libgo_cv_c_fancymath],
645 CFLAGS="$CFLAGS -mfancy-math-387"
646 AC_COMPILE_IFELSE([int i;],
647 [libgo_cv_c_fancymath=yes],
648 [libgo_cv_c_fancymath=no])
649 CFLAGS=$CFLAGS_hold])
651 if test "$libgo_cv_c_fancymath" = yes; then
652 MATH_FLAG="-mfancy-math-387 -funsafe-math-optimizations"
654 MATH_FLAG="-ffp-contract=off"
659 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
660 AC_CHECK_TYPES([off64_t])
663 dnl Work out the size of the epoll_events struct on GNU/Linux.
664 AC_CACHE_CHECK([epoll_event size],
665 [libgo_cv_c_epoll_event_size],
666 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
667 [sizeof (struct epoll_event)],
668 [#include <sys/epoll.h>],
669 [libgo_cv_c_epoll_event_size=0])])
670 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
671 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
673 dnl Work out the offset of the fd field in the epoll_events struct on
675 AC_CACHE_CHECK([epoll_event data.fd offset],
676 [libgo_cv_c_epoll_event_fd_offset],
677 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
678 [offsetof (struct epoll_event, data.fd)],
680 #include <sys/epoll.h>],
681 [libgo_cv_c_epoll_event_fd_offset=0])])
682 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
683 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
685 dnl Check if <sys/stat.h> uses timespec_t for st_?tim members. Introduced
686 dnl in Solaris 12 for XPG7 compatibility.
687 AC_EGREP_HEADER([timespec_t.*st_atim], [sys/stat.h],
688 [have_stat_timespec=yes], [have_stat_timespec=no])
689 AM_CONDITIONAL(HAVE_STAT_TIMESPEC, test $have_stat_timespec = yes)
691 dnl See if struct exception is defined in <math.h>.
692 AC_CHECK_TYPE([struct exception],
693 [libgo_has_struct_exception=yes],
694 [libgo_has_struct_exception=no],
696 if test "$libgo_has_struct_exception" = "yes"; then
697 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
698 [Define to 1 if <math.h> defines struct exception])
701 dnl See whether setcontext changes the value of TLS variables.
702 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
703 [libgo_cv_lib_setcontext_clobbers_tls],
704 [CFLAGS_hold="$CFLAGS"
705 CFLAGS="$PTHREAD_CFLAGS"
707 LIBS="$LIBS $PTHREAD_LIBS"
708 AC_CHECK_SIZEOF([void *])
709 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
714 #include <ucontext.h>
719 static char stack[[10 * 1024 * 1024]];
722 /* Called via makecontext/setcontext. */
730 /* Called via pthread_create. */
735 /* The thread should still see this value after calling
741 /* The call to setcontext should not return. */
750 /* The thread should not see this value. */
753 if (getcontext (&c) < 0)
756 c.uc_stack.ss_sp = stack;
757 #ifdef MAKECONTEXT_STACK_TOP
758 c.uc_stack.ss_sp += sizeof stack;
760 c.uc_stack.ss_flags = 0;
761 c.uc_stack.ss_size = sizeof stack;
763 makecontext (&c, cfn, 0);
765 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
768 if (pthread_join (tid, NULL) != 0)
771 /* The thread should have called exit. */
775 [libgo_cv_lib_setcontext_clobbers_tls=no],
776 [libgo_cv_lib_setcontext_clobbers_tls=yes],
777 [case "$target:$ptr_type_size" in
778 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
779 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
781 libgo_cv_lib_setcontext_clobbers_tls=no ;;
784 CFLAGS="$CFLAGS_hold"
787 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
788 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
789 [Define if setcontext clobbers TLS variables])
792 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
793 libgo_cv_ro_eh_frame, [
794 libgo_cv_ro_eh_frame=no
795 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
796 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
797 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
798 libgo_cv_ro_eh_frame=yes
799 elif grep '.section.*eh_frame.*#alloc' conftest.c \
800 | grep -v '#write' > /dev/null; then
801 libgo_cv_ro_eh_frame=yes
806 if test "x$libgo_cv_ro_eh_frame" = xyes; then
807 AC_DEFINE(EH_FRAME_FLAGS, "a",
808 [Define to the flags needed for the .section .eh_frame directive.])
810 AC_DEFINE(EH_FRAME_FLAGS, "aw",
811 [Define to the flags needed for the .section .eh_frame directive.])
814 AC_CACHE_CHECK([if compiler supports -Qunused-arguments],
815 [libgo_cv_c_unused_arguments],
817 CFLAGS="$CFLAGS -Qunused-arguments"
818 AC_COMPILE_IFELSE([[int i;]],
819 [libgo_cv_c_unused_arguments=yes],
820 [libgo_cv_c_unused_arguments=no])
821 CFLAGS=$CFLAGS_hold])
823 AC_CACHE_CHECK([if assembler supports GNU comdat group syntax],
824 libgo_cv_as_comdat_gnu, [
825 echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s
827 if test "$libgo_cv_c_unused_arguments" = yes; then
828 CFLAGS="$CFLAGS -Qunused-arguments"
830 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
831 libgo_cv_as_comdat_gnu=yes
833 libgo_cv_as_comdat_gnu=no
837 if test "x$libgo_cv_as_comdat_gnu" = xyes; then
838 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1,
839 [Define if your assembler supports GNU comdat group syntax.])
842 AC_CACHE_CHECK([assembler supports pc related relocs],
843 libgo_cv_as_x86_pcrel, [
844 libgo_cv_as_x86_pcrel=yes
845 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
847 if test "$libgo_cv_c_unused_arguments" = yes; then
848 CFLAGS="$CFLAGS -Qunused-arguments"
850 if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
851 libgo_cv_as_x86_pcrel=no
855 if test "x$libgo_cv_as_x86_pcrel" = xyes; then
856 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
857 [Define if your assembler supports PC relative relocs.])
860 AC_CACHE_CHECK([assembler supports unwind section type],
861 libgo_cv_as_x86_64_unwind_section_type, [
862 libgo_cv_as_x86_64_unwind_section_type=yes
863 echo '.section .eh_frame,"a",@unwind' > conftest.s
865 if test "$libgo_cv_c_unused_arguments" = yes; then
866 CFLAGS="$CFLAGS -Qunused-arguments"
868 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
869 libgo_cv_as_x86_64_unwind_section_type=no
873 if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then
874 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
875 [Define if your assembler supports unwind section type.])
880 if test ${multilib} = yes; then
881 multilib_arg="--enable-multilib"
886 AC_CONFIG_FILES(Makefile testsuite/Makefile)
888 AC_CONFIG_COMMANDS([default],
889 [if test -n "$CONFIG_FILES"; then
890 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
891 # that multilib installs will end up installed in the correct place.
892 # The testsuite needs it for multilib-aware ABI baseline files.
893 # To work around this not being passed down from config-ml.in ->
894 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
895 # append it here. Only modify Makefiles that have just been created.
897 # Also, get rid of this simulated-VPATH thing that automake does.
899 s!`test -f '$<' || echo '$(srcdir)/'`!!
901 for i in $SUBDIRS; do
902 case $CONFIG_FILES in
904 #echo "Adding MULTISUBDIR to $i/Makefile"
905 sed -f vpsed $i/Makefile > tmp
906 grep '^MULTISUBDIR =' Makefile >> tmp
915 # Variables needed in config.status (file generation) which aren't already
916 # passed by autoconf.