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=$CFLAGS_hold])
377 if test "$libgo_cv_c_split_stack_supported" = yes; then
378 SPLIT_STACK=-fsplit-stack
379 AC_DEFINE(USING_SPLIT_STACK, 1,
380 [Define if the compiler supports -fsplit-stack])
384 AC_SUBST(SPLIT_STACK)
385 AM_CONDITIONAL(USING_SPLIT_STACK,
386 test "$libgo_cv_c_split_stack_supported" = yes)
388 dnl Check whether the linker does stack munging when calling from
389 dnl split-stack into non-split-stack code. We check this by looking
390 dnl at the --help output. FIXME: This is only half right: it's
391 dnl possible for the linker to support this for some targets but not
393 AC_CACHE_CHECK([whether linker supports split stack],
394 [libgo_cv_c_linker_supports_split_stack],
395 [libgo_cv_c_linker_supports_split_stack=no
396 if $GOC -Wl,--help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
397 libgo_cv_c_linker_supports_split_stack=yes
399 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
400 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
401 [Define if the linker support split stack adjustments])
404 AC_CACHE_CHECK([whether compiler is llgo],
405 [libgo_cv_c_goc_is_llgo],
406 [libgo_cv_c_goc_is_llgo=no
407 if $GOC -dumpversion 2>/dev/null | grep llgo >/dev/null 2>&1; then
408 libgo_cv_c_goc_is_llgo=yes
410 AM_CONDITIONAL(GOC_IS_LLGO, test "$libgo_cv_c_goc_is_llgo" = yes)
412 dnl Test for the -lm library.
414 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
417 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
418 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
419 [libgo_cv_lib_sockets=
421 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
422 if test "$libgo_check_socket" = "yes"; then
423 unset ac_cv_func_connect
424 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
425 libgo_check_both=yes)
427 if test "$libgo_check_both" = "yes"; then
429 LIBS="$LIBS -lsocket -lnsl"
430 unset ac_cv_func_accept
431 AC_CHECK_FUNC(accept,
433 libgo_cv_lib_sockets="-lsocket -lnsl"])
434 unset ac_cv_func_accept
437 unset ac_cv_func_gethostbyname
438 libgo_old_libs="$LIBS"
439 AC_CHECK_FUNC(gethostbyname, ,
440 [AC_CHECK_LIB(nsl, main,
441 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
442 unset ac_cv_func_gethostbyname
445 NET_LIBS="$libgo_cv_lib_sockets"
448 dnl Test whether the compiler supports the -pthread option.
449 AC_CACHE_CHECK([whether -pthread is supported],
450 [libgo_cv_lib_pthread],
452 CFLAGS="$CFLAGS -pthread"
453 AC_COMPILE_IFELSE([[int i;]],
454 [libgo_cv_lib_pthread=yes],
455 [libgo_cv_lib_pthread=no])
456 CFLAGS=$CFLAGS_hold])
458 if test "$libgo_cv_lib_pthread" = yes; then
459 PTHREAD_CFLAGS=-pthread
461 AC_SUBST(PTHREAD_CFLAGS)
463 dnl Test for the -lpthread library.
465 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
466 AC_SUBST(PTHREAD_LIBS)
468 dnl Test if -lrt is required for sched_yield and/or nanosleep.
469 AC_SEARCH_LIBS([sched_yield], [rt])
470 AC_SEARCH_LIBS([nanosleep], [rt])
474 GCC_CHECK_UNWIND_GETIPINFO
476 AC_ARG_ENABLE(sjlj-exceptions,
477 AC_HELP_STRING([--enable-sjlj-exceptions],
478 [force use of builtin_setjmp for exceptions]),
479 [case "$enableval" in
481 *) AC_MSG_ERROR([unknown argument to --enable-sjlj-exceptions]) ;;
483 [enable_sjlj_exceptions=auto])
485 AC_CACHE_CHECK([whether to use setjmp/longjmp exceptions],
486 [libgo_cv_lib_sjlj_exceptions],
493 int i __attribute__ ((cleanup (clean)));
498 CFLAGS="--save-temps -fexceptions"
499 libgo_cv_lib_sjlj_exceptions=unknown
500 AS_IF([ac_fn_c_try_compile],
501 [if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1; then
502 libgo_cv_lib_sjlj_exceptions=yes
503 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1; then
504 libgo_cv_lib_sjlj_exceptions=no
510 if test "$enable_sjlj_exceptions" = "auto"; then
511 enable_sjlj_exceptions=$libgo_cv_lib_sjlj_exceptions
514 case $enable_sjlj_exceptions in
516 AC_DEFINE(LIBGO_SJLJ_EXCEPTIONS, 1,
517 [Define if the C++ compiler is configured for setjmp/longjmp exceptions.])
522 AC_MSG_ERROR([unable to detect exception model])
526 AC_CHECK_HEADERS(sched.h sys/file.h sys/mman.h syscall.h sys/epoll.h sys/inotify.h sys/ptrace.h sys/syscall.h sys/user.h sys/utsname.h sys/select.h sys/socket.h net/if.h net/if_arp.h net/route.h netpacket/packet.h sys/prctl.h sys/mount.h sys/vfs.h sys/statfs.h sys/timex.h sys/sysinfo.h utime.h linux/ether.h linux/fs.h linux/reboot.h netinet/icmp6.h netinet/in_syst.h netinet/ip.h netinet/ip_mroute.h netinet/if_ether.h)
528 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
529 [#ifdef HAVE_SYS_SOCKET_H
530 #include <sys/socket.h>
534 AC_CACHE_CHECK([whether <ustat.h> can be used],
535 [libgo_cv_c_ustat_h],
537 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE $OSCFLAGS"
540 #include <sys/types.h>
541 #ifdef HAVE_LINUX_FILTER_H
542 #include <linux/filter.h>
545 ])], [libgo_cv_c_ustat_h=yes], [libgo_cv_c_ustat_h=no])
546 CFLAGS=$CFLAGS_hold])
547 if test $libgo_cv_c_ustat_h = yes; then
548 AC_DEFINE(HAVE_USTAT_H, 1,
549 [Define to 1 if you have the <ustat.h> header file and it works.])
552 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
554 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv unsetenv dl_iterate_phdr)
555 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
556 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
558 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)
560 AC_CHECK_TYPES([loff_t])
564 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
567 CFLAGS_hold="$CFLAGS"
568 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
570 LIBS="$LIBS $PTHREAD_LIBS"
571 AC_CHECK_FUNCS(sem_timedwait)
572 CFLAGS="$CFLAGS_hold"
576 LIBS="$LIBS $MATH_LIBS"
577 AC_CHECK_FUNCS(matherr)
580 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4],
581 [libgo_cv_func___sync_bool_compare_and_swap_4],
583 typedef unsigned int uint32 __attribute__ ((mode (SI)));
585 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
587 [libgo_cv_func___sync_bool_compare_and_swap_4=yes],
588 [libgo_cv_func___sync_bool_compare_and_swap_4=no])])
589 if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then
590 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1,
591 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32])
594 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_8],
595 [libgo_cv_func___sync_bool_compare_and_swap_8],
597 typedef unsigned int uint64 __attribute__ ((mode (DI)));
599 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
601 [libgo_cv_func___sync_bool_compare_and_swap_8=yes],
602 [libgo_cv_func___sync_bool_compare_and_swap_8=no])])
603 if test "$libgo_cv_func___sync_bool_compare_and_swap_8" = "yes"; then
604 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_8, 1,
605 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint64])
608 AC_CACHE_CHECK([for __sync_fetch_and_add_4],
609 [libgo_cv_func___sync_fetch_and_add_4],
611 typedef unsigned int uint32 __attribute__ ((mode (SI)));
613 int main() { return __sync_fetch_and_add (&i, 1); }
615 [libgo_cv_func___sync_fetch_and_add_4=yes],
616 [libgo_cv_func___sync_fetch_and_add_4=no])])
617 if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then
618 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1,
619 [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32])
622 AC_CACHE_CHECK([for __sync_add_and_fetch_8],
623 [libgo_cv_func___sync_add_and_fetch_8],
625 typedef unsigned int uint64 __attribute__ ((mode (DI)));
627 int main() { return __sync_add_and_fetch (&i, 1); }
629 [libgo_cv_func___sync_add_and_fetch_8=yes],
630 [libgo_cv_func___sync_add_and_fetch_8=no])])
631 if test "$libgo_cv_func___sync_add_and_fetch_8" = "yes"; then
632 AC_DEFINE(HAVE_SYNC_ADD_AND_FETCH_8, 1,
633 [Define to 1 if the compiler provides the __sync_add_and_fetch function for uint64])
636 dnl For x86 we want to use the -minline-all-stringops option to avoid
637 dnl forcing a stack split when calling memcpy and friends.
638 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
639 [libgo_cv_c_stringops],
641 CFLAGS="$CFLAGS -minline-all-stringops"
642 AC_COMPILE_IFELSE([int i;],
643 [libgo_cv_c_stringops=yes],
644 [libgo_cv_c_stringops=no])
645 CFLAGS=$CFLAGS_hold])
647 if test "$libgo_cv_c_stringops" = yes; then
648 STRINGOPS_FLAG=-minline-all-stringops
650 AC_SUBST(STRINGOPS_FLAG)
652 dnl For x86 we want to compile the math library with -mfancy-math-387
653 dnl -funsafe-math-optimizations so that we can use the builtin
654 dnl instructions directly.
655 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
656 [libgo_cv_c_fancymath],
658 CFLAGS="$CFLAGS -mfancy-math-387"
659 AC_COMPILE_IFELSE([int i;],
660 [libgo_cv_c_fancymath=yes],
661 [libgo_cv_c_fancymath=no])
662 CFLAGS=$CFLAGS_hold])
664 if test "$libgo_cv_c_fancymath" = yes; then
665 MATH_FLAG="-mfancy-math-387 -funsafe-math-optimizations"
667 MATH_FLAG="-ffp-contract=off"
672 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
673 AC_CHECK_TYPES([off64_t])
676 dnl Work out the size of the epoll_events struct on GNU/Linux.
677 AC_CACHE_CHECK([epoll_event size],
678 [libgo_cv_c_epoll_event_size],
679 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
680 [sizeof (struct epoll_event)],
681 [#include <sys/epoll.h>],
682 [libgo_cv_c_epoll_event_size=0])])
683 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
684 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
686 dnl Work out the offset of the fd field in the epoll_events struct on
688 AC_CACHE_CHECK([epoll_event data.fd offset],
689 [libgo_cv_c_epoll_event_fd_offset],
690 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
691 [offsetof (struct epoll_event, data.fd)],
693 #include <sys/epoll.h>],
694 [libgo_cv_c_epoll_event_fd_offset=0])])
695 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
696 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
698 dnl See if struct exception is defined in <math.h>.
699 AC_CHECK_TYPE([struct exception],
700 [libgo_has_struct_exception=yes],
701 [libgo_has_struct_exception=no],
703 if test "$libgo_has_struct_exception" = "yes"; then
704 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
705 [Define to 1 if <math.h> defines struct exception])
708 dnl See whether setcontext changes the value of TLS variables.
709 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
710 [libgo_cv_lib_setcontext_clobbers_tls],
711 [CFLAGS_hold="$CFLAGS"
712 CFLAGS="$PTHREAD_CFLAGS"
714 LIBS="$LIBS $PTHREAD_LIBS"
715 AC_CHECK_SIZEOF([void *])
716 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
721 #include <ucontext.h>
726 static char stack[[10 * 1024 * 1024]];
729 /* Called via makecontext/setcontext. */
737 /* Called via pthread_create. */
742 /* The thread should still see this value after calling
748 /* The call to setcontext should not return. */
757 /* The thread should not see this value. */
760 if (getcontext (&c) < 0)
763 c.uc_stack.ss_sp = stack;
764 #ifdef MAKECONTEXT_STACK_TOP
765 c.uc_stack.ss_sp += sizeof stack;
767 c.uc_stack.ss_flags = 0;
768 c.uc_stack.ss_size = sizeof stack;
770 makecontext (&c, cfn, 0);
772 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
775 if (pthread_join (tid, NULL) != 0)
778 /* The thread should have called exit. */
782 [libgo_cv_lib_setcontext_clobbers_tls=no],
783 [libgo_cv_lib_setcontext_clobbers_tls=yes],
784 [case "$target:$ptr_type_size" in
785 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
786 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
788 libgo_cv_lib_setcontext_clobbers_tls=no ;;
791 CFLAGS="$CFLAGS_hold"
794 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
795 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
796 [Define if setcontext clobbers TLS variables])
799 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
800 libgo_cv_ro_eh_frame, [
801 libgo_cv_ro_eh_frame=no
802 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
803 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
804 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
805 libgo_cv_ro_eh_frame=yes
806 elif grep '.section.*eh_frame.*#alloc' conftest.c \
807 | grep -v '#write' > /dev/null; then
808 libgo_cv_ro_eh_frame=yes
813 if test "x$libgo_cv_ro_eh_frame" = xyes; then
814 AC_DEFINE(EH_FRAME_FLAGS, "a",
815 [Define to the flags needed for the .section .eh_frame directive.])
817 AC_DEFINE(EH_FRAME_FLAGS, "aw",
818 [Define to the flags needed for the .section .eh_frame directive.])
821 AC_CACHE_CHECK([if compiler supports -Qunused-arguments],
822 [libgo_cv_c_unused_arguments],
824 CFLAGS="$CFLAGS -Qunused-arguments"
825 AC_COMPILE_IFELSE([[int i;]],
826 [libgo_cv_c_unused_arguments=yes],
827 [libgo_cv_c_unused_arguments=no])
828 CFLAGS=$CFLAGS_hold])
830 AC_CACHE_CHECK([if assembler supports GNU comdat group syntax],
831 libgo_cv_as_comdat_gnu, [
832 echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s
834 if test "$libgo_cv_c_unused_arguments" = yes; then
835 CFLAGS="$CFLAGS -Qunused-arguments"
837 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
838 libgo_cv_as_comdat_gnu=yes
840 libgo_cv_as_comdat_gnu=no
844 if test "x$libgo_cv_as_comdat_gnu" = xyes; then
845 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1,
846 [Define if your assembler supports GNU comdat group syntax.])
849 AC_CACHE_CHECK([assembler supports pc related relocs],
850 libgo_cv_as_x86_pcrel, [
851 libgo_cv_as_x86_pcrel=yes
852 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
854 if test "$libgo_cv_c_unused_arguments" = yes; then
855 CFLAGS="$CFLAGS -Qunused-arguments"
857 if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
858 libgo_cv_as_x86_pcrel=no
862 if test "x$libgo_cv_as_x86_pcrel" = xyes; then
863 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
864 [Define if your assembler supports PC relative relocs.])
867 AC_CACHE_CHECK([assembler supports unwind section type],
868 libgo_cv_as_x86_64_unwind_section_type, [
869 libgo_cv_as_x86_64_unwind_section_type=yes
870 echo '.section .eh_frame,"a",@unwind' > conftest.s
872 if test "$libgo_cv_c_unused_arguments" = yes; then
873 CFLAGS="$CFLAGS -Qunused-arguments"
875 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
876 libgo_cv_as_x86_64_unwind_section_type=no
880 if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then
881 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
882 [Define if your assembler supports unwind section type.])
887 if test ${multilib} = yes; then
888 multilib_arg="--enable-multilib"
893 AC_CONFIG_FILES(Makefile testsuite/Makefile)
895 AC_CONFIG_COMMANDS([default],
896 [if test -n "$CONFIG_FILES"; then
897 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
898 # that multilib installs will end up installed in the correct place.
899 # The testsuite needs it for multilib-aware ABI baseline files.
900 # To work around this not being passed down from config-ml.in ->
901 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
902 # append it here. Only modify Makefiles that have just been created.
904 # Also, get rid of this simulated-VPATH thing that automake does.
906 s!`test -f '$<' || echo '$(srcdir)/'`!!
908 for i in $SUBDIRS; do
909 case $CONFIG_FILES in
911 #echo "Adding MULTISUBDIR to $i/Makefile"
912 sed -f vpsed $i/Makefile > tmp
913 grep '^MULTISUBDIR =' Makefile >> tmp
922 # Variables needed in config.status (file generation) which aren't already
923 # passed by autoconf.