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=13:0:0
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])
36 # static hash tables crashes on AIX when libgo is built with O2
37 CFLAGS="$CFLAGS -fno-section-anchors"
38 GOCFLAGS="$GOCFLAGS -fno-section-anchors"
46 AC_CHECK_TOOL(OBJCOPY, objcopy, missing-objcopy)
50 AC_SUBST(enable_shared)
51 AC_SUBST(enable_static)
53 CC_FOR_BUILD=${CC_FOR_BUILD:-gcc}
54 AC_SUBST(CC_FOR_BUILD)
58 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
61 AC_ARG_ENABLE(werror, [AS_HELP_STRING([--enable-werror],
62 [turns on -Werror @<:@default=yes@:>@])])
63 if test "x$enable_werror" != "xno"; then
69 glibgo_toolexeclibdir=no
71 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
72 AC_ARG_ENABLE([version-specific-runtime-libs],
73 AC_HELP_STRING([--enable-version-specific-runtime-libs],
74 [Specify that runtime libraries should be installed in a compiler-specific directory]),
76 yes) version_specific_libs=yes ;;
77 no) version_specific_libs=no ;;
78 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
80 [version_specific_libs=no])
81 AC_MSG_RESULT($version_specific_libs)
83 # Version-specific runtime libs processing.
84 if test $version_specific_libs = yes; then
85 glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
86 glibgo_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
89 # Calculate glibgo_toolexecdir, glibgo_toolexeclibdir
90 # Install a library built with a cross compiler in tooldir, not libdir.
91 if test -n "$with_cross_host" &&
92 test x"$with_cross_host" != x"no"; then
93 nover_glibgo_toolexecdir='${exec_prefix}/${host_alias}'
94 nover_glibgo_toolexeclibdir='${toolexecdir}/lib'
96 nover_glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
97 nover_glibgo_toolexeclibdir='${libdir}'
99 multi_os_directory=`$GOC -print-multi-os-directory`
100 case $multi_os_directory in
101 .) ;; # Avoid trailing /.
102 *) nover_glibgo_toolexeclibdir=${nover_glibgo_toolexeclibdir}/${multi_os_directory} ;;
105 if test x"$glibgo_toolexecdir" = x"no"; then
106 glibgo_toolexecdir="${nover_glibgo_toolexecdir}"
107 glibgo_toolexeclibdir="${nover_glibgo_toolexeclibdir}"
110 AC_SUBST(glibgo_toolexecdir)
111 AC_SUBST(glibgo_toolexeclibdir)
112 AC_SUBST(nover_glibgo_toolexeclibdir)
114 # See if the user wants to configure without libffi. Some
115 # architectures don't support it. FIXME: We should set a default
118 AS_HELP_STRING([--without-libffi],
121 [with_libffi=${with_libffi_default-yes}])
125 if test "$with_libffi" != no; then
126 AC_DEFINE(USE_LIBFFI, 1, [Define if we're to use libffi.])
127 LIBFFI=../libffi/libffi_convenience.la
128 LIBFFIINCS='-I$(top_srcdir)/../libffi/include -I../libffi/include'
132 AM_CONDITIONAL(USE_LIBFFI, test "$with_liffi" != "no")
134 # See if the user wants to configure without libatomic. This is useful if we are
135 # on an architecture for which libgo does not need an atomic support library and
136 # libatomic does not support our C compiler.
137 AC_ARG_WITH(libatomic,
138 AS_HELP_STRING([--without-libatomic],
139 [don't use libatomic]),
141 [with_libatomic=${with_libatomic_default-yes}])
144 if test "$with_libatomic" != no; then
145 LIBATOMIC=../libatomic/libatomic_convenience.la
149 # Used to tell GNU make to include a file without telling automake to
151 go_include="-include"
154 # All known GOOS values. This is the union of all operating systems
155 # supported by the gofrontend and all operating systems supported by
157 ALLGOOS="aix android darwin dragonfly freebsd irix linux netbsd openbsd plan9 rtems solaris windows"
171 *-*-darwin*) is_darwin=yes; GOOS=darwin ;;
172 *-*-freebsd*) is_freebsd=yes; GOOS=freebsd ;;
173 *-*-irix6*) is_irix=yes; GOOS=irix ;;
174 *-*-linux*) is_linux=yes; GOOS=linux ;;
175 *-*-netbsd*) is_netbsd=yes; GOOS=netbsd ;;
176 *-*-openbsd*) is_openbsd=yes; GOOS=openbsd ;;
177 *-*-dragonfly*) is_dragonfly=yes; GOOS=dragonfly ;;
178 *-*-rtems*) is_rtems=yes; GOOS=rtems ;;
179 *-*-solaris2*) is_solaris=yes; GOOS=solaris ;;
180 *-*-aix*) is_aix=yes; GOOS=aix ;;
182 AM_CONDITIONAL(LIBGO_IS_DARWIN, test $is_darwin = yes)
183 AM_CONDITIONAL(LIBGO_IS_FREEBSD, test $is_freebsd = yes)
184 AM_CONDITIONAL(LIBGO_IS_IRIX, test $is_irix = yes)
185 AM_CONDITIONAL(LIBGO_IS_LINUX, test $is_linux = yes)
186 AM_CONDITIONAL(LIBGO_IS_NETBSD, test $is_netbsd = yes)
187 AM_CONDITIONAL(LIBGO_IS_OPENBSD, test $is_openbsd = yes)
188 AM_CONDITIONAL(LIBGO_IS_DRAGONFLY, test $is_dragonfly = yes)
189 AM_CONDITIONAL(LIBGO_IS_RTEMS, test $is_rtems = yes)
190 AM_CONDITIONAL(LIBGO_IS_SOLARIS, test $is_solaris = yes)
191 AM_CONDITIONAL(LIBGO_IS_AIX, test $is_aix = yes)
192 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)
196 dnl Test whether we need to use DejaGNU or whether we can use the
197 dnl simpler gotest approach. We can only use gotest for a native
201 *-*-rtems*) USE_DEJAGNU=yes ;;
203 *) USE_DEJAGNU=yes ;;
205 AC_SUBST(USE_DEJAGNU)
207 # All known GOARCH values. This is the union of all architectures
208 # supported by the gofrontend and all architectures supported by the
210 # To add a new architecture:
211 # - add it to this list
212 # - if appropriate, add an entry to ALLGOARCHFAMILY below
213 # - add an entry to the case on ${host} below to set GOARCH
214 # - update goarchList in libgo/go/go/build/syslist.go
215 # - update goarch.sh to report the values for this architecture
216 # - update go-set-goarch in gcc/testsuite/go.test/go-test.exp
217 # - update ptrSizeMap and intSizeMap in libgo/go/cmd/cgo/main.go
218 # - update arch lists in libgo/match.sh
219 # - update arch lists in libgo/testsuite/gotest
220 # - update +build lines in several places
221 # - libgo/go/runtime/lfstack_NNbit.go
222 # - libgo/go/runtime/hashNN.go
223 # - libgo/go/runtime/unalignedN.go
224 # - libgo/go/syscall/endian_XX.go
226 # - possibly update files in libgo/go/internal/syscall/unix
227 ALLGOARCH="386 alpha amd64 amd64p32 arm armbe arm64 arm64be ia64 m68k mips mipsle mips64 mips64le mips64p32 mips64p32le ppc ppc64 ppc64le s390 s390x sh shbe sparc sparc64"
229 # All known GOARCH family values.
230 ALLGOARCHFAMILY="I386 ALPHA AMD64 ARM ARM64 IA64 M68K MIPS MIPS64 PPC PPC64 S390 S390X SH SPARC SPARC64"
240 arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
249 i[34567]86-*-* | x86_64-*-*)
266 #if _MIPS_SIM != _ABIO32
271 #if _MIPS_SIM != _ABIN32
276 #if _MIPS_SIM != _ABI64
280 [AC_MSG_ERROR([unknown MIPS ABI])
281 [mips_abi="n32"]])])])
283 "o32") GOARCH=mips ;;
284 "n32") GOARCH=mips64p32 ;;
285 "n64") GOARCH=mips64 ;;
293 rs6000*-*-* | powerpc*-*-*)
301 #if defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN__)
309 #if defined(__s390x__)
315 sh3eb*-*-* | sh4eb*-*-*)
323 #if defined(__sparcv9) || defined(__arch64__)
332 AC_SUBST(ALLGOARCHFAMILY)
334 dnl Some files are only present when needed for specific architectures.
336 GO_LIBCALL_OS_ARCH_FILE=
338 GO_SYSCALL_OS_ARCH_FILE=
339 if test -f "${srcdir}/go/syscall/libcall_${GOOS}.go"; then
340 GO_LIBCALL_OS_FILE="go/syscall/libcall_${GOOS}.go"
342 if test -f "${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go"; then
343 GO_LIBCALL_OS_ARCH_FILE="go/syscall/libcall_${GOOS}_${GOARCH}.go"
345 if test -f "${srcdir}/go/syscall/syscall_${GOOS}.go"; then
346 GO_SYSCALL_OS_FILE="go/syscall/syscall_${GOOS}.go"
348 if test -f "${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go"; then
349 GO_SYSCALL_OS_ARCH_FILE="go/syscall/syscall_${GOOS}_${GOARCH}.go"
351 AC_SUBST(GO_LIBCALL_OS_FILE)
352 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
353 AC_SUBST(GO_SYSCALL_OS_FILE)
354 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
356 dnl Special flags used to generate sysinfo.go.
357 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
360 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
361 # msghdr in <sys/socket.h>.
362 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
364 *-*-solaris2.1[[01]])
365 # Solaris 10+ needs this so struct msghdr gets the msg_control
366 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
367 # above doesn't work with C99.
368 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
373 dnl Check if assembler supports disabling hardware capability support.
374 GCC_CHECK_ASSEMBLER_HWCAP
376 dnl Use -fsplit-stack when compiling C code if available.
377 AC_CACHE_CHECK([whether -fsplit-stack is supported],
378 [libgo_cv_c_split_stack_supported],
380 CFLAGS="$CFLAGS -fsplit-stack"
381 AC_COMPILE_IFELSE([[int i;]],
382 [libgo_cv_c_split_stack_supported=yes],
383 [libgo_cv_c_split_stack_supported=no])
384 CFLAGS=$CFLAGS_hold])
386 dnl Make sure the linker permits -fsplit-stack. Old versions of gold will
387 dnl reject split-stack code calling non-split-stack code on targets
388 dnl they don't support.
389 AC_CACHE_CHECK([whether linker supports split/non-split linked together],
390 [libgo_cv_c_linker_split_non_split],
391 [cat > conftest1.c << EOF
393 int main() { f(); return 0; }
395 cat > conftest2.c << EOF
398 $CC -c -fsplit-stack $CFLAGS $CPPFLAGS conftest1.c >/dev/null 2>&1
399 $CC -c $CFLAGS $CPPFLAGS conftest2.c > /dev/null 2>&1
400 if $CC -o conftest conftest1.$ac_objext conftest2.$ac_objext > /dev/null 2>&1; then
401 libgo_cv_c_linker_split_non_split=yes
403 libgo_cv_c_linker_split_non_split=no
405 rm -f conftest1.* conftest2.* conftest])
407 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes; then
408 SPLIT_STACK=-fsplit-stack
409 AC_DEFINE(USING_SPLIT_STACK, 1,
410 [Define if the compiler supports -fsplit-stack])
414 AC_SUBST(SPLIT_STACK)
415 AM_CONDITIONAL(USING_SPLIT_STACK,
416 test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes)
418 dnl If the compiler supports split-stack but the linker does not, then
419 dnl we need to explicitly disable split-stack for Go.
420 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = no; then
421 GO_SPLIT_STACK=-fno-split-stack
425 AC_SUBST(GO_SPLIT_STACK)
427 dnl Check whether the linker does stack munging when calling from
428 dnl split-stack into non-split-stack code. We check this by looking
429 dnl at the --help output. FIXME: This is only half right: it's
430 dnl possible for the linker to support this for some targets but not
432 dnl This is slightly different from the above check, which is whether
433 dnl the linker permits the call at all.
434 AC_CACHE_CHECK([whether linker supports split stack],
435 [libgo_cv_c_linker_supports_split_stack],
436 [libgo_cv_c_linker_supports_split_stack=no
437 if $GOC -Wl,--help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
438 libgo_cv_c_linker_supports_split_stack=yes
440 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
441 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
442 [Define if the linker support split stack adjustments])
445 AC_CACHE_CHECK([whether compiler is llgo],
446 [libgo_cv_c_goc_is_llgo],
447 [libgo_cv_c_goc_is_llgo=no
448 if $GOC -dumpversion 2>/dev/null | grep llgo >/dev/null 2>&1; then
449 libgo_cv_c_goc_is_llgo=yes
451 AM_CONDITIONAL(GOC_IS_LLGO, test "$libgo_cv_c_goc_is_llgo" = yes)
453 dnl Test for the -lm library.
455 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
458 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
459 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
460 [libgo_cv_lib_sockets=
462 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
463 if test "$libgo_check_socket" = "yes"; then
464 unset ac_cv_func_connect
465 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
466 libgo_check_both=yes)
468 if test "$libgo_check_both" = "yes"; then
470 LIBS="$LIBS -lsocket -lnsl"
471 unset ac_cv_func_accept
472 AC_CHECK_FUNC(accept,
474 libgo_cv_lib_sockets="-lsocket -lnsl"])
475 unset ac_cv_func_accept
478 unset ac_cv_func_gethostbyname
479 libgo_old_libs="$LIBS"
480 AC_CHECK_FUNC(gethostbyname, ,
481 [AC_CHECK_LIB(nsl, main,
482 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
483 unset ac_cv_func_gethostbyname
484 AC_CHECK_FUNC(sendfile, ,
485 [AC_CHECK_LIB(sendfile, main,
486 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lsendfile"])])
489 NET_LIBS="$libgo_cv_lib_sockets"
492 dnl Test whether the compiler supports the -pthread option.
493 AC_CACHE_CHECK([whether -pthread is supported],
494 [libgo_cv_lib_pthread],
496 CFLAGS="$CFLAGS -pthread"
497 AC_COMPILE_IFELSE([[int i;]],
498 [libgo_cv_lib_pthread=yes],
499 [libgo_cv_lib_pthread=no])
500 CFLAGS=$CFLAGS_hold])
502 if test "$libgo_cv_lib_pthread" = yes; then
503 PTHREAD_CFLAGS=-pthread
505 AC_SUBST(PTHREAD_CFLAGS)
507 dnl Test for the -lpthread library.
509 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
510 AC_SUBST(PTHREAD_LIBS)
512 dnl Test if -lrt is required for sched_yield or nanosleep or clock_gettime.
513 AC_SEARCH_LIBS([sched_yield], [rt])
514 AC_SEARCH_LIBS([nanosleep], [rt])
515 AC_SEARCH_LIBS([clock_gettime], [rt])
519 GCC_CHECK_UNWIND_GETIPINFO
521 AC_CHECK_HEADERS(port.h sched.h semaphore.h sys/file.h sys/mman.h syscall.h sys/epoll.h sys/event.h sys/inotify.h sys/ptrace.h sys/syscall.h sys/user.h sys/utsname.h sys/select.h sys/socket.h net/if.h net/if_arp.h net/route.h netpacket/packet.h sys/prctl.h sys/mount.h sys/vfs.h sys/statfs.h sys/timex.h sys/sysinfo.h utime.h linux/ether.h linux/fs.h linux/ptrace.h linux/reboot.h netinet/in_syst.h netinet/ip.h netinet/ip_mroute.h netinet/if_ether.h)
523 AC_CHECK_HEADERS([netinet/icmp6.h], [], [],
524 [#include <netinet/in.h>
527 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
528 [#ifdef HAVE_SYS_SOCKET_H
529 #include <sys/socket.h>
533 AC_CACHE_CHECK([whether <ustat.h> can be used],
534 [libgo_cv_c_ustat_h],
536 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE $OSCFLAGS"
539 #include <sys/types.h>
540 #ifdef HAVE_LINUX_FILTER_H
541 #include <linux/filter.h>
544 ])], [libgo_cv_c_ustat_h=yes], [libgo_cv_c_ustat_h=no])
545 CFLAGS=$CFLAGS_hold])
546 if test $libgo_cv_c_ustat_h = yes; then
547 AC_DEFINE(HAVE_USTAT_H, 1,
548 [Define to 1 if you have the <ustat.h> header file and it works.])
551 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
553 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv unsetenv dl_iterate_phdr)
554 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
555 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
557 AC_CHECK_FUNCS(accept4 dup3 epoll_create1 faccessat fallocate fchmodat fchownat futimesat getxattr inotify_add_watch inotify_init inotify_init1 inotify_rm_watch listxattr mkdirat mknodat open64 openat pipe2 removexattr renameat setxattr sync_file_range splice syscall tee unlinkat unshare utimensat)
559 AC_CHECK_TYPES([loff_t])
563 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
566 CFLAGS_hold="$CFLAGS"
567 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
569 LIBS="$LIBS $PTHREAD_LIBS"
570 AC_CHECK_FUNCS(sem_timedwait)
571 CFLAGS="$CFLAGS_hold"
575 LIBS="$LIBS $MATH_LIBS"
576 AC_CHECK_FUNCS(matherr)
579 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4],
580 [libgo_cv_func___sync_bool_compare_and_swap_4],
582 typedef unsigned int uint32 __attribute__ ((mode (SI)));
584 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
586 [libgo_cv_func___sync_bool_compare_and_swap_4=yes],
587 [libgo_cv_func___sync_bool_compare_and_swap_4=no])])
588 if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then
589 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1,
590 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32])
593 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_8],
594 [libgo_cv_func___sync_bool_compare_and_swap_8],
596 typedef unsigned int uint64 __attribute__ ((mode (DI)));
598 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
600 [libgo_cv_func___sync_bool_compare_and_swap_8=yes],
601 [libgo_cv_func___sync_bool_compare_and_swap_8=no])])
602 if test "$libgo_cv_func___sync_bool_compare_and_swap_8" = "yes"; then
603 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_8, 1,
604 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint64])
607 AC_CACHE_CHECK([for __sync_fetch_and_add_4],
608 [libgo_cv_func___sync_fetch_and_add_4],
610 typedef unsigned int uint32 __attribute__ ((mode (SI)));
612 int main() { return __sync_fetch_and_add (&i, 1); }
614 [libgo_cv_func___sync_fetch_and_add_4=yes],
615 [libgo_cv_func___sync_fetch_and_add_4=no])])
616 if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then
617 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1,
618 [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32])
621 AC_CACHE_CHECK([for __sync_add_and_fetch_8],
622 [libgo_cv_func___sync_add_and_fetch_8],
624 typedef unsigned int uint64 __attribute__ ((mode (DI)));
626 int main() { return __sync_add_and_fetch (&i, 1); }
628 [libgo_cv_func___sync_add_and_fetch_8=yes],
629 [libgo_cv_func___sync_add_and_fetch_8=no])])
630 if test "$libgo_cv_func___sync_add_and_fetch_8" = "yes"; then
631 AC_DEFINE(HAVE_SYNC_ADD_AND_FETCH_8, 1,
632 [Define to 1 if the compiler provides the __sync_add_and_fetch function for uint64])
635 dnl For x86 we want to use the -minline-all-stringops option to avoid
636 dnl forcing a stack split when calling memcpy and friends.
637 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
638 [libgo_cv_c_stringops],
640 CFLAGS="$CFLAGS -minline-all-stringops"
641 AC_COMPILE_IFELSE([int i;],
642 [libgo_cv_c_stringops=yes],
643 [libgo_cv_c_stringops=no])
644 CFLAGS=$CFLAGS_hold])
646 if test "$libgo_cv_c_stringops" = yes; then
647 STRINGOPS_FLAG=-minline-all-stringops
649 AC_SUBST(STRINGOPS_FLAG)
651 dnl For x86 we want to compile the math library with -mfancy-math-387
652 dnl -funsafe-math-optimizations so that we can use the builtin
653 dnl instructions directly.
654 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
655 [libgo_cv_c_fancymath],
657 CFLAGS="$CFLAGS -mfancy-math-387"
658 AC_COMPILE_IFELSE([int i;],
659 [libgo_cv_c_fancymath=yes],
660 [libgo_cv_c_fancymath=no])
661 CFLAGS=$CFLAGS_hold])
663 if test "$libgo_cv_c_fancymath" = yes; then
664 MATH_FLAG="-mfancy-math-387 -funsafe-math-optimizations -fno-math-errno"
666 MATH_FLAG="-ffp-contract=off"
671 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
672 AC_CHECK_TYPES([off64_t])
675 dnl Work out the size of the epoll_events struct on GNU/Linux.
676 AC_CACHE_CHECK([epoll_event size],
677 [libgo_cv_c_epoll_event_size],
678 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
679 [sizeof (struct epoll_event)],
680 [#include <sys/epoll.h>],
681 [libgo_cv_c_epoll_event_size=0])])
682 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
683 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
685 dnl Work out the offset of the fd field in the epoll_events struct on
687 AC_CACHE_CHECK([epoll_event data.fd offset],
688 [libgo_cv_c_epoll_event_fd_offset],
689 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
690 [offsetof (struct epoll_event, data.fd)],
692 #include <sys/epoll.h>],
693 [libgo_cv_c_epoll_event_fd_offset=0])])
694 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
695 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
697 dnl Check if <sys/stat.h> uses timespec_t for st_?tim members. Introduced
698 dnl in Solaris 11.4 for XPG7 compatibility.
699 AC_EGREP_HEADER([timespec_t.*st_atim], [sys/stat.h],
700 [have_stat_timespec=yes], [have_stat_timespec=no])
701 AM_CONDITIONAL(HAVE_STAT_TIMESPEC, test $have_stat_timespec = yes)
703 dnl See if struct exception is defined in <math.h>.
704 AC_CHECK_TYPE([struct exception],
705 [libgo_has_struct_exception=yes],
706 [libgo_has_struct_exception=no],
708 if test "$libgo_has_struct_exception" = "yes"; then
709 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
710 [Define to 1 if <math.h> defines struct exception])
713 dnl See whether setcontext changes the value of TLS variables.
714 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
715 [libgo_cv_lib_setcontext_clobbers_tls],
716 [CFLAGS_hold="$CFLAGS"
717 CFLAGS="$PTHREAD_CFLAGS"
719 LIBS="$LIBS $PTHREAD_LIBS"
720 AC_CHECK_SIZEOF([void *])
721 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
726 #include <ucontext.h>
731 static char stack[[10 * 1024 * 1024]];
734 /* Called via makecontext/setcontext. */
742 /* Called via pthread_create. */
747 /* The thread should still see this value after calling
753 /* The call to setcontext should not return. */
762 /* The thread should not see this value. */
765 if (getcontext (&c) < 0)
768 c.uc_stack.ss_sp = stack;
769 #ifdef MAKECONTEXT_STACK_TOP
770 c.uc_stack.ss_sp += sizeof stack;
772 c.uc_stack.ss_flags = 0;
773 c.uc_stack.ss_size = sizeof stack;
775 makecontext (&c, cfn, 0);
777 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
780 if (pthread_join (tid, NULL) != 0)
783 /* The thread should have called exit. */
787 [libgo_cv_lib_setcontext_clobbers_tls=no],
788 [libgo_cv_lib_setcontext_clobbers_tls=yes],
789 [case "$target:$ptr_type_size" in
790 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
791 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
793 libgo_cv_lib_setcontext_clobbers_tls=no ;;
796 CFLAGS="$CFLAGS_hold"
799 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
800 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
801 [Define if setcontext clobbers TLS variables])
804 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
805 libgo_cv_ro_eh_frame, [
806 libgo_cv_ro_eh_frame=no
807 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
808 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
809 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
810 libgo_cv_ro_eh_frame=yes
811 elif grep '.section.*eh_frame.*#alloc' conftest.c \
812 | grep -v '#write' > /dev/null; then
813 libgo_cv_ro_eh_frame=yes
818 if test "x$libgo_cv_ro_eh_frame" = xyes; then
819 AC_DEFINE(EH_FRAME_FLAGS, "a",
820 [Define to the flags needed for the .section .eh_frame directive.])
822 AC_DEFINE(EH_FRAME_FLAGS, "aw",
823 [Define to the flags needed for the .section .eh_frame directive.])
826 AC_CACHE_CHECK([if compiler supports -Qunused-arguments],
827 [libgo_cv_c_unused_arguments],
829 CFLAGS="$CFLAGS -Qunused-arguments"
830 AC_COMPILE_IFELSE([[int i;]],
831 [libgo_cv_c_unused_arguments=yes],
832 [libgo_cv_c_unused_arguments=no])
833 CFLAGS=$CFLAGS_hold])
835 AC_CACHE_CHECK([if assembler supports GNU comdat group syntax],
836 libgo_cv_as_comdat_gnu, [
837 echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s
839 if test "$libgo_cv_c_unused_arguments" = yes; then
840 CFLAGS="$CFLAGS -Qunused-arguments"
842 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
843 libgo_cv_as_comdat_gnu=yes
845 libgo_cv_as_comdat_gnu=no
849 if test "x$libgo_cv_as_comdat_gnu" = xyes; then
850 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1,
851 [Define if your assembler supports GNU comdat group syntax.])
854 AC_CACHE_CHECK([assembler supports pc related relocs],
855 libgo_cv_as_x86_pcrel, [
856 libgo_cv_as_x86_pcrel=yes
857 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
859 if test "$libgo_cv_c_unused_arguments" = yes; then
860 CFLAGS="$CFLAGS -Qunused-arguments"
862 if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
863 libgo_cv_as_x86_pcrel=no
867 if test "x$libgo_cv_as_x86_pcrel" = xyes; then
868 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
869 [Define if your assembler supports PC relative relocs.])
872 AC_CACHE_CHECK([assembler supports unwind section type],
873 libgo_cv_as_x86_64_unwind_section_type, [
874 libgo_cv_as_x86_64_unwind_section_type=yes
875 echo '.section .eh_frame,"a",@unwind' > conftest.s
877 if test "$libgo_cv_c_unused_arguments" = yes; then
878 CFLAGS="$CFLAGS -Qunused-arguments"
880 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
881 libgo_cv_as_x86_64_unwind_section_type=no
885 if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then
886 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
887 [Define if your assembler supports unwind section type.])
890 AC_CACHE_CHECK([assembler supports AES instructions],
891 libgo_cv_as_x86_aes, [
892 libgo_cv_as_x86_aes=yes
893 echo 'aesenc %xmm0, %xmm1' > conftest.s
895 if test "$libgo_cv_c_unused_arguments" = yes; then
896 CFLAGS="$CFLAGS -Qunused-arguments"
898 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i error > /dev/null; then
899 libgo_cv_as_x86_aes=no
903 if test "x$libgo_cv_as_x86_aes" = xyes; then
904 AC_DEFINE(HAVE_AS_X86_AES, 1,
905 [Define if your assembler supports AES instructions.])
910 if test ${multilib} = yes; then
911 multilib_arg="--enable-multilib"
916 AC_CONFIG_FILES(Makefile testsuite/Makefile)
918 AC_CONFIG_COMMANDS([default],
919 [if test -n "$CONFIG_FILES"; then
920 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
921 # that multilib installs will end up installed in the correct place.
922 # The testsuite needs it for multilib-aware ABI baseline files.
923 # To work around this not being passed down from config-ml.in ->
924 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
925 # append it here. Only modify Makefiles that have just been created.
927 # Also, get rid of this simulated-VPATH thing that automake does.
929 s!`test -f '$<' || echo '$(srcdir)/'`!!
931 for i in $SUBDIRS; do
932 case $CONFIG_FILES in
934 #echo "Adding MULTISUBDIR to $i/Makefile"
935 sed -f vpsed $i/Makefile > tmp
936 grep '^MULTISUBDIR =' Makefile >> tmp
945 # Variables needed in config.status (file generation) which aren't already
946 # passed by autoconf.