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.
9 AC_INIT(package-unused, version-unused,, libgo)
10 AC_CONFIG_SRCDIR(Makefile.am)
11 AC_CONFIG_HEADER(config.h)
13 libtool_VERSION=22:0:0
14 AC_SUBST(libtool_VERSION)
16 AM_ENABLE_MULTILIB(, ..)
19 target_alias=${target_alias-$host_alias}
21 AM_INIT_AUTOMAKE([1.9.3 no-define foreign no-dist subdir-objects -Wall -Wno-portability -Wno-override])
22 AH_TEMPLATE(PACKAGE, [Name of package])
23 AH_TEMPLATE(VERSION, [Version number of package])
25 m4_rename([_AC_ARG_VAR_PRECIOUS],[glibgo_PRECIOUS])
26 m4_define([_AC_ARG_VAR_PRECIOUS],[])
30 m4_rename_force([glibgo_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
36 # Check default architecture for FAT library creation
37 if test -z "`$CC -x c -E /dev/null -g3 -o - | grep 64BIT`" ; then
42 AC_SUBST(AIX_EXTRA_ARCH)
50 AC_CHECK_TOOL(OBJCOPY, objcopy, missing-objcopy)
54 AC_SUBST(enable_shared)
55 AC_SUBST(enable_static)
57 CC_FOR_BUILD=${CC_FOR_BUILD:-gcc}
58 AC_SUBST(CC_FOR_BUILD)
62 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
65 AC_ARG_ENABLE([werror],
66 [AS_HELP_STRING([--disable-werror], [disable building with -Werror])])
67 AS_IF([test "x$enable_werror" != "xno" && test "x$GCC" = "xyes"],
72 glibgo_toolexeclibdir=no
74 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
75 AC_ARG_ENABLE([version-specific-runtime-libs],
76 AC_HELP_STRING([--enable-version-specific-runtime-libs],
77 [Specify that runtime libraries should be installed in a compiler-specific directory]),
79 yes) version_specific_libs=yes ;;
80 no) version_specific_libs=no ;;
81 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
83 [version_specific_libs=no])
84 AC_MSG_RESULT($version_specific_libs)
86 GCC_WITH_TOOLEXECLIBDIR
88 # Version-specific runtime libs processing.
89 if test $version_specific_libs = yes; then
90 glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
91 glibgo_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
94 # Calculate glibgo_toolexecdir, glibgo_toolexeclibdir
95 # Install a library built with a cross compiler in tooldir, not libdir.
96 if test -n "$with_cross_host" &&
97 test x"$with_cross_host" != x"no"; then
98 nover_glibgo_toolexecdir='${exec_prefix}/${host_alias}'
99 case ${with_toolexeclibdir} in
101 nover_glibgo_toolexeclibdir='${toolexecdir}/lib'
104 nover_glibgo_toolexeclibdir=${with_toolexeclibdir}
108 nover_glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
109 nover_glibgo_toolexeclibdir='${libdir}'
111 multi_os_directory=`$GOC -print-multi-os-directory`
112 case $multi_os_directory in
113 .) ;; # Avoid trailing /.
114 *) nover_glibgo_toolexeclibdir=${nover_glibgo_toolexeclibdir}/${multi_os_directory} ;;
117 if test x"$glibgo_toolexecdir" = x"no"; then
118 glibgo_toolexecdir="${nover_glibgo_toolexecdir}"
119 glibgo_toolexeclibdir="${nover_glibgo_toolexeclibdir}"
122 AC_SUBST(glibgo_toolexecdir)
123 AC_SUBST(glibgo_toolexeclibdir)
124 AC_SUBST(nover_glibgo_toolexeclibdir)
126 # See if the user wants to configure without libffi. Some
127 # architectures don't support it. FIXME: We should set a default
130 AS_HELP_STRING([--without-libffi],
133 [with_libffi=${with_libffi_default-yes}])
137 if test "$with_libffi" != no; then
138 AC_DEFINE(USE_LIBFFI, 1, [Define if we're to use libffi.])
139 LIBFFI=../libffi/libffi_convenience.la
140 LIBFFIINCS='-I$(top_srcdir)/../libffi/include -I../libffi/include'
144 AM_CONDITIONAL(USE_LIBFFI, test "$with_libffi" != "no")
146 # See if the user wants to configure without libatomic. This is useful if we are
147 # on an architecture for which libgo does not need an atomic support library and
148 # libatomic does not support our C compiler.
149 AC_ARG_WITH(libatomic,
150 AS_HELP_STRING([--without-libatomic],
151 [don't use libatomic]),
153 [with_libatomic=${with_libatomic_default-yes}])
156 if test "$with_libatomic" != no; then
157 LIBATOMIC=../libatomic/libatomic_convenience.la
161 # Used to tell GNU make to include a file without telling automake to
163 go_include="-include"
166 # All known GOOS values. This is the union of all operating systems
167 # supported by the gofrontend and all operating systems supported by
169 ALLGOOS="aix android darwin dragonfly freebsd hurd illumos ios irix js linux netbsd openbsd plan9 rtems solaris windows zos"
184 *-*-darwin*) is_darwin=yes; GOOS=darwin ;;
185 *-*-freebsd*) is_freebsd=yes; GOOS=freebsd ;;
186 *-*-irix6*) is_irix=yes; GOOS=irix ;;
187 *-*-linux*) is_linux=yes; GOOS=linux ;;
188 *-*-netbsd*) is_netbsd=yes; GOOS=netbsd ;;
189 *-*-openbsd*) is_openbsd=yes; GOOS=openbsd ;;
190 *-*-dragonfly*) is_dragonfly=yes; GOOS=dragonfly ;;
191 *-*-rtems*) is_rtems=yes; GOOS=rtems ;;
192 *-*-solaris2*) is_solaris=yes; GOOS=solaris ;;
193 *-*-aix*) is_aix=yes; GOOS=aix ;;
194 *-*-gnu*) is_hurd=yes; GOOS=hurd ;;
196 AM_CONDITIONAL(LIBGO_IS_DARWIN, test $is_darwin = yes)
197 AM_CONDITIONAL(LIBGO_IS_FREEBSD, test $is_freebsd = yes)
198 AM_CONDITIONAL(LIBGO_IS_IRIX, test $is_irix = yes)
199 AM_CONDITIONAL(LIBGO_IS_LINUX, test $is_linux = yes)
200 AM_CONDITIONAL(LIBGO_IS_NETBSD, test $is_netbsd = yes)
201 AM_CONDITIONAL(LIBGO_IS_OPENBSD, test $is_openbsd = yes)
202 AM_CONDITIONAL(LIBGO_IS_DRAGONFLY, test $is_dragonfly = yes)
203 AM_CONDITIONAL(LIBGO_IS_RTEMS, test $is_rtems = yes)
204 AM_CONDITIONAL(LIBGO_IS_SOLARIS, test $is_solaris = yes)
205 AM_CONDITIONAL(LIBGO_IS_AIX, test $is_aix = yes)
206 AM_CONDITIONAL(LIBGO_IS_HURD, test $is_hurd = yes)
207 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)
211 dnl Test whether we need to use DejaGNU or whether we can use the
212 dnl simpler gotest approach. We can only use gotest for a native
216 *-*-rtems*) USE_DEJAGNU=yes ;;
218 *) USE_DEJAGNU=yes ;;
220 AC_SUBST(USE_DEJAGNU)
222 # All known GOARCH values. This is the union of all architectures
223 # supported by the gofrontend and all architectures supported by the
225 # To add a new architecture:
226 # - add it to this list
227 # - if appropriate, add an entry to ALLGOARCHFAMILY below
228 # - add an entry to the case on ${host} below to set GOARCH
229 # - update goarchList in libgo/go/go/build/syslist.go
230 # - update goarch.sh to report the values for this architecture
231 # - update go-set-goarch in gcc/testsuite/go.test/go-test.exp
232 # - update ptrSizeMap and intSizeMap in libgo/go/cmd/cgo/main.go
233 # - update arch lists in libgo/match.sh
234 # - update arch lists in libgo/testsuite/gotest
235 # - update +build lines in several places
236 # - libgo/go/runtime/lfstack_NNbit.go
237 # - libgo/go/runtime/hashNN.go
238 # - libgo/go/runtime/unalignedN.go
239 # - libgo/go/syscall/endian_XX.go
241 # - possibly update files in libgo/go/internal/syscall/unix
242 ALLGOARCH="386 alpha amd64 amd64p32 arm armbe arm64 arm64be ia64 m68k mips mipsle mips64 mips64le mips64p32 mips64p32le nios2 ppc ppc64 ppc64le riscv riscv64 s390 s390x sh shbe sparc sparc64 wasm"
244 # All known GOARCH family values.
245 ALLGOARCHFAMILY="I386 ALPHA AMD64 ARM ARM64 IA64 M68K MIPS MIPS64 NIOS2 PPC PPC64 RISCV RISCV64 S390 S390X SH SPARC SPARC64 WASM"
258 arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
267 i[34567]86-*-* | x86_64-*-*)
269 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
275 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
290 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
291 #if _MIPS_SIM != _ABIO32
296 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([
297 #if _MIPS_SIM != _ABIN32
302 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([
303 #if _MIPS_SIM != _ABI64
308 [AC_MSG_ERROR([unknown MIPS ABI])
309 [mips_abi="n32"]])])])
311 "o32") GOARCH=mips ;;
312 "n32") GOARCH=mips64p32 ;;
313 "n64") GOARCH=mips64 ;;
324 rs6000*-*-* | powerpc*-*-*)
325 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
332 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
333 #if defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN__)
341 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
342 #if __riscv_xlen == 64
350 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
351 #if defined(__s390x__)
358 sh3eb*-*-* | sh4eb*-*-*)
365 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
366 #if defined(__sparcv9) || defined(__arch64__)
376 AC_SUBST(ALLGOARCHFAMILY)
378 AM_CONDITIONAL(LIBGO_IS_X86, test "$GOARCH" = "386" -o "$GOARCH" = "amd64" -o "$GOARCH" = "amd64p32")
380 FUNCTION_DESCRIPTORS=false
382 rs6000*-*-* | powerpc*-*-*)
383 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
388 [FUNCTION_DESCRIPTORS=false],
389 [FUNCTION_DESCRIPTORS=true])
392 AC_SUBST(FUNCTION_DESCRIPTORS)
394 dnl Some files are only present when needed for specific architectures.
396 GO_LIBCALL_OS_ARCH_FILE=
398 GO_SYSCALL_OS_ARCH_FILE=
399 if test -f "${srcdir}/go/syscall/libcall_${GOOS}.go"; then
400 GO_LIBCALL_OS_FILE="go/syscall/libcall_${GOOS}.go"
402 if test -f "${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go"; then
403 GO_LIBCALL_OS_ARCH_FILE="go/syscall/libcall_${GOOS}_${GOARCH}.go"
405 if test -f "${srcdir}/go/syscall/syscall_${GOOS}.go"; then
406 GO_SYSCALL_OS_FILE="go/syscall/syscall_${GOOS}.go"
408 if test -f "${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go"; then
409 GO_SYSCALL_OS_ARCH_FILE="go/syscall/syscall_${GOOS}_${GOARCH}.go"
411 AC_SUBST(GO_LIBCALL_OS_FILE)
412 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
413 AC_SUBST(GO_SYSCALL_OS_FILE)
414 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
416 dnl Special flags used to generate sysinfo.go.
417 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
420 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
421 # msghdr in <sys/socket.h>.
422 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
425 # Solaris 10+ needs this so struct msghdr gets the msg_control
426 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
427 # above doesn't work with C99.
428 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
433 dnl Check if assembler supports disabling hardware capability support.
434 GCC_CHECK_ASSEMBLER_HWCAP
436 dnl Use -fsplit-stack when compiling C code if available.
437 AC_CACHE_CHECK([whether -fsplit-stack is supported],
438 [libgo_cv_c_split_stack_supported],
440 CFLAGS="$CFLAGS -fsplit-stack"
441 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
442 [libgo_cv_c_split_stack_supported=yes],
443 [libgo_cv_c_split_stack_supported=no])
444 CFLAGS=$CFLAGS_hold])
446 dnl Make sure the linker permits -fsplit-stack. Old versions of gold will
447 dnl reject split-stack code calling non-split-stack code on targets
448 dnl they don't support.
449 AC_CACHE_CHECK([whether linker supports split/non-split linked together],
450 [libgo_cv_c_linker_split_non_split],
451 [cat > conftest1.c << EOF
453 int main() { f(); return 0; }
455 cat > conftest2.c << EOF
458 $CC -c -fsplit-stack $CFLAGS $CPPFLAGS conftest1.c >/dev/null 2>&1
459 $CC -c $CFLAGS $CPPFLAGS conftest2.c > /dev/null 2>&1
460 if $CC -o conftest conftest1.$ac_objext conftest2.$ac_objext > /dev/null 2>&1; then
461 libgo_cv_c_linker_split_non_split=yes
463 libgo_cv_c_linker_split_non_split=no
465 rm -f conftest1.* conftest2.* conftest])
467 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes; then
468 SPLIT_STACK=-fsplit-stack
469 AC_DEFINE(USING_SPLIT_STACK, 1,
470 [Define if the compiler supports -fsplit-stack])
474 AC_SUBST(SPLIT_STACK)
475 AM_CONDITIONAL(USING_SPLIT_STACK,
476 test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes)
478 dnl If the compiler supports split-stack but the linker does not, then
479 dnl we need to explicitly disable split-stack for Go.
480 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = no; then
481 GO_SPLIT_STACK=-fno-split-stack
485 AC_SUBST(GO_SPLIT_STACK)
487 dnl Check whether the linker does stack munging when calling from
488 dnl split-stack into non-split-stack code. We check this by looking
489 dnl at the --help output. FIXME: This is only half right: it's
490 dnl possible for the linker to support this for some targets but not
492 dnl This is slightly different from the above check, which is whether
493 dnl the linker permits the call at all.
494 AC_CACHE_CHECK([whether linker supports split stack],
495 [libgo_cv_c_linker_supports_split_stack],
496 [libgo_cv_c_linker_supports_split_stack=no
497 if $GOC -Wl,--help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
498 libgo_cv_c_linker_supports_split_stack=yes
500 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
501 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
502 [Define if the linker support split stack adjustments])
505 AC_CACHE_CHECK([whether compiler is llgo],
506 [libgo_cv_c_goc_is_llgo],
507 [libgo_cv_c_goc_is_llgo=no
508 if $GOC -dumpversion 2>/dev/null | grep llgo >/dev/null 2>&1; then
509 libgo_cv_c_goc_is_llgo=yes
511 AM_CONDITIONAL(GOC_IS_LLGO, test "$libgo_cv_c_goc_is_llgo" = yes)
513 dnl Test for the -lm library.
515 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
518 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
519 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
520 [libgo_cv_lib_sockets=
522 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
523 if test "$libgo_check_socket" = "yes"; then
524 unset ac_cv_func_connect
525 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
526 libgo_check_both=yes)
528 if test "$libgo_check_both" = "yes"; then
530 LIBS="$LIBS -lsocket -lnsl"
531 unset ac_cv_func_accept
532 AC_CHECK_FUNC(accept,
534 libgo_cv_lib_sockets="-lsocket -lnsl"])
535 unset ac_cv_func_accept
538 unset ac_cv_func_gethostbyname
539 libgo_old_libs="$LIBS"
540 AC_CHECK_FUNC(gethostbyname, ,
541 [AC_CHECK_LIB(nsl, main,
542 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
543 unset ac_cv_func_gethostbyname
544 AC_CHECK_FUNC(sendfile, ,
545 [AC_CHECK_LIB(sendfile, main,
546 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lsendfile"])])
549 NET_LIBS="$libgo_cv_lib_sockets"
552 dnl Test whether the compiler supports the -pthread option.
553 AC_CACHE_CHECK([whether -pthread is supported],
554 [libgo_cv_lib_pthread],
556 CFLAGS="$CFLAGS -pthread -L../libatomic/.libs"
557 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
558 [libgo_cv_lib_pthread=yes],
559 [libgo_cv_lib_pthread=no])
560 CFLAGS=$CFLAGS_hold])
562 if test "$libgo_cv_lib_pthread" = yes; then
563 # RISC-V apparently adds -latomic when using -pthread.
564 PTHREAD_CFLAGS="-pthread -L../libatomic/.libs"
566 AC_SUBST(PTHREAD_CFLAGS)
568 dnl Test for the -lpthread library.
570 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
571 AC_SUBST(PTHREAD_LIBS)
573 dnl Test if -lucontext is required for makecontext.
574 AC_SEARCH_LIBS([makecontext], [ucontext])
576 dnl Test if -lrt is required for sched_yield or nanosleep or clock_gettime.
577 AC_SEARCH_LIBS([sched_yield], [rt])
578 AC_SEARCH_LIBS([nanosleep], [rt])
579 AC_SEARCH_LIBS([clock_gettime], [rt])
583 GCC_CHECK_UNWIND_GETIPINFO
585 AC_CHECK_HEADERS(fcntl.h 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/sysctl.h sys/user.h sys/utsname.h sys/select.h sys/socket.h net/bpf.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 lwp.h)
587 AC_CHECK_HEADERS([netinet/icmp6.h], [], [],
588 [#include <netinet/in.h>
591 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
592 [#ifdef HAVE_SYS_SOCKET_H
593 #include <sys/socket.h>
597 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
599 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv unsetenv dl_iterate_phdr memmem)
600 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
601 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
603 AC_STRUCT_DIRENT_D_TYPE
605 AC_CHECK_FUNCS(accept4 dup3 epoll_create1 faccessat fallocate fchmodat fchownat futimesat getxattr inotify_add_watch inotify_init inotify_init1 inotify_rm_watch listxattr mkdirat mknodat open64 openat pipe2 removexattr renameat setxattr sync_file_range splice syscall tee unlinkat unshare utimensat)
608 CFLAGS_hold="$CFLAGS"
609 CFLAGS="$OSCFLAGS $CFLAGS"
610 AC_CHECK_TYPES([loff_t], [], [], [[
611 #include <sys/types.h>
614 CFLAGS="$CFLAGS_hold"
618 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
621 CFLAGS_hold="$CFLAGS"
622 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
624 LIBS="$LIBS $PTHREAD_LIBS"
625 AC_CHECK_FUNCS(sem_timedwait)
626 CFLAGS="$CFLAGS_hold"
630 LIBS="$LIBS $MATH_LIBS"
631 AC_CHECK_FUNCS(matherr)
634 dnl For x86 we want to use the -minline-all-stringops option to avoid
635 dnl forcing a stack split when calling memcpy and friends.
636 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
637 [libgo_cv_c_stringops],
639 CFLAGS="$CFLAGS -minline-all-stringops"
640 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
641 [libgo_cv_c_stringops=yes],
642 [libgo_cv_c_stringops=no])
643 CFLAGS=$CFLAGS_hold])
645 if test "$libgo_cv_c_stringops" = yes; then
646 STRINGOPS_FLAG=-minline-all-stringops
648 AC_SUBST(STRINGOPS_FLAG)
650 dnl For x86 we want to compile the math library with -mfancy-math-387
651 dnl so that we can use the builtin instructions directly.
652 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
653 [libgo_cv_c_fancymath],
655 CFLAGS="$CFLAGS -mfancy-math-387"
656 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
657 [libgo_cv_c_fancymath=yes],
658 [libgo_cv_c_fancymath=no])
659 CFLAGS=$CFLAGS_hold])
661 if test "$libgo_cv_c_fancymath" = yes; then
662 MATH_FLAG="-mfancy-math-387"
664 MATH_FLAG="${MATH_FLAG} -ffp-contract=off -fno-math-errno -fno-trapping-math"
668 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
669 AC_CHECK_TYPES([off64_t])
672 dnl Work out the size of the epoll_events struct on GNU/Linux.
673 AC_CACHE_CHECK([epoll_event size],
674 [libgo_cv_c_epoll_event_size],
675 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
676 [sizeof (struct epoll_event)],
677 [#include <sys/epoll.h>],
678 [libgo_cv_c_epoll_event_size=0])])
679 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
680 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
682 dnl Work out the offset of the fd field in the epoll_events struct on
684 AC_CACHE_CHECK([epoll_event data.fd offset],
685 [libgo_cv_c_epoll_event_fd_offset],
686 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
687 [offsetof (struct epoll_event, data.fd)],
689 #include <sys/epoll.h>],
690 [libgo_cv_c_epoll_event_fd_offset=0])])
691 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
692 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
694 dnl Check if <sys/stat.h> uses timespec_t for st_?tim members. Introduced
695 dnl in Solaris 11.4 for XPG7 compatibility.
696 AC_EGREP_HEADER([timespec_t.*st_atim], [sys/stat.h],
697 [have_stat_timespec=yes], [have_stat_timespec=no])
698 AM_CONDITIONAL(HAVE_STAT_TIMESPEC, test $have_stat_timespec = yes)
700 dnl See if struct exception is defined in <math.h>.
701 AC_CHECK_TYPE([struct exception],
702 [libgo_has_struct_exception=yes],
703 [libgo_has_struct_exception=no],
705 if test "$libgo_has_struct_exception" = "yes"; then
706 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
707 [Define to 1 if <math.h> defines struct exception])
710 dnl See whether setcontext changes the value of TLS variables.
711 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
712 [libgo_cv_lib_setcontext_clobbers_tls],
713 [CFLAGS_hold="$CFLAGS"
714 CFLAGS="$PTHREAD_CFLAGS"
716 LIBS="$LIBS $PTHREAD_LIBS"
717 AC_CHECK_SIZEOF([void *])
718 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
723 #include <ucontext.h>
728 static char stack[[10 * 1024 * 1024]];
731 /* Called via makecontext/setcontext. */
739 /* Called via pthread_create. */
744 /* The thread should still see this value after calling
750 /* The call to setcontext should not return. */
759 /* The thread should not see this value. */
762 if (getcontext (&c) < 0)
765 c.uc_stack.ss_sp = stack;
766 #ifdef MAKECONTEXT_STACK_TOP
767 c.uc_stack.ss_sp += sizeof stack;
769 c.uc_stack.ss_flags = 0;
770 c.uc_stack.ss_size = sizeof stack;
772 makecontext (&c, cfn, 0);
774 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
777 if (pthread_join (tid, NULL) != 0)
780 /* The thread should have called exit. */
784 [libgo_cv_lib_setcontext_clobbers_tls=no],
785 [libgo_cv_lib_setcontext_clobbers_tls=yes],
786 [case "$target:$ptr_type_size" in
787 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
788 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
790 libgo_cv_lib_setcontext_clobbers_tls=no ;;
793 CFLAGS="$CFLAGS_hold"
796 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
797 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
798 [Define if setcontext clobbers TLS variables])
801 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
802 libgo_cv_ro_eh_frame, [
803 libgo_cv_ro_eh_frame=no
804 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
805 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
806 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
807 libgo_cv_ro_eh_frame=yes
808 elif grep '.section.*eh_frame.*#alloc' conftest.c \
809 | grep -v '#write' > /dev/null; then
810 libgo_cv_ro_eh_frame=yes
815 if test "x$libgo_cv_ro_eh_frame" = xyes; then
816 AC_DEFINE(EH_FRAME_FLAGS, "a",
817 [Define to the flags needed for the .section .eh_frame directive.])
819 AC_DEFINE(EH_FRAME_FLAGS, "aw",
820 [Define to the flags needed for the .section .eh_frame directive.])
823 AC_CACHE_CHECK([if compiler supports -Qunused-arguments],
824 [libgo_cv_c_unused_arguments],
826 CFLAGS="$CFLAGS -Qunused-arguments"
827 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
828 [libgo_cv_c_unused_arguments=yes],
829 [libgo_cv_c_unused_arguments=no])
830 CFLAGS=$CFLAGS_hold])
832 AC_CACHE_CHECK([if assembler supports GNU comdat group syntax],
833 libgo_cv_as_comdat_gnu, [
834 echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s
836 if test "$libgo_cv_c_unused_arguments" = yes; then
837 CFLAGS="$CFLAGS -Qunused-arguments"
839 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
840 libgo_cv_as_comdat_gnu=yes
842 libgo_cv_as_comdat_gnu=no
846 if test "x$libgo_cv_as_comdat_gnu" = xyes; then
847 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1,
848 [Define if your assembler supports GNU comdat group syntax.])
851 AC_CACHE_CHECK([assembler supports pc related relocs],
852 libgo_cv_as_x86_pcrel, [
853 libgo_cv_as_x86_pcrel=yes
854 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
856 if test "$libgo_cv_c_unused_arguments" = yes; then
857 CFLAGS="$CFLAGS -Qunused-arguments"
859 if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
860 libgo_cv_as_x86_pcrel=no
864 if test "x$libgo_cv_as_x86_pcrel" = xyes; then
865 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
866 [Define if your assembler supports PC relative relocs.])
869 AC_CACHE_CHECK([assembler supports unwind section type],
870 libgo_cv_as_x86_64_unwind_section_type, [
871 libgo_cv_as_x86_64_unwind_section_type=yes
872 echo '.section .eh_frame,"a",@unwind' > conftest.s
874 if test "$libgo_cv_c_unused_arguments" = yes; then
875 CFLAGS="$CFLAGS -Qunused-arguments"
877 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
878 libgo_cv_as_x86_64_unwind_section_type=no
882 if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then
883 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
884 [Define if your assembler supports unwind section type.])
887 AC_CACHE_CHECK([assembler supports AES instructions],
888 libgo_cv_as_x86_aes, [
889 libgo_cv_as_x86_aes=yes
890 echo 'aesenc %xmm0, %xmm1' > conftest.s
892 if test "$libgo_cv_c_unused_arguments" = yes; then
893 CFLAGS="$CFLAGS -Qunused-arguments"
895 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i error > /dev/null; then
896 libgo_cv_as_x86_aes=no
900 if test "x$libgo_cv_as_x86_aes" = xyes; then
901 AC_DEFINE(HAVE_AS_X86_AES, 1,
902 [Define if your assembler supports AES instructions.])
905 dnl Test whether the linker supports the -static option.
906 AC_CACHE_CHECK([whether -static is supported],
907 [libgo_cv_ld_static],
908 [LDFLAGS_hold=$LDFLAGS
909 LDFLAGS="$LDFLAGS -static"
910 AC_LINK_IFELSE([AC_LANG_PROGRAM(,)],
911 [libgo_cv_ld_static=yes],
912 [libgo_cv_ld_static=no])
913 LDFLAGS=$LDFLAGS_hold])
914 AM_CONDITIONAL(HAVE_STATIC_LINK, test "$libgo_cv_ld_static" = yes)
918 if test ${multilib} = yes; then
919 multilib_arg="--enable-multilib"
924 AC_CONFIG_FILES(Makefile testsuite/Makefile testsuite/libgo-test-support.exp)
926 AC_CONFIG_COMMANDS([default],
927 [if test -n "$CONFIG_FILES"; then
928 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
929 # that multilib installs will end up installed in the correct place.
930 # The testsuite needs it for multilib-aware ABI baseline files.
931 # To work around this not being passed down from config-ml.in ->
932 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
933 # append it here. Only modify Makefiles that have just been created.
935 # Also, get rid of this simulated-VPATH thing that automake does.
937 s!`test -f '$<' || echo '$(srcdir)/'`!!
939 for i in $SUBDIRS; do
940 case $CONFIG_FILES in
942 #echo "Adding MULTISUBDIR to $i/Makefile"
943 sed -f vpsed $i/Makefile > tmp
944 grep '^MULTISUBDIR =' Makefile >> tmp
953 # Variables needed in config.status (file generation) which aren't already
954 # passed by autoconf.