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=23:0:0
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 "`$CC -x c -E /dev/null -g3 -o - | grep 64BIT`" ; then
42 AC_SUBST(AIX_EXTRA_ARCH)
50 AC_CHECK_TOOL(OBJCOPY, objcopy, missing-objcopy)
54 AC_SUBST(enable_shared)
55 AC_SUBST(enable_static)
56 AM_CONDITIONAL([ENABLE_DARWIN_AT_RPATH], [test x$enable_darwin_at_rpath = xyes])
58 CC_FOR_BUILD=${CC_FOR_BUILD:-gcc}
59 AC_SUBST(CC_FOR_BUILD)
63 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
66 AC_ARG_ENABLE([werror],
67 [AS_HELP_STRING([--disable-werror], [disable building with -Werror])])
68 AS_IF([test "x$enable_werror" != "xno" && test "x$GCC" = "xyes"],
73 glibgo_toolexeclibdir=no
75 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
76 AC_ARG_ENABLE([version-specific-runtime-libs],
77 AC_HELP_STRING([--enable-version-specific-runtime-libs],
78 [Specify that runtime libraries should be installed in a compiler-specific directory]),
80 yes) version_specific_libs=yes ;;
81 no) version_specific_libs=no ;;
82 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
84 [version_specific_libs=no])
85 AC_MSG_RESULT($version_specific_libs)
87 GCC_WITH_TOOLEXECLIBDIR
89 # Version-specific runtime libs processing.
90 if test $version_specific_libs = yes; then
91 glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
92 glibgo_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
95 # Calculate glibgo_toolexecdir, glibgo_toolexeclibdir
96 # Install a library built with a cross compiler in tooldir, not libdir.
97 if test -n "$with_cross_host" &&
98 test x"$with_cross_host" != x"no"; then
99 nover_glibgo_toolexecdir='${exec_prefix}/${host_alias}'
100 case ${with_toolexeclibdir} in
102 nover_glibgo_toolexeclibdir='${toolexecdir}/lib'
105 nover_glibgo_toolexeclibdir=${with_toolexeclibdir}
109 nover_glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
110 nover_glibgo_toolexeclibdir='${libdir}'
112 multi_os_directory=`$GOC -print-multi-os-directory`
113 case $multi_os_directory in
114 .) ;; # Avoid trailing /.
115 *) nover_glibgo_toolexeclibdir=${nover_glibgo_toolexeclibdir}/${multi_os_directory} ;;
118 if test x"$glibgo_toolexecdir" = x"no"; then
119 glibgo_toolexecdir="${nover_glibgo_toolexecdir}"
120 glibgo_toolexeclibdir="${nover_glibgo_toolexeclibdir}"
123 AC_SUBST(glibgo_toolexecdir)
124 AC_SUBST(glibgo_toolexeclibdir)
125 AC_SUBST(nover_glibgo_toolexeclibdir)
127 # See if the user wants to configure without libffi. Some
128 # architectures don't support it. FIXME: We should set a default
131 AS_HELP_STRING([--without-libffi],
134 [with_libffi=${with_libffi_default-yes}])
138 if test "$with_libffi" != no; then
139 AC_DEFINE(USE_LIBFFI, 1, [Define if we're to use libffi.])
140 LIBFFI=../libffi/libffi_convenience.la
141 LIBFFIINCS='-I$(top_srcdir)/../libffi/include -I../libffi/include'
145 AM_CONDITIONAL(USE_LIBFFI, test "$with_libffi" != "no")
147 # See if the user wants to configure without libatomic. This is useful if we are
148 # on an architecture for which libgo does not need an atomic support library and
149 # libatomic does not support our C compiler.
150 AC_ARG_WITH(libatomic,
151 AS_HELP_STRING([--without-libatomic],
152 [don't use libatomic]),
154 [with_libatomic=${with_libatomic_default-yes}])
157 if test "$with_libatomic" != no; then
158 LIBATOMIC=../libatomic/libatomic_convenience.la
162 # Used to tell GNU make to include a file without telling automake to
164 go_include="-include"
167 # All known GOOS values. This is the union of all operating systems
168 # supported by the gofrontend and all operating systems supported by
170 ALLGOOS="aix android darwin dragonfly freebsd hurd illumos ios irix js linux netbsd openbsd plan9 rtems solaris windows zos"
185 *-*-darwin*) is_darwin=yes; GOOS=darwin ;;
186 *-*-freebsd*) is_freebsd=yes; GOOS=freebsd ;;
187 *-*-irix6*) is_irix=yes; GOOS=irix ;;
188 *-*-linux*) is_linux=yes; GOOS=linux ;;
189 *-*-netbsd*) is_netbsd=yes; GOOS=netbsd ;;
190 *-*-openbsd*) is_openbsd=yes; GOOS=openbsd ;;
191 *-*-dragonfly*) is_dragonfly=yes; GOOS=dragonfly ;;
192 *-*-rtems*) is_rtems=yes; GOOS=rtems ;;
193 *-*-solaris2*) is_solaris=yes; GOOS=solaris ;;
194 *-*-aix*) is_aix=yes; GOOS=aix ;;
195 *-*-gnu*) is_hurd=yes; GOOS=hurd ;;
197 AM_CONDITIONAL(LIBGO_IS_DARWIN, test $is_darwin = yes)
198 AM_CONDITIONAL(LIBGO_IS_FREEBSD, test $is_freebsd = yes)
199 AM_CONDITIONAL(LIBGO_IS_IRIX, test $is_irix = yes)
200 AM_CONDITIONAL(LIBGO_IS_LINUX, test $is_linux = yes)
201 AM_CONDITIONAL(LIBGO_IS_NETBSD, test $is_netbsd = yes)
202 AM_CONDITIONAL(LIBGO_IS_OPENBSD, test $is_openbsd = yes)
203 AM_CONDITIONAL(LIBGO_IS_DRAGONFLY, test $is_dragonfly = yes)
204 AM_CONDITIONAL(LIBGO_IS_RTEMS, test $is_rtems = yes)
205 AM_CONDITIONAL(LIBGO_IS_SOLARIS, test $is_solaris = yes)
206 AM_CONDITIONAL(LIBGO_IS_AIX, test $is_aix = yes)
207 AM_CONDITIONAL(LIBGO_IS_HURD, test $is_hurd = yes)
208 AM_CONDITIONAL(LIBGO_IS_BSD, test $is_darwin = yes -o $is_dragonfly = yes -o $is_freebsd = yes -o $is_netbsd = yes -o $is_openbsd = yes)
212 if test "${GOOS}" = "unknown"; then
213 AC_MSG_ERROR("could not determine GOOS from ${host}")
216 dnl Test whether we need to use DejaGNU or whether we can use the
217 dnl simpler gotest approach. We can only use gotest for a native
221 *-*-rtems*) USE_DEJAGNU=yes ;;
223 *) USE_DEJAGNU=yes ;;
225 AC_SUBST(USE_DEJAGNU)
227 # All known GOARCH values. This is the union of all architectures
228 # supported by the gofrontend and all architectures supported by the
230 # To add a new architecture:
231 # - add it to this list
232 # - if appropriate, add an entry to ALLGOARCHFAMILY below
233 # - add an entry to the case on ${host} below to set GOARCH
234 # - update goarchList in libgo/go/go/build/syslist.go
235 # - update goarch.sh to report the values for this architecture
236 # - update go-set-goarch in gcc/testsuite/go.test/go-test.exp
237 # - update ptrSizeMap and intSizeMap in libgo/go/cmd/cgo/main.go
238 # - update arch lists in libgo/match.sh
239 # - update arch lists in libgo/testsuite/gotest
240 # - update +build lines in several places
241 # - libgo/go/runtime/lfstack_NNbit.go
242 # - libgo/go/runtime/hashNN.go
243 # - libgo/go/runtime/unalignedN.go
244 # - libgo/go/syscall/endian_XX.go
246 # - possibly update files in libgo/go/internal/syscall/unix
247 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"
249 # All known GOARCH family values.
250 ALLGOARCHFAMILY="I386 ALPHA AMD64 ARM ARM64 IA64 M68K MIPS MIPS64 NIOS2 PPC PPC64 RISCV RISCV64 S390 S390X SH SPARC SPARC64 WASM"
263 arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
272 i[34567]86-*-* | x86_64-*-*)
274 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
280 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
295 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
296 #if _MIPS_SIM != _ABIO32
301 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([
302 #if _MIPS_SIM != _ABIN32
307 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([
308 #if _MIPS_SIM != _ABI64
313 [AC_MSG_ERROR([unknown MIPS ABI])
314 [mips_abi="n32"]])])])
316 "o32") GOARCH=mips ;;
317 "n32") GOARCH=mips64p32 ;;
318 "n64") GOARCH=mips64 ;;
329 rs6000*-*-* | powerpc*-*-*)
330 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
337 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
338 #if defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN__)
346 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
347 #if __riscv_xlen == 64
355 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
356 #if defined(__s390x__)
363 sh3eb*-*-* | sh4eb*-*-*)
370 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
371 #if defined(__sparcv9) || defined(__arch64__)
381 AC_SUBST(ALLGOARCHFAMILY)
383 if test "${GOARCH}" = "unknown"; then
384 AC_MSG_ERROR("could not determine GOARCH from ${host}")
387 AM_CONDITIONAL(LIBGO_IS_X86, test "$GOARCH" = "386" -o "$GOARCH" = "amd64" -o "$GOARCH" = "amd64p32")
389 FUNCTION_DESCRIPTORS=false
391 rs6000*-*-* | powerpc*-*-*)
392 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
397 [FUNCTION_DESCRIPTORS=false],
398 [FUNCTION_DESCRIPTORS=true])
401 AC_SUBST(FUNCTION_DESCRIPTORS)
403 dnl Some files are only present when needed for specific architectures.
405 GO_LIBCALL_OS_ARCH_FILE=
407 GO_SYSCALL_OS_ARCH_FILE=
408 if test -f "${srcdir}/go/syscall/libcall_${GOOS}.go"; then
409 GO_LIBCALL_OS_FILE="go/syscall/libcall_${GOOS}.go"
411 if test -f "${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go"; then
412 GO_LIBCALL_OS_ARCH_FILE="go/syscall/libcall_${GOOS}_${GOARCH}.go"
414 if test -f "${srcdir}/go/syscall/syscall_${GOOS}.go"; then
415 GO_SYSCALL_OS_FILE="go/syscall/syscall_${GOOS}.go"
417 if test -f "${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go"; then
418 GO_SYSCALL_OS_ARCH_FILE="go/syscall/syscall_${GOOS}_${GOARCH}.go"
420 AC_SUBST(GO_LIBCALL_OS_FILE)
421 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
422 AC_SUBST(GO_SYSCALL_OS_FILE)
423 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
425 dnl Special flags used to generate sysinfo.go.
426 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
429 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
430 # msghdr in <sys/socket.h>.
431 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
434 # Solaris 10+ needs this so struct msghdr gets the msg_control
435 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
436 # above doesn't work with C99.
437 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
442 dnl Check if assembler supports disabling hardware capability support.
443 GCC_CHECK_ASSEMBLER_HWCAP
445 dnl Use -fsplit-stack when compiling C code if available.
446 AC_CACHE_CHECK([whether -fsplit-stack is supported],
447 [libgo_cv_c_split_stack_supported],
449 CFLAGS="$CFLAGS -fsplit-stack"
450 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
451 [libgo_cv_c_split_stack_supported=yes],
452 [libgo_cv_c_split_stack_supported=no])
453 CFLAGS=$CFLAGS_hold])
455 dnl Make sure the linker permits -fsplit-stack. Old versions of gold will
456 dnl reject split-stack code calling non-split-stack code on targets
457 dnl they don't support.
458 AC_CACHE_CHECK([whether linker supports split/non-split linked together],
459 [libgo_cv_c_linker_split_non_split],
460 [cat > conftest1.c << EOF
462 int main() { f(); return 0; }
464 cat > conftest2.c << EOF
467 $CC -c -fsplit-stack $CFLAGS $CPPFLAGS conftest1.c >/dev/null 2>&1
468 $CC -c $CFLAGS $CPPFLAGS conftest2.c > /dev/null 2>&1
469 if $CC -o conftest conftest1.$ac_objext conftest2.$ac_objext > /dev/null 2>&1; then
470 libgo_cv_c_linker_split_non_split=yes
472 libgo_cv_c_linker_split_non_split=no
474 rm -f conftest1.* conftest2.* conftest])
476 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes; then
477 SPLIT_STACK=-fsplit-stack
478 AC_DEFINE(USING_SPLIT_STACK, 1,
479 [Define if the compiler supports -fsplit-stack])
483 AC_SUBST(SPLIT_STACK)
484 AM_CONDITIONAL(USING_SPLIT_STACK,
485 test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes)
487 dnl If the compiler supports split-stack but the linker does not, then
488 dnl we need to explicitly disable split-stack for Go.
489 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = no; then
490 GO_SPLIT_STACK=-fno-split-stack
494 AC_SUBST(GO_SPLIT_STACK)
496 dnl Check whether the linker does stack munging when calling from
497 dnl split-stack into non-split-stack code. We check this by looking
498 dnl at the --help output. FIXME: This is only half right: it's
499 dnl possible for the linker to support this for some targets but not
501 dnl This is slightly different from the above check, which is whether
502 dnl the linker permits the call at all.
503 AC_CACHE_CHECK([whether linker supports split stack],
504 [libgo_cv_c_linker_supports_split_stack],
505 [libgo_cv_c_linker_supports_split_stack=no
506 if $GOC -Wl,--help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
507 libgo_cv_c_linker_supports_split_stack=yes
509 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
510 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
511 [Define if the linker support split stack adjustments])
514 AC_CACHE_CHECK([whether compiler is llgo],
515 [libgo_cv_c_goc_is_llgo],
516 [libgo_cv_c_goc_is_llgo=no
517 if $GOC -dumpversion 2>/dev/null | grep llgo >/dev/null 2>&1; then
518 libgo_cv_c_goc_is_llgo=yes
520 AM_CONDITIONAL(GOC_IS_LLGO, test "$libgo_cv_c_goc_is_llgo" = yes)
522 dnl Test for the -lm library.
524 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
527 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
528 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
529 [libgo_cv_lib_sockets=
531 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
532 if test "$libgo_check_socket" = "yes"; then
533 unset ac_cv_func_connect
534 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
535 libgo_check_both=yes)
537 if test "$libgo_check_both" = "yes"; then
539 LIBS="$LIBS -lsocket -lnsl"
540 unset ac_cv_func_accept
541 AC_CHECK_FUNC(accept,
543 libgo_cv_lib_sockets="-lsocket -lnsl"])
544 unset ac_cv_func_accept
547 unset ac_cv_func_gethostbyname
548 libgo_old_libs="$LIBS"
549 AC_CHECK_FUNC(gethostbyname, ,
550 [AC_CHECK_LIB(nsl, main,
551 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
552 unset ac_cv_func_gethostbyname
553 AC_CHECK_FUNC(sendfile, ,
554 [AC_CHECK_LIB(sendfile, main,
555 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lsendfile"])])
558 NET_LIBS="$libgo_cv_lib_sockets"
561 dnl Test whether the compiler supports the -pthread option.
562 AC_CACHE_CHECK([whether -pthread is supported],
563 [libgo_cv_lib_pthread],
565 CFLAGS="$CFLAGS -pthread -L../libatomic/.libs"
566 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
567 [libgo_cv_lib_pthread=yes],
568 [libgo_cv_lib_pthread=no])
569 CFLAGS=$CFLAGS_hold])
571 if test "$libgo_cv_lib_pthread" = yes; then
572 # RISC-V apparently adds -latomic when using -pthread.
573 PTHREAD_CFLAGS="-pthread -L../libatomic/.libs"
575 AC_SUBST(PTHREAD_CFLAGS)
577 dnl Test for the -lpthread library.
579 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
580 AC_SUBST(PTHREAD_LIBS)
582 dnl Test if -lucontext is required for makecontext.
583 AC_SEARCH_LIBS([makecontext], [ucontext])
585 dnl Test if -lrt is required for sched_yield or nanosleep or clock_gettime.
586 AC_SEARCH_LIBS([sched_yield], [rt])
587 AC_SEARCH_LIBS([nanosleep], [rt])
588 AC_SEARCH_LIBS([clock_gettime], [rt])
592 GCC_CHECK_UNWIND_GETIPINFO
594 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)
596 AC_CHECK_HEADERS([netinet/icmp6.h], [], [],
597 [#include <netinet/in.h>
600 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
601 [#ifdef HAVE_SYS_SOCKET_H
602 #include <sys/socket.h>
606 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
608 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv unsetenv dl_iterate_phdr memmem)
609 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
610 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
612 AC_STRUCT_DIRENT_D_TYPE
614 AC_CHECK_FUNCS(accept4 dup3 epoll_create1 faccessat fallocate fchmodat fchownat futimesat getxattr inotify_add_watch inotify_init inotify_init1 inotify_rm_watch listxattr mkdirat mknodat open64 openat pipe2 removexattr renameat setxattr sync_file_range splice syscall tee unlinkat unshare utimensat)
617 CFLAGS_hold="$CFLAGS"
618 CFLAGS="$OSCFLAGS $CFLAGS"
619 AC_CHECK_TYPES([loff_t], [], [], [[
620 #include <sys/types.h>
623 CFLAGS="$CFLAGS_hold"
627 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
630 CFLAGS_hold="$CFLAGS"
631 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
633 LIBS="$LIBS $PTHREAD_LIBS"
634 AC_CHECK_FUNCS(sem_timedwait)
635 CFLAGS="$CFLAGS_hold"
639 LIBS="$LIBS $MATH_LIBS"
640 AC_CHECK_FUNCS(matherr)
643 dnl For x86 we want to use the -minline-all-stringops option to avoid
644 dnl forcing a stack split when calling memcpy and friends.
645 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
646 [libgo_cv_c_stringops],
648 CFLAGS="$CFLAGS -minline-all-stringops"
649 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
650 [libgo_cv_c_stringops=yes],
651 [libgo_cv_c_stringops=no])
652 CFLAGS=$CFLAGS_hold])
654 if test "$libgo_cv_c_stringops" = yes; then
655 STRINGOPS_FLAG=-minline-all-stringops
657 AC_SUBST(STRINGOPS_FLAG)
659 dnl For x86 we want to compile the math library with -mfancy-math-387
660 dnl so that we can use the builtin instructions directly.
661 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
662 [libgo_cv_c_fancymath],
664 CFLAGS="$CFLAGS -mfancy-math-387"
665 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
666 [libgo_cv_c_fancymath=yes],
667 [libgo_cv_c_fancymath=no])
668 CFLAGS=$CFLAGS_hold])
670 if test "$libgo_cv_c_fancymath" = yes; then
671 MATH_FLAG="-mfancy-math-387"
673 MATH_FLAG="${MATH_FLAG} -ffp-contract=off -fno-math-errno -fno-trapping-math"
677 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
678 AC_CHECK_TYPES([off64_t])
681 dnl Work out the size of the epoll_events struct on GNU/Linux.
682 AC_CACHE_CHECK([epoll_event size],
683 [libgo_cv_c_epoll_event_size],
684 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
685 [sizeof (struct epoll_event)],
686 [#include <sys/epoll.h>],
687 [libgo_cv_c_epoll_event_size=0])])
688 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
689 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
691 dnl Work out the offset of the fd field in the epoll_events struct on
693 AC_CACHE_CHECK([epoll_event data.fd offset],
694 [libgo_cv_c_epoll_event_fd_offset],
695 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
696 [offsetof (struct epoll_event, data.fd)],
698 #include <sys/epoll.h>],
699 [libgo_cv_c_epoll_event_fd_offset=0])])
700 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
701 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
703 dnl Check if <sys/stat.h> uses timespec_t for st_?tim members. Introduced
704 dnl in Solaris 11.4 for XPG7 compatibility.
705 AC_EGREP_HEADER([timespec_t.*st_atim], [sys/stat.h],
706 [have_stat_timespec=yes], [have_stat_timespec=no])
707 AM_CONDITIONAL(HAVE_STAT_TIMESPEC, test $have_stat_timespec = yes)
709 dnl See if struct exception is defined in <math.h>.
710 AC_CHECK_TYPE([struct exception],
711 [libgo_has_struct_exception=yes],
712 [libgo_has_struct_exception=no],
714 if test "$libgo_has_struct_exception" = "yes"; then
715 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
716 [Define to 1 if <math.h> defines struct exception])
719 dnl See whether setcontext changes the value of TLS variables.
720 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
721 [libgo_cv_lib_setcontext_clobbers_tls],
722 [CFLAGS_hold="$CFLAGS"
723 CFLAGS="$PTHREAD_CFLAGS"
725 LIBS="$LIBS $PTHREAD_LIBS"
726 AC_CHECK_SIZEOF([void *])
727 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
732 #include <ucontext.h>
737 static char stack[[10 * 1024 * 1024]];
740 /* Called via makecontext/setcontext. */
748 /* Called via pthread_create. */
753 /* The thread should still see this value after calling
759 /* The call to setcontext should not return. */
768 /* The thread should not see this value. */
771 if (getcontext (&c) < 0)
774 c.uc_stack.ss_sp = stack;
775 #ifdef MAKECONTEXT_STACK_TOP
776 c.uc_stack.ss_sp += sizeof stack;
778 c.uc_stack.ss_flags = 0;
779 c.uc_stack.ss_size = sizeof stack;
781 makecontext (&c, cfn, 0);
783 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
786 if (pthread_join (tid, NULL) != 0)
789 /* The thread should have called exit. */
793 [libgo_cv_lib_setcontext_clobbers_tls=no],
794 [libgo_cv_lib_setcontext_clobbers_tls=yes],
795 [case "$target:$ptr_type_size" in
796 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
797 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
799 libgo_cv_lib_setcontext_clobbers_tls=no ;;
802 CFLAGS="$CFLAGS_hold"
805 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
806 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
807 [Define if setcontext clobbers TLS variables])
810 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
811 libgo_cv_ro_eh_frame, [
812 libgo_cv_ro_eh_frame=no
813 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
814 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
815 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
816 libgo_cv_ro_eh_frame=yes
817 elif grep '.section.*eh_frame.*#alloc' conftest.c \
818 | grep -v '#write' > /dev/null; then
819 libgo_cv_ro_eh_frame=yes
824 if test "x$libgo_cv_ro_eh_frame" = xyes; then
825 AC_DEFINE(EH_FRAME_FLAGS, "a",
826 [Define to the flags needed for the .section .eh_frame directive.])
828 AC_DEFINE(EH_FRAME_FLAGS, "aw",
829 [Define to the flags needed for the .section .eh_frame directive.])
832 AC_CACHE_CHECK([if compiler supports -Qunused-arguments],
833 [libgo_cv_c_unused_arguments],
835 CFLAGS="$CFLAGS -Qunused-arguments"
836 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
837 [libgo_cv_c_unused_arguments=yes],
838 [libgo_cv_c_unused_arguments=no])
839 CFLAGS=$CFLAGS_hold])
841 AC_CACHE_CHECK([if assembler supports GNU comdat group syntax],
842 libgo_cv_as_comdat_gnu, [
843 echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s
845 if test "$libgo_cv_c_unused_arguments" = yes; then
846 CFLAGS="$CFLAGS -Qunused-arguments"
848 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
849 libgo_cv_as_comdat_gnu=yes
851 libgo_cv_as_comdat_gnu=no
855 if test "x$libgo_cv_as_comdat_gnu" = xyes; then
856 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1,
857 [Define if your assembler supports GNU comdat group syntax.])
860 AC_CACHE_CHECK([assembler supports pc related relocs],
861 libgo_cv_as_x86_pcrel, [
862 libgo_cv_as_x86_pcrel=yes
863 echo '.text; foo: nop; .data; .long foo-.; .text' > 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 | $EGREP -i 'illegal|warning' > /dev/null; then
869 libgo_cv_as_x86_pcrel=no
873 if test "x$libgo_cv_as_x86_pcrel" = xyes; then
874 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
875 [Define if your assembler supports PC relative relocs.])
878 AC_CACHE_CHECK([assembler supports unwind section type],
879 libgo_cv_as_x86_64_unwind_section_type, [
880 libgo_cv_as_x86_64_unwind_section_type=yes
881 echo '.section .eh_frame,"a",@unwind' > conftest.s
883 if test "$libgo_cv_c_unused_arguments" = yes; then
884 CFLAGS="$CFLAGS -Qunused-arguments"
886 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
887 libgo_cv_as_x86_64_unwind_section_type=no
891 if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then
892 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
893 [Define if your assembler supports unwind section type.])
896 AC_CACHE_CHECK([assembler supports AES instructions],
897 libgo_cv_as_x86_aes, [
898 libgo_cv_as_x86_aes=yes
899 echo 'aesenc %xmm0, %xmm1' > conftest.s
901 if test "$libgo_cv_c_unused_arguments" = yes; then
902 CFLAGS="$CFLAGS -Qunused-arguments"
904 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i error > /dev/null; then
905 libgo_cv_as_x86_aes=no
909 if test "x$libgo_cv_as_x86_aes" = xyes; then
910 AC_DEFINE(HAVE_AS_X86_AES, 1,
911 [Define if your assembler supports AES instructions.])
914 dnl Test whether the linker supports the -static option.
915 AC_CACHE_CHECK([whether -static is supported],
916 [libgo_cv_ld_static],
917 [LDFLAGS_hold=$LDFLAGS
918 LDFLAGS="$LDFLAGS -static"
919 AC_LINK_IFELSE([AC_LANG_PROGRAM(,)],
920 [libgo_cv_ld_static=yes],
921 [libgo_cv_ld_static=no])
922 LDFLAGS=$LDFLAGS_hold])
923 AM_CONDITIONAL(HAVE_STATIC_LINK, test "$libgo_cv_ld_static" = yes)
925 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
929 if test ${multilib} = yes; then
930 multilib_arg="--enable-multilib"
935 AC_CONFIG_FILES(Makefile testsuite/Makefile testsuite/libgo-test-support.exp)
937 AC_CONFIG_COMMANDS([default],
938 [if test -n "$CONFIG_FILES"; then
939 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
940 # that multilib installs will end up installed in the correct place.
941 # The testsuite needs it for multilib-aware ABI baseline files.
942 # To work around this not being passed down from config-ml.in ->
943 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
944 # append it here. Only modify Makefiles that have just been created.
946 # Also, get rid of this simulated-VPATH thing that automake does.
948 s!`test -f '$<' || echo '$(srcdir)/'`!!
950 for i in $SUBDIRS; do
951 case $CONFIG_FILES in
953 #echo "Adding MULTISUBDIR to $i/Makefile"
954 sed -f vpsed $i/Makefile > tmp
955 grep '^MULTISUBDIR =' Makefile >> tmp
964 # Variables needed in config.status (file generation) which aren't already
965 # passed by autoconf.