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 ${host} below to set GOARCH
214 # - update goarchList in libgo/go/go/build/syslist.go
215 # - update goarch.sh to report the values for this architecture
216 # - update go-set-goarch in gcc/testsuite/go.test/go-test.exp
217 # - update ptrSizeMap and intSizeMap in libgo/go/cmd/cgo/main.go
218 # - update arch lists in libgo/match.sh
219 # - update arch lists in libgo/testsuite/gotest
220 # - update +build lines in several places
221 # - libgo/go/runtime/lfstack_NNbit.go
222 # - libgo/go/runtime/hashNN.go
223 # - libgo/go/runtime/unalignedN.go
224 # - libgo/go/syscall/endian_XX.go
226 # - possibly update files in libgo/go/internal/syscall/unix
227 ALLGOARCH="386 alpha amd64 amd64p32 arm armbe arm64 arm64be ia64 m68k mips mipsle mips64 mips64le mips64p32 mips64p32le nios2 ppc ppc64 ppc64le riscv riscv64 s390 s390x sh shbe sparc sparc64 wasm"
229 # All known GOARCH family values.
230 ALLGOARCHFAMILY="I386 ALPHA AMD64 ARM ARM64 IA64 M68K MIPS MIPS64 NIOS2 PPC PPC64 RISCV RISCV64 S390 S390X SH SPARC SPARC64 WASM"
240 arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
249 i[34567]86-*-* | x86_64-*-*)
271 #if _MIPS_SIM != _ABIO32
276 #if _MIPS_SIM != _ABIN32
281 #if _MIPS_SIM != _ABI64
285 [AC_MSG_ERROR([unknown MIPS ABI])
286 [mips_abi="n32"]])])])
288 "o32") GOARCH=mips ;;
289 "n32") GOARCH=mips64p32 ;;
290 "n64") GOARCH=mips64 ;;
301 rs6000*-*-* | powerpc*-*-*)
309 #if defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN__)
320 #if defined(__s390x__)
326 sh3eb*-*-* | sh4eb*-*-*)
334 #if defined(__sparcv9) || defined(__arch64__)
343 AC_SUBST(ALLGOARCHFAMILY)
345 dnl Some files are only present when needed for specific architectures.
347 GO_LIBCALL_OS_ARCH_FILE=
349 GO_SYSCALL_OS_ARCH_FILE=
350 if test -f "${srcdir}/go/syscall/libcall_${GOOS}.go"; then
351 GO_LIBCALL_OS_FILE="go/syscall/libcall_${GOOS}.go"
353 if test -f "${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go"; then
354 GO_LIBCALL_OS_ARCH_FILE="go/syscall/libcall_${GOOS}_${GOARCH}.go"
356 if test -f "${srcdir}/go/syscall/syscall_${GOOS}.go"; then
357 GO_SYSCALL_OS_FILE="go/syscall/syscall_${GOOS}.go"
359 if test -f "${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go"; then
360 GO_SYSCALL_OS_ARCH_FILE="go/syscall/syscall_${GOOS}_${GOARCH}.go"
362 AC_SUBST(GO_LIBCALL_OS_FILE)
363 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
364 AC_SUBST(GO_SYSCALL_OS_FILE)
365 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
367 dnl Special flags used to generate sysinfo.go.
368 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
371 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
372 # msghdr in <sys/socket.h>.
373 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
375 *-*-solaris2.1[[01]])
376 # Solaris 10+ needs this so struct msghdr gets the msg_control
377 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
378 # above doesn't work with C99.
379 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
384 dnl Check if assembler supports disabling hardware capability support.
385 GCC_CHECK_ASSEMBLER_HWCAP
387 dnl Use -fsplit-stack when compiling C code if available.
388 AC_CACHE_CHECK([whether -fsplit-stack is supported],
389 [libgo_cv_c_split_stack_supported],
391 CFLAGS="$CFLAGS -fsplit-stack"
392 AC_COMPILE_IFELSE([[int i;]],
393 [libgo_cv_c_split_stack_supported=yes],
394 [libgo_cv_c_split_stack_supported=no])
395 CFLAGS=$CFLAGS_hold])
397 dnl Make sure the linker permits -fsplit-stack. Old versions of gold will
398 dnl reject split-stack code calling non-split-stack code on targets
399 dnl they don't support.
400 AC_CACHE_CHECK([whether linker supports split/non-split linked together],
401 [libgo_cv_c_linker_split_non_split],
402 [cat > conftest1.c << EOF
404 int main() { f(); return 0; }
406 cat > conftest2.c << EOF
409 $CC -c -fsplit-stack $CFLAGS $CPPFLAGS conftest1.c >/dev/null 2>&1
410 $CC -c $CFLAGS $CPPFLAGS conftest2.c > /dev/null 2>&1
411 if $CC -o conftest conftest1.$ac_objext conftest2.$ac_objext > /dev/null 2>&1; then
412 libgo_cv_c_linker_split_non_split=yes
414 libgo_cv_c_linker_split_non_split=no
416 rm -f conftest1.* conftest2.* conftest])
418 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes; then
419 SPLIT_STACK=-fsplit-stack
420 AC_DEFINE(USING_SPLIT_STACK, 1,
421 [Define if the compiler supports -fsplit-stack])
425 AC_SUBST(SPLIT_STACK)
426 AM_CONDITIONAL(USING_SPLIT_STACK,
427 test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes)
429 dnl If the compiler supports split-stack but the linker does not, then
430 dnl we need to explicitly disable split-stack for Go.
431 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = no; then
432 GO_SPLIT_STACK=-fno-split-stack
436 AC_SUBST(GO_SPLIT_STACK)
438 dnl Check whether the linker does stack munging when calling from
439 dnl split-stack into non-split-stack code. We check this by looking
440 dnl at the --help output. FIXME: This is only half right: it's
441 dnl possible for the linker to support this for some targets but not
443 dnl This is slightly different from the above check, which is whether
444 dnl the linker permits the call at all.
445 AC_CACHE_CHECK([whether linker supports split stack],
446 [libgo_cv_c_linker_supports_split_stack],
447 [libgo_cv_c_linker_supports_split_stack=no
448 if $GOC -Wl,--help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
449 libgo_cv_c_linker_supports_split_stack=yes
451 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
452 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
453 [Define if the linker support split stack adjustments])
456 AC_CACHE_CHECK([whether compiler is llgo],
457 [libgo_cv_c_goc_is_llgo],
458 [libgo_cv_c_goc_is_llgo=no
459 if $GOC -dumpversion 2>/dev/null | grep llgo >/dev/null 2>&1; then
460 libgo_cv_c_goc_is_llgo=yes
462 AM_CONDITIONAL(GOC_IS_LLGO, test "$libgo_cv_c_goc_is_llgo" = yes)
464 dnl Test for the -lm library.
466 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
469 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
470 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
471 [libgo_cv_lib_sockets=
473 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
474 if test "$libgo_check_socket" = "yes"; then
475 unset ac_cv_func_connect
476 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
477 libgo_check_both=yes)
479 if test "$libgo_check_both" = "yes"; then
481 LIBS="$LIBS -lsocket -lnsl"
482 unset ac_cv_func_accept
483 AC_CHECK_FUNC(accept,
485 libgo_cv_lib_sockets="-lsocket -lnsl"])
486 unset ac_cv_func_accept
489 unset ac_cv_func_gethostbyname
490 libgo_old_libs="$LIBS"
491 AC_CHECK_FUNC(gethostbyname, ,
492 [AC_CHECK_LIB(nsl, main,
493 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
494 unset ac_cv_func_gethostbyname
495 AC_CHECK_FUNC(sendfile, ,
496 [AC_CHECK_LIB(sendfile, main,
497 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lsendfile"])])
500 NET_LIBS="$libgo_cv_lib_sockets"
503 dnl Test whether the compiler supports the -pthread option.
504 AC_CACHE_CHECK([whether -pthread is supported],
505 [libgo_cv_lib_pthread],
507 CFLAGS="$CFLAGS -pthread -L../libatomic/.libs"
508 AC_COMPILE_IFELSE([[int i;]],
509 [libgo_cv_lib_pthread=yes],
510 [libgo_cv_lib_pthread=no])
511 CFLAGS=$CFLAGS_hold])
513 if test "$libgo_cv_lib_pthread" = yes; then
514 # RISC-V apparently adds -latomic when using -pthread.
515 PTHREAD_CFLAGS="-pthread -L../libatomic/.libs"
517 AC_SUBST(PTHREAD_CFLAGS)
519 dnl Test for the -lpthread library.
521 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
522 AC_SUBST(PTHREAD_LIBS)
524 dnl Test if -lrt is required for sched_yield or nanosleep or clock_gettime.
525 AC_SEARCH_LIBS([sched_yield], [rt])
526 AC_SEARCH_LIBS([nanosleep], [rt])
527 AC_SEARCH_LIBS([clock_gettime], [rt])
531 GCC_CHECK_UNWIND_GETIPINFO
533 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)
535 AC_CHECK_HEADERS([netinet/icmp6.h], [], [],
536 [#include <netinet/in.h>
539 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
540 [#ifdef HAVE_SYS_SOCKET_H
541 #include <sys/socket.h>
545 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
547 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv unsetenv dl_iterate_phdr memmem)
548 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
549 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
551 AC_CHECK_FUNCS(accept4 dup3 epoll_create1 faccessat fallocate fchmodat fchownat futimesat getxattr inotify_add_watch inotify_init inotify_init1 inotify_rm_watch listxattr mkdirat mknodat open64 openat pipe2 removexattr renameat setxattr sync_file_range splice syscall tee unlinkat unshare utimensat)
553 AC_CHECK_TYPES([loff_t])
557 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
560 CFLAGS_hold="$CFLAGS"
561 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
563 LIBS="$LIBS $PTHREAD_LIBS"
564 AC_CHECK_FUNCS(sem_timedwait)
565 CFLAGS="$CFLAGS_hold"
569 LIBS="$LIBS $MATH_LIBS"
570 AC_CHECK_FUNCS(matherr)
573 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4],
574 [libgo_cv_func___sync_bool_compare_and_swap_4],
576 typedef unsigned int uint32 __attribute__ ((mode (SI)));
578 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
580 [libgo_cv_func___sync_bool_compare_and_swap_4=yes],
581 [libgo_cv_func___sync_bool_compare_and_swap_4=no])])
582 if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then
583 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1,
584 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32])
587 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_8],
588 [libgo_cv_func___sync_bool_compare_and_swap_8],
590 typedef unsigned int uint64 __attribute__ ((mode (DI)));
592 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
594 [libgo_cv_func___sync_bool_compare_and_swap_8=yes],
595 [libgo_cv_func___sync_bool_compare_and_swap_8=no])])
596 if test "$libgo_cv_func___sync_bool_compare_and_swap_8" = "yes"; then
597 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_8, 1,
598 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint64])
601 AC_CACHE_CHECK([for __sync_fetch_and_add_4],
602 [libgo_cv_func___sync_fetch_and_add_4],
604 typedef unsigned int uint32 __attribute__ ((mode (SI)));
606 int main() { return __sync_fetch_and_add (&i, 1); }
608 [libgo_cv_func___sync_fetch_and_add_4=yes],
609 [libgo_cv_func___sync_fetch_and_add_4=no])])
610 if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then
611 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1,
612 [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32])
615 AC_CACHE_CHECK([for __sync_add_and_fetch_8],
616 [libgo_cv_func___sync_add_and_fetch_8],
618 typedef unsigned int uint64 __attribute__ ((mode (DI)));
620 int main() { return __sync_add_and_fetch (&i, 1); }
622 [libgo_cv_func___sync_add_and_fetch_8=yes],
623 [libgo_cv_func___sync_add_and_fetch_8=no])])
624 if test "$libgo_cv_func___sync_add_and_fetch_8" = "yes"; then
625 AC_DEFINE(HAVE_SYNC_ADD_AND_FETCH_8, 1,
626 [Define to 1 if the compiler provides the __sync_add_and_fetch function for uint64])
629 dnl For x86 we want to use the -minline-all-stringops option to avoid
630 dnl forcing a stack split when calling memcpy and friends.
631 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
632 [libgo_cv_c_stringops],
634 CFLAGS="$CFLAGS -minline-all-stringops"
635 AC_COMPILE_IFELSE([int i;],
636 [libgo_cv_c_stringops=yes],
637 [libgo_cv_c_stringops=no])
638 CFLAGS=$CFLAGS_hold])
640 if test "$libgo_cv_c_stringops" = yes; then
641 STRINGOPS_FLAG=-minline-all-stringops
643 AC_SUBST(STRINGOPS_FLAG)
645 dnl For x86 we want to compile the math library with -mfancy-math-387
646 dnl so that we can use the builtin instructions directly.
647 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
648 [libgo_cv_c_fancymath],
650 CFLAGS="$CFLAGS -mfancy-math-387"
651 AC_COMPILE_IFELSE([int i;],
652 [libgo_cv_c_fancymath=yes],
653 [libgo_cv_c_fancymath=no])
654 CFLAGS=$CFLAGS_hold])
656 if test "$libgo_cv_c_fancymath" = yes; then
657 MATH_FLAG="-mfancy-math-387"
659 MATH_FLAG="${MATH_FLAG} -ffp-contract=off -fno-math-errno -fno-trapping-math"
663 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
664 AC_CHECK_TYPES([off64_t])
667 dnl Work out the size of the epoll_events struct on GNU/Linux.
668 AC_CACHE_CHECK([epoll_event size],
669 [libgo_cv_c_epoll_event_size],
670 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
671 [sizeof (struct epoll_event)],
672 [#include <sys/epoll.h>],
673 [libgo_cv_c_epoll_event_size=0])])
674 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
675 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
677 dnl Work out the offset of the fd field in the epoll_events struct on
679 AC_CACHE_CHECK([epoll_event data.fd offset],
680 [libgo_cv_c_epoll_event_fd_offset],
681 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
682 [offsetof (struct epoll_event, data.fd)],
684 #include <sys/epoll.h>],
685 [libgo_cv_c_epoll_event_fd_offset=0])])
686 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
687 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
689 dnl Check if <sys/stat.h> uses timespec_t for st_?tim members. Introduced
690 dnl in Solaris 11.4 for XPG7 compatibility.
691 AC_EGREP_HEADER([timespec_t.*st_atim], [sys/stat.h],
692 [have_stat_timespec=yes], [have_stat_timespec=no])
693 AM_CONDITIONAL(HAVE_STAT_TIMESPEC, test $have_stat_timespec = yes)
695 dnl See if struct exception is defined in <math.h>.
696 AC_CHECK_TYPE([struct exception],
697 [libgo_has_struct_exception=yes],
698 [libgo_has_struct_exception=no],
700 if test "$libgo_has_struct_exception" = "yes"; then
701 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
702 [Define to 1 if <math.h> defines struct exception])
705 dnl See whether setcontext changes the value of TLS variables.
706 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
707 [libgo_cv_lib_setcontext_clobbers_tls],
708 [CFLAGS_hold="$CFLAGS"
709 CFLAGS="$PTHREAD_CFLAGS"
711 LIBS="$LIBS $PTHREAD_LIBS"
712 AC_CHECK_SIZEOF([void *])
713 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
718 #include <ucontext.h>
723 static char stack[[10 * 1024 * 1024]];
726 /* Called via makecontext/setcontext. */
734 /* Called via pthread_create. */
739 /* The thread should still see this value after calling
745 /* The call to setcontext should not return. */
754 /* The thread should not see this value. */
757 if (getcontext (&c) < 0)
760 c.uc_stack.ss_sp = stack;
761 #ifdef MAKECONTEXT_STACK_TOP
762 c.uc_stack.ss_sp += sizeof stack;
764 c.uc_stack.ss_flags = 0;
765 c.uc_stack.ss_size = sizeof stack;
767 makecontext (&c, cfn, 0);
769 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
772 if (pthread_join (tid, NULL) != 0)
775 /* The thread should have called exit. */
779 [libgo_cv_lib_setcontext_clobbers_tls=no],
780 [libgo_cv_lib_setcontext_clobbers_tls=yes],
781 [case "$target:$ptr_type_size" in
782 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
783 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
785 libgo_cv_lib_setcontext_clobbers_tls=no ;;
788 CFLAGS="$CFLAGS_hold"
791 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
792 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
793 [Define if setcontext clobbers TLS variables])
796 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
797 libgo_cv_ro_eh_frame, [
798 libgo_cv_ro_eh_frame=no
799 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
800 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
801 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
802 libgo_cv_ro_eh_frame=yes
803 elif grep '.section.*eh_frame.*#alloc' conftest.c \
804 | grep -v '#write' > /dev/null; then
805 libgo_cv_ro_eh_frame=yes
810 if test "x$libgo_cv_ro_eh_frame" = xyes; then
811 AC_DEFINE(EH_FRAME_FLAGS, "a",
812 [Define to the flags needed for the .section .eh_frame directive.])
814 AC_DEFINE(EH_FRAME_FLAGS, "aw",
815 [Define to the flags needed for the .section .eh_frame directive.])
818 AC_CACHE_CHECK([if compiler supports -Qunused-arguments],
819 [libgo_cv_c_unused_arguments],
821 CFLAGS="$CFLAGS -Qunused-arguments"
822 AC_COMPILE_IFELSE([[int i;]],
823 [libgo_cv_c_unused_arguments=yes],
824 [libgo_cv_c_unused_arguments=no])
825 CFLAGS=$CFLAGS_hold])
827 AC_CACHE_CHECK([if assembler supports GNU comdat group syntax],
828 libgo_cv_as_comdat_gnu, [
829 echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s
831 if test "$libgo_cv_c_unused_arguments" = yes; then
832 CFLAGS="$CFLAGS -Qunused-arguments"
834 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
835 libgo_cv_as_comdat_gnu=yes
837 libgo_cv_as_comdat_gnu=no
841 if test "x$libgo_cv_as_comdat_gnu" = xyes; then
842 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1,
843 [Define if your assembler supports GNU comdat group syntax.])
846 AC_CACHE_CHECK([assembler supports pc related relocs],
847 libgo_cv_as_x86_pcrel, [
848 libgo_cv_as_x86_pcrel=yes
849 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
851 if test "$libgo_cv_c_unused_arguments" = yes; then
852 CFLAGS="$CFLAGS -Qunused-arguments"
854 if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
855 libgo_cv_as_x86_pcrel=no
859 if test "x$libgo_cv_as_x86_pcrel" = xyes; then
860 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
861 [Define if your assembler supports PC relative relocs.])
864 AC_CACHE_CHECK([assembler supports unwind section type],
865 libgo_cv_as_x86_64_unwind_section_type, [
866 libgo_cv_as_x86_64_unwind_section_type=yes
867 echo '.section .eh_frame,"a",@unwind' > conftest.s
869 if test "$libgo_cv_c_unused_arguments" = yes; then
870 CFLAGS="$CFLAGS -Qunused-arguments"
872 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
873 libgo_cv_as_x86_64_unwind_section_type=no
877 if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then
878 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
879 [Define if your assembler supports unwind section type.])
882 AC_CACHE_CHECK([assembler supports AES instructions],
883 libgo_cv_as_x86_aes, [
884 libgo_cv_as_x86_aes=yes
885 echo 'aesenc %xmm0, %xmm1' > conftest.s
887 if test "$libgo_cv_c_unused_arguments" = yes; then
888 CFLAGS="$CFLAGS -Qunused-arguments"
890 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i error > /dev/null; then
891 libgo_cv_as_x86_aes=no
895 if test "x$libgo_cv_as_x86_aes" = xyes; then
896 AC_DEFINE(HAVE_AS_X86_AES, 1,
897 [Define if your assembler supports AES instructions.])
902 if test ${multilib} = yes; then
903 multilib_arg="--enable-multilib"
908 AC_CONFIG_FILES(Makefile testsuite/Makefile)
910 AC_CONFIG_COMMANDS([default],
911 [if test -n "$CONFIG_FILES"; then
912 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
913 # that multilib installs will end up installed in the correct place.
914 # The testsuite needs it for multilib-aware ABI baseline files.
915 # To work around this not being passed down from config-ml.in ->
916 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
917 # append it here. Only modify Makefiles that have just been created.
919 # Also, get rid of this simulated-VPATH thing that automake does.
921 s!`test -f '$<' || echo '$(srcdir)/'`!!
923 for i in $SUBDIRS; do
924 case $CONFIG_FILES in
926 #echo "Adding MULTISUBDIR to $i/Makefile"
927 sed -f vpsed $i/Makefile > tmp
928 grep '^MULTISUBDIR =' Makefile >> tmp
937 # Variables needed in config.status (file generation) which aren't already
938 # passed by autoconf.