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 ${host} below to set GOARCH
214 # - update goarchList in libgo/go/go/build/syslist.go
215 # - update goarch.sh to report the values for this architecture
216 # - update go-set-goarch in gcc/testsuite/go.test/go-test.exp
217 # - update ptrSizeMap and intSizeMap in libgo/go/cmd/cgo/main.go
218 # - update arch lists in libgo/match.sh
219 # - update arch lists in libgo/testsuite/gotest
220 # - update +build lines in several places
221 # - libgo/go/runtime/lfstack_NNbit.go
222 # - libgo/go/runtime/hashNN.go
223 # - libgo/go/runtime/unalignedN.go
224 # - libgo/go/syscall/endian_XX.go
226 # - possibly update files in libgo/go/internal/syscall/unix
227 ALLGOARCH="386 alpha amd64 amd64p32 arm armbe arm64 arm64be ia64 m68k mips mipsle mips64 mips64le mips64p32 mips64p32le ppc ppc64 ppc64le riscv64 s390 s390x sh shbe sparc sparc64"
229 # All known GOARCH family values.
230 ALLGOARCHFAMILY="I386 ALPHA AMD64 ARM ARM64 IA64 M68K MIPS MIPS64 PPC PPC64 RISCV64 S390 S390X SH SPARC SPARC64"
240 arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
249 i[34567]86-*-* | x86_64-*-*)
266 #if _MIPS_SIM != _ABIO32
271 #if _MIPS_SIM != _ABIN32
276 #if _MIPS_SIM != _ABI64
280 [AC_MSG_ERROR([unknown MIPS ABI])
281 [mips_abi="n32"]])])])
283 "o32") GOARCH=mips ;;
284 "n32") GOARCH=mips64p32 ;;
285 "n64") GOARCH=mips64 ;;
293 rs6000*-*-* | powerpc*-*-*)
301 #if defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN__)
312 #if defined(__s390x__)
318 sh3eb*-*-* | sh4eb*-*-*)
326 #if defined(__sparcv9) || defined(__arch64__)
335 AC_SUBST(ALLGOARCHFAMILY)
337 dnl Some files are only present when needed for specific architectures.
339 GO_LIBCALL_OS_ARCH_FILE=
341 GO_SYSCALL_OS_ARCH_FILE=
342 if test -f "${srcdir}/go/syscall/libcall_${GOOS}.go"; then
343 GO_LIBCALL_OS_FILE="go/syscall/libcall_${GOOS}.go"
345 if test -f "${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go"; then
346 GO_LIBCALL_OS_ARCH_FILE="go/syscall/libcall_${GOOS}_${GOARCH}.go"
348 if test -f "${srcdir}/go/syscall/syscall_${GOOS}.go"; then
349 GO_SYSCALL_OS_FILE="go/syscall/syscall_${GOOS}.go"
351 if test -f "${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go"; then
352 GO_SYSCALL_OS_ARCH_FILE="go/syscall/syscall_${GOOS}_${GOARCH}.go"
354 AC_SUBST(GO_LIBCALL_OS_FILE)
355 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
356 AC_SUBST(GO_SYSCALL_OS_FILE)
357 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
359 dnl Special flags used to generate sysinfo.go.
360 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
363 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
364 # msghdr in <sys/socket.h>.
365 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
367 *-*-solaris2.1[[01]])
368 # Solaris 10+ needs this so struct msghdr gets the msg_control
369 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
370 # above doesn't work with C99.
371 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
376 dnl Check if assembler supports disabling hardware capability support.
377 GCC_CHECK_ASSEMBLER_HWCAP
379 dnl Use -fsplit-stack when compiling C code if available.
380 AC_CACHE_CHECK([whether -fsplit-stack is supported],
381 [libgo_cv_c_split_stack_supported],
383 CFLAGS="$CFLAGS -fsplit-stack"
384 AC_COMPILE_IFELSE([[int i;]],
385 [libgo_cv_c_split_stack_supported=yes],
386 [libgo_cv_c_split_stack_supported=no])
387 CFLAGS=$CFLAGS_hold])
389 dnl Make sure the linker permits -fsplit-stack. Old versions of gold will
390 dnl reject split-stack code calling non-split-stack code on targets
391 dnl they don't support.
392 AC_CACHE_CHECK([whether linker supports split/non-split linked together],
393 [libgo_cv_c_linker_split_non_split],
394 [cat > conftest1.c << EOF
396 int main() { f(); return 0; }
398 cat > conftest2.c << EOF
401 $CC -c -fsplit-stack $CFLAGS $CPPFLAGS conftest1.c >/dev/null 2>&1
402 $CC -c $CFLAGS $CPPFLAGS conftest2.c > /dev/null 2>&1
403 if $CC -o conftest conftest1.$ac_objext conftest2.$ac_objext > /dev/null 2>&1; then
404 libgo_cv_c_linker_split_non_split=yes
406 libgo_cv_c_linker_split_non_split=no
408 rm -f conftest1.* conftest2.* conftest])
410 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes; then
411 SPLIT_STACK=-fsplit-stack
412 AC_DEFINE(USING_SPLIT_STACK, 1,
413 [Define if the compiler supports -fsplit-stack])
417 AC_SUBST(SPLIT_STACK)
418 AM_CONDITIONAL(USING_SPLIT_STACK,
419 test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes)
421 dnl If the compiler supports split-stack but the linker does not, then
422 dnl we need to explicitly disable split-stack for Go.
423 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = no; then
424 GO_SPLIT_STACK=-fno-split-stack
428 AC_SUBST(GO_SPLIT_STACK)
430 dnl Check whether the linker does stack munging when calling from
431 dnl split-stack into non-split-stack code. We check this by looking
432 dnl at the --help output. FIXME: This is only half right: it's
433 dnl possible for the linker to support this for some targets but not
435 dnl This is slightly different from the above check, which is whether
436 dnl the linker permits the call at all.
437 AC_CACHE_CHECK([whether linker supports split stack],
438 [libgo_cv_c_linker_supports_split_stack],
439 [libgo_cv_c_linker_supports_split_stack=no
440 if $GOC -Wl,--help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
441 libgo_cv_c_linker_supports_split_stack=yes
443 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
444 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
445 [Define if the linker support split stack adjustments])
448 AC_CACHE_CHECK([whether compiler is llgo],
449 [libgo_cv_c_goc_is_llgo],
450 [libgo_cv_c_goc_is_llgo=no
451 if $GOC -dumpversion 2>/dev/null | grep llgo >/dev/null 2>&1; then
452 libgo_cv_c_goc_is_llgo=yes
454 AM_CONDITIONAL(GOC_IS_LLGO, test "$libgo_cv_c_goc_is_llgo" = yes)
456 dnl Test for the -lm library.
458 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
461 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
462 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
463 [libgo_cv_lib_sockets=
465 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
466 if test "$libgo_check_socket" = "yes"; then
467 unset ac_cv_func_connect
468 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
469 libgo_check_both=yes)
471 if test "$libgo_check_both" = "yes"; then
473 LIBS="$LIBS -lsocket -lnsl"
474 unset ac_cv_func_accept
475 AC_CHECK_FUNC(accept,
477 libgo_cv_lib_sockets="-lsocket -lnsl"])
478 unset ac_cv_func_accept
481 unset ac_cv_func_gethostbyname
482 libgo_old_libs="$LIBS"
483 AC_CHECK_FUNC(gethostbyname, ,
484 [AC_CHECK_LIB(nsl, main,
485 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
486 unset ac_cv_func_gethostbyname
487 AC_CHECK_FUNC(sendfile, ,
488 [AC_CHECK_LIB(sendfile, main,
489 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lsendfile"])])
492 NET_LIBS="$libgo_cv_lib_sockets"
495 dnl Test whether the compiler supports the -pthread option.
496 AC_CACHE_CHECK([whether -pthread is supported],
497 [libgo_cv_lib_pthread],
499 CFLAGS="$CFLAGS -pthread -L../libatomic/.libs"
500 AC_COMPILE_IFELSE([[int i;]],
501 [libgo_cv_lib_pthread=yes],
502 [libgo_cv_lib_pthread=no])
503 CFLAGS=$CFLAGS_hold])
505 if test "$libgo_cv_lib_pthread" = yes; then
506 # RISC-V apparently adds -latomic when using -pthread.
507 PTHREAD_CFLAGS="-pthread -L../libatomic/.libs"
509 AC_SUBST(PTHREAD_CFLAGS)
511 dnl Test for the -lpthread library.
513 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
514 AC_SUBST(PTHREAD_LIBS)
516 dnl Test if -lrt is required for sched_yield or nanosleep or clock_gettime.
517 AC_SEARCH_LIBS([sched_yield], [rt])
518 AC_SEARCH_LIBS([nanosleep], [rt])
519 AC_SEARCH_LIBS([clock_gettime], [rt])
523 GCC_CHECK_UNWIND_GETIPINFO
525 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)
527 AC_CHECK_HEADERS([netinet/icmp6.h], [], [],
528 [#include <netinet/in.h>
531 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
532 [#ifdef HAVE_SYS_SOCKET_H
533 #include <sys/socket.h>
537 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
539 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv unsetenv dl_iterate_phdr)
540 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
541 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
543 AC_CHECK_FUNCS(accept4 dup3 epoll_create1 faccessat fallocate fchmodat fchownat futimesat getxattr inotify_add_watch inotify_init inotify_init1 inotify_rm_watch listxattr mkdirat mknodat open64 openat pipe2 removexattr renameat setxattr sync_file_range splice syscall tee unlinkat unshare utimensat)
545 AC_CHECK_TYPES([loff_t])
549 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
552 CFLAGS_hold="$CFLAGS"
553 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
555 LIBS="$LIBS $PTHREAD_LIBS"
556 AC_CHECK_FUNCS(sem_timedwait)
557 CFLAGS="$CFLAGS_hold"
561 LIBS="$LIBS $MATH_LIBS"
562 AC_CHECK_FUNCS(matherr)
565 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4],
566 [libgo_cv_func___sync_bool_compare_and_swap_4],
568 typedef unsigned int uint32 __attribute__ ((mode (SI)));
570 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
572 [libgo_cv_func___sync_bool_compare_and_swap_4=yes],
573 [libgo_cv_func___sync_bool_compare_and_swap_4=no])])
574 if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then
575 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1,
576 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32])
579 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_8],
580 [libgo_cv_func___sync_bool_compare_and_swap_8],
582 typedef unsigned int uint64 __attribute__ ((mode (DI)));
584 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
586 [libgo_cv_func___sync_bool_compare_and_swap_8=yes],
587 [libgo_cv_func___sync_bool_compare_and_swap_8=no])])
588 if test "$libgo_cv_func___sync_bool_compare_and_swap_8" = "yes"; then
589 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_8, 1,
590 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint64])
593 AC_CACHE_CHECK([for __sync_fetch_and_add_4],
594 [libgo_cv_func___sync_fetch_and_add_4],
596 typedef unsigned int uint32 __attribute__ ((mode (SI)));
598 int main() { return __sync_fetch_and_add (&i, 1); }
600 [libgo_cv_func___sync_fetch_and_add_4=yes],
601 [libgo_cv_func___sync_fetch_and_add_4=no])])
602 if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then
603 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1,
604 [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32])
607 AC_CACHE_CHECK([for __sync_add_and_fetch_8],
608 [libgo_cv_func___sync_add_and_fetch_8],
610 typedef unsigned int uint64 __attribute__ ((mode (DI)));
612 int main() { return __sync_add_and_fetch (&i, 1); }
614 [libgo_cv_func___sync_add_and_fetch_8=yes],
615 [libgo_cv_func___sync_add_and_fetch_8=no])])
616 if test "$libgo_cv_func___sync_add_and_fetch_8" = "yes"; then
617 AC_DEFINE(HAVE_SYNC_ADD_AND_FETCH_8, 1,
618 [Define to 1 if the compiler provides the __sync_add_and_fetch function for uint64])
621 dnl For x86 we want to use the -minline-all-stringops option to avoid
622 dnl forcing a stack split when calling memcpy and friends.
623 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
624 [libgo_cv_c_stringops],
626 CFLAGS="$CFLAGS -minline-all-stringops"
627 AC_COMPILE_IFELSE([int i;],
628 [libgo_cv_c_stringops=yes],
629 [libgo_cv_c_stringops=no])
630 CFLAGS=$CFLAGS_hold])
632 if test "$libgo_cv_c_stringops" = yes; then
633 STRINGOPS_FLAG=-minline-all-stringops
635 AC_SUBST(STRINGOPS_FLAG)
637 dnl For x86 we want to compile the math library with -mfancy-math-387
638 dnl so that we can use the builtin instructions directly.
639 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
640 [libgo_cv_c_fancymath],
642 CFLAGS="$CFLAGS -mfancy-math-387"
643 AC_COMPILE_IFELSE([int i;],
644 [libgo_cv_c_fancymath=yes],
645 [libgo_cv_c_fancymath=no])
646 CFLAGS=$CFLAGS_hold])
648 if test "$libgo_cv_c_fancymath" = yes; then
649 MATH_FLAG="-mfancy-math-387"
651 MATH_FLAG="${MATH_FLAG} -ffp-contract=off -fno-math-errno -fno-trapping-math"
655 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
656 AC_CHECK_TYPES([off64_t])
659 dnl Work out the size of the epoll_events struct on GNU/Linux.
660 AC_CACHE_CHECK([epoll_event size],
661 [libgo_cv_c_epoll_event_size],
662 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
663 [sizeof (struct epoll_event)],
664 [#include <sys/epoll.h>],
665 [libgo_cv_c_epoll_event_size=0])])
666 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
667 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
669 dnl Work out the offset of the fd field in the epoll_events struct on
671 AC_CACHE_CHECK([epoll_event data.fd offset],
672 [libgo_cv_c_epoll_event_fd_offset],
673 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
674 [offsetof (struct epoll_event, data.fd)],
676 #include <sys/epoll.h>],
677 [libgo_cv_c_epoll_event_fd_offset=0])])
678 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
679 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
681 dnl Check if <sys/stat.h> uses timespec_t for st_?tim members. Introduced
682 dnl in Solaris 11.4 for XPG7 compatibility.
683 AC_EGREP_HEADER([timespec_t.*st_atim], [sys/stat.h],
684 [have_stat_timespec=yes], [have_stat_timespec=no])
685 AM_CONDITIONAL(HAVE_STAT_TIMESPEC, test $have_stat_timespec = yes)
687 dnl See if struct exception is defined in <math.h>.
688 AC_CHECK_TYPE([struct exception],
689 [libgo_has_struct_exception=yes],
690 [libgo_has_struct_exception=no],
692 if test "$libgo_has_struct_exception" = "yes"; then
693 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
694 [Define to 1 if <math.h> defines struct exception])
697 dnl See whether setcontext changes the value of TLS variables.
698 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
699 [libgo_cv_lib_setcontext_clobbers_tls],
700 [CFLAGS_hold="$CFLAGS"
701 CFLAGS="$PTHREAD_CFLAGS"
703 LIBS="$LIBS $PTHREAD_LIBS"
704 AC_CHECK_SIZEOF([void *])
705 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
710 #include <ucontext.h>
715 static char stack[[10 * 1024 * 1024]];
718 /* Called via makecontext/setcontext. */
726 /* Called via pthread_create. */
731 /* The thread should still see this value after calling
737 /* The call to setcontext should not return. */
746 /* The thread should not see this value. */
749 if (getcontext (&c) < 0)
752 c.uc_stack.ss_sp = stack;
753 #ifdef MAKECONTEXT_STACK_TOP
754 c.uc_stack.ss_sp += sizeof stack;
756 c.uc_stack.ss_flags = 0;
757 c.uc_stack.ss_size = sizeof stack;
759 makecontext (&c, cfn, 0);
761 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
764 if (pthread_join (tid, NULL) != 0)
767 /* The thread should have called exit. */
771 [libgo_cv_lib_setcontext_clobbers_tls=no],
772 [libgo_cv_lib_setcontext_clobbers_tls=yes],
773 [case "$target:$ptr_type_size" in
774 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
775 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
777 libgo_cv_lib_setcontext_clobbers_tls=no ;;
780 CFLAGS="$CFLAGS_hold"
783 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
784 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
785 [Define if setcontext clobbers TLS variables])
788 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
789 libgo_cv_ro_eh_frame, [
790 libgo_cv_ro_eh_frame=no
791 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
792 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
793 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
794 libgo_cv_ro_eh_frame=yes
795 elif grep '.section.*eh_frame.*#alloc' conftest.c \
796 | grep -v '#write' > /dev/null; then
797 libgo_cv_ro_eh_frame=yes
802 if test "x$libgo_cv_ro_eh_frame" = xyes; then
803 AC_DEFINE(EH_FRAME_FLAGS, "a",
804 [Define to the flags needed for the .section .eh_frame directive.])
806 AC_DEFINE(EH_FRAME_FLAGS, "aw",
807 [Define to the flags needed for the .section .eh_frame directive.])
810 AC_CACHE_CHECK([if compiler supports -Qunused-arguments],
811 [libgo_cv_c_unused_arguments],
813 CFLAGS="$CFLAGS -Qunused-arguments"
814 AC_COMPILE_IFELSE([[int i;]],
815 [libgo_cv_c_unused_arguments=yes],
816 [libgo_cv_c_unused_arguments=no])
817 CFLAGS=$CFLAGS_hold])
819 AC_CACHE_CHECK([if assembler supports GNU comdat group syntax],
820 libgo_cv_as_comdat_gnu, [
821 echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s
823 if test "$libgo_cv_c_unused_arguments" = yes; then
824 CFLAGS="$CFLAGS -Qunused-arguments"
826 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
827 libgo_cv_as_comdat_gnu=yes
829 libgo_cv_as_comdat_gnu=no
833 if test "x$libgo_cv_as_comdat_gnu" = xyes; then
834 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1,
835 [Define if your assembler supports GNU comdat group syntax.])
838 AC_CACHE_CHECK([assembler supports pc related relocs],
839 libgo_cv_as_x86_pcrel, [
840 libgo_cv_as_x86_pcrel=yes
841 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
843 if test "$libgo_cv_c_unused_arguments" = yes; then
844 CFLAGS="$CFLAGS -Qunused-arguments"
846 if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
847 libgo_cv_as_x86_pcrel=no
851 if test "x$libgo_cv_as_x86_pcrel" = xyes; then
852 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
853 [Define if your assembler supports PC relative relocs.])
856 AC_CACHE_CHECK([assembler supports unwind section type],
857 libgo_cv_as_x86_64_unwind_section_type, [
858 libgo_cv_as_x86_64_unwind_section_type=yes
859 echo '.section .eh_frame,"a",@unwind' > conftest.s
861 if test "$libgo_cv_c_unused_arguments" = yes; then
862 CFLAGS="$CFLAGS -Qunused-arguments"
864 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
865 libgo_cv_as_x86_64_unwind_section_type=no
869 if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then
870 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
871 [Define if your assembler supports unwind section type.])
874 AC_CACHE_CHECK([assembler supports AES instructions],
875 libgo_cv_as_x86_aes, [
876 libgo_cv_as_x86_aes=yes
877 echo 'aesenc %xmm0, %xmm1' > conftest.s
879 if test "$libgo_cv_c_unused_arguments" = yes; then
880 CFLAGS="$CFLAGS -Qunused-arguments"
882 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i error > /dev/null; then
883 libgo_cv_as_x86_aes=no
887 if test "x$libgo_cv_as_x86_aes" = xyes; then
888 AC_DEFINE(HAVE_AS_X86_AES, 1,
889 [Define if your assembler supports AES instructions.])
894 if test ${multilib} = yes; then
895 multilib_arg="--enable-multilib"
900 AC_CONFIG_FILES(Makefile testsuite/Makefile)
902 AC_CONFIG_COMMANDS([default],
903 [if test -n "$CONFIG_FILES"; then
904 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
905 # that multilib installs will end up installed in the correct place.
906 # The testsuite needs it for multilib-aware ABI baseline files.
907 # To work around this not being passed down from config-ml.in ->
908 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
909 # append it here. Only modify Makefiles that have just been created.
911 # Also, get rid of this simulated-VPATH thing that automake does.
913 s!`test -f '$<' || echo '$(srcdir)/'`!!
915 for i in $SUBDIRS; do
916 case $CONFIG_FILES in
918 #echo "Adding MULTISUBDIR to $i/Makefile"
919 sed -f vpsed $i/Makefile > tmp
920 grep '^MULTISUBDIR =' Makefile >> tmp
929 # Variables needed in config.status (file generation) which aren't already
930 # passed by autoconf.