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)
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])
38 AC_CHECK_TOOL(OBJCOPY, objcopy, missing-objcopy)
42 AC_SUBST(enable_shared)
43 AC_SUBST(enable_static)
45 CC_FOR_BUILD=${CC_FOR_BUILD:-gcc}
46 AC_SUBST(CC_FOR_BUILD)
50 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
53 AC_ARG_ENABLE(werror, [AS_HELP_STRING([--enable-werror],
54 [turns on -Werror @<:@default=yes@:>@])])
55 if test "x$enable_werror" != "xno"; then
61 glibgo_toolexeclibdir=no
63 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
64 AC_ARG_ENABLE([version-specific-runtime-libs],
65 AC_HELP_STRING([--enable-version-specific-runtime-libs],
66 [Specify that runtime libraries should be installed in a compiler-specific directory]),
68 yes) version_specific_libs=yes ;;
69 no) version_specific_libs=no ;;
70 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
72 [version_specific_libs=no])
73 AC_MSG_RESULT($version_specific_libs)
75 # Version-specific runtime libs processing.
76 if test $version_specific_libs = yes; then
77 glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
78 glibgo_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
81 # Calculate glibgo_toolexecdir, glibgo_toolexeclibdir
82 # Install a library built with a cross compiler in tooldir, not libdir.
83 if test -n "$with_cross_host" &&
84 test x"$with_cross_host" != x"no"; then
85 nover_glibgo_toolexecdir='${exec_prefix}/${host_alias}'
86 nover_glibgo_toolexeclibdir='${toolexecdir}/lib'
88 nover_glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
89 nover_glibgo_toolexeclibdir='${libdir}'
91 multi_os_directory=`$GOC -print-multi-os-directory`
92 case $multi_os_directory in
93 .) ;; # Avoid trailing /.
94 *) nover_glibgo_toolexeclibdir=${nover_glibgo_toolexeclibdir}/${multi_os_directory} ;;
97 if test x"$glibgo_toolexecdir" = x"no"; then
98 glibgo_toolexecdir="${nover_glibgo_toolexecdir}"
99 glibgo_toolexeclibdir="${nover_glibgo_toolexeclibdir}"
102 AC_SUBST(glibgo_toolexecdir)
103 AC_SUBST(glibgo_toolexeclibdir)
104 AC_SUBST(nover_glibgo_toolexeclibdir)
106 # See if the user wants to configure without libffi. Some
107 # architectures don't support it. FIXME: We should set a default
110 AS_HELP_STRING([--without-libffi],
113 [with_libffi=${with_libffi_default-yes}])
117 if test "$with_libffi" != no; then
118 AC_DEFINE(USE_LIBFFI, 1, [Define if we're to use libffi.])
119 LIBFFI=../libffi/libffi_convenience.la
120 LIBFFIINCS='-I$(top_srcdir)/../libffi/include -I../libffi/include'
125 # See if the user wants to configure without libatomic. This is useful if we are
126 # on an architecture for which libgo does not need an atomic support library and
127 # libatomic does not support our C compiler.
128 AC_ARG_WITH(libatomic,
129 AS_HELP_STRING([--without-libatomic],
130 [don't use libatomic]),
132 [with_libatomic=${with_libatomic_default-yes}])
135 if test "$with_libatomic" != no; then
136 LIBATOMIC=../libatomic/libatomic_convenience.la
140 # Used to tell GNU make to include a file without telling automake to
142 go_include="-include"
156 *-*-darwin*) is_darwin=yes; GOOS=darwin ;;
157 *-*-freebsd*) is_freebsd=yes; GOOS=freebsd ;;
158 *-*-irix6*) is_irix=yes; GOOS=irix ;;
159 *-*-linux*) is_linux=yes; GOOS=linux ;;
160 *-*-netbsd*) is_netbsd=yes; GOOS=netbsd ;;
161 *-*-openbsd*) is_openbsd=yes; GOOS=openbsd ;;
162 *-*-dragonfly*) is_dragonfly=yes; GOOS=dragonfly ;;
163 *-*-rtems*) is_rtems=yes; GOOS=rtems ;;
164 *-*-solaris2*) is_solaris=yes; GOOS=solaris ;;
166 AM_CONDITIONAL(LIBGO_IS_DARWIN, test $is_darwin = yes)
167 AM_CONDITIONAL(LIBGO_IS_FREEBSD, test $is_freebsd = yes)
168 AM_CONDITIONAL(LIBGO_IS_IRIX, test $is_irix = yes)
169 AM_CONDITIONAL(LIBGO_IS_LINUX, test $is_linux = yes)
170 AM_CONDITIONAL(LIBGO_IS_NETBSD, test $is_netbsd = yes)
171 AM_CONDITIONAL(LIBGO_IS_OPENBSD, test $is_openbsd = yes)
172 AM_CONDITIONAL(LIBGO_IS_DRAGONFLY, test $is_dragonfly = yes)
173 AM_CONDITIONAL(LIBGO_IS_RTEMS, test $is_rtems = yes)
174 AM_CONDITIONAL(LIBGO_IS_SOLARIS, test $is_solaris = yes)
177 dnl Test whether we need to use DejaGNU or whether we can use the
178 dnl simpler gotest approach. We can only use gotest for a native
182 *-*-rtems*) USE_DEJAGNU=yes ;;
184 *) USE_DEJAGNU=yes ;;
186 AC_SUBST(USE_DEJAGNU)
188 dnl N.B. Keep in sync with gcc/testsuite/go.test/go-test.exp (go-set-goarch).
213 arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
218 i[34567]86-*-* | x86_64-*-*)
224 [is_386=yes], [is_x86_64=yes])
225 if test "$is_386" = "yes"; then
237 #if _MIPS_SIM != _ABIO32
242 #if _MIPS_SIM != _ABIN32
247 #if _MIPS_SIM != _ABI64
252 #if _MIPS_SIM != _ABIO64
256 [AC_MSG_ERROR([unknown MIPS ABI])
257 [mips_abi="n32"]])])])])
259 "o32") GOARCH=mipso32 ;;
260 "n32") GOARCH=mipsn32 ;;
261 "n64") GOARCH=mipsn64 ;;
262 "o64") GOARCH=mipso64 ;;
265 rs6000*-*-* | powerpc*-*-*)
272 #if defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN__)
275 [is_ppc64le=yes],[is_ppc64=yes])])
276 if test "$is_ppc" = "yes"; then
278 elif test "$is_ppc64" = "yes"; then
286 #if defined(__s390x__)
289 [is_s390=yes], [is_s390x=yes])
290 if test "$is_s390" = "yes"; then
298 #if defined(__sparcv9) || defined(__arch64__)
301 [is_sparc=yes], [is_sparc64=yes])
302 if test "$is_sparc" = "yes"; then
309 AM_CONDITIONAL(LIBGO_IS_386, test $is_386 = yes)
310 AM_CONDITIONAL(LIBGO_IS_ALPHA, test $is_alpha = yes)
311 AM_CONDITIONAL(LIBGO_IS_ARM, test $is_arm = yes)
312 AM_CONDITIONAL(LIBGO_IS_ARM64, test $is_arm64 = yes)
313 AM_CONDITIONAL(LIBGO_IS_M68K, test $is_m68k = yes)
314 AM_CONDITIONAL(LIBGO_IS_MIPS, test $mips_abi != unknown)
315 AM_CONDITIONAL(LIBGO_IS_MIPSO32, test $mips_abi = o32)
316 AM_CONDITIONAL(LIBGO_IS_MIPSN32, test $mips_abi = n32)
317 AM_CONDITIONAL(LIBGO_IS_MIPSN64, test $mips_abi = n64)
318 AM_CONDITIONAL(LIBGO_IS_MIPSO64, test $mips_abi = o64)
319 AM_CONDITIONAL(LIBGO_IS_PPC, test $is_ppc = yes)
320 AM_CONDITIONAL(LIBGO_IS_PPC64, test $is_ppc64 = yes)
321 AM_CONDITIONAL(LIBGO_IS_PPC64LE, test $is_ppc64le = yes)
322 AM_CONDITIONAL(LIBGO_IS_S390, test $is_s390 = yes)
323 AM_CONDITIONAL(LIBGO_IS_S390X, test $is_s390x = yes)
324 AM_CONDITIONAL(LIBGO_IS_SPARC, test $is_sparc = yes)
325 AM_CONDITIONAL(LIBGO_IS_SPARC64, test $is_sparc64 = yes)
326 AM_CONDITIONAL(LIBGO_IS_X86_64, test $is_x86_64 = yes)
329 dnl Some files are only present when needed for specific architectures.
331 GO_LIBCALL_OS_ARCH_FILE=
333 GO_SYSCALL_OS_ARCH_FILE=
334 if test -f "${srcdir}/go/syscall/libcall_${GOOS}.go"; then
335 GO_LIBCALL_OS_FILE="go/syscall/libcall_${GOOS}.go"
337 if test -f "${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go"; then
338 GO_LIBCALL_OS_ARCH_FILE="go/syscall/libcall_${GOOS}_${GOARCH}.go"
340 if test -f "${srcdir}/go/syscall/syscall_${GOOS}.go"; then
341 GO_SYSCALL_OS_FILE="go/syscall/syscall_${GOOS}.go"
343 if test -f "${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go"; then
344 GO_SYSCALL_OS_ARCH_FILE="go/syscall/syscall_${GOOS}_${GOARCH}.go"
346 AC_SUBST(GO_LIBCALL_OS_FILE)
347 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
348 AC_SUBST(GO_SYSCALL_OS_FILE)
349 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
351 dnl Special flags used to generate sysinfo.go.
352 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
355 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
356 # msghdr in <sys/socket.h>.
357 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
359 *-*-solaris2.1[[01]])
360 # Solaris 10+ needs this so struct msghdr gets the msg_control
361 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
362 # above doesn't work with C99.
363 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
368 dnl Use -fsplit-stack when compiling C code if available.
369 AC_CACHE_CHECK([whether -fsplit-stack is supported],
370 [libgo_cv_c_split_stack_supported],
372 CFLAGS="$CFLAGS -fsplit-stack"
373 AC_COMPILE_IFELSE([[int i;]],
374 [libgo_cv_c_split_stack_supported=yes],
375 [libgo_cv_c_split_stack_supported=no])
376 CFLAGS=$CFLAGS_hold])
378 dnl Make sure the linker permits -fsplit-stack. Old versions of gold will
379 dnl reject split-stack code calling non-split-stack code on targets
380 dnl they don't support.
381 AC_CACHE_CHECK([whether linker supports split/non-split linked together],
382 [libgo_cv_c_linker_split_non_split],
383 [cat > conftest1.c << EOF
385 int main() { f(); return 0; }
387 cat > conftest2.c << EOF
390 $CC -c -fsplit-stack $CFLAGS $CPPFLAGS conftest1.c
391 $CC -c $CFLAGS $CPPFLAGS conftest2.c
392 if $CC -o conftest conftest1.$ac_objext conftest2.$ac_objext; then
393 libgo_cv_c_linker_split_non_split=yes
395 libgo_cv_c_linker_split_non_split=no
397 rm -f conftest1.* conftest2.* conftest])
399 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes; then
400 SPLIT_STACK=-fsplit-stack
401 AC_DEFINE(USING_SPLIT_STACK, 1,
402 [Define if the compiler supports -fsplit-stack])
406 AC_SUBST(SPLIT_STACK)
407 AM_CONDITIONAL(USING_SPLIT_STACK,
408 test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = yes)
410 dnl If the compiler supports split-stack but the linker does not, then
411 dnl we need to explicitly disable split-stack for Go.
412 if test "$libgo_cv_c_split_stack_supported" = yes -a "$libgo_cv_c_linker_split_non_split" = no; then
413 GO_SPLIT_STACK=-fno-split-stack
417 AC_SUBST(GO_SPLIT_STACK)
419 dnl Check whether the linker does stack munging when calling from
420 dnl split-stack into non-split-stack code. We check this by looking
421 dnl at the --help output. FIXME: This is only half right: it's
422 dnl possible for the linker to support this for some targets but not
424 dnl This is slightly different from the above check, which is whether
425 dnl the linker permits the call at all.
426 AC_CACHE_CHECK([whether linker supports split stack],
427 [libgo_cv_c_linker_supports_split_stack],
428 [libgo_cv_c_linker_supports_split_stack=no
429 if $GOC -Wl,--help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
430 libgo_cv_c_linker_supports_split_stack=yes
432 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
433 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
434 [Define if the linker support split stack adjustments])
437 AC_CACHE_CHECK([whether compiler is llgo],
438 [libgo_cv_c_goc_is_llgo],
439 [libgo_cv_c_goc_is_llgo=no
440 if $GOC -dumpversion 2>/dev/null | grep llgo >/dev/null 2>&1; then
441 libgo_cv_c_goc_is_llgo=yes
443 AM_CONDITIONAL(GOC_IS_LLGO, test "$libgo_cv_c_goc_is_llgo" = yes)
445 dnl Test for the -lm library.
447 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
450 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
451 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
452 [libgo_cv_lib_sockets=
454 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
455 if test "$libgo_check_socket" = "yes"; then
456 unset ac_cv_func_connect
457 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
458 libgo_check_both=yes)
460 if test "$libgo_check_both" = "yes"; then
462 LIBS="$LIBS -lsocket -lnsl"
463 unset ac_cv_func_accept
464 AC_CHECK_FUNC(accept,
466 libgo_cv_lib_sockets="-lsocket -lnsl"])
467 unset ac_cv_func_accept
470 unset ac_cv_func_gethostbyname
471 libgo_old_libs="$LIBS"
472 AC_CHECK_FUNC(gethostbyname, ,
473 [AC_CHECK_LIB(nsl, main,
474 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
475 unset ac_cv_func_gethostbyname
478 NET_LIBS="$libgo_cv_lib_sockets"
481 dnl Test whether the compiler supports the -pthread option.
482 AC_CACHE_CHECK([whether -pthread is supported],
483 [libgo_cv_lib_pthread],
485 CFLAGS="$CFLAGS -pthread"
486 AC_COMPILE_IFELSE([[int i;]],
487 [libgo_cv_lib_pthread=yes],
488 [libgo_cv_lib_pthread=no])
489 CFLAGS=$CFLAGS_hold])
491 if test "$libgo_cv_lib_pthread" = yes; then
492 PTHREAD_CFLAGS=-pthread
494 AC_SUBST(PTHREAD_CFLAGS)
496 dnl Test for the -lpthread library.
498 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
499 AC_SUBST(PTHREAD_LIBS)
501 dnl Test if -lrt is required for sched_yield and/or nanosleep.
502 AC_SEARCH_LIBS([sched_yield], [rt])
503 AC_SEARCH_LIBS([nanosleep], [rt])
507 GCC_CHECK_UNWIND_GETIPINFO
509 AC_CHECK_HEADERS(sched.h sys/file.h sys/mman.h syscall.h sys/epoll.h sys/inotify.h sys/ptrace.h sys/syscall.h sys/user.h sys/utsname.h sys/select.h sys/socket.h net/if.h net/if_arp.h net/route.h netpacket/packet.h sys/prctl.h sys/mount.h sys/vfs.h sys/statfs.h sys/timex.h sys/sysinfo.h utime.h linux/ether.h linux/fs.h linux/reboot.h netinet/icmp6.h netinet/in_syst.h netinet/ip.h netinet/ip_mroute.h netinet/if_ether.h)
511 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
512 [#ifdef HAVE_SYS_SOCKET_H
513 #include <sys/socket.h>
517 AC_CACHE_CHECK([whether <ustat.h> can be used],
518 [libgo_cv_c_ustat_h],
520 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE $OSCFLAGS"
523 #include <sys/types.h>
524 #ifdef HAVE_LINUX_FILTER_H
525 #include <linux/filter.h>
528 ])], [libgo_cv_c_ustat_h=yes], [libgo_cv_c_ustat_h=no])
529 CFLAGS=$CFLAGS_hold])
530 if test $libgo_cv_c_ustat_h = yes; then
531 AC_DEFINE(HAVE_USTAT_H, 1,
532 [Define to 1 if you have the <ustat.h> header file and it works.])
535 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
537 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv unsetenv dl_iterate_phdr)
538 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
539 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
541 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 tee unlinkat unshare utimensat)
543 AC_CHECK_TYPES([loff_t])
547 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
550 CFLAGS_hold="$CFLAGS"
551 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
553 LIBS="$LIBS $PTHREAD_LIBS"
554 AC_CHECK_FUNCS(sem_timedwait)
555 CFLAGS="$CFLAGS_hold"
559 LIBS="$LIBS $MATH_LIBS"
560 AC_CHECK_FUNCS(matherr)
563 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4],
564 [libgo_cv_func___sync_bool_compare_and_swap_4],
566 typedef unsigned int uint32 __attribute__ ((mode (SI)));
568 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
570 [libgo_cv_func___sync_bool_compare_and_swap_4=yes],
571 [libgo_cv_func___sync_bool_compare_and_swap_4=no])])
572 if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then
573 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1,
574 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32])
577 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_8],
578 [libgo_cv_func___sync_bool_compare_and_swap_8],
580 typedef unsigned int uint64 __attribute__ ((mode (DI)));
582 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
584 [libgo_cv_func___sync_bool_compare_and_swap_8=yes],
585 [libgo_cv_func___sync_bool_compare_and_swap_8=no])])
586 if test "$libgo_cv_func___sync_bool_compare_and_swap_8" = "yes"; then
587 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_8, 1,
588 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint64])
591 AC_CACHE_CHECK([for __sync_fetch_and_add_4],
592 [libgo_cv_func___sync_fetch_and_add_4],
594 typedef unsigned int uint32 __attribute__ ((mode (SI)));
596 int main() { return __sync_fetch_and_add (&i, 1); }
598 [libgo_cv_func___sync_fetch_and_add_4=yes],
599 [libgo_cv_func___sync_fetch_and_add_4=no])])
600 if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then
601 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1,
602 [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32])
605 AC_CACHE_CHECK([for __sync_add_and_fetch_8],
606 [libgo_cv_func___sync_add_and_fetch_8],
608 typedef unsigned int uint64 __attribute__ ((mode (DI)));
610 int main() { return __sync_add_and_fetch (&i, 1); }
612 [libgo_cv_func___sync_add_and_fetch_8=yes],
613 [libgo_cv_func___sync_add_and_fetch_8=no])])
614 if test "$libgo_cv_func___sync_add_and_fetch_8" = "yes"; then
615 AC_DEFINE(HAVE_SYNC_ADD_AND_FETCH_8, 1,
616 [Define to 1 if the compiler provides the __sync_add_and_fetch function for uint64])
619 dnl For x86 we want to use the -minline-all-stringops option to avoid
620 dnl forcing a stack split when calling memcpy and friends.
621 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
622 [libgo_cv_c_stringops],
624 CFLAGS="$CFLAGS -minline-all-stringops"
625 AC_COMPILE_IFELSE([int i;],
626 [libgo_cv_c_stringops=yes],
627 [libgo_cv_c_stringops=no])
628 CFLAGS=$CFLAGS_hold])
630 if test "$libgo_cv_c_stringops" = yes; then
631 STRINGOPS_FLAG=-minline-all-stringops
633 AC_SUBST(STRINGOPS_FLAG)
635 dnl For x86 we want to compile the math library with -mfancy-math-387
636 dnl -funsafe-math-optimizations so that we can use the builtin
637 dnl instructions directly.
638 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
639 [libgo_cv_c_fancymath],
641 CFLAGS="$CFLAGS -mfancy-math-387"
642 AC_COMPILE_IFELSE([int i;],
643 [libgo_cv_c_fancymath=yes],
644 [libgo_cv_c_fancymath=no])
645 CFLAGS=$CFLAGS_hold])
647 if test "$libgo_cv_c_fancymath" = yes; then
648 MATH_FLAG="-mfancy-math-387 -funsafe-math-optimizations"
650 MATH_FLAG="-ffp-contract=off"
655 CFLAGS="$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 12 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.])
876 if test ${multilib} = yes; then
877 multilib_arg="--enable-multilib"
882 AC_CONFIG_FILES(Makefile testsuite/Makefile)
884 AC_CONFIG_COMMANDS([default],
885 [if test -n "$CONFIG_FILES"; then
886 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
887 # that multilib installs will end up installed in the correct place.
888 # The testsuite needs it for multilib-aware ABI baseline files.
889 # To work around this not being passed down from config-ml.in ->
890 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
891 # append it here. Only modify Makefiles that have just been created.
893 # Also, get rid of this simulated-VPATH thing that automake does.
895 s!`test -f '$<' || echo '$(srcdir)/'`!!
897 for i in $SUBDIRS; do
898 case $CONFIG_FILES in
900 #echo "Adding MULTISUBDIR to $i/Makefile"
901 sed -f vpsed $i/Makefile > tmp
902 grep '^MULTISUBDIR =' Makefile >> tmp
911 # Variables needed in config.status (file generation) which aren't already
912 # passed by autoconf.