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=`$CC -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 # Used to tell GNU make to include a file without telling automake to
127 go_include="-include"
141 *-*-darwin*) is_darwin=yes; GOOS=darwin ;;
142 *-*-freebsd*) is_freebsd=yes; GOOS=freebsd ;;
143 *-*-irix6*) is_irix=yes; GOOS=irix ;;
144 *-*-linux*) is_linux=yes; GOOS=linux ;;
145 *-*-netbsd*) is_netbsd=yes; GOOS=netbsd ;;
146 *-*-openbsd*) is_openbsd=yes; GOOS=openbsd ;;
147 *-*-dragonfly*) is_dragonfly=yes; GOOS=dragonfly ;;
148 *-*-rtems*) is_rtems=yes; GOOS=rtems ;;
149 *-*-solaris2*) is_solaris=yes; GOOS=solaris ;;
151 AM_CONDITIONAL(LIBGO_IS_DARWIN, test $is_darwin = yes)
152 AM_CONDITIONAL(LIBGO_IS_FREEBSD, test $is_freebsd = yes)
153 AM_CONDITIONAL(LIBGO_IS_IRIX, test $is_irix = yes)
154 AM_CONDITIONAL(LIBGO_IS_LINUX, test $is_linux = yes)
155 AM_CONDITIONAL(LIBGO_IS_NETBSD, test $is_netbsd = yes)
156 AM_CONDITIONAL(LIBGO_IS_OPENBSD, test $is_openbsd = yes)
157 AM_CONDITIONAL(LIBGO_IS_DRAGONFLY, test $is_dragonfly = yes)
158 AM_CONDITIONAL(LIBGO_IS_RTEMS, test $is_rtems = yes)
159 AM_CONDITIONAL(LIBGO_IS_SOLARIS, test $is_solaris = yes)
162 dnl Test whether we need to use DejaGNU or whether we can use the
163 dnl simpler gotest approach. We can only use gotest for a native
167 *-*-rtems*) USE_DEJAGNU=yes ;;
169 *) USE_DEJAGNU=yes ;;
171 AC_SUBST(USE_DEJAGNU)
173 dnl N.B. Keep in sync with gcc/testsuite/go.test/go-test.exp (go-set-goarch).
190 arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
195 i[34567]86-*-* | x86_64-*-*)
201 [is_386=yes], [is_x86_64=yes])
202 if test "$is_386" = "yes"; then
214 #if _MIPS_SIM != _ABIO32
219 #if _MIPS_SIM != _ABIN32
224 #if _MIPS_SIM != _ABI64
229 #if _MIPS_SIM != _ABIO64
233 [AC_MSG_ERROR([unknown MIPS ABI])
234 [mips_abi="n32"]])])])])
236 "o32") GOARCH=mipso32 ;;
237 "n32") GOARCH=mipsn32 ;;
238 "n64") GOARCH=mipsn64 ;;
239 "o64") GOARCH=mipso64 ;;
242 rs6000*-*-* | powerpc*-*-*)
247 [is_ppc=yes], [is_ppc64=yes])
248 if test "$is_ppc" = "yes"; then
256 #if defined(__sparcv9) || defined(__arch64__)
259 [is_sparc=yes], [is_sparc64=yes])
260 if test "$is_sparc" = "yes"; then
267 AM_CONDITIONAL(LIBGO_IS_386, test $is_386 = yes)
268 AM_CONDITIONAL(LIBGO_IS_ALPHA, test $is_alpha = yes)
269 AM_CONDITIONAL(LIBGO_IS_ARM, test $is_arm = yes)
270 AM_CONDITIONAL(LIBGO_IS_M68K, test $is_m68k = yes)
271 AM_CONDITIONAL(LIBGO_IS_MIPS, test $mips_abi != unknown)
272 AM_CONDITIONAL(LIBGO_IS_MIPSO32, test $mips_abi = o32)
273 AM_CONDITIONAL(LIBGO_IS_MIPSN32, test $mips_abi = n32)
274 AM_CONDITIONAL(LIBGO_IS_MIPSN64, test $mips_abi = n64)
275 AM_CONDITIONAL(LIBGO_IS_MIPSO64, test $mips_abi = o64)
276 AM_CONDITIONAL(LIBGO_IS_PPC, test $is_ppc = yes)
277 AM_CONDITIONAL(LIBGO_IS_PPC64, test $is_ppc64 = yes)
278 AM_CONDITIONAL(LIBGO_IS_SPARC, test $is_sparc = yes)
279 AM_CONDITIONAL(LIBGO_IS_SPARC64, test $is_sparc64 = yes)
280 AM_CONDITIONAL(LIBGO_IS_X86_64, test $is_x86_64 = yes)
283 dnl Some files are only present when needed for specific architectures.
285 GO_LIBCALL_OS_ARCH_FILE=
287 GO_SYSCALL_OS_ARCH_FILE=
288 if test -f ${srcdir}/go/syscall/libcall_${GOOS}.go; then
289 GO_LIBCALL_OS_FILE=go/syscall/libcall_${GOOS}.go
291 if test -f ${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go; then
292 GO_LIBCALL_OS_ARCH_FILE=go/syscall/libcall_${GOOS}_${GOARCH}.go
294 if test -f ${srcdir}/go/syscall/syscall_${GOOS}.go; then
295 GO_SYSCALL_OS_FILE=go/syscall/syscall_${GOOS}.go
297 if test -f ${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go; then
298 GO_SYSCALL_OS_ARCH_FILE=go/syscall/syscall_${GOOS}_${GOARCH}.go
300 AC_SUBST(GO_LIBCALL_OS_FILE)
301 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
302 AC_SUBST(GO_SYSCALL_OS_FILE)
303 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
305 dnl Special flags used to generate sysinfo.go.
306 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
309 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
310 # msghdr in <sys/socket.h>.
311 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
314 # Solaris 8/9 need this so struct msghdr gets the msg_control
315 # etc. fields in <sys/socket.h> (_XPG4_2).
316 OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500 -D_XOPEN_SOURCE_EXTENDED -D__EXTENSIONS__"
318 *-*-solaris2.1[[01]])
319 # Solaris 10+ needs this so struct msghdr gets the msg_control
320 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=600 as
321 # above doesn't work with C99.
322 OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
327 dnl Use -fsplit-stack when compiling C code if available.
328 AC_CACHE_CHECK([whether -fsplit-stack is supported],
329 [libgo_cv_c_split_stack_supported],
331 CFLAGS="$CFLAGS -fsplit-stack"
332 AC_COMPILE_IFELSE([[int i;]],
333 [libgo_cv_c_split_stack_supported=yes],
334 [libgo_cv_c_split_stack_supported=no])
335 CFLAGS=$CFLAGS_hold])
336 if test "$libgo_cv_c_split_stack_supported" = yes; then
337 SPLIT_STACK=-fsplit-stack
338 AC_DEFINE(USING_SPLIT_STACK, 1,
339 [Define if the compiler supports -fsplit-stack])
343 AC_SUBST(SPLIT_STACK)
344 AM_CONDITIONAL(USING_SPLIT_STACK,
345 test "$libgo_cv_c_split_stack_supported" = yes)
347 dnl Check whether the linker does stack munging when calling from
348 dnl split-stack into non-split-stack code. We check this by looking
349 dnl at the --help output. FIXME: This is only half right: it's
350 dnl possible for the linker to support this for some targets but not
352 AC_CACHE_CHECK([whether linker supports split stack],
353 [libgo_cv_c_linker_supports_split_stack],
354 libgo_cv_c_linker_supports_split_stack=no
355 if $LD --help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
356 libgo_cv_c_linker_supports_split_stack=yes
358 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
359 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
360 [Define if the linker support split stack adjustments])
363 dnl Test for the -lm library.
365 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
368 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
369 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
370 [libgo_cv_lib_sockets=
372 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
373 if test "$libgo_check_socket" = "yes"; then
374 unset ac_cv_func_connect
375 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
376 libgo_check_both=yes)
378 if test "$libgo_check_both" = "yes"; then
380 LIBS="$LIBS -lsocket -lnsl"
381 unset ac_cv_func_accept
382 AC_CHECK_FUNC(accept,
384 libgo_cv_lib_sockets="-lsocket -lnsl"])
385 unset ac_cv_func_accept
388 unset ac_cv_func_gethostbyname
389 libgo_old_libs="$LIBS"
390 AC_CHECK_FUNC(gethostbyname, ,
391 [AC_CHECK_LIB(nsl, main,
392 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
393 unset ac_cv_func_gethostbyname
396 NET_LIBS="$libgo_cv_lib_sockets"
399 dnl Test whether the compiler supports the -pthread option.
400 AC_CACHE_CHECK([whether -pthread is supported],
401 [libgo_cv_lib_pthread],
403 CFLAGS="$CFLAGS -pthread"
404 AC_COMPILE_IFELSE([[int i;]],
405 [libgo_cv_lib_pthread=yes],
406 [libgo_cv_lib_pthread=no])
407 CFLAGS=$CFLAGS_hold])
409 if test "$libgo_cv_lib_pthread" = yes; then
410 PTHREAD_CFLAGS=-pthread
412 AC_SUBST(PTHREAD_CFLAGS)
414 dnl Test for the -lpthread library.
416 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
417 AC_SUBST(PTHREAD_LIBS)
419 dnl Test if -lrt is required for sched_yield and/or nanosleep.
420 AC_SEARCH_LIBS([sched_yield], [rt])
421 AC_SEARCH_LIBS([nanosleep], [rt])
425 GCC_CHECK_UNWIND_GETIPINFO
427 AC_ARG_ENABLE(sjlj-exceptions,
428 AC_HELP_STRING([--enable-sjlj-exceptions],
429 [force use of builtin_setjmp for exceptions]),
430 [case "$enableval" in
432 *) AC_MSG_ERROR([unknown argument to --enable-sjlj-exceptions]) ;;
434 [enable_sjlj_exceptions=auto])
436 AC_CACHE_CHECK([whether to use setjmp/longjmp exceptions],
437 [libgo_cv_lib_sjlj_exceptions],
444 int i __attribute__ ((cleanup (clean)));
449 CFLAGS="--save-temps -fexceptions"
450 libgo_cv_lib_sjlj_exceptions=unknown
451 AS_IF([ac_fn_c_try_compile],
452 [if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1; then
453 libgo_cv_lib_sjlj_exceptions=yes
454 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1; then
455 libgo_cv_lib_sjlj_exceptions=no
461 if test "$enable_sjlj_exceptions" = "auto"; then
462 enable_sjlj_exceptions=$libgo_cv_lib_sjlj_exceptions
465 case $enable_sjlj_exceptions in
467 AC_DEFINE(LIBGO_SJLJ_EXCEPTIONS, 1,
468 [Define if the C++ compiler is configured for setjmp/longjmp exceptions.])
473 AC_MSG_ERROR([unable to detect exception model])
477 AC_CHECK_HEADERS(sys/file.h sys/mman.h syscall.h sys/epoll.h sys/inotify.h sys/ptrace.h sys/syscall.h sys/user.h sys/utsname.h sys/select.h sys/socket.h net/if.h net/if_arp.h net/route.h netpacket/packet.h sys/prctl.h sys/mount.h sys/vfs.h sys/statfs.h sys/timex.h sys/sysinfo.h utime.h linux/ether.h linux/fs.h linux/reboot.h netinet/icmp6.h netinet/in_syst.h netinet/ip.h netinet/ip_mroute.h netinet/if_ether.h)
479 AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h linux/netlink.h linux/rtnetlink.h], [], [],
480 [#ifdef HAVE_SYS_SOCKET_H
481 #include <sys/socket.h>
485 AC_CACHE_CHECK([whether <ustat.h> can be used],
486 [libgo_cv_c_ustat_h],
488 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE $OSCFLAGS"
491 #include <sys/types.h>
492 #ifdef HAVE_LINUX_FILTER_H
493 #include <linux/filter.h>
496 ])], [libgo_cv_c_ustat_h=yes], [libgo_cv_c_ustat_h=no])
497 CFLAGS=$CFLAGS_hold])
498 if test $libgo_cv_c_ustat_h = yes; then
499 AC_DEFINE(HAVE_USTAT_H, 1,
500 [Define to 1 if you have the <ustat.h> header file and it works.])
503 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
505 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv dl_iterate_phdr)
506 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
507 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
509 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 openat pipe2 removexattr renameat setxattr sync_file_range splice tee unlinkat unshare utimensat)
511 AC_CHECK_TYPES([loff_t])
515 AC_CHECK_FUNCS(cosl expl logl sinl tanl acosl asinl atanl atan2l expm1l ldexpl log10l log1pl)
518 CFLAGS_hold="$CFLAGS"
519 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
521 LIBS="$LIBS $PTHREAD_LIBS"
522 AC_CHECK_FUNCS(sem_timedwait)
523 CFLAGS="$CFLAGS_hold"
527 LIBS="$LIBS $MATH_LIBS"
528 AC_CHECK_FUNCS(matherr)
531 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4],
532 [libgo_cv_func___sync_bool_compare_and_swap_4],
534 typedef unsigned int uint32 __attribute__ ((mode (SI)));
536 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
538 [libgo_cv_func___sync_bool_compare_and_swap_4=yes],
539 [libgo_cv_func___sync_bool_compare_and_swap_4=no])])
540 if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then
541 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1,
542 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32])
545 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_8],
546 [libgo_cv_func___sync_bool_compare_and_swap_8],
548 typedef unsigned int uint64 __attribute__ ((mode (DI)));
550 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
552 [libgo_cv_func___sync_bool_compare_and_swap_8=yes],
553 [libgo_cv_func___sync_bool_compare_and_swap_8=no])])
554 if test "$libgo_cv_func___sync_bool_compare_and_swap_8" = "yes"; then
555 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_8, 1,
556 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint64])
559 AC_CACHE_CHECK([for __sync_fetch_and_add_4],
560 [libgo_cv_func___sync_fetch_and_add_4],
562 typedef unsigned int uint32 __attribute__ ((mode (SI)));
564 int main() { return __sync_fetch_and_add (&i, 1); }
566 [libgo_cv_func___sync_fetch_and_add_4=yes],
567 [libgo_cv_func___sync_fetch_and_add_4=no])])
568 if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then
569 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1,
570 [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32])
573 AC_CACHE_CHECK([for __sync_add_and_fetch_8],
574 [libgo_cv_func___sync_add_and_fetch_8],
576 typedef unsigned int uint64 __attribute__ ((mode (DI)));
578 int main() { return __sync_add_and_fetch (&i, 1); }
580 [libgo_cv_func___sync_add_and_fetch_8=yes],
581 [libgo_cv_func___sync_add_and_fetch_8=no])])
582 if test "$libgo_cv_func___sync_add_and_fetch_8" = "yes"; then
583 AC_DEFINE(HAVE_SYNC_ADD_AND_FETCH_8, 1,
584 [Define to 1 if the compiler provides the __sync_add_and_fetch function for uint64])
587 dnl For x86 we want to use the -minline-all-stringops option to avoid
588 dnl forcing a stack split when calling memcpy and friends.
589 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
590 [libgo_cv_c_stringops],
592 CFLAGS="$CFLAGS -minline-all-stringops"
593 AC_COMPILE_IFELSE([int i;],
594 [libgo_cv_c_stringops=yes],
595 [libgo_cv_c_stringops=no])
596 CFLAGS=$CFLAGS_hold])
598 if test "$libgo_cv_c_stringops" = yes; then
599 STRINGOPS_FLAG=-minline-all-stringops
601 AC_SUBST(STRINGOPS_FLAG)
603 dnl For x86 we want to compile the math library with -mfancy-math-387
604 dnl -funsafe-math-optimizations so that we can use the builtin
605 dnl instructions directly.
606 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
607 [libgo_cv_c_fancymath],
609 CFLAGS="$CFLAGS -mfancy-math-387"
610 AC_COMPILE_IFELSE([int i;],
611 [libgo_cv_c_fancymath=yes],
612 [libgo_cv_c_fancymath=no])
613 CFLAGS=$CFLAGS_hold])
615 if test "$libgo_cv_c_fancymath" = yes; then
616 MATH_FLAG="-mfancy-math-387 -funsafe-math-optimizations"
621 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
622 AC_CHECK_TYPES([off64_t])
625 dnl Work out the size of the epoll_events struct on GNU/Linux.
626 AC_CACHE_CHECK([epoll_event size],
627 [libgo_cv_c_epoll_event_size],
628 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
629 [sizeof (struct epoll_event)],
630 [#include <sys/epoll.h>],
631 [libgo_cv_c_epoll_event_size=0])])
632 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
633 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
635 dnl Work out the offset of the fd field in the epoll_events struct on
637 AC_CACHE_CHECK([epoll_event data.fd offset],
638 [libgo_cv_c_epoll_event_fd_offset],
639 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
640 [offsetof (struct epoll_event, data.fd)],
642 #include <sys/epoll.h>],
643 [libgo_cv_c_epoll_event_fd_offset=0])])
644 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
645 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
647 dnl See if struct exception is defined in <math.h>.
648 AC_CHECK_TYPE([struct exception],
649 [libgo_has_struct_exception=yes],
650 [libgo_has_struct_exception=no],
652 if test "$libgo_has_struct_exception" = "yes"; then
653 AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
654 [Define to 1 if <math.h> defines struct exception])
657 dnl Check if makecontext expects the uc_stack member of ucontext to point
658 dnl to the top of the stack.
660 sparc*-*-solaris2.[[89]]*)
661 libgo_cv_lib_makecontext_stack_top=yes
664 libgo_cv_lib_makecontext_stack_top=no
667 if test "$libgo_cv_lib_makecontext_stack_top" = "yes"; then
668 AC_DEFINE(MAKECONTEXT_STACK_TOP, 1,
669 [Define if makecontext expects top of stack in uc_stack.])
672 dnl See whether setcontext changes the value of TLS variables.
673 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
674 [libgo_cv_lib_setcontext_clobbers_tls],
675 [CFLAGS_hold="$CFLAGS"
676 CFLAGS="$PTHREAD_CFLAGS"
678 LIBS="$LIBS $PTHREAD_LIBS"
679 AC_CHECK_SIZEOF([void *])
680 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
685 #include <ucontext.h>
690 static char stack[[10 * 1024 * 1024]];
693 /* Called via makecontext/setcontext. */
701 /* Called via pthread_create. */
706 /* The thread should still see this value after calling
712 /* The call to setcontext should not return. */
721 /* The thread should not see this value. */
724 if (getcontext (&c) < 0)
727 c.uc_stack.ss_sp = stack;
728 #ifdef MAKECONTEXT_STACK_TOP
729 c.uc_stack.ss_sp += sizeof stack;
731 c.uc_stack.ss_flags = 0;
732 c.uc_stack.ss_size = sizeof stack;
734 makecontext (&c, cfn, 0);
736 if (pthread_create (&tid, NULL, tfn, NULL) != 0)
739 if (pthread_join (tid, NULL) != 0)
742 /* The thread should have called exit. */
746 [libgo_cv_lib_setcontext_clobbers_tls=no],
747 [libgo_cv_lib_setcontext_clobbers_tls=yes],
748 [case "$target:$ptr_type_size" in
749 i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
750 libgo_cv_lib_setcontext_clobbers_tls=yes ;;
752 libgo_cv_lib_setcontext_clobbers_tls=no ;;
755 CFLAGS="$CFLAGS_hold"
758 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
759 AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
760 [Define if setcontext clobbers TLS variables])
763 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
764 libgo_cv_ro_eh_frame, [
765 libgo_cv_ro_eh_frame=no
766 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
767 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
768 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
769 libgo_cv_ro_eh_frame=yes
770 elif grep '.section.*eh_frame.*#alloc' conftest.c \
771 | grep -v '#write' > /dev/null; then
772 libgo_cv_ro_eh_frame=yes
777 if test "x$libgo_cv_ro_eh_frame" = xyes; then
778 AC_DEFINE(EH_FRAME_FLAGS, "a",
779 [Define to the flags needed for the .section .eh_frame directive.])
781 AC_DEFINE(EH_FRAME_FLAGS, "aw",
782 [Define to the flags needed for the .section .eh_frame directive.])
785 AC_CACHE_CHECK([if assembler supports GNU comdat group syntax],
786 libgo_cv_as_comdat_gnu, [
787 echo '.section .text,"axG",@progbits,.foo,comdat' > conftest.s
788 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
789 libgo_cv_as_comdat_gnu=yes
791 libgo_cv_as_comdat_gnu=no
794 if test "x$libgo_cv_as_comdat_gnu" = xyes; then
795 AC_DEFINE(HAVE_AS_COMDAT_GAS, 1,
796 [Define if your assembler supports GNU comdat group syntax.])
799 AC_CACHE_CHECK([assembler supports pc related relocs],
800 libgo_cv_as_x86_pcrel, [
801 libgo_cv_as_x86_pcrel=yes
802 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
803 if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
804 libgo_cv_as_x86_pcrel=no
807 if test "x$libgo_cv_as_x86_pcrel" = xyes; then
808 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
809 [Define if your assembler supports PC relative relocs.])
812 AC_CACHE_CHECK([assembler supports unwind section type],
813 libgo_cv_as_x86_64_unwind_section_type, [
814 libgo_cv_as_x86_64_unwind_section_type=yes
815 echo '.section .eh_frame,"a",@unwind' > conftest.s
816 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
817 libgo_cv_as_x86_64_unwind_section_type=no
820 if test "x$libgo_cv_as_x86_64_unwind_section_type" = xyes; then
821 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
822 [Define if your assembler supports unwind section type.])
827 if test ${multilib} = yes; then
828 multilib_arg="--enable-multilib"
833 AC_CONFIG_FILES(Makefile testsuite/Makefile)
835 AC_CONFIG_COMMANDS([default],
836 [if test -n "$CONFIG_FILES"; then
837 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
838 # that multilib installs will end up installed in the correct place.
839 # The testsuite needs it for multilib-aware ABI baseline files.
840 # To work around this not being passed down from config-ml.in ->
841 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
842 # append it here. Only modify Makefiles that have just been created.
844 # Also, get rid of this simulated-VPATH thing that automake does.
846 s!`test -f '$<' || echo '$(srcdir)/'`!!
848 for i in $SUBDIRS; do
849 case $CONFIG_FILES in
851 #echo "Adding MULTISUBDIR to $i/Makefile"
852 sed -f vpsed $i/Makefile > tmp
853 grep '^MULTISUBDIR =' Makefile >> tmp
862 # Variables needed in config.status (file generation) which aren't already
863 # passed by autoconf.