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 -Wall])
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=${CC_FOR_BUILD:-gcc}
46 AC_SUBST(CC_FOR_BUILD)
50 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
53 dnl FIXME: This should be controlled by --enable-maintainer-mode.
58 glibgo_toolexeclibdir=no
59 glibgo_prefixdir=$prefix
61 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
62 AC_ARG_ENABLE([version-specific-runtime-libs],
63 AC_HELP_STRING([--enable-version-specific-runtime-libs],
64 [Specify that runtime libraries should be installed in a compiler-specific directory]),
66 yes) version_specific_libs=yes ;;
67 no) version_specific_libs=no ;;
68 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
70 [version_specific_libs=no])
71 AC_MSG_RESULT($version_specific_libs)
73 # Version-specific runtime libs processing.
74 if test $version_specific_libs = yes; then
75 glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
76 glibgo_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
79 # Calculate glibgo_toolexecdir, glibgo_toolexeclibdir
80 # Install a library built with a cross compiler in tooldir, not libdir.
81 if test x"$glibgo_toolexecdir" = x"no"; then
82 if test -n "$with_cross_host" &&
83 test x"$with_cross_host" != x"no"; then
84 glibgo_toolexecdir='${exec_prefix}/${host_alias}'
85 glibgo_toolexeclibdir='${toolexecdir}/lib'
87 glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
88 glibgo_toolexeclibdir='${libdir}'
90 multi_os_directory=`$CC -print-multi-os-directory`
91 case $multi_os_directory in
92 .) ;; # Avoid trailing /.
93 *) glibgo_toolexeclibdir=$glibgo_toolexeclibdir/$multi_os_directory ;;
97 AC_SUBST(glibgo_prefixdir)
98 AC_SUBST(glibgo_toolexecdir)
99 AC_SUBST(glibgo_toolexeclibdir)
101 # See if the user wants to configure without libffi. Some
102 # architectures don't support it. FIXME: We should set a default
105 AS_HELP_STRING([--without-libffi],
108 [with_libffi=${with_libffi_default-yes}])
112 if test "$with_libffi" != no; then
113 AC_DEFINE(USE_LIBFFI, 1, [Define if we're to use libffi.])
114 LIBFFI=../libffi/libffi_convenience.la
115 LIBFFIINCS='-I$(top_srcdir)/../libffi/include -I../libffi/include'
120 # Used to tell GNU make to include a file without telling automake to
122 go_include="-include"
133 *-*-darwin*) is_darwin=yes; GOOS=darwin ;;
134 *-*-freebsd*) is_freebsd=yes; GOOS=freebsd ;;
135 *-*-irix6*) is_irix=yes; GOOS=irix ;;
136 *-*-linux*) is_linux=yes; GOOS=linux ;;
137 *-*-rtems*) is_rtems=yes; GOOS=rtems ;;
138 *-*-solaris2*) is_solaris=yes; GOOS=solaris ;;
140 AM_CONDITIONAL(LIBGO_IS_DARWIN, test $is_darwin = yes)
141 AM_CONDITIONAL(LIBGO_IS_FREEBSD, test $is_freebsd = yes)
142 AM_CONDITIONAL(LIBGO_IS_IRIX, test $is_irix = yes)
143 AM_CONDITIONAL(LIBGO_IS_LINUX, test $is_linux = yes)
144 AM_CONDITIONAL(LIBGO_IS_RTEMS, test $is_rtems = yes)
145 AM_CONDITIONAL(LIBGO_IS_SOLARIS, test $is_solaris = yes)
148 dnl N.B. Keep in sync with gcc/testsuite/go.test/go-test.exp (go-set-goarch).
165 arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
170 i[34567]86-*-* | x86_64-*-*)
176 [is_386=yes], [is_x86_64=yes])
177 if test "$is_386" = "yes"; then
189 #if _MIPS_SIM != _ABIO32
194 #if _MIPS_SIM != _ABIN32
199 #if _MIPS_SIM != _ABI64
204 #if _MIPS_SIM != _ABIO64
208 [AC_MSG_ERROR([unknown MIPS ABI])
209 [mips_abi="n32"]])])])])
211 "o32") GOARCH=mipso32 ;;
212 "n32") GOARCH=mipsn32 ;;
213 "n64") GOARCH=mipsn64 ;;
214 "o64") GOARCH=mipso64 ;;
217 rs6000*-*-* | powerpc*-*-*)
222 [is_ppc=yes], [is_ppc64=yes])
223 if test "$is_ppc" = "yes"; then
231 #if defined(__sparcv9) || defined(__arch64__)
234 [is_sparc=yes], [is_sparc64=yes])
235 if test "$is_sparc" = "yes"; then
242 AM_CONDITIONAL(LIBGO_IS_386, test $is_386 = yes)
243 AM_CONDITIONAL(LIBGO_IS_ALPHA, test $is_alpha = yes)
244 AM_CONDITIONAL(LIBGO_IS_ARM, test $is_arm = yes)
245 AM_CONDITIONAL(LIBGO_IS_M68K, test $is_m68k = yes)
246 AM_CONDITIONAL(LIBGO_IS_MIPS, test $mips_abi != unknown)
247 AM_CONDITIONAL(LIBGO_IS_MIPSO32, test $mips_abi = o32)
248 AM_CONDITIONAL(LIBGO_IS_MIPSN32, test $mips_abi = n32)
249 AM_CONDITIONAL(LIBGO_IS_MIPSN64, test $mips_abi = n64)
250 AM_CONDITIONAL(LIBGO_IS_MIPSO64, test $mips_abi = o64)
251 AM_CONDITIONAL(LIBGO_IS_PPC, test $is_ppc = yes)
252 AM_CONDITIONAL(LIBGO_IS_PPC64, test $is_ppc64 = yes)
253 AM_CONDITIONAL(LIBGO_IS_SPARC, test $is_sparc = yes)
254 AM_CONDITIONAL(LIBGO_IS_SPARC64, test $is_sparc64 = yes)
255 AM_CONDITIONAL(LIBGO_IS_X86_64, test $is_x86_64 = yes)
258 dnl Some files are only present when needed for specific architectures.
260 GO_LIBCALL_OS_ARCH_FILE=
262 GO_SYSCALL_OS_ARCH_FILE=
263 if test -f ${srcdir}/go/syscall/libcall_${GOOS}.go; then
264 GO_LIBCALL_OS_FILE=go/syscall/libcall_${GOOS}.go
266 if test -f ${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go; then
267 GO_LIBCALL_OS_ARCH_FILE=go/syscall/libcall_${GOOS}_${GOARCH}.go
269 if test -f ${srcdir}/go/syscall/syscall_${GOOS}.go; then
270 GO_SYSCALL_OS_FILE=go/syscall/syscall_${GOOS}.go
272 if test -f ${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go; then
273 GO_SYSCALL_OS_ARCH_FILE=go/syscall/syscall_${GOOS}_${GOARCH}.go
275 AC_SUBST(GO_LIBCALL_OS_FILE)
276 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
277 AC_SUBST(GO_SYSCALL_OS_FILE)
278 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
280 dnl Some targets need special flags to build sysinfo.go.
283 # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
284 # msghdr in <sys/socket.h>.
285 OSCFLAGS='-D_XOPEN_SOURCE=500'
288 # Solaris 8/9 need this so struct msghdr gets the msg_control
289 # etc. fields in <sys/socket.h> (_XPG4_2).
290 OSCFLAGS='-D_XOPEN_SOURCE=500 -D_XOPEN_SOURCE_EXTENDED -D__EXTENSIONS__'
292 *-*-solaris2.1[[01]])
293 # Solaris 10+ needs this so struct msghdr gets the msg_control
294 # etc. fields in <sys/socket.h> (_XPG4_2). _XOPEN_SOURCE=500 as
295 # above doesn't work with C99.
296 OSCFLAGS='-D_XOPEN_SOURCE=600 -D__EXTENSIONS__'
301 dnl Use -fsplit-stack when compiling C code if available.
302 AC_CACHE_CHECK([whether -fsplit-stack is supported],
303 [libgo_cv_c_split_stack_supported],
305 CFLAGS="$CFLAGS -fsplit-stack"
306 AC_COMPILE_IFELSE([[int i;]],
307 [libgo_cv_c_split_stack_supported=yes],
308 [libgo_cv_c_split_stack_supported=no])
309 CFLAGS=$CFLAGS_hold])
310 if test "$libgo_cv_c_split_stack_supported" = yes; then
311 SPLIT_STACK=-fsplit-stack
312 AC_DEFINE(USING_SPLIT_STACK, 1,
313 [Define if the compiler supports -fsplit-stack])
317 AC_SUBST(SPLIT_STACK)
318 AM_CONDITIONAL(USING_SPLIT_STACK,
319 test "$libgo_cv_c_split_stack_supported" = yes)
321 dnl Check whether the linker does stack munging when calling from
322 dnl split-stack into non-split-stack code. We check this by looking
323 dnl at the --help output. FIXME: This is only half right: it's
324 dnl possible for the linker to support this for some targets but not
326 AC_CACHE_CHECK([whether linker supports split stack],
327 [libgo_cv_c_linker_supports_split_stack],
328 libgo_cv_c_linker_supports_split_stack=no
329 if $LD --help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
330 libgo_cv_c_linker_supports_split_stack=yes
332 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
333 AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
334 [Define if the linker support split stack adjustments])
337 dnl Test for the -lm library.
339 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
342 dnl Test for -lsocket and -lnsl. Copied from libjava/configure.ac.
343 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
344 [libgo_cv_lib_sockets=
346 AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
347 if test "$libgo_check_socket" = "yes"; then
348 unset ac_cv_func_connect
349 AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
350 libgo_check_both=yes)
352 if test "$libgo_check_both" = "yes"; then
354 LIBS="$LIBS -lsocket -lnsl"
355 unset ac_cv_func_accept
356 AC_CHECK_FUNC(accept,
358 libgo_cv_lib_sockets="-lsocket -lnsl"])
359 unset ac_cv_func_accept
362 unset ac_cv_func_gethostbyname
363 libgo_old_libs="$LIBS"
364 AC_CHECK_FUNC(gethostbyname, ,
365 [AC_CHECK_LIB(nsl, main,
366 [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
367 unset ac_cv_func_gethostbyname
370 NET_LIBS="$libgo_cv_lib_sockets"
373 dnl Test whether the compiler supports the -pthread option.
374 AC_CACHE_CHECK([whether -pthread is supported],
375 [libgo_cv_lib_pthread],
377 CFLAGS="$CFLAGS -pthread"
378 AC_COMPILE_IFELSE([[int i;]],
379 [libgo_cv_lib_pthread=yes],
380 [libgo_cv_lib_pthread=no])
381 CFLAGS=$CFLAGS_hold])
383 if test "$libgo_cv_lib_pthread" = yes; then
384 PTHREAD_CFLAGS=-pthread
386 AC_SUBST(PTHREAD_CFLAGS)
388 dnl Test for the -lpthread library.
390 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
391 AC_SUBST(PTHREAD_LIBS)
393 dnl Test if -lrt is required for sched_yield.
394 AC_SEARCH_LIBS([sched_yield], [rt])
398 GCC_CHECK_UNWIND_GETIPINFO
400 AC_ARG_ENABLE(sjlj-exceptions,
401 AC_HELP_STRING([--enable-sjlj-exceptions],
402 [force use of builtin_setjmp for exceptions]),
403 [case "$enableval" in
405 *) AC_MSG_ERROR([unknown argument to --enable-sjlj-exceptions]) ;;
407 [enable_sjlj_exceptions=auto])
409 AC_CACHE_CHECK([whether to use setjmp/longjmp exceptions],
410 [libgo_cv_lib_sjlj_exceptions],
417 int i __attribute__ ((cleanup (clean)));
422 CFLAGS="--save-temps -fexceptions"
423 libgo_cv_lib_sjlj_exceptions=unknown
424 AS_IF([ac_fn_c_try_compile],
425 [if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1; then
426 libgo_cv_lib_sjlj_exceptions=yes
427 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1; then
428 libgo_cv_lib_sjlj_exceptions=no
434 if test "$enable_sjlj_exceptions" = "auto"; then
435 enable_sjlj_exceptions=$libgo_cv_lib_sjlj_exceptions
438 case $enable_sjlj_exceptions in
440 AC_DEFINE(LIBGO_SJLJ_EXCEPTIONS, 1,
441 [Define if the C++ compiler is configured for setjmp/longjmp exceptions.])
446 AC_MSG_ERROR([unable to detect exception model])
450 AC_CHECK_HEADERS(sys/mman.h syscall.h sys/epoll.h sys/ptrace.h sys/syscall.h sys/user.h sys/utsname.h sys/select.h sys/socket.h net/if.h)
452 AC_CHECK_HEADERS([linux/filter.h linux/netlink.h linux/rtnetlink.h], [], [],
453 [#ifdef HAVE_SYS_SOCKET_H
454 #include <sys/socket.h>
458 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
460 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv)
461 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
462 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
464 CFLAGS_hold="$CFLAGS"
465 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
467 LIBS="$LIBS $PTHREAD_LIBS"
468 AC_CHECK_FUNCS(sem_timedwait)
469 CFLAGS="$CFLAGS_hold"
472 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4],
473 [libgo_cv_func___sync_bool_compare_and_swap_4],
475 typedef unsigned int uint32 __attribute__ ((mode (SI)));
477 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
479 [libgo_cv_func___sync_bool_compare_and_swap_4=yes],
480 [libgo_cv_func___sync_bool_compare_and_swap_4=no])])
481 if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then
482 AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1,
483 [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32])
486 AC_CACHE_CHECK([for __sync_fetch_and_add_4],
487 [libgo_cv_func___sync_fetch_and_add_4],
489 typedef unsigned int uint32 __attribute__ ((mode (SI)));
491 int main() { return __sync_fetch_and_add (&i, 1); }
493 [libgo_cv_func___sync_fetch_and_add_4=yes],
494 [libgo_cv_func___sync_fetch_and_add_4=no])])
495 if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then
496 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1,
497 [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32])
500 dnl For x86 we want to use the -minline-all-stringops option to avoid
501 dnl forcing a stack split when calling memcpy and friends.
502 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
503 [libgo_cv_c_stringops],
505 CFLAGS="$CFLAGS -minline-all-stringops"
506 AC_COMPILE_IFELSE([int i;],
507 [libgo_cv_c_stringops=yes],
508 [libgo_cv_c_stringops=no])
509 CFLAGS=$CFLAGS_hold])
511 if test "$libgo_cv_c_stringops" = yes; then
512 STRINGOPS_FLAG=-minline-all-stringops
514 AC_SUBST(STRINGOPS_FLAG)
517 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
518 AC_CHECK_TYPES(off64_t)
521 dnl Work out the size of the epoll_events struct on GNU/Linux.
522 AC_CACHE_CHECK([epoll_event size],
523 [libgo_cv_c_epoll_event_size],
524 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
525 [sizeof (struct epoll_event)],
526 [#include <sys/epoll.h>],
527 [libgo_cv_c_epoll_event_size=0])])
528 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
529 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
531 dnl Work out the offset of the fd field in the epoll_events struct on
533 AC_CACHE_CHECK([epoll_event data.fd offset],
534 [libgo_cv_c_epoll_event_fd_offset],
535 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
536 [offsetof (struct epoll_event, data.fd)],
538 #include <sys/epoll.h>],
539 [libgo_cv_c_epoll_event_fd_offset=0])])
540 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
541 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
545 if test ${multilib} = yes; then
546 multilib_arg="--enable-multilib"
551 AC_CONFIG_FILES(Makefile testsuite/Makefile)
553 AC_CONFIG_COMMANDS([default],
554 [if test -n "$CONFIG_FILES"; then
555 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
556 # that multilib installs will end up installed in the correct place.
557 # The testsuite needs it for multilib-aware ABI baseline files.
558 # To work around this not being passed down from config-ml.in ->
559 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
560 # append it here. Only modify Makefiles that have just been created.
562 # Also, get rid of this simulated-VPATH thing that automake does.
564 s!`test -f '$<' || echo '$(srcdir)/'`!!
566 for i in $SUBDIRS; do
567 case $CONFIG_FILES in
569 #echo "Adding MULTISUBDIR to $i/Makefile"
570 sed -f vpsed $i/Makefile > tmp
571 grep '^MULTISUBDIR =' Makefile >> tmp
580 # Variables needed in config.status (file generation) which aren't already
581 # passed by autoconf.