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[pf3gnuchains/gcc-fork.git] / libgo / configure.ac
1 # configure.ac -- Go library configure script.
2
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.
6
7 # Process this file with autoreconf to produce configure.
8
9 AC_PREREQ(2.64)
10 AC_INIT(package-unused, version-unused,, libgo)
11 AC_CONFIG_SRCDIR(Makefile.am)
12 AC_CONFIG_HEADER(config.h)
13
14 libtool_VERSION=1:0:0
15 AC_SUBST(libtool_VERSION)
16
17 AM_ENABLE_MULTILIB(, ..)
18
19 AC_CANONICAL_SYSTEM
20 target_alias=${target_alias-$host_alias}
21
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])
25
26 m4_rename([_AC_ARG_VAR_PRECIOUS],[glibgo_PRECIOUS])
27 m4_define([_AC_ARG_VAR_PRECIOUS],[])
28 AC_PROG_CC
29 AC_PROG_GO
30 m4_rename_force([glibgo_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
31
32 AC_SUBST(CFLAGS)
33
34 AM_MAINTAINER_MODE
35
36 AC_PROG_LD
37 AC_PROG_RANLIB
38 AC_CHECK_TOOL(OBJCOPY, objcopy, missing-objcopy)
39
40 AC_LIBTOOL_DLOPEN
41 AM_PROG_LIBTOOL
42 AC_SUBST(enable_shared)
43 AC_SUBST(enable_static)
44
45 CC_FOR_BUILD=${CC_FOR_BUILD:-gcc}
46 AC_SUBST(CC_FOR_BUILD)
47
48 AC_PROG_AWK
49
50 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
51 AC_SUBST(WARN_FLAGS)
52
53 dnl FIXME: This should be controlled by --enable-maintainer-mode.
54 WERROR="-Werror"
55 AC_SUBST(WERROR)
56
57 glibgo_toolexecdir=no
58 glibgo_toolexeclibdir=no
59
60 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
61 AC_ARG_ENABLE([version-specific-runtime-libs],
62   AC_HELP_STRING([--enable-version-specific-runtime-libs],
63                  [Specify that runtime libraries should be installed in a compiler-specific directory]),
64   [case "$enableval" in
65     yes) version_specific_libs=yes ;;
66     no)  version_specific_libs=no ;;
67     *)   AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
68    esac],
69   [version_specific_libs=no])
70 AC_MSG_RESULT($version_specific_libs)
71
72 # Version-specific runtime libs processing.
73 if test $version_specific_libs = yes; then
74   glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
75   glibgo_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
76 fi
77
78 # Calculate glibgo_toolexecdir, glibgo_toolexeclibdir
79 # Install a library built with a cross compiler in tooldir, not libdir.
80 if test -n "$with_cross_host" &&
81    test x"$with_cross_host" != x"no"; then
82   nover_glibgo_toolexecdir='${exec_prefix}/${host_alias}'
83   nover_glibgo_toolexeclibdir='${toolexecdir}/lib'
84 else
85   nover_glibgo_toolexecdir='${libdir}/gcc/${host_alias}'
86   nover_glibgo_toolexeclibdir='${libdir}'
87 fi
88 multi_os_directory=`$CC -print-multi-os-directory`
89 case $multi_os_directory in
90   .) ;; # Avoid trailing /.
91   *) nover_glibgo_toolexeclibdir=${nover_glibgo_toolexeclibdir}/${multi_os_directory} ;;
92 esac
93
94 if test x"$glibgo_toolexecdir" = x"no"; then
95   glibgo_toolexecdir="${nover_glibgo_toolexecdir}"
96   glibgo_toolexeclibdir="${nover_glibgo_toolexeclibdir}"
97 fi
98
99 AC_SUBST(glibgo_toolexecdir)
100 AC_SUBST(glibgo_toolexeclibdir)
101 AC_SUBST(nover_glibgo_toolexeclibdir)
102
103 # See if the user wants to configure without libffi.  Some
104 # architectures don't support it.  FIXME: We should set a default
105 # based on the host.
106 AC_ARG_WITH(libffi,
107   AS_HELP_STRING([--without-libffi],
108                  [don't use libffi]),
109   [:],
110   [with_libffi=${with_libffi_default-yes}])
111
112 LIBFFI=
113 LIBFFIINCS=
114 if test "$with_libffi" != no; then
115    AC_DEFINE(USE_LIBFFI, 1, [Define if we're to use libffi.])
116    LIBFFI=../libffi/libffi_convenience.la
117    LIBFFIINCS='-I$(top_srcdir)/../libffi/include -I../libffi/include'
118 fi
119 AC_SUBST(LIBFFI)
120 AC_SUBST(LIBFFIINCS)
121
122 # Used to tell GNU make to include a file without telling automake to
123 # include it.
124 go_include="-include"
125 AC_SUBST(go_include)
126
127 is_darwin=no
128 is_freebsd=no
129 is_irix=no
130 is_linux=no
131 is_netbsd=no
132 is_rtems=no
133 is_solaris=no
134 GOOS=unknown
135 case ${host} in
136   *-*-darwin*)   is_darwin=yes;  GOOS=darwin ;;
137   *-*-freebsd*)  is_freebsd=yes; GOOS=freebsd ;;
138   *-*-irix6*)    is_irix=yes;    GOOS=irix ;;
139   *-*-linux*)    is_linux=yes;   GOOS=linux ;;
140   *-*-netbsd*)   is_netbsd=yes;  GOOS=netbsd ;;
141   *-*-rtems*)    is_rtems=yes;   GOOS=rtems ;;
142   *-*-solaris2*) is_solaris=yes; GOOS=solaris ;;
143 esac
144 AM_CONDITIONAL(LIBGO_IS_DARWIN, test $is_darwin = yes)
145 AM_CONDITIONAL(LIBGO_IS_FREEBSD, test $is_freebsd = yes)
146 AM_CONDITIONAL(LIBGO_IS_IRIX, test $is_irix = yes)
147 AM_CONDITIONAL(LIBGO_IS_LINUX, test $is_linux = yes)
148 AM_CONDITIONAL(LIBGO_IS_NETBSD, test $is_netbsd = yes)
149 AM_CONDITIONAL(LIBGO_IS_RTEMS, test $is_rtems = yes)
150 AM_CONDITIONAL(LIBGO_IS_SOLARIS, test $is_solaris = yes)
151 AC_SUBST(GOOS)
152
153 dnl N.B. Keep in sync with gcc/testsuite/go.test/go-test.exp (go-set-goarch).
154 is_386=no
155 is_alpha=no
156 is_arm=no
157 is_m68k=no
158 mips_abi=unknown
159 is_ppc=no
160 is_ppc64=no
161 is_sparc=no
162 is_sparc64=no
163 is_x86_64=no
164 GOARCH=unknown
165 case ${host} in
166   alpha*-*-*)
167     is_alpha=yes
168     GOARCH=alpha
169     ;;
170   arm*-*-* | strongarm*-*-* | ep9312*-*-* | xscale-*-*)
171     is_arm=yes
172     GOARCH=arm
173     ;;
174 changequote(,)dnl
175   i[34567]86-*-* | x86_64-*-*)
176 changequote([,])dnl
177     AC_COMPILE_IFELSE([
178 #ifdef __x86_64__
179 #error 64-bit
180 #endif],
181 [is_386=yes], [is_x86_64=yes])
182     if test "$is_386" = "yes"; then
183       GOARCH=386
184     else
185       GOARCH=amd64
186     fi
187     ;;
188   m68k*-*-*)
189     is_m68k=yes
190     GOARCH=m68k
191     ;;
192   mips*-*-*)
193     AC_COMPILE_IFELSE([
194 #if _MIPS_SIM != _ABIO32
195 #error not o32
196 #endif],
197 [mips_abi="o32"],
198         [AC_COMPILE_IFELSE([
199 #if _MIPS_SIM != _ABIN32
200 #error not n32
201 #endif],
202 [mips_abi="n32"],
203         [AC_COMPILE_IFELSE([
204 #if _MIPS_SIM != _ABI64
205 #error not n64
206 #endif],
207 [mips_abi="n64"],
208         [AC_COMPILE_IFELSE([
209 #if _MIPS_SIM != _ABIO64
210 #error not o64
211 #endif],
212 [mips_abi="o64"],
213         [AC_MSG_ERROR([unknown MIPS ABI])
214 [mips_abi="n32"]])])])])
215     case "$mips_abi" in
216     "o32") GOARCH=mipso32 ;;
217     "n32") GOARCH=mipsn32 ;;
218     "n64") GOARCH=mipsn64 ;;
219     "o64") GOARCH=mipso64 ;;
220     esac
221     ;;
222   rs6000*-*-* | powerpc*-*-*)
223     AC_COMPILE_IFELSE([
224 #ifdef _ARCH_PPC64
225 #error 64-bit
226 #endif],
227 [is_ppc=yes], [is_ppc64=yes])
228     if test "$is_ppc" = "yes"; then
229       GOARCH=ppc
230     else
231       GOARCH=ppc64
232     fi
233     ;;
234   sparc*-*-*)
235     AC_COMPILE_IFELSE([
236 #if defined(__sparcv9) || defined(__arch64__)
237 #error 64-bit
238 #endif],
239 [is_sparc=yes], [is_sparc64=yes])
240     if test "$is_sparc" = "yes"; then
241       GOARCH=sparc
242     else
243       GOARCH=sparc64
244     fi
245     ;;
246 esac
247 AM_CONDITIONAL(LIBGO_IS_386, test $is_386 = yes)
248 AM_CONDITIONAL(LIBGO_IS_ALPHA, test $is_alpha = yes)
249 AM_CONDITIONAL(LIBGO_IS_ARM, test $is_arm = yes)
250 AM_CONDITIONAL(LIBGO_IS_M68K, test $is_m68k = yes)
251 AM_CONDITIONAL(LIBGO_IS_MIPS, test $mips_abi != unknown)
252 AM_CONDITIONAL(LIBGO_IS_MIPSO32, test $mips_abi = o32)
253 AM_CONDITIONAL(LIBGO_IS_MIPSN32, test $mips_abi = n32)
254 AM_CONDITIONAL(LIBGO_IS_MIPSN64, test $mips_abi = n64)
255 AM_CONDITIONAL(LIBGO_IS_MIPSO64, test $mips_abi = o64)
256 AM_CONDITIONAL(LIBGO_IS_PPC, test $is_ppc = yes)
257 AM_CONDITIONAL(LIBGO_IS_PPC64, test $is_ppc64 = yes)
258 AM_CONDITIONAL(LIBGO_IS_SPARC, test $is_sparc = yes)
259 AM_CONDITIONAL(LIBGO_IS_SPARC64, test $is_sparc64 = yes)
260 AM_CONDITIONAL(LIBGO_IS_X86_64, test $is_x86_64 = yes)
261 AC_SUBST(GOARCH)
262
263 dnl Some files are only present when needed for specific architectures.
264 GO_LIBCALL_OS_FILE=
265 GO_LIBCALL_OS_ARCH_FILE=
266 GO_SYSCALL_OS_FILE=
267 GO_SYSCALL_OS_ARCH_FILE=
268 if test -f ${srcdir}/go/syscall/libcall_${GOOS}.go; then
269   GO_LIBCALL_OS_FILE=go/syscall/libcall_${GOOS}.go
270 fi
271 if test -f ${srcdir}/go/syscall/libcall_${GOOS}_${GOARCH}.go; then
272   GO_LIBCALL_OS_ARCH_FILE=go/syscall/libcall_${GOOS}_${GOARCH}.go
273 fi
274 if test -f ${srcdir}/go/syscall/syscall_${GOOS}.go; then
275   GO_SYSCALL_OS_FILE=go/syscall/syscall_${GOOS}.go
276 fi
277 if test -f ${srcdir}/go/syscall/syscall_${GOOS}_${GOARCH}.go; then
278   GO_SYSCALL_OS_ARCH_FILE=go/syscall/syscall_${GOOS}_${GOARCH}.go
279 fi
280 AC_SUBST(GO_LIBCALL_OS_FILE)
281 AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
282 AC_SUBST(GO_SYSCALL_OS_FILE)
283 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
284
285 dnl Special flags used to generate sysinfo.go.
286 OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
287 case "$target" in
288     mips-sgi-irix6.5*)
289         # IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
290         # msghdr in <sys/socket.h>.
291         OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
292         ;;
293     *-*-solaris2.[[89]])
294         # Solaris 8/9 need this so struct msghdr gets the msg_control
295         # etc. fields in <sys/socket.h> (_XPG4_2).
296         OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500 -D_XOPEN_SOURCE_EXTENDED -D__EXTENSIONS__"
297         ;;
298     *-*-solaris2.1[[01]])
299         # Solaris 10+ needs this so struct msghdr gets the msg_control
300         # etc. fields in <sys/socket.h> (_XPG4_2).  _XOPEN_SOURCE=600 as
301         # above doesn't work with C99.
302         OSCFLAGS="$OSCFLAGS -std=gnu99 -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
303         ;;
304 esac
305 AC_SUBST(OSCFLAGS)
306
307 dnl Use -fsplit-stack when compiling C code if available.
308 AC_CACHE_CHECK([whether -fsplit-stack is supported],
309 [libgo_cv_c_split_stack_supported],
310 [CFLAGS_hold=$CFLAGS
311 CFLAGS="$CFLAGS -fsplit-stack"
312 AC_COMPILE_IFELSE([[int i;]],
313 [libgo_cv_c_split_stack_supported=yes],
314 [libgo_cv_c_split_stack_supported=no])
315 CFLAGS=$CFLAGS_hold])
316 if test "$libgo_cv_c_split_stack_supported" = yes; then
317   SPLIT_STACK=-fsplit-stack
318   AC_DEFINE(USING_SPLIT_STACK, 1,
319                 [Define if the compiler supports -fsplit-stack])
320 else
321   SPLIT_STACK=
322 fi
323 AC_SUBST(SPLIT_STACK)
324 AM_CONDITIONAL(USING_SPLIT_STACK,
325         test "$libgo_cv_c_split_stack_supported" = yes)
326
327 dnl Check whether the linker does stack munging when calling from
328 dnl split-stack into non-split-stack code.  We check this by looking
329 dnl at the --help output.  FIXME: This is only half right: it's
330 dnl possible for the linker to support this for some targets but not
331 dnl others.
332 AC_CACHE_CHECK([whether linker supports split stack],
333 [libgo_cv_c_linker_supports_split_stack],
334 libgo_cv_c_linker_supports_split_stack=no
335 if $LD --help 2>/dev/null | grep split-stack-adjust-size >/dev/null 2>&1; then
336   libgo_cv_c_linker_supports_split_stack=yes
337 fi)
338 if test "$libgo_cv_c_linker_supports_split_stack" = yes; then
339   AC_DEFINE(LINKER_SUPPORTS_SPLIT_STACK, 1,
340             [Define if the linker support split stack adjustments])
341 fi
342
343 dnl Test for the -lm library.
344 MATH_LIBS=
345 AC_CHECK_LIB([m], [sqrt], MATH_LIBS=-lm)
346 AC_SUBST(MATH_LIBS)
347
348 dnl Test for -lsocket and -lnsl.  Copied from libjava/configure.ac.
349 AC_CACHE_CHECK([for socket libraries], libgo_cv_lib_sockets,
350   [libgo_cv_lib_sockets=
351    libgo_check_both=no
352    AC_CHECK_FUNC(connect, libgo_check_socket=no, libgo_check_socket=yes)
353    if test "$libgo_check_socket" = "yes"; then
354      unset ac_cv_func_connect
355      AC_CHECK_LIB(socket, main, libgo_cv_lib_sockets="-lsocket",
356                   libgo_check_both=yes)
357    fi
358    if test "$libgo_check_both" = "yes"; then
359      libgo_old_libs=$LIBS
360      LIBS="$LIBS -lsocket -lnsl"
361      unset ac_cv_func_accept
362      AC_CHECK_FUNC(accept,
363                    [libgo_check_nsl=no
364                     libgo_cv_lib_sockets="-lsocket -lnsl"])
365      unset ac_cv_func_accept
366      LIBS=$libgo_old_libs
367    fi
368    unset ac_cv_func_gethostbyname
369    libgo_old_libs="$LIBS"
370    AC_CHECK_FUNC(gethostbyname, ,
371                  [AC_CHECK_LIB(nsl, main,
372                         [libgo_cv_lib_sockets="$libgo_cv_lib_sockets -lnsl"])])
373    unset ac_cv_func_gethostbyname
374    LIBS=$libgo_old_libs
375 ])
376 NET_LIBS="$libgo_cv_lib_sockets"
377 AC_SUBST(NET_LIBS)
378
379 dnl Test whether the compiler supports the -pthread option.
380 AC_CACHE_CHECK([whether -pthread is supported],
381 [libgo_cv_lib_pthread],
382 [CFLAGS_hold=$CFLAGS
383 CFLAGS="$CFLAGS -pthread"
384 AC_COMPILE_IFELSE([[int i;]],
385 [libgo_cv_lib_pthread=yes],
386 [libgo_cv_lib_pthread=no])
387 CFLAGS=$CFLAGS_hold])
388 PTHREAD_CFLAGS=
389 if test "$libgo_cv_lib_pthread" = yes; then
390   PTHREAD_CFLAGS=-pthread
391 fi
392 AC_SUBST(PTHREAD_CFLAGS)
393
394 dnl Test for the -lpthread library.
395 PTHREAD_LIBS=
396 AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS=-lpthread)
397 AC_SUBST(PTHREAD_LIBS)
398
399 dnl Test if -lrt is required for sched_yield.
400 AC_SEARCH_LIBS([sched_yield], [rt])
401
402 AC_C_BIGENDIAN
403
404 GCC_CHECK_UNWIND_GETIPINFO
405
406 AC_ARG_ENABLE(sjlj-exceptions,
407   AC_HELP_STRING([--enable-sjlj-exceptions],
408                  [force use of builtin_setjmp for exceptions]),
409   [case "$enableval" in
410    yes|no|auto) ;;
411    *) AC_MSG_ERROR([unknown argument to --enable-sjlj-exceptions]) ;;
412    esac],
413   [enable_sjlj_exceptions=auto])
414
415 AC_CACHE_CHECK([whether to use setjmp/longjmp exceptions],
416 [libgo_cv_lib_sjlj_exceptions],
417 [AC_LANG_CONFTEST(
418   [AC_LANG_SOURCE([
419 void bar ();
420 void clean (int *);
421 void foo ()
422 {
423   int i __attribute__ ((cleanup (clean)));
424   bar();
425 }
426 ])])
427 CFLAGS_hold=$CFLAGS
428 CFLAGS="--save-temps -fexceptions"
429 libgo_cv_lib_sjlj_exceptions=unknown
430 AS_IF([ac_fn_c_try_compile],
431   [if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1; then
432     libgo_cv_lib_sjlj_exceptions=yes
433   elif grep _Unwind_Resume conftest.s >/dev/null 2>&1; then
434     libgo_cv_lib_sjlj_exceptions=no
435   fi])
436 CFLAGS=$CFLAGS_hold
437 rm -f conftest*
438 ])
439
440 if test "$enable_sjlj_exceptions" = "auto"; then
441   enable_sjlj_exceptions=$libgo_cv_lib_sjlj_exceptions
442 fi
443
444 case $enable_sjlj_exceptions in
445 yes)
446   AC_DEFINE(LIBGO_SJLJ_EXCEPTIONS, 1,
447         [Define if the C++ compiler is configured for setjmp/longjmp exceptions.])
448   ;;
449 no)
450   ;;
451 *)
452   AC_MSG_ERROR([unable to detect exception model])
453   ;;
454 esac
455
456 AC_CHECK_HEADERS(sys/mman.h syscall.h sys/epoll.h sys/ptrace.h sys/syscall.h sys/user.h sys/utsname.h sys/select.h sys/socket.h net/if.h net/if_arp.h sys/prctl.h sys/mount.h sys/vfs.h sys/statfs.h sys/timex.h sys/sysinfo.h utime.h linux/ether.h linux/reboot.h)
457
458 AC_CHECK_HEADERS([linux/filter.h linux/netlink.h linux/rtnetlink.h], [], [],
459 [#ifdef HAVE_SYS_SOCKET_H
460 #include <sys/socket.h>
461 #endif
462 ])
463
464 AC_CACHE_CHECK([whether <ustat.h> can be used],
465 [libgo_cv_c_ustat_h],
466 [CFLAGS_hold=$CFLAGS
467 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE $OSCFLAGS"
468 AC_COMPILE_IFELSE(
469 [AC_LANG_SOURCE([
470 #include <sys/types.h>
471 #ifdef HAVE_LINUX_FILTER_H
472 #include <linux/filter.h>
473 #endif
474 #include <ustat.h>
475 ])], [libgo_cv_c_ustat_h=yes], [libgo_cv_c_ustat_h=no])
476 CFLAGS=$CFLAGS_hold])
477 if test $libgo_cv_c_ustat_h = yes; then
478   AC_DEFINE(HAVE_USTAT_H, 1,
479     [Define to 1 if you have the <ustat.h> header file and it works.])
480 fi
481
482 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
483
484 AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv)
485 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
486 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
487
488 AC_CHECK_FUNCS(epoll_create1 faccessat fallocate fchmodat fchownat futimesat inotify_add_watch inotify_init inotify_init1 inotify_rm_watch mkdirat mknodat openat renameat sync_file_range splice tee unlinkat unshare)
489 AC_TYPE_OFF_T
490 AC_CHECK_TYPES([loff_t])
491
492 CFLAGS_hold="$CFLAGS"
493 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
494 LIBS_hold="$LIBS"
495 LIBS="$LIBS $PTHREAD_LIBS"
496 AC_CHECK_FUNCS(sem_timedwait)
497 CFLAGS="$CFLAGS_hold"
498 LIBS="$LIBS_hold"
499
500 LIBS_hold="$LIBS"
501 LIBS="$LIBS $MATH_LIBS"
502 AC_CHECK_FUNCS(matherr)
503 LIBS="$LIBS_hold"
504
505 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4],
506 [libgo_cv_func___sync_bool_compare_and_swap_4],
507 [AC_LINK_IFELSE([
508 typedef unsigned int uint32  __attribute__ ((mode (SI)));
509 uint32 i;
510 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
511 ],
512 [libgo_cv_func___sync_bool_compare_and_swap_4=yes],
513 [libgo_cv_func___sync_bool_compare_and_swap_4=no])])
514 if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then
515   AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1,
516     [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32])
517 fi
518
519 AC_CACHE_CHECK([for __sync_bool_compare_and_swap_8],
520 [libgo_cv_func___sync_bool_compare_and_swap_8],
521 [AC_LINK_IFELSE([
522 typedef unsigned int uint64  __attribute__ ((mode (DI)));
523 uint64 i;
524 int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
525 ],
526 [libgo_cv_func___sync_bool_compare_and_swap_8=yes],
527 [libgo_cv_func___sync_bool_compare_and_swap_8=no])])
528 if test "$libgo_cv_func___sync_bool_compare_and_swap_8" = "yes"; then
529   AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_8, 1,
530     [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint64])
531 fi
532
533 AC_CACHE_CHECK([for __sync_fetch_and_add_4],
534 [libgo_cv_func___sync_fetch_and_add_4],
535 [AC_LINK_IFELSE([
536 typedef unsigned int uint32  __attribute__ ((mode (SI)));
537 uint32 i;
538 int main() { return __sync_fetch_and_add (&i, 1); }
539 ],
540 [libgo_cv_func___sync_fetch_and_add_4=yes],
541 [libgo_cv_func___sync_fetch_and_add_4=no])])
542 if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then
543   AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1,
544     [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32])
545 fi
546
547 AC_CACHE_CHECK([for __sync_add_and_fetch_8],
548 [libgo_cv_func___sync_add_and_fetch_8],
549 [AC_LINK_IFELSE([
550 typedef unsigned int uint64  __attribute__ ((mode (DI)));
551 uint64 i;
552 int main() { return __sync_add_and_fetch (&i, 1); }
553 ],
554 [libgo_cv_func___sync_add_and_fetch_8=yes],
555 [libgo_cv_func___sync_add_and_fetch_8=no])])
556 if test "$libgo_cv_func___sync_add_and_fetch_8" = "yes"; then
557   AC_DEFINE(HAVE_SYNC_ADD_AND_FETCH_8, 1,
558     [Define to 1 if the compiler provides the __sync_add_and_fetch function for uint64])
559 fi
560
561 dnl For x86 we want to use the -minline-all-stringops option to avoid
562 dnl forcing a stack split when calling memcpy and friends.
563 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],
564 [libgo_cv_c_stringops],
565 [CFLAGS_hold=$CFLAGS
566 CFLAGS="$CFLAGS -minline-all-stringops"
567 AC_COMPILE_IFELSE([int i;],
568 [libgo_cv_c_stringops=yes],
569 [libgo_cv_c_stringops=no])
570 CFLAGS=$CFLAGS_hold])
571 STRINGOPS_FLAG=
572 if test "$libgo_cv_c_stringops" = yes; then
573   STRINGOPS_FLAG=-minline-all-stringops
574 fi
575 AC_SUBST(STRINGOPS_FLAG)
576
577 dnl For x86 we want to compile the math library with -mfancy-math-387
578 dnl -funsafe-math-optimizations so that we can use the builtin
579 dnl instructions directly.
580 AC_CACHE_CHECK([whether compiler supports -mfancy-math-387],
581 [libgo_cv_c_fancymath],
582 [CFLAGS_hold=$CFLAGS
583 CFLAGS="$CFLAGS -mfancy-math-387"
584 AC_COMPILE_IFELSE([int i;],
585 [libgo_cv_c_fancymath=yes],
586 [libgo_cv_c_fancymath=no])
587 CFLAGS=$CFLAGS_hold])
588 MATH_FLAG=
589 if test "$libgo_cv_c_fancymath" = yes; then
590   MATH_FLAG="-mfancy-math-387 -funsafe-math-optimizations"
591 fi
592 AC_SUBST(MATH_FLAG)
593
594 CFLAGS_hold=$CFLAGS
595 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
596 AC_CHECK_TYPES([off64_t])
597 CFLAGS=$CFLAGS_hold
598
599 dnl Work out the size of the epoll_events struct on GNU/Linux.
600 AC_CACHE_CHECK([epoll_event size],
601 [libgo_cv_c_epoll_event_size],
602 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_size,
603 [sizeof (struct epoll_event)],
604 [#include <sys/epoll.h>],
605 [libgo_cv_c_epoll_event_size=0])])
606 SIZEOF_STRUCT_EPOLL_EVENT=${libgo_cv_c_epoll_event_size}
607 AC_SUBST(SIZEOF_STRUCT_EPOLL_EVENT)
608
609 dnl Work out the offset of the fd field in the epoll_events struct on
610 dnl GNU/Linux.
611 AC_CACHE_CHECK([epoll_event data.fd offset],
612 [libgo_cv_c_epoll_event_fd_offset],
613 [AC_COMPUTE_INT(libgo_cv_c_epoll_event_fd_offset,
614 [offsetof (struct epoll_event, data.fd)],
615 [#include <stddef.h>
616 #include <sys/epoll.h>],
617 [libgo_cv_c_epoll_event_fd_offset=0])])
618 STRUCT_EPOLL_EVENT_FD_OFFSET=${libgo_cv_c_epoll_event_fd_offset}
619 AC_SUBST(STRUCT_EPOLL_EVENT_FD_OFFSET)
620
621 dnl See if struct exception is defined in <math.h>.
622 AC_CHECK_TYPE([struct exception],
623 [libgo_has_struct_exception=yes],
624 [libgo_has_struct_exception=no],
625 [#include <math.h>])
626 if test "$libgo_has_struct_exception" = "yes"; then
627   AC_DEFINE(HAVE_STRUCT_EXCEPTION, 1,
628             [Define to 1 if <math.h> defines struct exception])
629 fi
630
631 dnl Check if makecontext expects the uc_stack member of ucontext to point
632 dnl to the top of the stack.
633 case "$target" in
634   sparc*-*-solaris2.[[89]]*)
635     libgo_cv_lib_makecontext_stack_top=yes
636     ;;
637   *)
638     libgo_cv_lib_makecontext_stack_top=no
639     ;;
640 esac
641 if test "$libgo_cv_lib_makecontext_stack_top" = "yes"; then
642   AC_DEFINE(MAKECONTEXT_STACK_TOP, 1,
643             [Define if makecontext expects top of stack in uc_stack.])
644 fi
645
646 dnl See whether setcontext changes the value of TLS variables.
647 AC_CACHE_CHECK([whether setcontext clobbers TLS variables],
648 [libgo_cv_lib_setcontext_clobbers_tls],
649 [CFLAGS_hold="$CFLAGS"
650 CFLAGS="$PTHREAD_CFLAGS"
651 LIBS_hold="$LIBS"
652 LIBS="$LIBS $PTHREAD_LIBS"
653 AC_CHECK_SIZEOF([void *])
654 AS_VAR_ARITH([ptr_type_size], [$ac_cv_sizeof_void_p \* 8])
655 AC_RUN_IFELSE(
656   [AC_LANG_SOURCE([
657 #include <pthread.h>
658 #include <stdlib.h>
659 #include <ucontext.h>
660 #include <unistd.h>
661
662 __thread int tls;
663
664 static char stack[[10 * 1024 * 1024]];
665 static ucontext_t c;
666
667 /* Called via makecontext/setcontext.  */
668
669 static void
670 cfn (void)
671 {
672   exit (tls);
673 }
674
675 /* Called via pthread_create.  */
676
677 static void *
678 tfn (void *dummy)
679 {
680   /* The thread should still see this value after calling
681      setcontext.  */
682   tls = 0;
683
684   setcontext (&c);
685
686   /* The call to setcontext should not return.  */
687   abort ();
688 }
689
690 int
691 main ()
692 {
693   pthread_t tid;
694
695   /* The thread should not see this value.  */
696   tls = 1;
697
698   if (getcontext (&c) < 0)
699     abort ();
700
701   c.uc_stack.ss_sp = stack;
702 #ifdef MAKECONTEXT_STACK_TOP
703   c.uc_stack.ss_sp += sizeof stack;
704 #endif
705   c.uc_stack.ss_flags = 0;
706   c.uc_stack.ss_size = sizeof stack;
707   c.uc_link = NULL;
708   makecontext (&c, cfn, 0);
709
710   if (pthread_create (&tid, NULL, tfn, NULL) != 0)
711     abort ();
712
713   if (pthread_join (tid, NULL) != 0)
714     abort ();
715
716   /* The thread should have called exit.  */
717   abort ();
718 }
719 ])],
720 [libgo_cv_lib_setcontext_clobbers_tls=no],
721 [libgo_cv_lib_setcontext_clobbers_tls=yes],
722 [case "$target:$ptr_type_size" in
723   i?86-*-solaris2.1[[01]]:64 | x86_64*-*-solaris2.1[[01]]:64)
724     libgo_cv_lib_setcontext_clobbers_tls=yes ;;
725   *)
726     libgo_cv_lib_setcontext_clobbers_tls=no ;;
727  esac
728 ])
729 CFLAGS="$CFLAGS_hold"
730 LIBS="$LIBS_hold"
731 ])
732 if test "$libgo_cv_lib_setcontext_clobbers_tls" = "yes"; then
733   AC_DEFINE(SETCONTEXT_CLOBBERS_TLS, 1,
734             [Define if setcontext clobbers TLS variables])
735 fi
736
737 AC_CACHE_SAVE
738
739 if test ${multilib} = yes; then
740   multilib_arg="--enable-multilib"
741 else
742   multilib_arg=
743 fi
744
745 AC_CONFIG_FILES(Makefile testsuite/Makefile)
746
747 AC_CONFIG_COMMANDS([default],
748 [if test -n "$CONFIG_FILES"; then
749    # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
750    # that multilib installs will end up installed in the correct place.
751    # The testsuite needs it for multilib-aware ABI baseline files.
752    # To work around this not being passed down from config-ml.in ->
753    # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
754    # append it here.  Only modify Makefiles that have just been created.
755    #
756    # Also, get rid of this simulated-VPATH thing that automake does.
757    cat > vpsed << \_EOF
758 s!`test -f '$<' || echo '$(srcdir)/'`!!
759 _EOF
760    for i in $SUBDIRS; do
761     case $CONFIG_FILES in
762      *${i}/Makefile*)
763        #echo "Adding MULTISUBDIR to $i/Makefile"
764        sed -f vpsed $i/Makefile > tmp
765        grep '^MULTISUBDIR =' Makefile >> tmp
766        mv tmp $i/Makefile
767        ;;
768     esac
769    done
770    rm vpsed
771  fi
772 ],
773 [
774 # Variables needed in config.status (file generation) which aren't already
775 # passed by autoconf.
776 SUBDIRS="$SUBDIRS"
777 ])
778
779 AC_OUTPUT