1 dnl Process this with autoconf to create configure
5 AC_INIT([libffi], [3.0.12-rc0], [http://gcc.gnu.org/bugs.html])
6 AC_CONFIG_HEADERS([fficonfig.h])
9 target_alias=${target_alias-$host_alias}
11 . ${srcdir}/configure.host
17 # The same as in boehm-gc and libstdc++. Have to borrow it from there.
18 # We must force CC to /not/ be precious variables; otherwise
19 # the wrong, non-multilib-adjusted value will be used in multilibs.
20 # As a side effect, we have to subst CFLAGS ourselves.
21 # Also save and restore CFLAGS, since AC_PROG_CC will come up with
22 # defaults of its own if none are provided.
24 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
25 m4_define([_AC_ARG_VAR_PRECIOUS],[])
29 m4_undefine([_AC_ARG_VAR_PRECIOUS])
30 m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
37 AC_CONFIG_MACRO_DIR([m4])
41 if test "x$GCC" = "xyes"; then
42 CFLAGS="$CFLAGS -fexceptions"
43 touch testsuite/local.exp
52 AC_CHECK_HEADERS(sys/mman.h)
54 AC_FUNC_MMAP_BLACKLIST
56 dnl The -no-testsuite modules omit the test subdir.
57 AM_CONDITIONAL(TESTSUBDIR, test -d $srcdir/testsuite)
62 TARGET=AARCH64; TARGETDIR=aarch64
66 TARGET=ALPHA; TARGETDIR=alpha;
67 # Support 128-bit long double, changeable via command-line switch.
68 HAVE_LONG_DOUBLE='defined(__LONG_DOUBLE_128__)'
72 TARGET=ARM; TARGETDIR=arm
75 amd64-*-freebsd* | amd64-*-openbsd*)
76 TARGET=X86_64; TARGETDIR=x86
80 TARGET=X86_64; TARGETDIR=x86
84 TARGET=X86_64; TARGETDIR=x86
88 TARGET=AVR32; TARGETDIR=avr32
92 TARGET=BFIN; TARGETDIR=bfin
96 TARGET=LIBFFI_CRIS; TARGETDIR=cris
100 TARGET=FRV; TARGETDIR=frv
103 hppa*-*-linux* | parisc*-*-linux* | hppa*-*-openbsd*)
104 TARGET=PA_LINUX; TARGETDIR=pa
107 TARGET=PA64_HPUX; TARGETDIR=pa
110 TARGET=PA_HPUX; TARGETDIR=pa
113 i?86-*-freebsd* | i?86-*-openbsd*)
114 TARGET=X86_FREEBSD; TARGETDIR=x86
116 i?86-win32* | i?86-*-cygwin* | i?86-*-mingw* | i?86-*-os2* | i?86-*-interix*)
117 TARGET=X86_WIN32; TARGETDIR=x86
118 # All mingw/cygwin/win32 builds require -no-undefined for sharedlib.
119 # We must also check with_cross_host to decide if this is a native
120 # or cross-build and select where to install dlls appropriately.
121 if test -n "$with_cross_host" &&
122 test x"$with_cross_host" != x"no"; then
123 AM_LTLDFLAGS='-no-undefined -bindir "$(toolexeclibdir)"';
125 AM_LTLDFLAGS='-no-undefined -bindir "$(bindir)"';
129 TARGET=X86_DARWIN; TARGETDIR=x86
131 i?86-*-solaris2.1[[0-9]]*)
132 TARGET=X86; TARGETDIR=x86
135 TARGET=X86_64; TARGETDIR=x86
139 TARGET=IA64; TARGETDIR=ia64
143 TARGET=M32R; TARGETDIR=m32r
147 TARGET=M68K; TARGETDIR=m68k
150 mips-sgi-irix5.* | mips-sgi-irix6.* | mips*-*-rtems*)
151 TARGET=MIPS; TARGETDIR=mips
153 mips*-*-linux* | mips*-*-openbsd*)
154 # Support 128-bit long double for NewABI.
155 HAVE_LONG_DOUBLE='defined(__mips64)'
156 TARGET=MIPS; TARGETDIR=mips
159 powerpc*-*-linux* | powerpc-*-sysv*)
160 TARGET=POWERPC; TARGETDIR=powerpc
163 TARGET=POWERPC; TARGETDIR=powerpc
166 TARGET=POWERPC; TARGETDIR=powerpc
168 powerpc-*-darwin* | powerpc64-*-darwin*)
169 TARGET=POWERPC_DARWIN; TARGETDIR=powerpc
171 powerpc-*-aix* | rs6000-*-aix*)
172 TARGET=POWERPC_AIX; TARGETDIR=powerpc
174 powerpc-*-freebsd* | powerpc-*-openbsd*)
175 TARGET=POWERPC_FREEBSD; TARGETDIR=powerpc
177 powerpc64-*-freebsd*)
178 TARGET=POWERPC; TARGETDIR=powerpc
181 TARGET=POWERPC; TARGETDIR=powerpc
184 s390-*-* | s390x-*-*)
185 TARGET=S390; TARGETDIR=s390
188 sh-*-* | sh[[34]]*-*-*)
189 TARGET=SH; TARGETDIR=sh
192 TARGET=SH64; TARGETDIR=sh64
196 TARGET=SPARC; TARGETDIR=sparc
200 TARGET=TILE; TARGETDIR=tile
204 TARGET=X86_DARWIN; TARGETDIR=x86
207 x86_64-*-cygwin* | x86_64-*-mingw*)
208 TARGET=X86_WIN64; TARGETDIR=x86
209 # All mingw/cygwin/win32 builds require -no-undefined for sharedlib.
210 # We must also check with_cross_host to decide if this is a native
211 # or cross-build and select where to install dlls appropriately.
212 if test -n "$with_cross_host" &&
213 test x"$with_cross_host" != x"no"; then
214 AM_LTLDFLAGS='-no-undefined -bindir "$(toolexeclibdir)"';
216 AM_LTLDFLAGS='-no-undefined -bindir "$(bindir)"';
221 TARGET=X86_64; TARGETDIR=x86
225 AC_SUBST(AM_RUNTESTFLAGS)
226 AC_SUBST(AM_LTLDFLAGS)
228 if test $TARGETDIR = unknown; then
229 AC_MSG_ERROR(["libffi has not been ported to $host."])
232 AM_CONDITIONAL(MIPS, test x$TARGET = xMIPS)
233 AM_CONDITIONAL(BFIN, test x$TARGET = xBFIN)
234 AM_CONDITIONAL(SPARC, test x$TARGET = xSPARC)
235 AM_CONDITIONAL(X86, test x$TARGET = xX86)
236 AM_CONDITIONAL(X86_FREEBSD, test x$TARGET = xX86_FREEBSD)
237 AM_CONDITIONAL(X86_WIN32, test x$TARGET = xX86_WIN32)
238 AM_CONDITIONAL(X86_WIN64, test x$TARGET = xX86_WIN64)
239 AM_CONDITIONAL(X86_DARWIN, test x$TARGET = xX86_DARWIN)
240 AM_CONDITIONAL(ALPHA, test x$TARGET = xALPHA)
241 AM_CONDITIONAL(IA64, test x$TARGET = xIA64)
242 AM_CONDITIONAL(M32R, test x$TARGET = xM32R)
243 AM_CONDITIONAL(M68K, test x$TARGET = xM68K)
244 AM_CONDITIONAL(MOXIE, test x$TARGET = xMOXIE)
245 AM_CONDITIONAL(POWERPC, test x$TARGET = xPOWERPC)
246 AM_CONDITIONAL(POWERPC_AIX, test x$TARGET = xPOWERPC_AIX)
247 AM_CONDITIONAL(POWERPC_DARWIN, test x$TARGET = xPOWERPC_DARWIN)
248 AM_CONDITIONAL(POWERPC_FREEBSD, test x$TARGET = xPOWERPC_FREEBSD)
249 AM_CONDITIONAL(AARCH64, test x$TARGET = xAARCH64)
250 AM_CONDITIONAL(ARM, test x$TARGET = xARM)
251 AM_CONDITIONAL(AVR32, test x$TARGET = xAVR32)
252 AM_CONDITIONAL(LIBFFI_CRIS, test x$TARGET = xLIBFFI_CRIS)
253 AM_CONDITIONAL(FRV, test x$TARGET = xFRV)
254 AM_CONDITIONAL(S390, test x$TARGET = xS390)
255 AM_CONDITIONAL(X86_64, test x$TARGET = xX86_64)
256 AM_CONDITIONAL(SH, test x$TARGET = xSH)
257 AM_CONDITIONAL(SH64, test x$TARGET = xSH64)
258 AM_CONDITIONAL(PA_LINUX, test x$TARGET = xPA_LINUX)
259 AM_CONDITIONAL(PA_HPUX, test x$TARGET = xPA_HPUX)
260 AM_CONDITIONAL(PA64_HPUX, test x$TARGET = xPA64_HPUX)
261 AM_CONDITIONAL(TILE, test x$TARGET = xTILE)
264 AC_CHECK_FUNCS(memcpy)
267 AC_CHECK_SIZEOF(double)
268 AC_CHECK_SIZEOF(long double)
270 # Also AC_SUBST this variable for ffi.h.
271 if test -z "$HAVE_LONG_DOUBLE"; then
273 if test $ac_cv_sizeof_double != $ac_cv_sizeof_long_double; then
274 if test $ac_cv_sizeof_long_double != 0; then
276 AC_DEFINE(HAVE_LONG_DOUBLE, 1, [Define if you have the long double type and it is bigger than a double])
280 AC_SUBST(HAVE_LONG_DOUBLE)
286 if test x$TARGET = xSPARC; then
287 AC_CACHE_CHECK([assembler and linker support unaligned pc related relocs],
288 libffi_cv_as_sparc_ua_pcrel, [
289 save_CFLAGS="$CFLAGS"
290 save_LDFLAGS="$LDFLAGS"
291 CFLAGS="$CFLAGS -fpic"
292 LDFLAGS="$LDFLAGS -shared"
293 AC_TRY_LINK([asm (".text; foo: nop; .data; .align 4; .byte 0; .uaword %r_disp32(foo); .text");],,
294 [libffi_cv_as_sparc_ua_pcrel=yes],
295 [libffi_cv_as_sparc_ua_pcrel=no])
296 CFLAGS="$save_CFLAGS"
297 LDFLAGS="$save_LDFLAGS"])
298 if test "x$libffi_cv_as_sparc_ua_pcrel" = xyes; then
299 AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
300 [Define if your assembler and linker support unaligned PC relative relocs.])
303 AC_CACHE_CHECK([assembler .register pseudo-op support],
304 libffi_cv_as_register_pseudo_op, [
305 libffi_cv_as_register_pseudo_op=unknown
306 # Check if we have .register
307 AC_TRY_COMPILE([asm (".register %g2, #scratch");],,
308 [libffi_cv_as_register_pseudo_op=yes],
309 [libffi_cv_as_register_pseudo_op=no])
311 if test "x$libffi_cv_as_register_pseudo_op" = xyes; then
312 AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
313 [Define if your assembler supports .register.])
317 if test x$TARGET = xX86 || test x$TARGET = xX86_WIN32 || test x$TARGET = xX86_64; then
318 AC_CACHE_CHECK([assembler supports pc related relocs],
319 libffi_cv_as_x86_pcrel, [
320 libffi_cv_as_x86_pcrel=yes
321 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
322 if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
323 libffi_cv_as_x86_pcrel=no
326 if test "x$libffi_cv_as_x86_pcrel" = xyes; then
327 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
328 [Define if your assembler supports PC relative relocs.])
331 AC_CACHE_CHECK([assembler .ascii pseudo-op support],
332 libffi_cv_as_ascii_pseudo_op, [
333 libffi_cv_as_ascii_pseudo_op=unknown
334 # Check if we have .ascii
335 AC_TRY_COMPILE([asm (".ascii \\"string\\"");],,
336 [libffi_cv_as_ascii_pseudo_op=yes],
337 [libffi_cv_as_ascii_pseudo_op=no])
339 if test "x$libffi_cv_as_ascii_pseudo_op" = xyes; then
340 AC_DEFINE(HAVE_AS_ASCII_PSEUDO_OP, 1,
341 [Define if your assembler supports .ascii.])
344 AC_CACHE_CHECK([assembler .string pseudo-op support],
345 libffi_cv_as_string_pseudo_op, [
346 libffi_cv_as_string_pseudo_op=unknown
347 # Check if we have .string
348 AC_TRY_COMPILE([asm (".string \\"string\\"");],,
349 [libffi_cv_as_string_pseudo_op=yes],
350 [libffi_cv_as_string_pseudo_op=no])
352 if test "x$libffi_cv_as_string_pseudo_op" = xyes; then
353 AC_DEFINE(HAVE_AS_STRING_PSEUDO_OP, 1,
354 [Define if your assembler supports .string.])
358 # On PaX enable kernels that have MPROTECT enable we can't use PROT_EXEC.
359 AC_ARG_ENABLE(pax_emutramp,
360 [ --enable-pax_emutramp enable pax emulated trampolines, for we can't use PROT_EXEC],
361 if test "$enable_pax_emutramp" = "yes"; then
362 AC_DEFINE(FFI_MMAP_EXEC_EMUTRAMP_PAX, 1,
363 [Define this if you want to enable pax emulated trampolines])
366 if test x$TARGET = xX86_WIN64; then
368 if test "x$sys_symbol_underscore" = xyes; then
369 AC_DEFINE(SYMBOL_UNDERSCORE, 1, [Define if symbols are underscored.])
373 FFI_EXEC_TRAMPOLINE_TABLE=0
376 FFI_EXEC_TRAMPOLINE_TABLE=1
377 AC_DEFINE(FFI_EXEC_TRAMPOLINE_TABLE, 1,
378 [Cannot use PROT_EXEC on this target, so, we revert to
381 *-apple-darwin1* | *-*-freebsd* | *-*-kfreebsd* | *-*-openbsd* | *-pc-solaris*)
382 AC_DEFINE(FFI_MMAP_EXEC_WRIT, 1,
383 [Cannot use malloc on this target, so, we revert to
387 AM_CONDITIONAL(FFI_EXEC_TRAMPOLINE_TABLE, test x$FFI_EXEC_TRAMPOLINE_TABLE = x1)
388 AC_SUBST(FFI_EXEC_TRAMPOLINE_TABLE)
390 if test x$TARGET = xX86_64; then
391 AC_CACHE_CHECK([assembler supports unwind section type],
392 libffi_cv_as_x86_64_unwind_section_type, [
393 libffi_cv_as_x86_64_unwind_section_type=yes
394 echo '.section .eh_frame,"a",@unwind' > conftest.s
395 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
396 libffi_cv_as_x86_64_unwind_section_type=no
399 if test "x$libffi_cv_as_x86_64_unwind_section_type" = xyes; then
400 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
401 [Define if your assembler supports unwind section type.])
405 if test "x$GCC" = "xyes"; then
406 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
407 libffi_cv_ro_eh_frame, [
408 libffi_cv_ro_eh_frame=no
409 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
410 if $CC $CFLAGS -c -fpic -fexceptions -o conftest.o conftest.c > /dev/null 2>&1; then
411 objdump -h conftest.o > conftest.dump 2>&1
412 libffi_eh_frame_line=`grep -n eh_frame conftest.dump | cut -d: -f 1`
413 libffi_test_line=`expr $libffi_eh_frame_line + 1`p
414 sed -n $libffi_test_line conftest.dump > conftest.line
415 if grep READONLY conftest.line > /dev/null; then
416 libffi_cv_ro_eh_frame=yes
421 if test "x$libffi_cv_ro_eh_frame" = xyes; then
422 AC_DEFINE(HAVE_RO_EH_FRAME, 1,
423 [Define if .eh_frame sections should be read-only.])
424 AC_DEFINE(EH_FRAME_FLAGS, "a",
425 [Define to the flags needed for the .section .eh_frame directive. ])
427 AC_DEFINE(EH_FRAME_FLAGS, "aw",
428 [Define to the flags needed for the .section .eh_frame directive. ])
431 AC_CACHE_CHECK([for __attribute__((visibility("hidden")))],
432 libffi_cv_hidden_visibility_attribute, [
433 echo 'int __attribute__ ((visibility ("hidden"))) foo (void) { return 1 ; }' > conftest.c
434 libffi_cv_hidden_visibility_attribute=no
435 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
436 if grep '\.hidden.*foo' conftest.s >/dev/null; then
437 libffi_cv_hidden_visibility_attribute=yes
442 if test $libffi_cv_hidden_visibility_attribute = yes; then
443 AC_DEFINE(HAVE_HIDDEN_VISIBILITY_ATTRIBUTE, 1,
444 [Define if __attribute__((visibility("hidden"))) is supported.])
449 #ifdef HAVE_HIDDEN_VISIBILITY_ATTRIBUTE
451 #define FFI_HIDDEN(name) .hidden name
453 #define FFI_HIDDEN __attribute__ ((visibility ("hidden")))
457 #define FFI_HIDDEN(name)
470 [ --enable-debug debugging mode],
471 if test "$enable_debug" = "yes"; then
472 AC_DEFINE(FFI_DEBUG, 1, [Define this if you want extra debugging.])
474 AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes")
476 AC_ARG_ENABLE(structs,
477 [ --disable-structs omit code for struct support],
478 if test "$enable_structs" = "no"; then
479 AC_DEFINE(FFI_NO_STRUCTS, 1, [Define this is you do not want support for aggregate types.])
481 AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes")
483 AC_ARG_ENABLE(raw-api,
484 [ --disable-raw-api make the raw api unavailable],
485 if test "$enable_raw_api" = "no"; then
486 AC_DEFINE(FFI_NO_RAW_API, 1, [Define this is you do not want support for the raw API.])
489 AC_ARG_ENABLE(purify-safety,
490 [ --enable-purify-safety purify-safe mode],
491 if test "$enable_purify_safety" = "yes"; then
492 AC_DEFINE(USING_PURIFY, 1, [Define this if you are using Purify and want to suppress spurious messages.])
495 # These variables are only ever used when we cross-build to X86_WIN32.
496 # And we only support this with GCC, so...
497 if test x"$GCC" != x"no"; then
498 if test -n "$with_cross_host" &&
499 test x"$with_cross_host" != x"no"; then
500 toolexecdir='$(exec_prefix)/$(target_alias)'
501 toolexeclibdir='$(toolexecdir)/lib'
503 toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
504 toolexeclibdir='$(libdir)'
506 multi_os_directory=`$CC -print-multi-os-directory`
507 case $multi_os_directory in
508 .) ;; # Avoid trailing /.
509 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
511 AC_SUBST(toolexecdir)
512 AC_SUBST(toolexeclibdir)
515 AC_CONFIG_COMMANDS(include, [test -d include || mkdir include])
516 AC_CONFIG_COMMANDS(src, [
517 test -d src || mkdir src
518 test -d src/$TARGETDIR || mkdir src/$TARGETDIR
519 ], [TARGETDIR="$TARGETDIR"])
521 AC_CONFIG_LINKS(include/ffitarget.h:src/$TARGETDIR/ffitarget.h)
523 AC_CONFIG_FILES(include/Makefile include/ffi.h Makefile testsuite/Makefile man/Makefile libffi.pc)