1 dnl Process this with autoconf to create configure
5 AC_INIT([libffi], [2.1], [http://gcc.gnu.org/bugs.html])
6 AC_CONFIG_HEADERS([fficonfig.h])
8 AM_ENABLE_MULTILIB(, ..)
11 target_alias=${target_alias-$host_alias}
13 . ${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.
22 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
23 m4_define([_AC_ARG_VAR_PRECIOUS],[])
25 m4_rename([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
35 AC_CHECK_HEADERS(sys/mman.h)
37 AC_FUNC_MMAP_BLACKLIST
39 dnl The -no-testsuite modules omit the test subdir.
40 AM_CONDITIONAL(TESTSUBDIR, test -d $srcdir/testsuite)
45 TARGET=ALPHA; TARGETDIR=alpha;
46 # Support 128-bit long double, changable via command-line switch.
47 HAVE_LONG_DOUBLE='defined(__LONG_DOUBLE_128__)'
51 TARGET=ARM; TARGETDIR=arm
55 TARGET=X86_64; TARGETDIR=x86
59 TARGET=LIBFFI_CRIS; TARGETDIR=cris
63 TARGET=FRV; TARGETDIR=frv
67 TARGET=PA_LINUX; TARGETDIR=pa
70 TARGET=PA64_HPUX; TARGETDIR=pa
73 TARGET=PA_HPUX; TARGETDIR=pa
76 i?86-win32* | i?86-*-cygwin* | i?86-*-mingw*)
77 TARGET=X86_WIN32; TARGETDIR=x86
80 TARGET=X86_DARWIN; TARGETDIR=x86
82 i?86-*-solaris2.1[[0-9]]*)
83 TARGET=X86_64; TARGETDIR=x86
86 TARGET=X86; TARGETDIR=x86
90 TARGET=IA64; TARGETDIR=ia64
94 TARGET=M32R; TARGETDIR=m32r
98 TARGET=M68K; TARGETDIR=m68k
101 mips-sgi-irix5.* | mips-sgi-irix6.*)
102 TARGET=MIPS; TARGETDIR=mips
105 TARGET=MIPS; TARGETDIR=mips
109 TARGET=POWERPC; TARGETDIR=powerpc
112 TARGET=POWERPC_DARWIN; TARGETDIR=powerpc
114 powerpc-*-aix* | rs6000-*-aix*)
115 TARGET=POWERPC_AIX; TARGETDIR=powerpc
118 TARGET=POWERPC_FREEBSD; TARGETDIR=powerpc
121 TARGET=POWERPC; TARGETDIR=powerpc
124 s390-*-* | s390x-*-*)
125 TARGET=S390; TARGETDIR=s390
128 sh-*-* | sh[[34]]*-*-*)
129 TARGET=SH; TARGETDIR=sh
132 TARGET=SH64; TARGETDIR=sh64
136 TARGET=SPARC; TARGETDIR=sparc
140 TARGET=X86_DARWIN; TARGETDIR=x86
142 x86_64-*-cygwin* | x86_64-*-mingw*)
145 TARGET=X86_64; TARGETDIR=x86
149 AC_SUBST(AM_RUNTESTFLAGS)
151 if test $TARGETDIR = unknown; then
152 AC_MSG_ERROR(["libffi has not been ported to $host."])
155 AM_CONDITIONAL(MIPS, test x$TARGET = xMIPS)
156 AM_CONDITIONAL(SPARC, test x$TARGET = xSPARC)
157 AM_CONDITIONAL(X86, test x$TARGET = xX86)
158 AM_CONDITIONAL(X86_WIN32, test x$TARGET = xX86_WIN32)
159 AM_CONDITIONAL(X86_DARWIN, test x$TARGET = xX86_DARWIN)
160 AM_CONDITIONAL(ALPHA, test x$TARGET = xALPHA)
161 AM_CONDITIONAL(IA64, test x$TARGET = xIA64)
162 AM_CONDITIONAL(M32R, test x$TARGET = xM32R)
163 AM_CONDITIONAL(M68K, test x$TARGET = xM68K)
164 AM_CONDITIONAL(POWERPC, test x$TARGET = xPOWERPC)
165 AM_CONDITIONAL(POWERPC_AIX, test x$TARGET = xPOWERPC_AIX)
166 AM_CONDITIONAL(POWERPC_DARWIN, test x$TARGET = xPOWERPC_DARWIN)
167 AM_CONDITIONAL(POWERPC_FREEBSD, test x$TARGET = xPOWERPC_FREEBSD)
168 AM_CONDITIONAL(ARM, test x$TARGET = xARM)
169 AM_CONDITIONAL(LIBFFI_CRIS, test x$TARGET = xLIBFFI_CRIS)
170 AM_CONDITIONAL(FRV, test x$TARGET = xFRV)
171 AM_CONDITIONAL(S390, test x$TARGET = xS390)
172 AM_CONDITIONAL(X86_64, test x$TARGET = xX86_64)
173 AM_CONDITIONAL(SH, test x$TARGET = xSH)
174 AM_CONDITIONAL(SH64, test x$TARGET = xSH64)
175 AM_CONDITIONAL(PA_LINUX, test x$TARGET = xPA_LINUX)
176 AM_CONDITIONAL(PA_HPUX, test x$TARGET = xPA_HPUX)
177 AM_CONDITIONAL(PA64_HPUX, test x$TARGET = xPA64_HPUX)
180 AC_CHECK_FUNCS(memcpy)
183 AC_CHECK_SIZEOF(double)
184 AC_CHECK_SIZEOF(long double)
186 # Also AC_SUBST this variable for ffi.h.
187 if test -z "$HAVE_LONG_DOUBLE"; then
189 if test $ac_cv_sizeof_double != $ac_cv_sizeof_long_double; then
190 if test $ac_cv_sizeof_long_double != 0; then
192 AC_DEFINE(HAVE_LONG_DOUBLE, 1, [Define if you have the long double type and it is bigger than a double])
196 AC_SUBST(HAVE_LONG_DOUBLE)
200 AC_CACHE_CHECK([assembler .cfi pseudo-op support],
201 libffi_cv_as_cfi_pseudo_op, [
202 libffi_cv_as_cfi_pseudo_op=unknown
203 AC_TRY_COMPILE([asm (".cfi_startproc\n\t.cfi_endproc");],,
204 [libffi_cv_as_cfi_pseudo_op=yes],
205 [libffi_cv_as_cfi_pseudo_op=no])
207 if test "x$libffi_cv_as_cfi_pseudo_op" = xyes; then
208 AC_DEFINE(HAVE_AS_CFI_PSEUDO_OP, 1,
209 [Define if your assembler supports .cfi_* directives.])
212 if test x$TARGET = xSPARC; then
213 AC_CACHE_CHECK([assembler and linker support unaligned pc related relocs],
214 libffi_cv_as_sparc_ua_pcrel, [
215 save_CFLAGS="$CFLAGS"
216 save_LDFLAGS="$LDFLAGS"
217 CFLAGS="$CFLAGS -fpic"
218 LDFLAGS="$LDFLAGS -shared"
219 AC_TRY_LINK([asm (".text; foo: nop; .data; .align 4; .byte 0; .uaword %r_disp32(foo); .text");],,
220 [libffi_cv_as_sparc_ua_pcrel=yes],
221 [libffi_cv_as_sparc_ua_pcrel=no])
222 CFLAGS="$save_CFLAGS"
223 LDFLAGS="$save_LDFLAGS"])
224 if test "x$libffi_cv_as_sparc_ua_pcrel" = xyes; then
225 AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
226 [Define if your assembler and linker support unaligned PC relative relocs.])
229 AC_CACHE_CHECK([assembler .register pseudo-op support],
230 libffi_cv_as_register_pseudo_op, [
231 libffi_cv_as_register_pseudo_op=unknown
232 # Check if we have .register
233 AC_TRY_COMPILE([asm (".register %g2, #scratch");],,
234 [libffi_cv_as_register_pseudo_op=yes],
235 [libffi_cv_as_register_pseudo_op=no])
237 if test "x$libffi_cv_as_register_pseudo_op" = xyes; then
238 AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
239 [Define if your assembler supports .register.])
243 if test x$TARGET = xX86 || test x$TARGET = xX86_64; then
244 AC_CACHE_CHECK([assembler supports pc related relocs],
245 libffi_cv_as_x86_pcrel, [
246 libffi_cv_as_x86_pcrel=yes
247 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
248 if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
249 libffi_cv_as_x86_pcrel=no
252 if test "x$libffi_cv_as_x86_pcrel" = xyes; then
253 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
254 [Define if your assembler supports PC relative relocs.])
258 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
259 libffi_cv_ro_eh_frame, [
260 libffi_cv_ro_eh_frame=no
261 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
262 if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
263 if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
264 libffi_cv_ro_eh_frame=yes
265 elif grep '.section.*eh_frame.*#alloc' conftest.c \
266 | grep -v '#write' > /dev/null; then
267 libffi_cv_ro_eh_frame=yes
272 if test "x$libffi_cv_ro_eh_frame" = xyes; then
273 AC_DEFINE(HAVE_RO_EH_FRAME, 1,
274 [Define if .eh_frame sections should be read-only.])
275 AC_DEFINE(EH_FRAME_FLAGS, "a",
276 [Define to the flags needed for the .section .eh_frame directive.])
278 AC_DEFINE(EH_FRAME_FLAGS, "aw",
279 [Define to the flags needed for the .section .eh_frame directive.])
282 AC_CACHE_CHECK([for __attribute__((visibility("hidden")))],
283 libffi_cv_hidden_visibility_attribute, [
284 echo 'int __attribute__ ((visibility ("hidden"))) foo (void) { return 1; }' > conftest.c
285 libffi_cv_hidden_visibility_attribute=no
286 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
287 if grep '\.hidden.*foo' conftest.s >/dev/null; then
288 libffi_cv_hidden_visibility_attribute=yes
293 if test $libffi_cv_hidden_visibility_attribute = yes; then
294 AC_DEFINE(HAVE_HIDDEN_VISIBILITY_ATTRIBUTE, 1,
295 [Define if __attribute__((visibility("hidden"))) is supported.])
299 #ifdef HAVE_HIDDEN_VISIBILITY_ATTRIBUTE
301 #define FFI_HIDDEN(name) .hidden name
303 #define FFI_HIDDEN __attribute__ ((visibility ("hidden")))
307 #define FFI_HIDDEN(name)
320 [ --enable-debug debugging mode],
321 if test "$enable_debug" = "yes"; then
322 AC_DEFINE(FFI_DEBUG, 1, [Define this if you want extra debugging.])
325 AC_ARG_ENABLE(structs,
326 [ --disable-structs omit code for struct support],
327 if test "$enable_structs" = "no"; then
328 AC_DEFINE(FFI_NO_STRUCTS, 1, [Define this is you do not want support for aggregate types.])
331 AC_ARG_ENABLE(raw-api,
332 [ --disable-raw-api make the raw api unavailable],
333 if test "$enable_raw_api" = "no"; then
334 AC_DEFINE(FFI_NO_RAW_API, 1, [Define this is you do not want support for the raw API.])
337 AC_ARG_ENABLE(purify-safety,
338 [ --enable-purify-safety purify-safe mode],
339 if test "$enable_purify_safety" = "yes"; then
340 AC_DEFINE(USING_PURIFY, 1, [Define this if you are using Purify and want to suppress spurious messages.])
343 if test -n "$with_cross_host" &&
344 test x"$with_cross_host" != x"no"; then
345 toolexecdir='$(exec_prefix)/$(target_alias)'
346 toolexeclibdir='$(toolexecdir)/lib'
348 toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
349 toolexeclibdir='$(libdir)'
351 multi_os_directory=`$CC -print-multi-os-directory`
352 case $multi_os_directory in
353 .) ;; # Avoid trailing /.
354 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
356 AC_SUBST(toolexecdir)
357 AC_SUBST(toolexeclibdir)
359 if test "${multilib}" = "yes"; then
360 multilib_arg="--enable-multilib"
365 AC_CONFIG_COMMANDS(include, [test -d include || mkdir include])
366 AC_CONFIG_COMMANDS(src, [
367 test -d src || mkdir src
368 test -d src/$TARGETDIR || mkdir src/$TARGETDIR
369 ], [TARGETDIR="$TARGETDIR"])
371 AC_CONFIG_LINKS(include/ffitarget.h:src/$TARGETDIR/ffitarget.h)
373 AC_CONFIG_FILES(include/Makefile include/ffi.h Makefile testsuite/Makefile)