1 dnl Process this with autoconf to create configure
5 AC_INIT([libffi], [3.99999], [http://github.com/atgreen/libffi/issues])
6 AC_CONFIG_HEADERS([fficonfig.h])
8 AM_ENABLE_MULTILIB(, ..)
11 target_alias=${target_alias-$host_alias}
13 AM_INIT_AUTOMAKE([no-dist])
15 # See if makeinfo has been installed and is modern enough
17 ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version],
18 [GNU texinfo.* \([0-9][0-9.]*\)],
19 [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
20 AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes")
22 # We would like our source tree to be readonly. However when releases or
23 # pre-releases are generated, the flex/bison generated files as well as the
24 # various formats of manuals need to be included along with the rest of the
25 # sources. Therefore we have --enable-generated-files-in-srcdir to do
27 AC_MSG_CHECKING(generated-files-in-srcdir)
28 AC_ARG_ENABLE(generated-files-in-srcdir,
29 AS_HELP_STRING([--enable-generated-files-in-srcdir],
30 [put copies of generated files in source dir intended for creating source tarballs for users without texinfo bison or flex]),
32 yes) enable_generated_files_in_srcdir=yes ;;
33 no) enable_generated_files_in_srcdir=no ;;
34 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
36 [enable_generated_files_in_srcdir=no])
37 AC_MSG_RESULT($enable_generated_files_in_srcdir)
38 AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes)
40 # The same as in boehm-gc and libstdc++. Have to borrow it from there.
41 # We must force CC to /not/ be precious variables; otherwise
42 # the wrong, non-multilib-adjusted value will be used in multilibs.
43 # As a side effect, we have to subst CFLAGS ourselves.
44 # Also save and restore CFLAGS, since AC_PROG_CC will come up with
45 # defaults of its own if none are provided.
47 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
48 m4_define([_AC_ARG_VAR_PRECIOUS],[])
53 m4_undefine([_AC_ARG_VAR_PRECIOUS])
54 m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
62 # Test for 64-bit build.
63 AC_CHECK_SIZEOF([size_t])
67 AC_CHECK_HEADERS(sys/mman.h)
68 AC_CHECK_FUNCS([mmap mkostemp])
69 AC_FUNC_MMAP_BLACKLIST
71 dnl The -no-testsuite modules omit the test subdir.
72 AM_CONDITIONAL(TESTSUBDIR, test -d $srcdir/testsuite)
75 HAVE_LONG_DOUBLE_VARIANT=0
77 . ${srcdir}/configure.host
79 if test -n "${UNSUPPORTED}"; then
80 AC_MSG_ERROR(["libffi has not been ported to $host."])
83 AC_SUBST(AM_RUNTESTFLAGS)
84 AC_SUBST(AM_LTLDFLAGS)
87 AC_CHECK_FUNCS(memcpy)
90 AC_CHECK_SIZEOF(double)
91 AC_CHECK_SIZEOF(long double)
93 # Also AC_SUBST this variable for ffi.h.
94 if test -z "$HAVE_LONG_DOUBLE"; then
96 if test $ac_cv_sizeof_long_double != 0; then
97 if test $HAVE_LONG_DOUBLE_VARIANT != 0; then
98 AC_DEFINE(HAVE_LONG_DOUBLE_VARIANT, 1, [Define if you support more than one size of the long double type])
101 if test $ac_cv_sizeof_double != $ac_cv_sizeof_long_double; then
103 AC_DEFINE(HAVE_LONG_DOUBLE, 1, [Define if you have the long double type and it is bigger than a double])
108 AC_SUBST(HAVE_LONG_DOUBLE)
109 AC_SUBST(HAVE_LONG_DOUBLE_VARIANT)
115 if test x$TARGET = xSPARC; then
116 AC_CACHE_CHECK([assembler and linker support unaligned pc related relocs],
117 libffi_cv_as_sparc_ua_pcrel, [
118 save_CFLAGS="$CFLAGS"
119 save_LDFLAGS="$LDFLAGS"
120 CFLAGS="$CFLAGS -fpic"
121 LDFLAGS="$LDFLAGS -shared"
122 AC_TRY_LINK([asm (".text; foo: nop; .data; .align 4; .byte 0; .uaword %r_disp32(foo); .text");],,
123 [libffi_cv_as_sparc_ua_pcrel=yes],
124 [libffi_cv_as_sparc_ua_pcrel=no])
125 CFLAGS="$save_CFLAGS"
126 LDFLAGS="$save_LDFLAGS"])
127 if test "x$libffi_cv_as_sparc_ua_pcrel" = xyes; then
128 AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
129 [Define if your assembler and linker support unaligned PC relative relocs.])
132 AC_CACHE_CHECK([assembler .register pseudo-op support],
133 libffi_cv_as_register_pseudo_op, [
134 libffi_cv_as_register_pseudo_op=unknown
135 # Check if we have .register
136 AC_TRY_COMPILE(,[asm (".register %g2, #scratch");],
137 [libffi_cv_as_register_pseudo_op=yes],
138 [libffi_cv_as_register_pseudo_op=no])
140 if test "x$libffi_cv_as_register_pseudo_op" = xyes; then
141 AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
142 [Define if your assembler supports .register.])
146 if test x$TARGET = xX86 || test x$TARGET = xX86_WIN32 || test x$TARGET = xX86_64; then
147 AC_CACHE_CHECK([assembler supports pc related relocs],
148 libffi_cv_as_x86_pcrel, [
149 libffi_cv_as_x86_pcrel=no
150 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
151 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
152 libffi_cv_as_x86_pcrel=yes
155 if test "x$libffi_cv_as_x86_pcrel" = xyes; then
156 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
157 [Define if your assembler supports PC relative relocs.])
160 AC_CACHE_CHECK([assembler .ascii pseudo-op support],
161 libffi_cv_as_ascii_pseudo_op, [
162 libffi_cv_as_ascii_pseudo_op=unknown
163 # Check if we have .ascii
164 AC_TRY_COMPILE(,[asm (".ascii \\"string\\"");],
165 [libffi_cv_as_ascii_pseudo_op=yes],
166 [libffi_cv_as_ascii_pseudo_op=no])
168 if test "x$libffi_cv_as_ascii_pseudo_op" = xyes; then
169 AC_DEFINE(HAVE_AS_ASCII_PSEUDO_OP, 1,
170 [Define if your assembler supports .ascii.])
173 AC_CACHE_CHECK([assembler .string pseudo-op support],
174 libffi_cv_as_string_pseudo_op, [
175 libffi_cv_as_string_pseudo_op=unknown
176 # Check if we have .string
177 AC_TRY_COMPILE(,[asm (".string \\"string\\"");],
178 [libffi_cv_as_string_pseudo_op=yes],
179 [libffi_cv_as_string_pseudo_op=no])
181 if test "x$libffi_cv_as_string_pseudo_op" = xyes; then
182 AC_DEFINE(HAVE_AS_STRING_PSEUDO_OP, 1,
183 [Define if your assembler supports .string.])
187 if test x$TARGET = xS390; then
188 AC_CACHE_CHECK([compiler uses zarch features],
189 libffi_cv_as_s390_zarch, [
190 libffi_cv_as_s390_zarch=no
191 echo 'void foo(void) { bar(); bar(); }' > conftest.c
192 if $CC $CFLAGS -S conftest.c > /dev/null 2>&1; then
193 if grep -q brasl conftest.s; then
194 libffi_cv_as_s390_zarch=yes
198 if test "x$libffi_cv_as_s390_zarch" = xyes; then
199 AC_DEFINE(HAVE_AS_S390_ZARCH, 1,
200 [Define if the compiler uses zarch features.])
204 # On PaX enable kernels that have MPROTECT enable we can't use PROT_EXEC.
205 AC_ARG_ENABLE(pax_emutramp,
206 [ --enable-pax_emutramp enable pax emulated trampolines, for we can't use PROT_EXEC],
207 if test "$enable_pax_emutramp" = "yes"; then
208 AC_DEFINE(FFI_MMAP_EXEC_EMUTRAMP_PAX, 1,
209 [Define this if you want to enable pax emulated trampolines])
212 FFI_EXEC_TRAMPOLINE_TABLE=0
215 FFI_EXEC_TRAMPOLINE_TABLE=1
216 AC_DEFINE(FFI_EXEC_TRAMPOLINE_TABLE, 1,
217 [Cannot use PROT_EXEC on this target, so, we revert to
220 *-apple-darwin1* | *-*-freebsd* | *-*-kfreebsd* | *-*-openbsd* | *-pc-solaris*)
221 AC_DEFINE(FFI_MMAP_EXEC_WRIT, 1,
222 [Cannot use malloc on this target, so, we revert to
226 AM_CONDITIONAL(FFI_EXEC_TRAMPOLINE_TABLE, test x$FFI_EXEC_TRAMPOLINE_TABLE = x1)
227 AC_SUBST(FFI_EXEC_TRAMPOLINE_TABLE)
229 if test x$TARGET = xX86_64; then
230 AC_CACHE_CHECK([toolchain supports unwind section type],
231 libffi_cv_as_x86_64_unwind_section_type, [
232 cat > conftest1.s << EOF
237 .section .eh_frame,"a",@unwind
241 cat > conftest2.c << EOF
246 libffi_cv_as_x86_64_unwind_section_type=no
247 # we ensure that we can compile _and_ link an assembly file containing an @unwind section
248 # since the compiler can support it and not the linker (ie old binutils)
249 if $CC -Wa,--fatal-warnings $CFLAGS -c conftest1.s > /dev/null 2>&1 && \
250 $CC conftest2.c conftest1.o > /dev/null 2>&1 ; then
251 libffi_cv_as_x86_64_unwind_section_type=yes
254 if test "x$libffi_cv_as_x86_64_unwind_section_type" = xyes; then
255 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
256 [Define if your assembler supports unwind section type.])
260 if test "x$GCC" = "xyes"; then
261 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
262 libffi_cv_ro_eh_frame, [
263 libffi_cv_ro_eh_frame=no
264 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
265 if $CC $CFLAGS -c -fpic -fexceptions -o conftest.o conftest.c > /dev/null 2>&1; then
266 objdump -h conftest.o > conftest.dump 2>&1
267 libffi_eh_frame_line=`grep -n eh_frame conftest.dump | cut -d: -f 1`
268 if test "x$libffi_eh_frame_line" != "x"; then
269 libffi_test_line=`expr $libffi_eh_frame_line + 1`p
270 sed -n $libffi_test_line conftest.dump > conftest.line
271 if grep READONLY conftest.line > /dev/null; then
272 libffi_cv_ro_eh_frame=yes
278 if test "x$libffi_cv_ro_eh_frame" = xyes; then
279 AC_DEFINE(HAVE_RO_EH_FRAME, 1,
280 [Define if .eh_frame sections should be read-only.])
281 AC_DEFINE(EH_FRAME_FLAGS, "a",
282 [Define to the flags needed for the .section .eh_frame directive. ])
284 AC_DEFINE(EH_FRAME_FLAGS, "aw",
285 [Define to the flags needed for the .section .eh_frame directive. ])
288 AC_CACHE_CHECK([for __attribute__((visibility("hidden")))],
289 libffi_cv_hidden_visibility_attribute, [
290 echo 'int __attribute__ ((visibility ("hidden"))) foo (void) { return 1 ; }' > conftest.c
291 libffi_cv_hidden_visibility_attribute=no
292 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
293 if grep '\.hidden.*foo' conftest.s >/dev/null; then
294 libffi_cv_hidden_visibility_attribute=yes
299 if test $libffi_cv_hidden_visibility_attribute = yes; then
300 AC_DEFINE(HAVE_HIDDEN_VISIBILITY_ATTRIBUTE, 1,
301 [Define if __attribute__((visibility("hidden"))) is supported.])
306 #ifdef HAVE_HIDDEN_VISIBILITY_ATTRIBUTE
308 #define FFI_HIDDEN(name) .hidden name
310 #define FFI_HIDDEN __attribute__ ((visibility ("hidden")))
314 #define FFI_HIDDEN(name)
326 for i in $SOURCES; do
327 TARGET_OBJ="${TARGET_OBJ} src/${TARGETDIR}/"`echo $i | sed 's/[cS]$/lo/'`
335 [ --enable-debug debugging mode],
336 if test "$enable_debug" = "yes"; then
337 AC_DEFINE(FFI_DEBUG, 1, [Define this if you want extra debugging.])
339 AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes")
341 AC_ARG_ENABLE(structs,
342 [ --disable-structs omit code for struct support],
343 if test "$enable_structs" = "no"; then
344 AC_DEFINE(FFI_NO_STRUCTS, 1, [Define this if you do not want support for aggregate types.])
346 AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes")
348 AC_ARG_ENABLE(raw-api,
349 [ --disable-raw-api make the raw api unavailable],
350 if test "$enable_raw_api" = "no"; then
351 AC_DEFINE(FFI_NO_RAW_API, 1, [Define this if you do not want support for the raw API.])
354 AC_ARG_ENABLE(purify-safety,
355 [ --enable-purify-safety purify-safe mode],
356 if test "$enable_purify_safety" = "yes"; then
357 AC_DEFINE(USING_PURIFY, 1, [Define this if you are using Purify and want to suppress spurious messages.])
360 if test -n "$with_cross_host" &&
361 test x"$with_cross_host" != x"no"; then
362 toolexecdir='$(exec_prefix)/$(target_alias)'
363 toolexeclibdir='$(toolexecdir)/lib'
365 toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
366 toolexeclibdir='$(libdir)'
368 multi_os_directory=`$CC -print-multi-os-directory`
369 case $multi_os_directory in
370 .) ;; # Avoid trailing /.
371 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
373 AC_SUBST(toolexecdir)
374 AC_SUBST(toolexeclibdir)
376 if test "${multilib}" = "yes"; then
377 multilib_arg="--enable-multilib"
382 AC_CONFIG_COMMANDS(include, [test -d include || mkdir include])
383 AC_CONFIG_COMMANDS(src, [
384 test -d src || mkdir src
385 test -d src/$TARGETDIR || mkdir src/$TARGETDIR
386 ], [TARGETDIR="$TARGETDIR"])
388 AC_CONFIG_LINKS(include/ffitarget.h:src/$TARGETDIR/ffitarget.h)
390 AC_CONFIG_FILES(include/Makefile include/ffi.h Makefile testsuite/Makefile man/Makefile libffi.pc)