1 dnl Process this with autoconf to create configure
5 AC_INIT([libffi], [3.3], [http://github.com/libffi/libffi/issues])
6 AC_CONFIG_HEADERS([fficonfig.h])
9 target_alias=${target_alias-$host_alias}
13 LDFLAGS=`echo $LDFLAGS | sed "s/\-B[^ ]*libgloss\/frv\///"`\ -B`pwd`/../libgloss/frv/
21 # The same as in boehm-gc and libstdc++. Have to borrow it from there.
22 # We must force CC to /not/ be precious variables; otherwise
23 # the wrong, non-multilib-adjusted value will be used in multilibs.
24 # As a side effect, we have to subst CFLAGS ourselves.
25 # Also save and restore CFLAGS, since AC_PROG_CC will come up with
26 # defaults of its own if none are provided.
28 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
29 m4_define([_AC_ARG_VAR_PRECIOUS],[])
34 m4_undefine([_AC_ARG_VAR_PRECIOUS])
35 m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
42 AC_CONFIG_MACRO_DIR([m4])
44 # Test for 64-bit build.
45 AC_CHECK_SIZEOF([size_t])
49 # The AX_CFLAGS_WARN_ALL macro doesn't currently work for sunpro
51 if test "$ax_cv_c_compiler_vendor" != "sun"; then
55 if test "x$GCC" = "xyes"; then
56 CFLAGS="$CFLAGS -fexceptions"
60 set CC_FOR_TARGET "$CC"
61 set CXX_FOR_TARGET "$CXX"
66 AC_CHECK_HEADERS(sys/memfd.h)
67 AC_CHECK_FUNCS([memfd_create])
69 AC_CHECK_HEADERS(sys/mman.h)
70 AC_CHECK_FUNCS([mmap mkostemp mkstemp])
71 AC_FUNC_MMAP_BLACKLIST
73 dnl The -no-testsuite modules omit the test subdir.
74 AM_CONDITIONAL(TESTSUBDIR, test -d $srcdir/testsuite)
77 HAVE_LONG_DOUBLE_VARIANT=0
79 . ${srcdir}/configure.host
81 if test -n "${UNSUPPORTED}"; then
82 AC_MSG_ERROR(["libffi has not been ported to $host."])
85 AC_SUBST(AM_RUNTESTFLAGS)
86 AC_SUBST(AM_LTLDFLAGS)
89 AC_CHECK_FUNCS(memcpy)
92 AC_CHECK_SIZEOF(double)
93 AC_CHECK_SIZEOF(long double)
95 # Also AC_SUBST this variable for ffi.h.
96 if test -z "$HAVE_LONG_DOUBLE"; then
98 if test $ac_cv_sizeof_long_double != 0; then
99 if test $HAVE_LONG_DOUBLE_VARIANT != 0; then
100 AC_DEFINE(HAVE_LONG_DOUBLE_VARIANT, 1, [Define if you support more than one size of the long double type])
103 if test $ac_cv_sizeof_double != $ac_cv_sizeof_long_double; then
105 AC_DEFINE(HAVE_LONG_DOUBLE, 1, [Define if you have the long double type and it is bigger than a double])
110 AC_SUBST(HAVE_LONG_DOUBLE)
111 AC_SUBST(HAVE_LONG_DOUBLE_VARIANT)
119 AC_CACHE_CHECK([assembler and linker support unaligned pc related relocs],
120 libffi_cv_as_sparc_ua_pcrel, [
121 save_CFLAGS="$CFLAGS"
122 save_LDFLAGS="$LDFLAGS"
123 CFLAGS="$CFLAGS -fpic"
124 LDFLAGS="$LDFLAGS -shared"
125 AC_TRY_LINK([asm (".text; foo: nop; .data; .align 4; .byte 0; .uaword %r_disp32(foo); .text");],,
126 [libffi_cv_as_sparc_ua_pcrel=yes],
127 [libffi_cv_as_sparc_ua_pcrel=no])
128 CFLAGS="$save_CFLAGS"
129 LDFLAGS="$save_LDFLAGS"])
130 if test "x$libffi_cv_as_sparc_ua_pcrel" = xyes; then
131 AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
132 [Define if your assembler and linker support unaligned PC relative relocs.])
135 AC_CACHE_CHECK([assembler .register pseudo-op support],
136 libffi_cv_as_register_pseudo_op, [
137 libffi_cv_as_register_pseudo_op=unknown
138 # Check if we have .register
139 AC_TRY_COMPILE(,[asm (".register %g2, #scratch");],
140 [libffi_cv_as_register_pseudo_op=yes],
141 [libffi_cv_as_register_pseudo_op=no])
143 if test "x$libffi_cv_as_register_pseudo_op" = xyes; then
144 AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
145 [Define if your assembler supports .register.])
150 AC_CACHE_CHECK([assembler supports pc related relocs],
151 libffi_cv_as_x86_pcrel, [
152 libffi_cv_as_x86_pcrel=no
153 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
154 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
155 libffi_cv_as_x86_pcrel=yes
158 if test "x$libffi_cv_as_x86_pcrel" = xyes; then
159 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
160 [Define if your assembler supports PC relative relocs.])
165 AC_CACHE_CHECK([compiler uses zarch features],
166 libffi_cv_as_s390_zarch, [
167 libffi_cv_as_s390_zarch=no
168 echo 'void foo(void) { bar(); bar(); }' > conftest.c
169 if $CC $CFLAGS -S conftest.c > /dev/null 2>&1; then
170 if grep -q brasl conftest.s; then
171 libffi_cv_as_s390_zarch=yes
175 if test "x$libffi_cv_as_s390_zarch" = xyes; then
176 AC_DEFINE(HAVE_AS_S390_ZARCH, 1,
177 [Define if the compiler uses zarch features.])
182 AC_CACHE_CHECK([whether compiler supports pointer authentication],
183 libffi_cv_as_ptrauth, [
184 libffi_cv_as_ptrauth=unknown
187 # if __has_feature(ptrauth_calls)
188 # define HAVE_PTRAUTH 1
193 # error Pointer authentication not supported
196 [libffi_cv_as_ptrauth=yes],
197 [libffi_cv_as_ptrauth=no])
199 if test "x$libffi_cv_as_ptrauth" = xyes; then
200 AC_DEFINE(HAVE_PTRAUTH, 1,
201 [Define if your compiler supports pointer authentication.])
204 # On PaX enable kernels that have MPROTECT enable we can't use PROT_EXEC.
205 AC_ARG_ENABLE(pax_emutramp,
206 [ --enable-pax_emutramp enable pax emulated trampolines, for we can't use PROT_EXEC],
207 if test "$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])
213 if test "x$sys_symbol_underscore" = xyes; then
214 AC_DEFINE(SYMBOL_UNDERSCORE, 1, [Define if symbols are underscored.])
217 FFI_EXEC_TRAMPOLINE_TABLE=0
219 *arm*-apple-* | aarch64-apple-*)
220 FFI_EXEC_TRAMPOLINE_TABLE=1
221 AC_DEFINE(FFI_EXEC_TRAMPOLINE_TABLE, 1,
222 [Cannot use PROT_EXEC on this target, so, we revert to
225 *-apple-* | *-*-freebsd* | *-*-kfreebsd* | *-*-openbsd* | *-pc-solaris* | *-linux-android*)
226 AC_DEFINE(FFI_MMAP_EXEC_WRIT, 1,
227 [Cannot use malloc on this target, so, we revert to
231 AM_CONDITIONAL(FFI_EXEC_TRAMPOLINE_TABLE, test x$FFI_EXEC_TRAMPOLINE_TABLE = x1)
232 AC_SUBST(FFI_EXEC_TRAMPOLINE_TABLE)
234 if test x$TARGET = xX86_64; then
235 AC_CACHE_CHECK([toolchain supports unwind section type],
236 libffi_cv_as_x86_64_unwind_section_type, [
237 cat > conftest1.s << EOF
242 .section .eh_frame,"a",@unwind
246 cat > conftest2.c << EOF
251 libffi_cv_as_x86_64_unwind_section_type=no
252 # we ensure that we can compile _and_ link an assembly file containing an @unwind section
253 # since the compiler can support it and not the linker (ie old binutils)
254 if $CC -Wa,--fatal-warnings $CFLAGS -c conftest1.s > /dev/null 2>&1 && \
255 $CC conftest2.c conftest1.o > /dev/null 2>&1 ; then
256 libffi_cv_as_x86_64_unwind_section_type=yes
259 if test "x$libffi_cv_as_x86_64_unwind_section_type" = xyes; then
260 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
261 [Define if your assembler supports unwind section type.])
265 if test "x$GCC" = "xyes"; then
266 AX_CHECK_COMPILE_FLAG(-fno-lto, libffi_cv_no_lto=-fno-lto)
268 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
269 libffi_cv_ro_eh_frame, [
270 libffi_cv_ro_eh_frame=yes
271 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
272 if $CC $CFLAGS -c -fpic -fexceptions $libffi_cv_no_lto -o conftest.o conftest.c > /dev/null 2>&1; then
273 if readelf -WS conftest.o | grep -q -n 'eh_frame .* WA'; then
274 libffi_cv_ro_eh_frame=no
279 if test "x$libffi_cv_ro_eh_frame" = xyes; then
280 AC_DEFINE(HAVE_RO_EH_FRAME, 1,
281 [Define if .eh_frame sections should be read-only.])
282 AC_DEFINE(EH_FRAME_FLAGS, "a",
283 [Define to the flags needed for the .section .eh_frame directive. ])
285 AC_DEFINE(EH_FRAME_FLAGS, "aw",
286 [Define to the flags needed for the .section .eh_frame directive. ])
289 AC_CACHE_CHECK([for __attribute__((visibility("hidden")))],
290 libffi_cv_hidden_visibility_attribute, [
291 echo 'int __attribute__ ((visibility ("hidden"))) foo (void) { return 1 ; }' > conftest.c
292 libffi_cv_hidden_visibility_attribute=no
293 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
294 if egrep '(\.hidden|\.private_extern).*foo' conftest.s >/dev/null; then
295 libffi_cv_hidden_visibility_attribute=yes
300 if test $libffi_cv_hidden_visibility_attribute = yes; then
301 AC_DEFINE(HAVE_HIDDEN_VISIBILITY_ATTRIBUTE, 1,
302 [Define if __attribute__((visibility("hidden"))) is supported.])
307 AC_HELP_STRING([--disable-docs],
308 [Disable building of docs (default: no)]),
311 AM_CONDITIONAL(BUILD_DOCS, [test x$enable_docs = xyes])
314 #ifdef HAVE_HIDDEN_VISIBILITY_ATTRIBUTE
317 #define FFI_HIDDEN(name) .private_extern name
319 #define FFI_HIDDEN(name) .hidden name
322 #define FFI_HIDDEN __attribute__ ((visibility ("hidden")))
326 #define FFI_HIDDEN(name)
338 for i in $SOURCES; do
339 TARGET_OBJ="${TARGET_OBJ} src/${TARGETDIR}/"`echo $i | sed 's/[cS]$/lo/'`
347 [ --enable-debug debugging mode],
348 if test "$enable_debug" = "yes"; then
349 AC_DEFINE(FFI_DEBUG, 1, [Define this if you want extra debugging.])
351 AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes")
353 AC_ARG_ENABLE(structs,
354 [ --disable-structs omit code for struct support],
355 if test "$enable_structs" = "no"; then
356 AC_DEFINE(FFI_NO_STRUCTS, 1, [Define this if you do not want support for aggregate types.])
358 AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes")
360 AC_ARG_ENABLE(raw-api,
361 [ --disable-raw-api make the raw api unavailable],
362 if test "$enable_raw_api" = "no"; then
363 AC_DEFINE(FFI_NO_RAW_API, 1, [Define this if you do not want support for the raw API.])
369 *arm*-*-linux-* | aarch64*-*-linux-* | i*86-*-linux-* | x86_64-*-linux-*)
370 AC_DEFINE(FFI_EXEC_STATIC_TRAMP, 1,
371 [Define this if you want statically defined trampolines])
375 AC_ARG_ENABLE(purify-safety,
376 [ --enable-purify-safety purify-safe mode],
377 if test "$enable_purify_safety" = "yes"; then
378 AC_DEFINE(USING_PURIFY, 1, [Define this if you are using Purify and want to suppress spurious messages.])
381 AC_ARG_ENABLE(multi-os-directory,
382 [ --disable-multi-os-directory
383 disable use of gcc --print-multi-os-directory to change the library installation directory])
385 # These variables are only ever used when we cross-build to X86_WIN32.
386 # And we only support this with GCC, so...
387 if test "x$GCC" = "xyes"; then
388 if test -n "$with_cross_host" &&
389 test x"$with_cross_host" != x"no"; then
390 toolexecdir='${exec_prefix}'/'$(target_alias)'
391 toolexeclibdir='${toolexecdir}'/lib
393 toolexecdir='${libdir}'/gcc-lib/'$(target_alias)'
394 toolexeclibdir='${libdir}'
396 if test x"$enable_multi_os_directory" != x"no"; then
397 multi_os_directory=`$CC $CFLAGS -print-multi-os-directory`
398 case $multi_os_directory in
399 .) ;; # Avoid trailing /.
400 ../*) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
403 AC_SUBST(toolexecdir)
405 toolexeclibdir='${libdir}'
407 AC_SUBST(toolexeclibdir)
409 # Check linker support.
410 LIBFFI_ENABLE_SYMVERS
412 AC_CONFIG_COMMANDS(include, [test -d include || mkdir include])
413 AC_CONFIG_COMMANDS(src, [
414 test -d src || mkdir src
415 test -d src/$TARGETDIR || mkdir src/$TARGETDIR
416 ], [TARGETDIR="$TARGETDIR"])
418 AC_CONFIG_FILES(include/Makefile include/ffi.h Makefile testsuite/Makefile man/Makefile doc/Makefile libffi.pc)
422 # Copy this file instead of using AC_CONFIG_LINK in order to support
423 # compiling with MSVC, which won't understand cygwin style symlinks.
424 cp ${srcdir}/src/$TARGETDIR/ffitarget.h include/ffitarget.h