1 dnl Process this with autoconf to create configure
5 AC_INIT([libffi], [3.4.2], [http://github.com/libffi/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 # We would like our source tree to be readonly. However when releases or
16 # pre-releases are generated, the flex/bison generated files as well as the
17 # various formats of manuals need to be included along with the rest of the
18 # sources. Therefore we have --enable-generated-files-in-srcdir to do
20 AC_MSG_CHECKING(generated-files-in-srcdir)
21 AC_ARG_ENABLE(generated-files-in-srcdir,
22 AS_HELP_STRING([--enable-generated-files-in-srcdir],
23 [put copies of generated files in source dir intended for creating source tarballs for users without texinfo bison or flex]),
25 yes) enable_generated_files_in_srcdir=yes ;;
26 no) enable_generated_files_in_srcdir=no ;;
27 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
29 [enable_generated_files_in_srcdir=no])
30 AC_MSG_RESULT($enable_generated_files_in_srcdir)
31 AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes)
33 # The same as in boehm-gc and libstdc++. Have to borrow it from there.
34 # We must force CC to /not/ be precious variables; otherwise
35 # the wrong, non-multilib-adjusted value will be used in multilibs.
36 # As a side effect, we have to subst CFLAGS ourselves.
37 # Also save and restore CFLAGS, since AC_PROG_CC will come up with
38 # defaults of its own if none are provided.
40 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
41 m4_define([_AC_ARG_VAR_PRECIOUS],[])
46 m4_undefine([_AC_ARG_VAR_PRECIOUS])
47 m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
55 AC_CHECK_TOOL(READELF, readelf)
57 # Test for 64-bit build.
58 AC_CHECK_SIZEOF([size_t])
61 set CC_FOR_TARGET "$CC"
62 set CXX_FOR_TARGET "$CXX"
63 set compiler_vendor "$ax_cv_c_compiler_vendor"
68 AC_CHECK_HEADERS(sys/memfd.h)
69 AC_CHECK_FUNCS([memfd_create])
71 AC_CHECK_HEADERS(sys/mman.h)
72 AC_CHECK_FUNCS([mmap mkostemp mkstemp])
73 AC_FUNC_MMAP_BLACKLIST
75 dnl The -no-testsuite modules omit the test subdir.
76 AM_CONDITIONAL(TESTSUBDIR, test -d $srcdir/testsuite)
79 HAVE_LONG_DOUBLE_VARIANT=0
81 . ${srcdir}/configure.host
83 if test -n "${UNSUPPORTED}"; then
84 AC_MSG_ERROR(["libffi has not been ported to $host."])
87 AC_SUBST(AM_RUNTESTFLAGS)
88 AC_SUBST(AM_LTLDFLAGS)
91 AC_CHECK_FUNCS(memcpy)
94 AC_CHECK_SIZEOF(double)
95 AC_CHECK_SIZEOF(long double)
97 # Also AC_SUBST this variable for ffi.h.
98 if test -z "$HAVE_LONG_DOUBLE"; then
100 if test $ac_cv_sizeof_long_double != 0; then
101 if test $HAVE_LONG_DOUBLE_VARIANT != 0; then
102 AC_DEFINE(HAVE_LONG_DOUBLE_VARIANT, 1, [Define if you support more than one size of the long double type])
105 if test $ac_cv_sizeof_double != $ac_cv_sizeof_long_double; then
107 AC_DEFINE(HAVE_LONG_DOUBLE, 1, [Define if you have the long double type and it is bigger than a double])
112 AC_SUBST(HAVE_LONG_DOUBLE)
113 AC_SUBST(HAVE_LONG_DOUBLE_VARIANT)
121 AC_CACHE_CHECK([assembler and linker support unaligned pc related relocs],
122 libffi_cv_as_sparc_ua_pcrel, [
123 save_CFLAGS="$CFLAGS"
124 save_LDFLAGS="$LDFLAGS"
125 CFLAGS="$CFLAGS -fpic"
126 LDFLAGS="$LDFLAGS -shared"
127 AC_TRY_LINK([asm (".text; foo: nop; .data; .align 4; .byte 0; .uaword %r_disp32(foo); .text");],,
128 [libffi_cv_as_sparc_ua_pcrel=yes],
129 [libffi_cv_as_sparc_ua_pcrel=no])
130 CFLAGS="$save_CFLAGS"
131 LDFLAGS="$save_LDFLAGS"])
132 if test "x$libffi_cv_as_sparc_ua_pcrel" = xyes; then
133 AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
134 [Define if your assembler and linker support unaligned PC relative relocs.])
137 AC_CACHE_CHECK([assembler .register pseudo-op support],
138 libffi_cv_as_register_pseudo_op, [
139 libffi_cv_as_register_pseudo_op=unknown
140 # Check if we have .register
141 AC_TRY_COMPILE(,[asm (".register %g2, #scratch");],
142 [libffi_cv_as_register_pseudo_op=yes],
143 [libffi_cv_as_register_pseudo_op=no])
145 if test "x$libffi_cv_as_register_pseudo_op" = xyes; then
146 AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
147 [Define if your assembler supports .register.])
152 AC_CACHE_CHECK([assembler supports pc related relocs],
153 libffi_cv_as_x86_pcrel, [
154 libffi_cv_as_x86_pcrel=no
155 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
156 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
157 libffi_cv_as_x86_pcrel=yes
160 if test "x$libffi_cv_as_x86_pcrel" = xyes; then
161 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
162 [Define if your assembler supports PC relative relocs.])
167 AC_CACHE_CHECK([compiler uses zarch features],
168 libffi_cv_as_s390_zarch, [
169 libffi_cv_as_s390_zarch=no
170 echo 'void foo(void) { bar(); bar(); }' > conftest.c
171 if $CC $CFLAGS -S conftest.c > /dev/null 2>&1; then
172 if grep -q brasl conftest.s; then
173 libffi_cv_as_s390_zarch=yes
177 if test "x$libffi_cv_as_s390_zarch" = xyes; then
178 AC_DEFINE(HAVE_AS_S390_ZARCH, 1,
179 [Define if the compiler uses zarch features.])
184 AC_CACHE_CHECK([whether compiler supports pointer authentication],
185 libffi_cv_as_ptrauth, [
186 libffi_cv_as_ptrauth=unknown
189 # if __has_feature(ptrauth_calls)
190 # define HAVE_PTRAUTH 1
195 # error Pointer authentication not supported
198 [libffi_cv_as_ptrauth=yes],
199 [libffi_cv_as_ptrauth=no])
201 if test "x$libffi_cv_as_ptrauth" = xyes; then
202 AC_DEFINE(HAVE_PTRAUTH, 1,
203 [Define if your compiler supports pointer authentication.])
206 # On PaX enable kernels that have MPROTECT enable we can't use PROT_EXEC.
207 AC_ARG_ENABLE(pax_emutramp,
208 [ --enable-pax_emutramp enable pax emulated trampolines, for we can't use PROT_EXEC],
209 if test "$enable_pax_emutramp" = "yes"; then
210 AC_DEFINE(FFI_MMAP_EXEC_EMUTRAMP_PAX, 1,
211 [Define this if you want to enable pax emulated trampolines])
214 FFI_EXEC_TRAMPOLINE_TABLE=0
216 *arm*-apple-* | aarch64-apple-*)
217 FFI_EXEC_TRAMPOLINE_TABLE=1
218 AC_DEFINE(FFI_EXEC_TRAMPOLINE_TABLE, 1,
219 [Cannot use PROT_EXEC on this target, so, we revert to
222 *-apple-* | *-*-freebsd* | *-*-kfreebsd* | *-*-openbsd* | *-pc-solaris* | *-linux-android*)
223 AC_DEFINE(FFI_MMAP_EXEC_WRIT, 1,
224 [Cannot use malloc on this target, so, we revert to
228 AM_CONDITIONAL(FFI_EXEC_TRAMPOLINE_TABLE, test x$FFI_EXEC_TRAMPOLINE_TABLE = x1)
229 AC_SUBST(FFI_EXEC_TRAMPOLINE_TABLE)
231 if test x$TARGET = xX86_64; then
232 AC_CACHE_CHECK([toolchain supports unwind section type],
233 libffi_cv_as_x86_64_unwind_section_type, [
234 cat > conftest1.s << EOF
239 .section .eh_frame,"a",@unwind
243 cat > conftest2.c << EOF
248 libffi_cv_as_x86_64_unwind_section_type=no
249 # we ensure that we can compile _and_ link an assembly file containing an @unwind section
250 # since the compiler can support it and not the linker (ie old binutils)
251 if $CC -Wa,--fatal-warnings $CFLAGS -c conftest1.s > /dev/null 2>&1 && \
252 $CC conftest2.c conftest1.o > /dev/null 2>&1 ; then
253 libffi_cv_as_x86_64_unwind_section_type=yes
256 if test "x$libffi_cv_as_x86_64_unwind_section_type" = xyes; then
257 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
258 [Define if your assembler supports unwind section type.])
262 if test "x$GCC" = "xyes"; then
263 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
264 libffi_cv_ro_eh_frame, [
265 libffi_cv_ro_eh_frame=yes
266 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
267 if $CC $CFLAGS -c -fpic -fexceptions -fno-lto -o conftest.o conftest.c > /dev/null 2>&1; then
268 if $READELF -WS conftest.o | grep -q -n 'eh_frame .* WA'; then
269 libffi_cv_ro_eh_frame=no
274 if test "x$libffi_cv_ro_eh_frame" = xyes; then
275 AC_DEFINE(HAVE_RO_EH_FRAME, 1,
276 [Define if .eh_frame sections should be read-only.])
277 AC_DEFINE(EH_FRAME_FLAGS, "a",
278 [Define to the flags needed for the .section .eh_frame directive. ])
280 AC_DEFINE(EH_FRAME_FLAGS, "aw",
281 [Define to the flags needed for the .section .eh_frame directive. ])
284 AC_CACHE_CHECK([for __attribute__((visibility("hidden")))],
285 libffi_cv_hidden_visibility_attribute, [
286 echo 'int __attribute__ ((visibility ("hidden"))) foo (void) { return 1 ; }' > conftest.c
287 libffi_cv_hidden_visibility_attribute=no
288 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
289 if egrep '(\.hidden|\.private_extern).*foo' conftest.s >/dev/null; then
290 libffi_cv_hidden_visibility_attribute=yes
295 if test $libffi_cv_hidden_visibility_attribute = yes; then
296 AC_DEFINE(HAVE_HIDDEN_VISIBILITY_ATTRIBUTE, 1,
297 [Define if __attribute__((visibility("hidden"))) is supported.])
301 # See if makeinfo has been installed and is modern enough
302 # that we can use it.
303 ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version],
304 [GNU texinfo.* \([0-9][0-9.]*\)],
305 [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
306 AM_CONDITIONAL(BUILD_DOCS, test $gcc_cv_prog_makeinfo_modern = "yes")
309 #ifdef HAVE_HIDDEN_VISIBILITY_ATTRIBUTE
312 #define FFI_HIDDEN(name) .private_extern name
314 #define FFI_HIDDEN(name) .hidden name
317 #define FFI_HIDDEN __attribute__ ((visibility ("hidden")))
321 #define FFI_HIDDEN(name)
333 for i in $SOURCES; do
334 TARGET_OBJ="${TARGET_OBJ} src/${TARGETDIR}/"`echo $i | sed 's/[cS]$/lo/'`
342 [ --enable-debug debugging mode],
343 if test "$enable_debug" = "yes"; then
344 AC_DEFINE(FFI_DEBUG, 1, [Define this if you want extra debugging.])
346 AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes")
348 AC_ARG_ENABLE(structs,
349 [ --disable-structs omit code for struct support],
350 if test "$enable_structs" = "no"; then
351 AC_DEFINE(FFI_NO_STRUCTS, 1, [Define this if you do not want support for aggregate types.])
353 AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes")
355 AC_ARG_ENABLE(raw-api,
356 [ --disable-raw-api make the raw api unavailable],
357 if test "$enable_raw_api" = "no"; then
358 AC_DEFINE(FFI_NO_RAW_API, 1, [Define this if you do not want support for the raw API.])
361 AC_ARG_ENABLE(exec-static-tramp,
362 [ --enable-exec-static-tramp enable use of static exec trampolines])
364 if test "$enable_exec_static_tramp" = yes; then
368 *arm*-*-linux-* | aarch64*-*-linux-* | i*86-*-linux-* | x86_64-*-linux-*)
369 AC_DEFINE(FFI_EXEC_STATIC_TRAMP, 1,
370 [Define this if you want statically defined trampolines])
375 AC_ARG_ENABLE(purify-safety,
376 [ --enable-purify-safety purify-safe mode],
377 if test "$enable_purify_safety" = "yes"; then
378 AC_DEFINE(USING_PURIFY, 1, [Define this if you are using Purify and want to suppress spurious messages.])
381 GCC_WITH_TOOLEXECLIBDIR
383 if test -n "$with_cross_host" &&
384 test x"$with_cross_host" != x"no"; then
385 toolexecdir='$(exec_prefix)/$(target_alias)'
386 case ${with_toolexeclibdir} in
388 toolexeclibdir='$(toolexecdir)/lib'
391 toolexeclibdir=${with_toolexeclibdir}
395 toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
396 toolexeclibdir='$(libdir)'
398 multi_os_directory=`$CC -print-multi-os-directory`
399 case $multi_os_directory in
400 .) ;; # Avoid trailing /.
401 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
403 AC_SUBST(toolexecdir)
404 AC_SUBST(toolexeclibdir)
406 if test "${multilib}" = "yes"; then
407 multilib_arg="--enable-multilib"
412 # Check linker support.
413 LIBFFI_ENABLE_SYMVERS
415 # Determine what GCC version number to use in filesystem paths.
418 AC_CONFIG_COMMANDS(include, [test -d include || mkdir include])
419 AC_CONFIG_COMMANDS(src, [
420 test -d src || mkdir src
421 test -d src/$TARGETDIR || mkdir src/$TARGETDIR
422 ], [TARGETDIR="$TARGETDIR"])
424 AC_CONFIG_FILES(include/Makefile include/ffi.h Makefile testsuite/Makefile man/Makefile libffi.pc)
426 AC_CONFIG_LINKS(include/ffitarget.h:src/$TARGETDIR/ffitarget.h)