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])
51 # Add CET specific flags if CET is enabled
52 GCC_CET_FLAGS(CET_FLAGS)
58 AM_CONDITIONAL([ENABLE_DARWIN_AT_RPATH], [test x$enable_darwin_at_rpath = xyes])
60 AC_CHECK_TOOL(READELF, readelf)
62 # Test for 64-bit build.
63 AC_CHECK_SIZEOF([size_t])
65 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
68 set SYSROOT_CFLAGS_FOR_TARGET "$SYSROOT_CFLAGS_FOR_TARGET"
69 set compiler_vendor "$ax_cv_c_compiler_vendor"
74 AC_CHECK_HEADERS(sys/memfd.h)
75 AC_CHECK_FUNCS([memfd_create])
77 AC_CHECK_HEADERS(sys/mman.h)
78 AC_CHECK_FUNCS([mmap mkostemp mkstemp])
79 AC_FUNC_MMAP_BLACKLIST
81 dnl The -no-testsuite modules omit the test subdir.
82 AM_CONDITIONAL(TESTSUBDIR, test -d $srcdir/testsuite)
85 HAVE_LONG_DOUBLE_VARIANT=0
87 . ${srcdir}/configure.host
89 if test -n "${UNSUPPORTED}"; then
90 AC_MSG_ERROR(["libffi has not been ported to $host."])
93 AC_SUBST(AM_RUNTESTFLAGS)
94 AC_SUBST(AM_LTLDFLAGS)
97 AC_CHECK_FUNCS(memcpy)
100 AC_CHECK_SIZEOF(double)
101 AC_CHECK_SIZEOF(long double)
103 # Also AC_SUBST this variable for ffi.h.
104 if test -z "$HAVE_LONG_DOUBLE"; then
106 if test $ac_cv_sizeof_long_double != 0; then
107 if test $HAVE_LONG_DOUBLE_VARIANT != 0; then
108 AC_DEFINE(HAVE_LONG_DOUBLE_VARIANT, 1, [Define if you support more than one size of the long double type])
111 if test $ac_cv_sizeof_double != $ac_cv_sizeof_long_double; then
113 AC_DEFINE(HAVE_LONG_DOUBLE, 1, [Define if you have the long double type and it is bigger than a double])
118 AC_SUBST(HAVE_LONG_DOUBLE)
119 AC_SUBST(HAVE_LONG_DOUBLE_VARIANT)
127 AC_CACHE_CHECK([assembler and linker support unaligned pc related relocs],
128 libffi_cv_as_sparc_ua_pcrel, [
129 save_CFLAGS="$CFLAGS"
130 save_LDFLAGS="$LDFLAGS"
131 CFLAGS="$CFLAGS -fpic"
132 LDFLAGS="$LDFLAGS -shared"
133 AC_TRY_LINK([asm (".text; foo: nop; .data; .align 4; .byte 0; .uaword %r_disp32(foo); .text");],,
134 [libffi_cv_as_sparc_ua_pcrel=yes],
135 [libffi_cv_as_sparc_ua_pcrel=no])
136 CFLAGS="$save_CFLAGS"
137 LDFLAGS="$save_LDFLAGS"])
138 if test "x$libffi_cv_as_sparc_ua_pcrel" = xyes; then
139 AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
140 [Define if your assembler and linker support unaligned PC relative relocs.])
143 AC_CACHE_CHECK([assembler .register pseudo-op support],
144 libffi_cv_as_register_pseudo_op, [
145 libffi_cv_as_register_pseudo_op=unknown
146 # Check if we have .register
147 AC_TRY_COMPILE(,[asm (".register %g2, #scratch");],
148 [libffi_cv_as_register_pseudo_op=yes],
149 [libffi_cv_as_register_pseudo_op=no])
151 if test "x$libffi_cv_as_register_pseudo_op" = xyes; then
152 AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
153 [Define if your assembler supports .register.])
158 AC_CACHE_CHECK([assembler supports pc related relocs],
159 libffi_cv_as_x86_pcrel, [
160 libffi_cv_as_x86_pcrel=no
161 echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
162 if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
163 libffi_cv_as_x86_pcrel=yes
166 if test "x$libffi_cv_as_x86_pcrel" = xyes; then
167 AC_DEFINE(HAVE_AS_X86_PCREL, 1,
168 [Define if your assembler supports PC relative relocs.])
173 AC_CACHE_CHECK([compiler uses zarch features],
174 libffi_cv_as_s390_zarch, [
175 libffi_cv_as_s390_zarch=no
176 echo 'void foo(void) { bar(); bar(); }' > conftest.c
177 if $CC $CFLAGS -S conftest.c > /dev/null 2>&1; then
178 if grep -q brasl conftest.s; then
179 libffi_cv_as_s390_zarch=yes
183 if test "x$libffi_cv_as_s390_zarch" = xyes; then
184 AC_DEFINE(HAVE_AS_S390_ZARCH, 1,
185 [Define if the compiler uses zarch features.])
190 AC_CACHE_CHECK([whether compiler supports pointer authentication],
191 libffi_cv_as_ptrauth, [
192 libffi_cv_as_ptrauth=unknown
195 # if __has_feature(ptrauth_calls)
196 # define HAVE_PTRAUTH 1
201 # error Pointer authentication not supported
204 [libffi_cv_as_ptrauth=yes],
205 [libffi_cv_as_ptrauth=no])
207 if test "x$libffi_cv_as_ptrauth" = xyes; then
208 AC_DEFINE(HAVE_PTRAUTH, 1,
209 [Define if your compiler supports pointer authentication.])
212 # On PaX enable kernels that have MPROTECT enable we can't use PROT_EXEC.
213 AC_ARG_ENABLE(pax_emutramp,
214 [ --enable-pax_emutramp enable pax emulated trampolines, for we can't use PROT_EXEC],
215 if test "$enable_pax_emutramp" = "yes"; then
216 AC_DEFINE(FFI_MMAP_EXEC_EMUTRAMP_PAX, 1,
217 [Define this if you want to enable pax emulated trampolines])
220 FFI_EXEC_TRAMPOLINE_TABLE=0
222 *arm*-apple-* | aarch64-apple-*)
223 FFI_EXEC_TRAMPOLINE_TABLE=1
224 AC_DEFINE(FFI_EXEC_TRAMPOLINE_TABLE, 1,
225 [Cannot use PROT_EXEC on this target, so, we revert to
228 *-apple-* | *-*-freebsd* | *-*-kfreebsd* | *-*-openbsd* | *-pc-solaris* | *-linux-android*)
229 AC_DEFINE(FFI_MMAP_EXEC_WRIT, 1,
230 [Cannot use malloc on this target, so, we revert to
234 AM_CONDITIONAL(FFI_EXEC_TRAMPOLINE_TABLE, test x$FFI_EXEC_TRAMPOLINE_TABLE = x1)
235 AC_SUBST(FFI_EXEC_TRAMPOLINE_TABLE)
237 if test x$TARGET = xX86_64; then
238 AC_CACHE_CHECK([toolchain supports unwind section type],
239 libffi_cv_as_x86_64_unwind_section_type, [
240 cat > conftest1.s << EOF
245 .section .eh_frame,"a",@unwind
249 cat > conftest2.c << EOF
254 libffi_cv_as_x86_64_unwind_section_type=no
255 # we ensure that we can compile _and_ link an assembly file containing an @unwind section
256 # since the compiler can support it and not the linker (ie old binutils)
257 if $CC -Wa,--fatal-warnings $CFLAGS -c conftest1.s > /dev/null 2>&1 && \
258 $CC conftest2.c conftest1.o > /dev/null 2>&1 ; then
259 libffi_cv_as_x86_64_unwind_section_type=yes
262 if test "x$libffi_cv_as_x86_64_unwind_section_type" = xyes; then
263 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
264 [Define if your assembler supports unwind section type.])
268 if test "x$GCC" = "xyes"; then
269 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
270 libffi_cv_ro_eh_frame, [
271 libffi_cv_ro_eh_frame=yes
272 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
273 if $CC $CFLAGS -c -fpic -fexceptions -fno-lto -o conftest.o conftest.c > /dev/null 2>&1; then
274 if $READELF -WS conftest.o | grep -q -n 'eh_frame .* WA'; then
275 libffi_cv_ro_eh_frame=no
280 if test "x$libffi_cv_ro_eh_frame" = xyes; then
281 AC_DEFINE(HAVE_RO_EH_FRAME, 1,
282 [Define if .eh_frame sections should be read-only.])
283 AC_DEFINE(EH_FRAME_FLAGS, "a",
284 [Define to the flags needed for the .section .eh_frame directive. ])
286 AC_DEFINE(EH_FRAME_FLAGS, "aw",
287 [Define to the flags needed for the .section .eh_frame directive. ])
290 AC_CACHE_CHECK([for __attribute__((visibility("hidden")))],
291 libffi_cv_hidden_visibility_attribute, [
292 echo 'int __attribute__ ((visibility ("hidden"))) foo (void) { return 1 ; }' > conftest.c
293 libffi_cv_hidden_visibility_attribute=no
294 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
295 if egrep '(\.hidden|\.private_extern).*foo' conftest.s >/dev/null; then
296 libffi_cv_hidden_visibility_attribute=yes
301 if test $libffi_cv_hidden_visibility_attribute = yes; then
302 AC_DEFINE(HAVE_HIDDEN_VISIBILITY_ATTRIBUTE, 1,
303 [Define if __attribute__((visibility("hidden"))) is supported.])
307 # See if makeinfo has been installed and is modern enough
308 # that we can use it.
309 ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version],
310 [GNU texinfo.* \([0-9][0-9.]*\)],
311 [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
312 AM_CONDITIONAL(BUILD_DOCS, test $gcc_cv_prog_makeinfo_modern = "yes")
315 #ifdef HAVE_HIDDEN_VISIBILITY_ATTRIBUTE
318 #define FFI_HIDDEN(name) .private_extern name
320 #define FFI_HIDDEN(name) .hidden name
323 #define FFI_HIDDEN __attribute__ ((visibility ("hidden")))
327 #define FFI_HIDDEN(name)
339 for i in $SOURCES; do
340 TARGET_OBJ="${TARGET_OBJ} src/${TARGETDIR}/"`echo $i | sed 's/[cS]$/lo/'`
348 [ --enable-debug debugging mode],
349 if test "$enable_debug" = "yes"; then
350 AC_DEFINE(FFI_DEBUG, 1, [Define this if you want extra debugging.])
352 AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes")
354 AC_ARG_ENABLE(structs,
355 [ --disable-structs omit code for struct support],
356 if test "$enable_structs" = "no"; then
357 AC_DEFINE(FFI_NO_STRUCTS, 1, [Define this if you do not want support for aggregate types.])
359 AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes")
361 AC_ARG_ENABLE(raw-api,
362 [ --disable-raw-api make the raw api unavailable],
363 if test "$enable_raw_api" = "no"; then
364 AC_DEFINE(FFI_NO_RAW_API, 1, [Define this if you do not want support for the raw API.])
367 AC_ARG_ENABLE(exec-static-tramp,
368 [ --enable-exec-static-tramp enable use of static exec trampolines])
370 if test "$enable_exec_static_tramp" = yes; then
374 *arm*-*-linux-* | aarch64*-*-linux-* | i*86-*-linux-* | x86_64-*-linux-*)
375 AC_DEFINE(FFI_EXEC_STATIC_TRAMP, 1,
376 [Define this if you want statically defined trampolines])
381 AC_ARG_ENABLE(purify-safety,
382 [ --enable-purify-safety purify-safe mode],
383 if test "$enable_purify_safety" = "yes"; then
384 AC_DEFINE(USING_PURIFY, 1, [Define this if you are using Purify and want to suppress spurious messages.])
387 GCC_WITH_TOOLEXECLIBDIR
389 if test -n "$with_cross_host" &&
390 test x"$with_cross_host" != x"no"; then
391 toolexecdir='$(exec_prefix)/$(target_alias)'
392 case ${with_toolexeclibdir} in
394 toolexeclibdir='$(toolexecdir)/lib'
397 toolexeclibdir=${with_toolexeclibdir}
401 toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
402 toolexeclibdir='$(libdir)'
404 multi_os_directory=`$CC -print-multi-os-directory`
405 case $multi_os_directory in
406 .) ;; # Avoid trailing /.
407 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
409 AC_SUBST(toolexecdir)
410 AC_SUBST(toolexeclibdir)
412 if test "${multilib}" = "yes"; then
413 multilib_arg="--enable-multilib"
418 # Check linker support.
419 LIBFFI_ENABLE_SYMVERS
421 # Determine what GCC version number to use in filesystem paths.
424 AC_CONFIG_COMMANDS(include, [test -d include || mkdir include])
425 AC_CONFIG_COMMANDS(src, [
426 test -d src || mkdir src
427 test -d src/$TARGETDIR || mkdir src/$TARGETDIR
428 ], [TARGETDIR="$TARGETDIR"])
430 AC_CONFIG_FILES(include/Makefile include/ffi.h Makefile testsuite/Makefile man/Makefile libffi.pc)
432 AC_CONFIG_LINKS(include/ffitarget.h:src/$TARGETDIR/ffitarget.h)