1 dnl Process this with autoconf to create configure
4 AC_INIT([libffi], [3.99999], [http://github.com/atgreen/libffi/issues])
5 AC_CONFIG_HEADERS([fficonfig.h])
7 AM_ENABLE_MULTILIB(, ..)
10 target_alias=${target_alias-$host_alias}
12 AM_INIT_AUTOMAKE([no-dist])
14 # See if makeinfo has been installed and is modern enough
16 ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version],
17 [GNU texinfo.* \([0-9][0-9.]*\)],
18 [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
19 AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes")
21 # We would like our source tree to be readonly. However when releases or
22 # pre-releases are generated, the flex/bison generated files as well as the
23 # various formats of manuals need to be included along with the rest of the
24 # sources. Therefore we have --enable-generated-files-in-srcdir to do
26 AC_MSG_CHECKING(generated-files-in-srcdir)
27 AC_ARG_ENABLE(generated-files-in-srcdir,
28 AS_HELP_STRING([--enable-generated-files-in-srcdir],
29 [put copies of generated files in source dir intended for creating source tarballs for users without texinfo bison or flex]),
31 yes) enable_generated_files_in_srcdir=yes ;;
32 no) enable_generated_files_in_srcdir=no ;;
33 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
35 [enable_generated_files_in_srcdir=no])
36 AC_MSG_RESULT($enable_generated_files_in_srcdir)
37 AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes)
39 # The same as in boehm-gc and libstdc++. Have to borrow it from there.
40 # We must force CC to /not/ be precious variables; otherwise
41 # the wrong, non-multilib-adjusted value will be used in multilibs.
42 # As a side effect, we have to subst CFLAGS ourselves.
43 # Also save and restore CFLAGS, since AC_PROG_CC will come up with
44 # defaults of its own if none are provided.
46 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
47 m4_define([_AC_ARG_VAR_PRECIOUS],[])
52 m4_undefine([_AC_ARG_VAR_PRECIOUS])
53 m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
61 # Test for 64-bit build.
62 AC_CHECK_SIZEOF([size_t])
66 AC_CHECK_HEADERS(sys/mman.h)
67 AC_CHECK_FUNCS([mmap mkostemp])
68 AC_FUNC_MMAP_BLACKLIST
70 dnl The -no-testsuite modules omit the test subdir.
71 AM_CONDITIONAL(TESTSUBDIR, test -d $srcdir/testsuite)
74 HAVE_LONG_DOUBLE_VARIANT=0
76 . ${srcdir}/configure.host
78 if test -n "${UNSUPPORTED}"; then
79 AC_MSG_ERROR(["libffi has not been ported to $host."])
82 AC_SUBST(AM_RUNTESTFLAGS)
83 AC_SUBST(AM_LTLDFLAGS)
86 AC_CHECK_FUNCS(memcpy)
89 AC_CHECK_SIZEOF(double)
90 AC_CHECK_SIZEOF(long double)
92 # Also AC_SUBST this variable for ffi.h.
93 if test -z "$HAVE_LONG_DOUBLE"; then
95 if test $ac_cv_sizeof_long_double != 0; then
96 if test $HAVE_LONG_DOUBLE_VARIANT != 0; then
97 AC_DEFINE(HAVE_LONG_DOUBLE_VARIANT, 1, [Define if you support more than one size of the long double type])
100 if test $ac_cv_sizeof_double != $ac_cv_sizeof_long_double; then
102 AC_DEFINE(HAVE_LONG_DOUBLE, 1, [Define if you have the long double type and it is bigger than a double])
107 AC_SUBST(HAVE_LONG_DOUBLE)
108 AC_SUBST(HAVE_LONG_DOUBLE_VARIANT)
116 AC_CACHE_CHECK([assembler and linker support unaligned pc related relocs],
117 libffi_cv_as_sparc_ua_pcrel, [
118 save_CFLAGS="$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.])
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.])
162 AC_CACHE_CHECK([compiler uses zarch features],
163 libffi_cv_as_s390_zarch, [
164 libffi_cv_as_s390_zarch=no
165 echo 'void foo(void) { bar(); bar(); }' > conftest.c
166 if $CC $CFLAGS -S conftest.c > /dev/null 2>&1; then
167 if grep -q brasl conftest.s; then
168 libffi_cv_as_s390_zarch=yes
172 if test "x$libffi_cv_as_s390_zarch" = xyes; then
173 AC_DEFINE(HAVE_AS_S390_ZARCH, 1,
174 [Define if the compiler uses zarch features.])
179 # On PaX enable kernels that have MPROTECT enable we can't use PROT_EXEC.
180 AC_ARG_ENABLE(pax_emutramp,
181 [ --enable-pax_emutramp enable pax emulated trampolines, for we can't use PROT_EXEC],
182 if test "$enable_pax_emutramp" = "yes"; then
183 AC_DEFINE(FFI_MMAP_EXEC_EMUTRAMP_PAX, 1,
184 [Define this if you want to enable pax emulated trampolines])
187 FFI_EXEC_TRAMPOLINE_TABLE=0
189 *arm*-apple-darwin* | aarch64-apple-darwin*)
190 FFI_EXEC_TRAMPOLINE_TABLE=1
191 AC_DEFINE(FFI_EXEC_TRAMPOLINE_TABLE, 1,
192 [Cannot use PROT_EXEC on this target, so, we revert to
195 *-apple-darwin1* | *-*-freebsd* | *-*-kfreebsd* | *-*-openbsd* | *-pc-solaris*)
196 AC_DEFINE(FFI_MMAP_EXEC_WRIT, 1,
197 [Cannot use malloc on this target, so, we revert to
201 AM_CONDITIONAL(FFI_EXEC_TRAMPOLINE_TABLE, test x$FFI_EXEC_TRAMPOLINE_TABLE = x1)
202 AC_SUBST(FFI_EXEC_TRAMPOLINE_TABLE)
204 if test x$TARGET = xX86_64; then
205 AC_CACHE_CHECK([toolchain supports unwind section type],
206 libffi_cv_as_x86_64_unwind_section_type, [
207 cat > conftest1.s << EOF
212 .section .eh_frame,"a",@unwind
216 cat > conftest2.c << EOF
221 libffi_cv_as_x86_64_unwind_section_type=no
222 # we ensure that we can compile _and_ link an assembly file containing an @unwind section
223 # since the compiler can support it and not the linker (ie old binutils)
224 if $CC -Wa,--fatal-warnings $CFLAGS -c conftest1.s > /dev/null 2>&1 && \
225 $CC conftest2.c conftest1.o > /dev/null 2>&1 ; then
226 libffi_cv_as_x86_64_unwind_section_type=yes
229 if test "x$libffi_cv_as_x86_64_unwind_section_type" = xyes; then
230 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
231 [Define if your assembler supports unwind section type.])
235 if test "x$GCC" = "xyes"; then
236 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
237 libffi_cv_ro_eh_frame, [
238 libffi_cv_ro_eh_frame=no
239 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
240 if $CC $CFLAGS -c -fpic -fexceptions -o conftest.o conftest.c > /dev/null 2>&1; then
241 objdump -h conftest.o > conftest.dump 2>&1
242 libffi_eh_frame_line=`grep -n eh_frame conftest.dump | cut -d: -f 1`
243 if test "x$libffi_eh_frame_line" != "x"; then
244 libffi_test_line=`expr $libffi_eh_frame_line + 1`p
245 sed -n $libffi_test_line conftest.dump > conftest.line
246 if grep READONLY conftest.line > /dev/null; then
247 libffi_cv_ro_eh_frame=yes
253 if test "x$libffi_cv_ro_eh_frame" = xyes; then
254 AC_DEFINE(HAVE_RO_EH_FRAME, 1,
255 [Define if .eh_frame sections should be read-only.])
256 AC_DEFINE(EH_FRAME_FLAGS, "a",
257 [Define to the flags needed for the .section .eh_frame directive. ])
259 AC_DEFINE(EH_FRAME_FLAGS, "aw",
260 [Define to the flags needed for the .section .eh_frame directive. ])
263 AC_CACHE_CHECK([for __attribute__((visibility("hidden")))],
264 libffi_cv_hidden_visibility_attribute, [
265 echo 'int __attribute__ ((visibility ("hidden"))) foo (void) { return 1 ; }' > conftest.c
266 libffi_cv_hidden_visibility_attribute=no
267 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
268 if grep '\.hidden.*foo' conftest.s >/dev/null; then
269 libffi_cv_hidden_visibility_attribute=yes
274 if test $libffi_cv_hidden_visibility_attribute = yes; then
275 AC_DEFINE(HAVE_HIDDEN_VISIBILITY_ATTRIBUTE, 1,
276 [Define if __attribute__((visibility("hidden"))) is supported.])
281 #ifdef HAVE_HIDDEN_VISIBILITY_ATTRIBUTE
283 #define FFI_HIDDEN(name) .hidden name
285 #define FFI_HIDDEN __attribute__ ((visibility ("hidden")))
289 #define FFI_HIDDEN(name)
301 for i in $SOURCES; do
302 TARGET_OBJ="${TARGET_OBJ} src/${TARGETDIR}/"`echo $i | sed 's/[cS]$/lo/'`
310 [ --enable-debug debugging mode],
311 if test "$enable_debug" = "yes"; then
312 AC_DEFINE(FFI_DEBUG, 1, [Define this if you want extra debugging.])
314 AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes")
316 AC_ARG_ENABLE(structs,
317 [ --disable-structs omit code for struct support],
318 if test "$enable_structs" = "no"; then
319 AC_DEFINE(FFI_NO_STRUCTS, 1, [Define this if you do not want support for aggregate types.])
321 AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes")
323 AC_ARG_ENABLE(raw-api,
324 [ --disable-raw-api make the raw api unavailable],
325 if test "$enable_raw_api" = "no"; then
326 AC_DEFINE(FFI_NO_RAW_API, 1, [Define this if you do not want support for the raw API.])
329 AC_ARG_ENABLE(purify-safety,
330 [ --enable-purify-safety purify-safe mode],
331 if test "$enable_purify_safety" = "yes"; then
332 AC_DEFINE(USING_PURIFY, 1, [Define this if you are using Purify and want to suppress spurious messages.])
335 GCC_WITH_TOOLEXECLIBDIR
337 if test -n "$with_cross_host" &&
338 test x"$with_cross_host" != x"no"; then
339 toolexecdir='$(exec_prefix)/$(target_alias)'
340 case ${with_toolexeclibdir} in
342 toolexeclibdir='$(toolexecdir)/lib'
345 toolexeclibdir=${with_toolexeclibdir}
349 toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
350 toolexeclibdir='$(libdir)'
352 multi_os_directory=`$CC -print-multi-os-directory`
353 case $multi_os_directory in
354 .) ;; # Avoid trailing /.
355 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
357 AC_SUBST(toolexecdir)
358 AC_SUBST(toolexeclibdir)
360 if test "${multilib}" = "yes"; then
361 multilib_arg="--enable-multilib"
366 # Check linker support.
369 # Determine what GCC version number to use in filesystem paths.
372 AC_CONFIG_COMMANDS(include, [test -d include || mkdir include])
373 AC_CONFIG_COMMANDS(src, [
374 test -d src || mkdir src
375 test -d src/$TARGETDIR || mkdir src/$TARGETDIR
376 ], [TARGETDIR="$TARGETDIR"])
378 AC_CONFIG_LINKS(include/ffitarget.h:src/$TARGETDIR/ffitarget.h)
380 AC_CONFIG_FILES(include/Makefile include/ffi.h Makefile testsuite/Makefile man/Makefile libffi.pc)