1dnl Process this with autoconf to create configure 2 3AC_PREREQ(2.68) 4 5AC_INIT([libffi], [3.3], [http://github.com/libffi/libffi/issues]) 6AC_CONFIG_HEADERS([fficonfig.h]) 7 8AC_CANONICAL_SYSTEM 9target_alias=${target_alias-$host_alias} 10 11case "${host}" in 12 frv*-elf) 13 LDFLAGS=`echo $LDFLAGS | sed "s/\-B[^ ]*libgloss\/frv\///"`\ -B`pwd`/../libgloss/frv/ 14 ;; 15esac 16 17AX_ENABLE_BUILDDIR 18 19AM_INIT_AUTOMAKE 20 21# The same as in boehm-gc and libstdc++. Have to borrow it from there. 22# We must force CC to /not/ be precious variables; otherwise 23# the wrong, non-multilib-adjusted value will be used in multilibs. 24# As a side effect, we have to subst CFLAGS ourselves. 25# Also save and restore CFLAGS, since AC_PROG_CC will come up with 26# defaults of its own if none are provided. 27 28m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS]) 29m4_define([_AC_ARG_VAR_PRECIOUS],[]) 30save_CFLAGS=$CFLAGS 31AC_PROG_CC 32AC_PROG_CXX 33CFLAGS=$save_CFLAGS 34m4_undefine([_AC_ARG_VAR_PRECIOUS]) 35m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) 36 37AC_SUBST(CFLAGS) 38 39AM_PROG_AS 40AM_PROG_CC_C_O 41AC_PROG_LIBTOOL 42AC_CONFIG_MACRO_DIR([m4]) 43 44# Test for 64-bit build. 45AC_CHECK_SIZEOF([size_t]) 46 47AX_COMPILER_VENDOR 48AX_CC_MAXOPT 49# The AX_CFLAGS_WARN_ALL macro doesn't currently work for sunpro 50# compiler. 51if test "$ax_cv_c_compiler_vendor" != "sun"; then 52 AX_CFLAGS_WARN_ALL 53fi 54 55if test "x$GCC" = "xyes"; then 56 CFLAGS="$CFLAGS -fexceptions" 57fi 58 59cat > local.exp <<EOF 60set CC_FOR_TARGET "$CC" 61set CXX_FOR_TARGET "$CXX" 62EOF 63 64AM_MAINTAINER_MODE 65 66AC_CHECK_HEADERS(sys/mman.h) 67AC_CHECK_FUNCS([mmap mkostemp]) 68AC_FUNC_MMAP_BLACKLIST 69 70dnl The -no-testsuite modules omit the test subdir. 71AM_CONDITIONAL(TESTSUBDIR, test -d $srcdir/testsuite) 72 73TARGETDIR="unknown" 74HAVE_LONG_DOUBLE_VARIANT=0 75 76. ${srcdir}/configure.host 77 78if test -n "${UNSUPPORTED}"; then 79 AC_MSG_ERROR(["libffi has not been ported to $host."]) 80fi 81 82AC_SUBST(AM_RUNTESTFLAGS) 83AC_SUBST(AM_LTLDFLAGS) 84 85AC_HEADER_STDC 86AC_CHECK_FUNCS(memcpy) 87AC_FUNC_ALLOCA 88 89AC_CHECK_SIZEOF(double) 90AC_CHECK_SIZEOF(long double) 91 92# Also AC_SUBST this variable for ffi.h. 93if test -z "$HAVE_LONG_DOUBLE"; then 94 HAVE_LONG_DOUBLE=0 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]) 98 HAVE_LONG_DOUBLE=1 99 else 100 if test $ac_cv_sizeof_double != $ac_cv_sizeof_long_double; then 101 HAVE_LONG_DOUBLE=1 102 AC_DEFINE(HAVE_LONG_DOUBLE, 1, [Define if you have the long double type and it is bigger than a double]) 103 fi 104 fi 105 fi 106fi 107AC_SUBST(HAVE_LONG_DOUBLE) 108AC_SUBST(HAVE_LONG_DOUBLE_VARIANT) 109 110AC_C_BIGENDIAN 111 112GCC_AS_CFI_PSEUDO_OP 113 114case "$TARGET" in 115 SPARC) 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$libffi_cv_as_sparc_ua_pcrel" = xyes; then 128 AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1, 129 [Define if your assembler and linker support unaligned PC relative relocs.]) 130 fi 131 132 AC_CACHE_CHECK([assembler .register pseudo-op support], 133 libffi_cv_as_register_pseudo_op, [ 134 libffi_cv_as_register_pseudo_op=unknown 135 # Check if we have .register 136 AC_TRY_COMPILE(,[asm (".register %g2, #scratch");], 137 [libffi_cv_as_register_pseudo_op=yes], 138 [libffi_cv_as_register_pseudo_op=no]) 139 ]) 140 if test "x$libffi_cv_as_register_pseudo_op" = xyes; then 141 AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1, 142 [Define if your assembler supports .register.]) 143 fi 144 ;; 145 146 X86*) 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 $CFLAGS -c conftest.s > /dev/null 2>&1; then 152 libffi_cv_as_x86_pcrel=yes 153 fi 154 ]) 155 if test "x$libffi_cv_as_x86_pcrel" = xyes; then 156 AC_DEFINE(HAVE_AS_X86_PCREL, 1, 157 [Define if your assembler supports PC relative relocs.]) 158 fi 159 ;; 160 161 S390) 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 $CFLAGS -S conftest.c > /dev/null 2>&1; then 167 if grep -q brasl conftest.s; then 168 libffi_cv_as_s390_zarch=yes 169 fi 170 fi 171 ]) 172 if test "x$libffi_cv_as_s390_zarch" = xyes; then 173 AC_DEFINE(HAVE_AS_S390_ZARCH, 1, 174 [Define if the compiler uses zarch features.]) 175 fi 176 ;; 177esac 178 179# On PaX enable kernels that have MPROTECT enable we can't use PROT_EXEC. 180AC_ARG_ENABLE(pax_emutramp, 181 [ --enable-pax_emutramp enable pax emulated trampolines, for we can't use PROT_EXEC], 182 if test "$enable_pax_emutramp" = "yes"; then 183 AC_DEFINE(FFI_MMAP_EXEC_EMUTRAMP_PAX, 1, 184 [Define this if you want to enable pax emulated trampolines]) 185 fi) 186 187LT_SYS_SYMBOL_USCORE 188if test "x$sys_symbol_underscore" = xyes; then 189 AC_DEFINE(SYMBOL_UNDERSCORE, 1, [Define if symbols are underscored.]) 190fi 191 192FFI_EXEC_TRAMPOLINE_TABLE=0 193case "$target" in 194 DISABLED*arm*-apple-* | DISABLEDaarch64-apple-*) 195 FFI_EXEC_TRAMPOLINE_TABLE=1 196 AC_DEFINE(FFI_EXEC_TRAMPOLINE_TABLE, 1, 197 [Cannot use PROT_EXEC on this target, so, we revert to 198 alternative means]) 199 ;; 200 *-apple-* | *-*-freebsd* | *-*-kfreebsd* | *-*-openbsd* | *-pc-solaris* | *-linux-android*) 201 AC_DEFINE(FFI_MMAP_EXEC_WRIT, 1, 202 [Cannot use malloc on this target, so, we revert to 203 alternative means]) 204 ;; 205esac 206AM_CONDITIONAL(FFI_EXEC_TRAMPOLINE_TABLE, test x$FFI_EXEC_TRAMPOLINE_TABLE = x1) 207AC_SUBST(FFI_EXEC_TRAMPOLINE_TABLE) 208 209if test x$TARGET = xX86_64; then 210 AC_CACHE_CHECK([toolchain supports unwind section type], 211 libffi_cv_as_x86_64_unwind_section_type, [ 212 cat > conftest1.s << EOF 213.text 214.globl foo 215foo: 216jmp bar 217.section .eh_frame,"a",@unwind 218bar: 219EOF 220 221 cat > conftest2.c << EOF 222extern void foo(); 223int main(){foo();} 224EOF 225 226 libffi_cv_as_x86_64_unwind_section_type=no 227 # we ensure that we can compile _and_ link an assembly file containing an @unwind section 228 # since the compiler can support it and not the linker (ie old binutils) 229 if $CC -Wa,--fatal-warnings $CFLAGS -c conftest1.s > /dev/null 2>&1 && \ 230 $CC conftest2.c conftest1.o > /dev/null 2>&1 ; then 231 libffi_cv_as_x86_64_unwind_section_type=yes 232 fi 233 ]) 234 if test "x$libffi_cv_as_x86_64_unwind_section_type" = xyes; then 235 AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1, 236 [Define if your assembler supports unwind section type.]) 237 fi 238fi 239 240if test "x$GCC" = "xyes"; then 241 AC_CACHE_CHECK([whether .eh_frame section should be read-only], 242 libffi_cv_ro_eh_frame, [ 243 libffi_cv_ro_eh_frame=no 244 echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c 245 if $CC $CFLAGS -c -fpic -fexceptions -o conftest.o conftest.c > /dev/null 2>&1; then 246 objdump -h conftest.o > conftest.dump 2>&1 247 libffi_eh_frame_line=`grep -n eh_frame conftest.dump | cut -d: -f 1` 248 if test "x$libffi_eh_frame_line" != "x"; then 249 libffi_test_line=`expr $libffi_eh_frame_line + 1`p 250 sed -n $libffi_test_line conftest.dump > conftest.line 251 if grep READONLY conftest.line > /dev/null; then 252 libffi_cv_ro_eh_frame=yes 253 fi 254 fi 255 fi 256 rm -f conftest.* 257 ]) 258 if test "x$libffi_cv_ro_eh_frame" = xyes; then 259 AC_DEFINE(HAVE_RO_EH_FRAME, 1, 260 [Define if .eh_frame sections should be read-only.]) 261 AC_DEFINE(EH_FRAME_FLAGS, "a", 262 [Define to the flags needed for the .section .eh_frame directive. ]) 263 else 264 AC_DEFINE(EH_FRAME_FLAGS, "aw", 265 [Define to the flags needed for the .section .eh_frame directive. ]) 266 fi 267 268 AC_CACHE_CHECK([for __attribute__((visibility("hidden")))], 269 libffi_cv_hidden_visibility_attribute, [ 270 echo 'int __attribute__ ((visibility ("hidden"))) foo (void) { return 1 ; }' > conftest.c 271 libffi_cv_hidden_visibility_attribute=no 272 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then 273 if egrep '(\.hidden|\.private_extern).*foo' conftest.s >/dev/null; then 274 libffi_cv_hidden_visibility_attribute=yes 275 fi 276 fi 277 rm -f conftest.* 278 ]) 279 if test $libffi_cv_hidden_visibility_attribute = yes; then 280 AC_DEFINE(HAVE_HIDDEN_VISIBILITY_ATTRIBUTE, 1, 281 [Define if __attribute__((visibility("hidden"))) is supported.]) 282 fi 283fi 284 285AC_ARG_ENABLE(docs, 286 AC_HELP_STRING([--disable-docs], 287 [Disable building of docs (default: no)]), 288 [enable_docs=no], 289 [enable_docs=yes]) 290AM_CONDITIONAL(BUILD_DOCS, [test x$enable_docs = xyes]) 291 292AH_BOTTOM([ 293#ifdef HAVE_HIDDEN_VISIBILITY_ATTRIBUTE 294#ifdef LIBFFI_ASM 295#ifdef __APPLE__ 296#define FFI_HIDDEN(name) .private_extern name 297#else 298#define FFI_HIDDEN(name) .hidden name 299#endif 300#else 301#define FFI_HIDDEN __attribute__ ((visibility ("hidden"))) 302#endif 303#else 304#ifdef LIBFFI_ASM 305#define FFI_HIDDEN(name) 306#else 307#define FFI_HIDDEN 308#endif 309#endif 310]) 311 312AC_SUBST(TARGET) 313AC_SUBST(TARGETDIR) 314 315changequote(<,>) 316TARGET_OBJ= 317for i in $SOURCES; do 318 TARGET_OBJ="${TARGET_OBJ} src/${TARGETDIR}/"`echo $i | sed 's/[cS]$/lo/'` 319done 320changequote([,]) 321AC_SUBST(TARGET_OBJ) 322 323AC_SUBST(SHELL) 324 325AC_ARG_ENABLE(debug, 326[ --enable-debug debugging mode], 327 if test "$enable_debug" = "yes"; then 328 AC_DEFINE(FFI_DEBUG, 1, [Define this if you want extra debugging.]) 329 fi) 330AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes") 331 332AC_ARG_ENABLE(structs, 333[ --disable-structs omit code for struct support], 334 if test "$enable_structs" = "no"; then 335 AC_DEFINE(FFI_NO_STRUCTS, 1, [Define this if you do not want support for aggregate types.]) 336 fi) 337AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes") 338 339AC_ARG_ENABLE(raw-api, 340[ --disable-raw-api make the raw api unavailable], 341 if test "$enable_raw_api" = "no"; then 342 AC_DEFINE(FFI_NO_RAW_API, 1, [Define this if you do not want support for the raw API.]) 343 fi) 344 345AC_ARG_ENABLE(purify-safety, 346[ --enable-purify-safety purify-safe mode], 347 if test "$enable_purify_safety" = "yes"; then 348 AC_DEFINE(USING_PURIFY, 1, [Define this if you are using Purify and want to suppress spurious messages.]) 349 fi) 350 351AC_ARG_ENABLE(multi-os-directory, 352[ --disable-multi-os-directory 353 disable use of gcc --print-multi-os-directory to change the library installation directory]) 354 355# These variables are only ever used when we cross-build to X86_WIN32. 356# And we only support this with GCC, so... 357if test "x$GCC" = "xyes"; then 358 if test -n "$with_cross_host" && 359 test x"$with_cross_host" != x"no"; then 360 toolexecdir='${exec_prefix}'/'$(target_alias)' 361 toolexeclibdir='${toolexecdir}'/lib 362 else 363 toolexecdir='${libdir}'/gcc-lib/'$(target_alias)' 364 toolexeclibdir='${libdir}' 365 fi 366 if test x"$enable_multi_os_directory" != x"no"; then 367 multi_os_directory=`$CC $CFLAGS -print-multi-os-directory` 368 case $multi_os_directory in 369 .) ;; # Avoid trailing /. 370 ../*) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;; 371 esac 372 fi 373 AC_SUBST(toolexecdir) 374else 375 toolexeclibdir='${libdir}' 376fi 377AC_SUBST(toolexeclibdir) 378 379# Check linker support. 380LIBFFI_ENABLE_SYMVERS 381 382AC_CONFIG_COMMANDS(include, [test -d include || mkdir include]) 383AC_CONFIG_COMMANDS(src, [ 384test -d src || mkdir src 385test -d src/$TARGETDIR || mkdir src/$TARGETDIR 386], [TARGETDIR="$TARGETDIR"]) 387 388AC_CONFIG_FILES(include/Makefile include/ffi.h Makefile testsuite/Makefile man/Makefile doc/Makefile libffi.pc) 389 390AC_OUTPUT 391 392# Copy this file instead of using AC_CONFIG_LINK in order to support 393# compiling with MSVC, which won't understand cygwin style symlinks. 394cp ${srcdir}/src/$TARGETDIR/ffitarget.h include/ffitarget.h 395