1dnl Process this with autoconf to create configure 2 3 4AC_INIT([libffi], [3.99999], [http://github.com/atgreen/libffi/issues]) 5AC_CONFIG_HEADERS([fficonfig.h]) 6 7AM_ENABLE_MULTILIB(, ..) 8 9AC_CANONICAL_SYSTEM 10target_alias=${target_alias-$host_alias} 11 12AM_INIT_AUTOMAKE([no-dist]) 13 14# See if makeinfo has been installed and is modern enough 15# that we can use it. 16ACX_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]*]) 19AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes") 20 21# We would like our source tree to be readonly. However when releases or 22# pre-releases are generated, the flex/bison generated files as well as the 23# various formats of manuals need to be included along with the rest of the 24# sources. Therefore we have --enable-generated-files-in-srcdir to do 25# just that. 26AC_MSG_CHECKING(generated-files-in-srcdir) 27AC_ARG_ENABLE(generated-files-in-srcdir, 28AS_HELP_STRING([--enable-generated-files-in-srcdir], 29 [put copies of generated files in source dir intended for creating source tarballs for users without texinfo bison or flex]), 30[case "$enableval" in 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]);; 34 esac], 35[enable_generated_files_in_srcdir=no]) 36AC_MSG_RESULT($enable_generated_files_in_srcdir) 37AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes) 38 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. 45 46m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS]) 47m4_define([_AC_ARG_VAR_PRECIOUS],[]) 48save_CFLAGS=$CFLAGS 49AC_PROG_CC 50AC_PROG_CXX 51CFLAGS=$save_CFLAGS 52m4_undefine([_AC_ARG_VAR_PRECIOUS]) 53m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) 54 55AC_SUBST(CFLAGS) 56 57AM_PROG_AS 58AM_PROG_CC_C_O 59AC_PROG_LIBTOOL 60 61# Test for 64-bit build. 62AC_CHECK_SIZEOF([size_t]) 63 64cat > local.exp <<EOF 65set CC_FOR_TARGET "$CC" 66set CXX_FOR_TARGET "$CXX" 67EOF 68 69AM_MAINTAINER_MODE 70 71AC_CHECK_HEADERS(sys/mman.h) 72AC_CHECK_FUNCS([mmap mkostemp]) 73AC_FUNC_MMAP_BLACKLIST 74 75dnl The -no-testsuite modules omit the test subdir. 76AM_CONDITIONAL(TESTSUBDIR, test -d $srcdir/testsuite) 77 78TARGETDIR="unknown" 79HAVE_LONG_DOUBLE_VARIANT=0 80 81. ${srcdir}/configure.host 82 83if test -n "${UNSUPPORTED}"; then 84 AC_MSG_ERROR(["libffi has not been ported to $host."]) 85fi 86 87AC_SUBST(AM_RUNTESTFLAGS) 88AC_SUBST(AM_LTLDFLAGS) 89 90AC_HEADER_STDC 91AC_CHECK_FUNCS(memcpy) 92AC_FUNC_ALLOCA 93 94AC_CHECK_SIZEOF(double) 95AC_CHECK_SIZEOF(long double) 96 97# Also AC_SUBST this variable for ffi.h. 98if test -z "$HAVE_LONG_DOUBLE"; then 99 HAVE_LONG_DOUBLE=0 100 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]) 103 HAVE_LONG_DOUBLE=1 104 else 105 if test $ac_cv_sizeof_double != $ac_cv_sizeof_long_double; then 106 HAVE_LONG_DOUBLE=1 107 AC_DEFINE(HAVE_LONG_DOUBLE, 1, [Define if you have the long double type and it is bigger than a double]) 108 fi 109 fi 110 fi 111fi 112AC_SUBST(HAVE_LONG_DOUBLE) 113AC_SUBST(HAVE_LONG_DOUBLE_VARIANT) 114 115AC_C_BIGENDIAN 116 117GCC_AS_CFI_PSEUDO_OP 118 119case "$TARGET" in 120 SPARC) 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$libffi_cv_as_sparc_ua_pcrel" = xyes; then 133 AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1, 134 [Define if your assembler and linker support unaligned PC relative relocs.]) 135 fi 136 137 AC_CACHE_CHECK([assembler .register pseudo-op support], 138 libffi_cv_as_register_pseudo_op, [ 139 libffi_cv_as_register_pseudo_op=unknown 140 # Check if we have .register 141 AC_TRY_COMPILE(,[asm (".register %g2, #scratch");], 142 [libffi_cv_as_register_pseudo_op=yes], 143 [libffi_cv_as_register_pseudo_op=no]) 144 ]) 145 if test "x$libffi_cv_as_register_pseudo_op" = xyes; then 146 AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1, 147 [Define if your assembler supports .register.]) 148 fi 149 ;; 150 151 X86*) 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 $CFLAGS -c conftest.s > /dev/null 2>&1; then 157 libffi_cv_as_x86_pcrel=yes 158 fi 159 ]) 160 if test "x$libffi_cv_as_x86_pcrel" = xyes; then 161 AC_DEFINE(HAVE_AS_X86_PCREL, 1, 162 [Define if your assembler supports PC relative relocs.]) 163 fi 164 ;; 165 166 S390) 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 $CFLAGS -S conftest.c > /dev/null 2>&1; then 172 if grep -q brasl conftest.s; then 173 libffi_cv_as_s390_zarch=yes 174 fi 175 fi 176 ]) 177 if test "x$libffi_cv_as_s390_zarch" = xyes; then 178 AC_DEFINE(HAVE_AS_S390_ZARCH, 1, 179 [Define if the compiler uses zarch features.]) 180 fi 181 ;; 182esac 183 184# On PaX enable kernels that have MPROTECT enable we can't use PROT_EXEC. 185AC_ARG_ENABLE(pax_emutramp, 186 [ --enable-pax_emutramp enable pax emulated trampolines, for we can't use PROT_EXEC], 187 if test "$enable_pax_emutramp" = "yes"; then 188 AC_DEFINE(FFI_MMAP_EXEC_EMUTRAMP_PAX, 1, 189 [Define this if you want to enable pax emulated trampolines]) 190 fi) 191 192FFI_EXEC_TRAMPOLINE_TABLE=0 193case "$target" in 194 *arm*-apple-darwin* | aarch64-apple-darwin*) 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-darwin1* | *-*-freebsd* | *-*-kfreebsd* | *-*-openbsd* | *-pc-solaris*) 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 grep '\.hidden.*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 285AH_BOTTOM([ 286#ifdef HAVE_HIDDEN_VISIBILITY_ATTRIBUTE 287#ifdef LIBFFI_ASM 288#define FFI_HIDDEN(name) .hidden name 289#else 290#define FFI_HIDDEN __attribute__ ((visibility ("hidden"))) 291#endif 292#else 293#ifdef LIBFFI_ASM 294#define FFI_HIDDEN(name) 295#else 296#define FFI_HIDDEN 297#endif 298#endif 299]) 300 301AC_SUBST(TARGET) 302AC_SUBST(TARGETDIR) 303 304changequote(<,>) 305TARGET_OBJ= 306for i in $SOURCES; do 307 TARGET_OBJ="${TARGET_OBJ} src/${TARGETDIR}/"`echo $i | sed 's/[cS]$/lo/'` 308done 309changequote([,]) 310AC_SUBST(TARGET_OBJ) 311 312AC_SUBST(SHELL) 313 314AC_ARG_ENABLE(debug, 315[ --enable-debug debugging mode], 316 if test "$enable_debug" = "yes"; then 317 AC_DEFINE(FFI_DEBUG, 1, [Define this if you want extra debugging.]) 318 fi) 319AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes") 320 321AC_ARG_ENABLE(structs, 322[ --disable-structs omit code for struct support], 323 if test "$enable_structs" = "no"; then 324 AC_DEFINE(FFI_NO_STRUCTS, 1, [Define this if you do not want support for aggregate types.]) 325 fi) 326AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes") 327 328AC_ARG_ENABLE(raw-api, 329[ --disable-raw-api make the raw api unavailable], 330 if test "$enable_raw_api" = "no"; then 331 AC_DEFINE(FFI_NO_RAW_API, 1, [Define this if you do not want support for the raw API.]) 332 fi) 333 334AC_ARG_ENABLE(purify-safety, 335[ --enable-purify-safety purify-safe mode], 336 if test "$enable_purify_safety" = "yes"; then 337 AC_DEFINE(USING_PURIFY, 1, [Define this if you are using Purify and want to suppress spurious messages.]) 338 fi) 339 340GCC_WITH_TOOLEXECLIBDIR 341 342if test -n "$with_cross_host" && 343 test x"$with_cross_host" != x"no"; then 344 toolexecdir='$(exec_prefix)/$(target_alias)' 345 case ${with_toolexeclibdir} in 346 no) 347 toolexeclibdir='$(toolexecdir)/lib' 348 ;; 349 *) 350 toolexeclibdir=${with_toolexeclibdir} 351 ;; 352 esac 353else 354 toolexecdir='$(libdir)/gcc-lib/$(target_alias)' 355 toolexeclibdir='$(libdir)' 356fi 357multi_os_directory=`$CC -print-multi-os-directory` 358case $multi_os_directory in 359 .) ;; # Avoid trailing /. 360 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;; 361esac 362AC_SUBST(toolexecdir) 363AC_SUBST(toolexeclibdir) 364 365if test "${multilib}" = "yes"; then 366 multilib_arg="--enable-multilib" 367else 368 multilib_arg= 369fi 370 371# Check linker support. 372LIBAT_ENABLE_SYMVERS 373 374# Determine what GCC version number to use in filesystem paths. 375GCC_BASE_VER 376 377AC_CONFIG_COMMANDS(include, [test -d include || mkdir include]) 378AC_CONFIG_COMMANDS(src, [ 379test -d src || mkdir src 380test -d src/$TARGETDIR || mkdir src/$TARGETDIR 381], [TARGETDIR="$TARGETDIR"]) 382 383AC_CONFIG_LINKS(include/ffitarget.h:src/$TARGETDIR/ffitarget.h) 384 385AC_CONFIG_FILES(include/Makefile include/ffi.h Makefile testsuite/Makefile man/Makefile libffi.pc) 386 387AC_OUTPUT 388