libffi/configure.ac

   1 dnl Process this with autoconf to create configure
   2
   3
   4 AC_INIT([libffi], [3.99999], [http://github.com/atgreen/libffi/issues])
   5 AC_CONFIG_HEADERS([fficonfig.h])
   6
   7 AM_ENABLE_MULTILIB(, ..)
   8
   9 AC_CANONICAL_SYSTEM
  10 target_alias=${target_alias-$host_alias}
  11
  12 AM_INIT_AUTOMAKE([no-dist])
  13
  14 # See if makeinfo has been installed and is modern enough
  15 # that we can use it.
  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 $gcc_cv_prog_makeinfo_modern = "yes")
  20
  21 # We would like our source tree to be readonly. However when releases or
  22 # pre-releases are generated, the flex/bison generated files as well as the
  23 # various formats of manuals need to be included along with the rest of the
  24 # sources.  Therefore we have --enable-generated-files-in-srcdir to do
  25 # just that.
  26 AC_MSG_CHECKING(generated-files-in-srcdir)
  27 AC_ARG_ENABLE(generated-files-in-srcdir,
  28 AS_HELP_STRING([--enable-generated-files-in-srcdir],
  29  [put copies of generated files in source dir intended for creating source tarballs for users without texinfo bison or flex]),
  30 [case "$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])
  36 AC_MSG_RESULT($enable_generated_files_in_srcdir)
  37 AM_CONDITIONAL(GENINSRC, test "$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
  46 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
  47 m4_define([_AC_ARG_VAR_PRECIOUS],[])
  48 save_CFLAGS=$CFLAGS
  49 AC_PROG_CC
  50 AC_PROG_CXX
  51 CFLAGS=$save_CFLAGS
  52 m4_undefine([_AC_ARG_VAR_PRECIOUS])
  53 m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
  54
  55 AC_SUBST(CFLAGS)
  56
  57 AM_PROG_AS
  58 AM_PROG_CC_C_O
  59 AC_PROG_LIBTOOL
  60
  61 # Test for 64-bit build.
  62 AC_CHECK_SIZEOF([size_t])
  63
  64 cat > local.exp <<EOF
  65 set CC_FOR_TARGET "$CC"
  66 set CXX_FOR_TARGET "$CXX"
  67 EOF
  68
  69 AM_MAINTAINER_MODE
  70
  71 AC_CHECK_HEADERS(sys/mman.h)
  72 AC_CHECK_FUNCS([mmap mkostemp])
  73 AC_FUNC_MMAP_BLACKLIST
  74
  75 dnl The -no-testsuite modules omit the test subdir.
  76 AM_CONDITIONAL(TESTSUBDIR, test -d $srcdir/testsuite)
  77
  78 TARGETDIR="unknown"
  79 HAVE_LONG_DOUBLE_VARIANT=0
  80
  81 . ${srcdir}/configure.host
  82
  83 if test -n "${UNSUPPORTED}"; then
  84   AC_MSG_ERROR(["libffi has not been ported to $host."])
  85 fi
  86
  87 AC_SUBST(AM_RUNTESTFLAGS)
  88 AC_SUBST(AM_LTLDFLAGS)
  89
  90 AC_HEADER_STDC
  91 AC_CHECK_FUNCS(memcpy)
  92 AC_FUNC_ALLOCA
  93
  94 AC_CHECK_SIZEOF(double)
  95 AC_CHECK_SIZEOF(long double)
  96
  97 # Also AC_SUBST this variable for ffi.h.
  98 if test -z "$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 != $ac_cv_sizeof_long_double; then
 106         HAVE_LONG_DOUBLE=1
 107         AC_DEFINE(HAVE_LONG_DOUBLE, 1, [Define if you have the long double type and it is bigger than a double])
 108       fi
 109     fi
 110   fi
 111 fi
 112 AC_SUBST(HAVE_LONG_DOUBLE)
 113 AC_SUBST(HAVE_LONG_DOUBLE_VARIANT)
 114
 115 AC_C_BIGENDIAN
 116
 117 GCC_AS_CFI_PSEUDO_OP
 118
 119 case "$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     ;;
 182 esac
 183
 184 # On PaX enable kernels that have MPROTECT enable we can't use PROT_EXEC.
 185 AC_ARG_ENABLE(pax_emutramp,
 186   [  --enable-pax_emutramp       enable pax emulated trampolines, for we can't use PROT_EXEC],
 187   if test "$enable_pax_emutramp" = "yes"; then
 188     AC_DEFINE(FFI_MMAP_EXEC_EMUTRAMP_PAX, 1,
 189       [Define this if you want to enable pax emulated trampolines])
 190   fi)
 191
 192 FFI_EXEC_TRAMPOLINE_TABLE=0
 193 case "$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      ;;
 205 esac
 206 AM_CONDITIONAL(FFI_EXEC_TRAMPOLINE_TABLE, test x$FFI_EXEC_TRAMPOLINE_TABLE = x1)
 207 AC_SUBST(FFI_EXEC_TRAMPOLINE_TABLE)
 208
 209 if test x$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
 215 foo:
 216 jmp bar
 217 .section .eh_frame,"a",@unwind
 218 bar:
 219 EOF
 220
 221         cat > conftest2.c  << EOF
 222 extern void foo();
 223 int main(){foo();}
 224 EOF
 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
 238 fi
 239
 240 if 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
 283 fi
 284
 285 AH_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
 301 AC_SUBST(TARGET)
 302 AC_SUBST(TARGETDIR)
 303
 304 changequote(<,>)
 305 TARGET_OBJ=
 306 for i in $SOURCES; do
 307   TARGET_OBJ="${TARGET_OBJ} src/${TARGETDIR}/"`echo $i | sed 's/[cS]$/lo/'`
 308 done
 309 changequote([,])
 310 AC_SUBST(TARGET_OBJ)
 311
 312 AC_SUBST(SHELL)
 313
 314 AC_ARG_ENABLE(debug,
 315 [  --enable-debug          debugging mode],
 316   if test "$enable_debug" = "yes"; then
 317     AC_DEFINE(FFI_DEBUG, 1, [Define this if you want extra debugging.])
 318   fi)
 319 AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes")
 320
 321 AC_ARG_ENABLE(structs,
 322 [  --disable-structs       omit code for struct support],
 323   if test "$enable_structs" = "no"; then
 324     AC_DEFINE(FFI_NO_STRUCTS, 1, [Define this if you do not want support for aggregate types.])
 325   fi)
 326 AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes")
 327
 328 AC_ARG_ENABLE(raw-api,
 329 [  --disable-raw-api       make the raw api unavailable],
 330   if test "$enable_raw_api" = "no"; then
 331     AC_DEFINE(FFI_NO_RAW_API, 1, [Define this if you do not want support for the raw API.])
 332   fi)
 333
 334 AC_ARG_ENABLE(purify-safety,
 335 [  --enable-purify-safety  purify-safe mode],
 336   if test "$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
 340 GCC_WITH_TOOLEXECLIBDIR
 341
 342 if 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=${with_toolexeclibdir}
 351       ;;
 352   esac
 353 else
 354   toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
 355   toolexeclibdir='$(libdir)'
 356 fi
 357 multi_os_directory=`$CC -print-multi-os-directory`
 358 case $multi_os_directory in
 359   .) ;; # Avoid trailing /.
 360   *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
 361 esac
 362 AC_SUBST(toolexecdir)
 363 AC_SUBST(toolexeclibdir)
 364
 365 if test "${multilib}" = "yes"; then
 366   multilib_arg="--enable-multilib"
 367 else
 368   multilib_arg=
 369 fi
 370
 371 # Check linker support.
 372 LIBAT_ENABLE_SYMVERS
 373
 374 # Determine what GCC version number to use in filesystem paths.
 375 GCC_BASE_VER
 376
 377 AC_CONFIG_COMMANDS(include, [test -d include || mkdir include])
 378 AC_CONFIG_COMMANDS(src, [
 379 test -d src || mkdir src
 380 test -d src/$TARGETDIR || mkdir src/$TARGETDIR
 381 ], [TARGETDIR="$TARGETDIR"])
 382
 383 AC_CONFIG_LINKS(include/ffitarget.h:src/$TARGETDIR/ffitarget.h)
 384
 385 AC_CONFIG_FILES(include/Makefile include/ffi.h Makefile testsuite/Makefile man/Makefile libffi.pc)
 386
 387 AC_OUTPUT