libffi/configure.ac

   1 dnl Process this with autoconf to create configure
   2
   3 AC_PREREQ(2.64)
   4
   5 AC_INIT([libffi], [3.99999], [http://github.com/atgreen/libffi/issues])
   6 AC_CONFIG_HEADERS([fficonfig.h])
   7
   8 AM_ENABLE_MULTILIB(, ..)
   9
  10 AC_CANONICAL_SYSTEM
  11 target_alias=${target_alias-$host_alias}
  12
  13 AM_INIT_AUTOMAKE([no-dist])
  14
  15 # See if makeinfo has been installed and is modern enough
  16 # that we can use it.
  17 ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version],
  18                    [GNU texinfo.* \([0-9][0-9.]*\)],
  19                    [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
  20 AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes")
  21
  22 # We would like our source tree to be readonly. However when releases or
  23 # pre-releases are generated, the flex/bison generated files as well as the
  24 # various formats of manuals need to be included along with the rest of the
  25 # sources.  Therefore we have --enable-generated-files-in-srcdir to do
  26 # just that.
  27 AC_MSG_CHECKING(generated-files-in-srcdir)
  28 AC_ARG_ENABLE(generated-files-in-srcdir,
  29 AS_HELP_STRING([--enable-generated-files-in-srcdir],
  30  [put copies of generated files in source dir intended for creating source tarballs for users without texinfo bison or flex]),
  31 [case "$enableval" in
  32  yes) enable_generated_files_in_srcdir=yes ;;
  33  no)  enable_generated_files_in_srcdir=no ;;
  34  *)   AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
  35  esac],
  36 [enable_generated_files_in_srcdir=no])
  37 AC_MSG_RESULT($enable_generated_files_in_srcdir)
  38 AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes)
  39
  40 # The same as in boehm-gc and libstdc++. Have to borrow it from there.
  41 # We must force CC to /not/ be precious variables; otherwise
  42 # the wrong, non-multilib-adjusted value will be used in multilibs.
  43 # As a side effect, we have to subst CFLAGS ourselves.
  44 # Also save and restore CFLAGS, since AC_PROG_CC will come up with
  45 # defaults of its own if none are provided.
  46
  47 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
  48 m4_define([_AC_ARG_VAR_PRECIOUS],[])
  49 save_CFLAGS=$CFLAGS
  50 AC_PROG_CC
  51 AC_PROG_CXX
  52 CFLAGS=$save_CFLAGS
  53 m4_undefine([_AC_ARG_VAR_PRECIOUS])
  54 m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
  55
  56 AC_SUBST(CFLAGS)
  57
  58 AM_PROG_AS
  59 AM_PROG_CC_C_O
  60 AC_PROG_LIBTOOL
  61
  62 # Test for 64-bit build.
  63 AC_CHECK_SIZEOF([size_t])
  64
  65 AM_MAINTAINER_MODE
  66
  67 AC_CHECK_HEADERS(sys/mman.h)
  68 AC_CHECK_FUNCS([mmap mkostemp])
  69 AC_FUNC_MMAP_BLACKLIST
  70
  71 dnl The -no-testsuite modules omit the test subdir.
  72 AM_CONDITIONAL(TESTSUBDIR, test -d $srcdir/testsuite)
  73
  74 TARGETDIR="unknown"
  75 HAVE_LONG_DOUBLE_VARIANT=0
  76
  77 . ${srcdir}/configure.host
  78
  79 if test -n "${UNSUPPORTED}"; then
  80   AC_MSG_ERROR(["libffi has not been ported to $host."])
  81 fi
  82
  83 AC_SUBST(AM_RUNTESTFLAGS)
  84 AC_SUBST(AM_LTLDFLAGS)
  85
  86 AC_HEADER_STDC
  87 AC_CHECK_FUNCS(memcpy)
  88 AC_FUNC_ALLOCA
  89
  90 AC_CHECK_SIZEOF(double)
  91 AC_CHECK_SIZEOF(long double)
  92
  93 # Also AC_SUBST this variable for ffi.h.
  94 if test -z "$HAVE_LONG_DOUBLE"; then
  95   HAVE_LONG_DOUBLE=0
  96   if test $ac_cv_sizeof_long_double != 0; then
  97     if test $HAVE_LONG_DOUBLE_VARIANT != 0; then
  98       AC_DEFINE(HAVE_LONG_DOUBLE_VARIANT, 1, [Define if you support more than one size of the long double type])
  99       HAVE_LONG_DOUBLE=1
 100     else
 101       if test $ac_cv_sizeof_double != $ac_cv_sizeof_long_double; then
 102         HAVE_LONG_DOUBLE=1
 103         AC_DEFINE(HAVE_LONG_DOUBLE, 1, [Define if you have the long double type and it is bigger than a double])
 104       fi
 105     fi
 106   fi
 107 fi
 108 AC_SUBST(HAVE_LONG_DOUBLE)
 109 AC_SUBST(HAVE_LONG_DOUBLE_VARIANT)
 110
 111 AC_C_BIGENDIAN
 112
 113 GCC_AS_CFI_PSEUDO_OP
 114
 115 case "$TARGET" in
 116   SPARC)
 117     AC_CACHE_CHECK([assembler and linker support unaligned pc related relocs],
 118         libffi_cv_as_sparc_ua_pcrel, [
 119         save_CFLAGS="$CFLAGS"
 120         save_LDFLAGS="$LDFLAGS"
 121         CFLAGS="$CFLAGS -fpic"
 122         LDFLAGS="$LDFLAGS -shared"
 123         AC_TRY_LINK([asm (".text; foo: nop; .data; .align 4; .byte 0; .uaword %r_disp32(foo); .text");],,
 124                     [libffi_cv_as_sparc_ua_pcrel=yes],
 125                     [libffi_cv_as_sparc_ua_pcrel=no])
 126         CFLAGS="$save_CFLAGS"
 127         LDFLAGS="$save_LDFLAGS"])
 128     if test "x$libffi_cv_as_sparc_ua_pcrel" = xyes; then
 129         AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
 130                   [Define if your assembler and linker support unaligned PC relative relocs.])
 131     fi
 132
 133     AC_CACHE_CHECK([assembler .register pseudo-op support],
 134        libffi_cv_as_register_pseudo_op, [
 135        libffi_cv_as_register_pseudo_op=unknown
 136        # Check if we have .register
 137        AC_TRY_COMPILE(,[asm (".register %g2, #scratch");],
 138                        [libffi_cv_as_register_pseudo_op=yes],
 139                        [libffi_cv_as_register_pseudo_op=no])
 140     ])
 141     if test "x$libffi_cv_as_register_pseudo_op" = xyes; then
 142        AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
 143                [Define if your assembler supports .register.])
 144     fi
 145     ;;
 146
 147   X86*)
 148     AC_CACHE_CHECK([assembler supports pc related relocs],
 149         libffi_cv_as_x86_pcrel, [
 150         libffi_cv_as_x86_pcrel=no
 151         echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
 152         if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
 153             libffi_cv_as_x86_pcrel=yes
 154         fi
 155         ])
 156     if test "x$libffi_cv_as_x86_pcrel" = xyes; then
 157         AC_DEFINE(HAVE_AS_X86_PCREL, 1,
 158                   [Define if your assembler supports PC relative relocs.])
 159     fi
 160     ;;
 161
 162   S390)
 163     AC_CACHE_CHECK([compiler uses zarch features],
 164         libffi_cv_as_s390_zarch, [
 165         libffi_cv_as_s390_zarch=no
 166         echo 'void foo(void) { bar(); bar(); }' > conftest.c
 167         if $CC $CFLAGS -S conftest.c > /dev/null 2>&1; then
 168             if grep -q brasl conftest.s; then
 169                 libffi_cv_as_s390_zarch=yes
 170             fi
 171         fi
 172         ])
 173     if test "x$libffi_cv_as_s390_zarch" = xyes; then
 174         AC_DEFINE(HAVE_AS_S390_ZARCH, 1,
 175                   [Define if the compiler uses zarch features.])
 176     fi
 177     ;;
 178 esac
 179
 180 # On PaX enable kernels that have MPROTECT enable we can't use PROT_EXEC.
 181 AC_ARG_ENABLE(pax_emutramp,
 182   [  --enable-pax_emutramp       enable pax emulated trampolines, for we can't use PROT_EXEC],
 183   if test "$enable_pax_emutramp" = "yes"; then
 184     AC_DEFINE(FFI_MMAP_EXEC_EMUTRAMP_PAX, 1,
 185       [Define this if you want to enable pax emulated trampolines])
 186   fi)
 187
 188 FFI_EXEC_TRAMPOLINE_TABLE=0
 189 case "$target" in
 190      *arm*-apple-darwin* | aarch64-apple-darwin*)
 191        FFI_EXEC_TRAMPOLINE_TABLE=1
 192        AC_DEFINE(FFI_EXEC_TRAMPOLINE_TABLE, 1,
 193                  [Cannot use PROT_EXEC on this target, so, we revert to
 194                    alternative means])
 195      ;;
 196      *-apple-darwin1* | *-*-freebsd* | *-*-kfreebsd* | *-*-openbsd* | *-pc-solaris*)
 197        AC_DEFINE(FFI_MMAP_EXEC_WRIT, 1,
 198                  [Cannot use malloc on this target, so, we revert to
 199                    alternative means])
 200      ;;
 201 esac
 202 AM_CONDITIONAL(FFI_EXEC_TRAMPOLINE_TABLE, test x$FFI_EXEC_TRAMPOLINE_TABLE = x1)
 203 AC_SUBST(FFI_EXEC_TRAMPOLINE_TABLE)
 204
 205 if test x$TARGET = xX86_64; then
 206     AC_CACHE_CHECK([toolchain supports unwind section type],
 207         libffi_cv_as_x86_64_unwind_section_type, [
 208         cat  > conftest1.s << EOF
 209 .text
 210 .globl foo
 211 foo:
 212 jmp bar
 213 .section .eh_frame,"a",@unwind
 214 bar:
 215 EOF
 216
 217         cat > conftest2.c  << EOF
 218 extern void foo();
 219 int main(){foo();}
 220 EOF
 221
 222         libffi_cv_as_x86_64_unwind_section_type=no
 223         # we ensure that we can compile _and_ link an assembly file containing an @unwind section
 224         # since the compiler can support it and not the linker (ie old binutils)
 225         if $CC -Wa,--fatal-warnings $CFLAGS -c conftest1.s > /dev/null 2>&1 && \
 226            $CC conftest2.c conftest1.o > /dev/null 2>&1 ; then
 227             libffi_cv_as_x86_64_unwind_section_type=yes
 228         fi
 229         ])
 230     if test "x$libffi_cv_as_x86_64_unwind_section_type" = xyes; then
 231         AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
 232                   [Define if your assembler supports unwind section type.])
 233     fi
 234 fi
 235
 236 if test "x$GCC" = "xyes"; then
 237   AC_CACHE_CHECK([whether .eh_frame section should be read-only],
 238       libffi_cv_ro_eh_frame, [
 239         libffi_cv_ro_eh_frame=no
 240         echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
 241         if $CC $CFLAGS -c -fpic -fexceptions -o conftest.o conftest.c > /dev/null 2>&1; then
 242             objdump -h conftest.o > conftest.dump 2>&1
 243             libffi_eh_frame_line=`grep -n eh_frame conftest.dump | cut -d: -f 1`
 244             if test "x$libffi_eh_frame_line" != "x"; then
 245                 libffi_test_line=`expr $libffi_eh_frame_line + 1`p
 246                 sed -n $libffi_test_line conftest.dump > conftest.line
 247                 if grep READONLY conftest.line > /dev/null; then
 248                     libffi_cv_ro_eh_frame=yes
 249                 fi
 250             fi
 251         fi
 252         rm -f conftest.*
 253       ])
 254   if test "x$libffi_cv_ro_eh_frame" = xyes; then
 255       AC_DEFINE(HAVE_RO_EH_FRAME, 1,
 256               [Define if .eh_frame sections should be read-only.])
 257       AC_DEFINE(EH_FRAME_FLAGS, "a",
 258               [Define to the flags needed for the .section .eh_frame directive.  ])
 259   else
 260       AC_DEFINE(EH_FRAME_FLAGS, "aw",
 261               [Define to the flags needed for the .section .eh_frame directive.  ])
 262   fi
 263
 264   AC_CACHE_CHECK([for __attribute__((visibility("hidden")))],
 265       libffi_cv_hidden_visibility_attribute, [
 266         echo 'int __attribute__ ((visibility ("hidden"))) foo (void) { return 1  ; }' > conftest.c
 267         libffi_cv_hidden_visibility_attribute=no
 268         if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
 269             if grep '\.hidden.*foo' conftest.s >/dev/null; then
 270                 libffi_cv_hidden_visibility_attribute=yes
 271             fi
 272         fi
 273         rm -f conftest.*
 274       ])
 275   if test $libffi_cv_hidden_visibility_attribute = yes; then
 276       AC_DEFINE(HAVE_HIDDEN_VISIBILITY_ATTRIBUTE, 1,
 277               [Define if __attribute__((visibility("hidden"))) is supported.])
 278   fi
 279 fi
 280
 281 AH_BOTTOM([
 282 #ifdef HAVE_HIDDEN_VISIBILITY_ATTRIBUTE
 283 #ifdef LIBFFI_ASM
 284 #define FFI_HIDDEN(name) .hidden name
 285 #else
 286 #define FFI_HIDDEN __attribute__ ((visibility ("hidden")))
 287 #endif
 288 #else
 289 #ifdef LIBFFI_ASM
 290 #define FFI_HIDDEN(name)
 291 #else
 292 #define FFI_HIDDEN
 293 #endif
 294 #endif
 295 ])
 296
 297 AC_SUBST(TARGET)
 298 AC_SUBST(TARGETDIR)
 299
 300 changequote(<,>)
 301 TARGET_OBJ=
 302 for i in $SOURCES; do
 303   TARGET_OBJ="${TARGET_OBJ} src/${TARGETDIR}/"`echo $i | sed 's/[cS]$/lo/'`
 304 done
 305 changequote([,])
 306 AC_SUBST(TARGET_OBJ)
 307
 308 AC_SUBST(SHELL)
 309
 310 AC_ARG_ENABLE(debug,
 311 [  --enable-debug          debugging mode],
 312   if test "$enable_debug" = "yes"; then
 313     AC_DEFINE(FFI_DEBUG, 1, [Define this if you want extra debugging.])
 314   fi)
 315 AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes")
 316
 317 AC_ARG_ENABLE(structs,
 318 [  --disable-structs       omit code for struct support],
 319   if test "$enable_structs" = "no"; then
 320     AC_DEFINE(FFI_NO_STRUCTS, 1, [Define this if you do not want support for aggregate types.])
 321   fi)
 322 AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes")
 323
 324 AC_ARG_ENABLE(raw-api,
 325 [  --disable-raw-api       make the raw api unavailable],
 326   if test "$enable_raw_api" = "no"; then
 327     AC_DEFINE(FFI_NO_RAW_API, 1, [Define this if you do not want support for the raw API.])
 328   fi)
 329
 330 AC_ARG_ENABLE(purify-safety,
 331 [  --enable-purify-safety  purify-safe mode],
 332   if test "$enable_purify_safety" = "yes"; then
 333     AC_DEFINE(USING_PURIFY, 1, [Define this if you are using Purify and want to suppress spurious messages.])
 334   fi)
 335
 336 if test -n "$with_cross_host" &&
 337    test x"$with_cross_host" != x"no"; then
 338   toolexecdir='$(exec_prefix)/$(target_alias)'
 339   toolexeclibdir='$(toolexecdir)/lib'
 340 else
 341   toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
 342   toolexeclibdir='$(libdir)'
 343 fi
 344 multi_os_directory=`$CC -print-multi-os-directory`
 345 case $multi_os_directory in
 346   .) ;; # Avoid trailing /.
 347   *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
 348 esac
 349 AC_SUBST(toolexecdir)
 350 AC_SUBST(toolexeclibdir)
 351
 352 if test "${multilib}" = "yes"; then
 353   multilib_arg="--enable-multilib"
 354 else
 355   multilib_arg=
 356 fi
 357
 358 AC_CONFIG_COMMANDS(include, [test -d include || mkdir include])
 359 AC_CONFIG_COMMANDS(src, [
 360 test -d src || mkdir src
 361 test -d src/$TARGETDIR || mkdir src/$TARGETDIR
 362 ], [TARGETDIR="$TARGETDIR"])
 363
 364 AC_CONFIG_LINKS(include/ffitarget.h:src/$TARGETDIR/ffitarget.h)
 365
 366 AC_CONFIG_FILES(include/Makefile include/ffi.h Makefile testsuite/Makefile man/Makefile libffi.pc)
 367
 368 AC_OUTPUT