[thirdparty/gcc.git] / libffi / configure.ac

dnl Process this with autoconf to create configure


AC_INIT([libffi], [3.99999], [http://github.com/atgreen/libffi/issues])
AC_CONFIG_HEADERS([fficonfig.h])

AM_ENABLE_MULTILIB(, ..)

AC_CANONICAL_SYSTEM
target_alias=${target_alias-$host_alias}

AM_INIT_AUTOMAKE([no-dist])

# See if makeinfo has been installed and is modern enough
# that we can use it.
ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version],
                   [GNU texinfo.* \([0-9][0-9.]*\)],
                   [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes")

# We would like our source tree to be readonly. However when releases or
# pre-releases are generated, the flex/bison generated files as well as the
# various formats of manuals need to be included along with the rest of the
# sources.  Therefore we have --enable-generated-files-in-srcdir to do
# just that.
AC_MSG_CHECKING(generated-files-in-srcdir)
AC_ARG_ENABLE(generated-files-in-srcdir,
AS_HELP_STRING([--enable-generated-files-in-srcdir],
 [put copies of generated files in source dir intended for creating source tarballs for users without texinfo bison or flex]),
[case "$enableval" in
 yes) enable_generated_files_in_srcdir=yes ;;
 no)  enable_generated_files_in_srcdir=no ;;
 *)   AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
 esac],
[enable_generated_files_in_srcdir=no])
AC_MSG_RESULT($enable_generated_files_in_srcdir)
AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes)

# The same as in boehm-gc and libstdc++. Have to borrow it from there.
# We must force CC to /not/ be precious variables; otherwise
# the wrong, non-multilib-adjusted value will be used in multilibs.
# As a side effect, we have to subst CFLAGS ourselves.
# Also save and restore CFLAGS, since AC_PROG_CC will come up with
# defaults of its own if none are provided.

m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
m4_define([_AC_ARG_VAR_PRECIOUS],[])
save_CFLAGS=$CFLAGS
AC_PROG_CC
AC_PROG_CXX
CFLAGS=$save_CFLAGS
m4_undefine([_AC_ARG_VAR_PRECIOUS])
m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])

AC_SUBST(CFLAGS)

AM_PROG_AS
AM_PROG_CC_C_O
AC_PROG_LIBTOOL

# Test for 64-bit build.
AC_CHECK_SIZEOF([size_t])

AM_MAINTAINER_MODE

AC_CHECK_HEADERS(sys/mman.h)
AC_CHECK_FUNCS([mmap mkostemp])
AC_FUNC_MMAP_BLACKLIST

dnl The -no-testsuite modules omit the test subdir.
AM_CONDITIONAL(TESTSUBDIR, test -d $srcdir/testsuite)

TARGETDIR="unknown"
HAVE_LONG_DOUBLE_VARIANT=0

. ${srcdir}/configure.host

if test -n "${UNSUPPORTED}"; then
  AC_MSG_ERROR(["libffi has not been ported to $host."])
fi

AC_SUBST(AM_RUNTESTFLAGS)
AC_SUBST(AM_LTLDFLAGS)

AC_HEADER_STDC
AC_CHECK_FUNCS(memcpy)
AC_FUNC_ALLOCA

AC_CHECK_SIZEOF(double)
AC_CHECK_SIZEOF(long double)

# Also AC_SUBST this variable for ffi.h.
if test -z "$HAVE_LONG_DOUBLE"; then
  HAVE_LONG_DOUBLE=0
  if test $ac_cv_sizeof_long_double != 0; then
    if test $HAVE_LONG_DOUBLE_VARIANT != 0; then
      AC_DEFINE(HAVE_LONG_DOUBLE_VARIANT, 1, [Define if you support more than one size of the long double type])
      HAVE_LONG_DOUBLE=1
    else
      if test $ac_cv_sizeof_double != $ac_cv_sizeof_long_double; then
        HAVE_LONG_DOUBLE=1
        AC_DEFINE(HAVE_LONG_DOUBLE, 1, [Define if you have the long double type and it is bigger than a double])
      fi
    fi
  fi
fi
AC_SUBST(HAVE_LONG_DOUBLE)
AC_SUBST(HAVE_LONG_DOUBLE_VARIANT)

AC_C_BIGENDIAN

GCC_AS_CFI_PSEUDO_OP

case "$TARGET" in
  SPARC)
    AC_CACHE_CHECK([assembler and linker support unaligned pc related relocs],
	libffi_cv_as_sparc_ua_pcrel, [
	save_CFLAGS="$CFLAGS"
	save_LDFLAGS="$LDFLAGS"
	CFLAGS="$CFLAGS -fpic"
	LDFLAGS="$LDFLAGS -shared"
	AC_TRY_LINK([asm (".text; foo: nop; .data; .align 4; .byte 0; .uaword %r_disp32(foo); .text");],,
		    [libffi_cv_as_sparc_ua_pcrel=yes],
		    [libffi_cv_as_sparc_ua_pcrel=no])
	CFLAGS="$save_CFLAGS"
	LDFLAGS="$save_LDFLAGS"])
    if test "x$libffi_cv_as_sparc_ua_pcrel" = xyes; then
	AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
		  [Define if your assembler and linker support unaligned PC relative relocs.])
    fi

    AC_CACHE_CHECK([assembler .register pseudo-op support],
       libffi_cv_as_register_pseudo_op, [
       libffi_cv_as_register_pseudo_op=unknown
       # Check if we have .register
       AC_TRY_COMPILE(,[asm (".register %g2, #scratch");],
		       [libffi_cv_as_register_pseudo_op=yes],
		       [libffi_cv_as_register_pseudo_op=no])
    ])
    if test "x$libffi_cv_as_register_pseudo_op" = xyes; then
       AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
	       [Define if your assembler supports .register.])
    fi
    ;;

  X86*)
    AC_CACHE_CHECK([assembler supports pc related relocs],
	libffi_cv_as_x86_pcrel, [
	libffi_cv_as_x86_pcrel=no
	echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
	if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
	    libffi_cv_as_x86_pcrel=yes
	fi
	])
    if test "x$libffi_cv_as_x86_pcrel" = xyes; then
	AC_DEFINE(HAVE_AS_X86_PCREL, 1,
		  [Define if your assembler supports PC relative relocs.])
    fi
    ;;

  S390)
    AC_CACHE_CHECK([compiler uses zarch features],
	libffi_cv_as_s390_zarch, [
	libffi_cv_as_s390_zarch=no
	echo 'void foo(void) { bar(); bar(); }' > conftest.c
	if $CC $CFLAGS -S conftest.c > /dev/null 2>&1; then
	    if grep -q brasl conftest.s; then
	        libffi_cv_as_s390_zarch=yes
	    fi
	fi
	])
    if test "x$libffi_cv_as_s390_zarch" = xyes; then
	AC_DEFINE(HAVE_AS_S390_ZARCH, 1,
		  [Define if the compiler uses zarch features.])
    fi
    ;;
esac

# On PaX enable kernels that have MPROTECT enable we can't use PROT_EXEC.
AC_ARG_ENABLE(pax_emutramp,
  [  --enable-pax_emutramp       enable pax emulated trampolines, for we can't use PROT_EXEC],
  if test "$enable_pax_emutramp" = "yes"; then
    AC_DEFINE(FFI_MMAP_EXEC_EMUTRAMP_PAX, 1,
      [Define this if you want to enable pax emulated trampolines])
  fi)

FFI_EXEC_TRAMPOLINE_TABLE=0
case "$target" in
     *arm*-apple-darwin* | aarch64-apple-darwin*)
       FFI_EXEC_TRAMPOLINE_TABLE=1
       AC_DEFINE(FFI_EXEC_TRAMPOLINE_TABLE, 1,
                 [Cannot use PROT_EXEC on this target, so, we revert to
                   alternative means])
     ;;
     *-apple-darwin1* | *-*-freebsd* | *-*-kfreebsd* | *-*-openbsd* | *-pc-solaris*)
       AC_DEFINE(FFI_MMAP_EXEC_WRIT, 1,
                 [Cannot use malloc on this target, so, we revert to
                   alternative means])
     ;;
esac
AM_CONDITIONAL(FFI_EXEC_TRAMPOLINE_TABLE, test x$FFI_EXEC_TRAMPOLINE_TABLE = x1)
AC_SUBST(FFI_EXEC_TRAMPOLINE_TABLE)

if test x$TARGET = xX86_64; then
    AC_CACHE_CHECK([toolchain supports unwind section type],
	libffi_cv_as_x86_64_unwind_section_type, [
        cat  > conftest1.s << EOF
.text
.globl foo
foo:
jmp bar
.section .eh_frame,"a",@unwind
bar:
EOF

        cat > conftest2.c  << EOF
extern void foo();
int main(){foo();}
EOF

	libffi_cv_as_x86_64_unwind_section_type=no
	# we ensure that we can compile _and_ link an assembly file containing an @unwind section
	# since the compiler can support it and not the linker (ie old binutils)
	if $CC -Wa,--fatal-warnings $CFLAGS -c conftest1.s > /dev/null 2>&1 && \
           $CC conftest2.c conftest1.o > /dev/null 2>&1 ; then
	    libffi_cv_as_x86_64_unwind_section_type=yes
	fi
	])
    if test "x$libffi_cv_as_x86_64_unwind_section_type" = xyes; then
	AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
		  [Define if your assembler supports unwind section type.])
    fi
fi

if test "x$GCC" = "xyes"; then
  AC_CACHE_CHECK([whether .eh_frame section should be read-only],
      libffi_cv_ro_eh_frame, [
  	libffi_cv_ro_eh_frame=no
  	echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
  	if $CC $CFLAGS -c -fpic -fexceptions -o conftest.o conftest.c > /dev/null 2>&1; then
	    objdump -h conftest.o > conftest.dump 2>&1
	    libffi_eh_frame_line=`grep -n eh_frame conftest.dump | cut -d: -f 1`
	    if test "x$libffi_eh_frame_line" != "x"; then
	        libffi_test_line=`expr $libffi_eh_frame_line + 1`p
	        sed -n $libffi_test_line conftest.dump > conftest.line
	        if grep READONLY conftest.line > /dev/null; then
	            libffi_cv_ro_eh_frame=yes
	        fi
	    fi
  	fi
  	rm -f conftest.*
      ])
  if test "x$libffi_cv_ro_eh_frame" = xyes; then
      AC_DEFINE(HAVE_RO_EH_FRAME, 1,
  	      [Define if .eh_frame sections should be read-only.])
      AC_DEFINE(EH_FRAME_FLAGS, "a",
  	      [Define to the flags needed for the .section .eh_frame directive.  ])
  else
      AC_DEFINE(EH_FRAME_FLAGS, "aw",
  	      [Define to the flags needed for the .section .eh_frame directive.  ])
  fi

  AC_CACHE_CHECK([for __attribute__((visibility("hidden")))],
      libffi_cv_hidden_visibility_attribute, [
  	echo 'int __attribute__ ((visibility ("hidden"))) foo (void) { return 1  ; }' > conftest.c
  	libffi_cv_hidden_visibility_attribute=no
  	if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
  	    if grep '\.hidden.*foo' conftest.s >/dev/null; then
  		libffi_cv_hidden_visibility_attribute=yes
  	    fi
  	fi
  	rm -f conftest.*
      ])
  if test $libffi_cv_hidden_visibility_attribute = yes; then
      AC_DEFINE(HAVE_HIDDEN_VISIBILITY_ATTRIBUTE, 1,
  	      [Define if __attribute__((visibility("hidden"))) is supported.])
  fi
fi

AH_BOTTOM([
#ifdef HAVE_HIDDEN_VISIBILITY_ATTRIBUTE
#ifdef LIBFFI_ASM
#define FFI_HIDDEN(name) .hidden name
#else
#define FFI_HIDDEN __attribute__ ((visibility ("hidden")))
#endif
#else
#ifdef LIBFFI_ASM
#define FFI_HIDDEN(name)
#else
#define FFI_HIDDEN
#endif
#endif
])

AC_SUBST(TARGET)
AC_SUBST(TARGETDIR)

changequote(<,>)
TARGET_OBJ=
for i in $SOURCES; do
  TARGET_OBJ="${TARGET_OBJ} src/${TARGETDIR}/"`echo $i | sed 's/[cS]$/lo/'`
done
changequote([,])
AC_SUBST(TARGET_OBJ)

AC_SUBST(SHELL)

AC_ARG_ENABLE(debug,
[  --enable-debug          debugging mode],
  if test "$enable_debug" = "yes"; then
    AC_DEFINE(FFI_DEBUG, 1, [Define this if you want extra debugging.])
  fi)
AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes")

AC_ARG_ENABLE(structs,
[  --disable-structs       omit code for struct support],
  if test "$enable_structs" = "no"; then
    AC_DEFINE(FFI_NO_STRUCTS, 1, [Define this if you do not want support for aggregate types.])
  fi)
AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes")

AC_ARG_ENABLE(raw-api,
[  --disable-raw-api       make the raw api unavailable],
  if test "$enable_raw_api" = "no"; then
    AC_DEFINE(FFI_NO_RAW_API, 1, [Define this if you do not want support for the raw API.])
  fi)

AC_ARG_ENABLE(purify-safety,
[  --enable-purify-safety  purify-safe mode],
  if test "$enable_purify_safety" = "yes"; then
    AC_DEFINE(USING_PURIFY, 1, [Define this if you are using Purify and want to suppress spurious messages.])
  fi)

if test -n "$with_cross_host" &&
   test x"$with_cross_host" != x"no"; then
  toolexecdir='$(exec_prefix)/$(target_alias)'
  toolexeclibdir='$(toolexecdir)/lib'
else
  toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
  toolexeclibdir='$(libdir)'
fi
multi_os_directory=`$CC -print-multi-os-directory`
case $multi_os_directory in
  .) ;; # Avoid trailing /.
  *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
esac
AC_SUBST(toolexecdir)
AC_SUBST(toolexeclibdir)

if test "${multilib}" = "yes"; then
  multilib_arg="--enable-multilib"
else
  multilib_arg=
fi

# Check linker support.
LIBAT_ENABLE_SYMVERS

# Determine what GCC version number to use in filesystem paths.
GCC_BASE_VER

AC_CONFIG_COMMANDS(include, [test -d include || mkdir include])
AC_CONFIG_COMMANDS(src, [
test -d src || mkdir src
test -d src/$TARGETDIR || mkdir src/$TARGETDIR
], [TARGETDIR="$TARGETDIR"])

AC_CONFIG_LINKS(include/ffitarget.h:src/$TARGETDIR/ffitarget.h)

AC_CONFIG_FILES(include/Makefile include/ffi.h Makefile testsuite/Makefile man/Makefile libffi.pc)

AC_OUTPUT
Commit	Line	Data
47c5fab6	1	dnl Process this with autoconf to create configure
b375837d	2
b375837d	3
89d8a412	4	AC_INIT([libffi], [3.99999], [http://github.com/atgreen/libffi/issues])
b375837d	5	AC_CONFIG_HEADERS([fficonfig.h])
	6
	7	AM_ENABLE_MULTILIB(, ..)
3b43a26e	8
3743c332	9	AC_CANONICAL_SYSTEM
3743c332	10	target_alias=${target_alias-$host_alias}
47c5fab6	11
2b536a17	12	AM_INIT_AUTOMAKE([no-dist])
47c5fab6	13
8cd092c9	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
b375837d	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.
89d8a412	43	# Also save and restore CFLAGS, since AC_PROG_CC will come up with
89d8a412	44	# defaults of its own if none are provided.
47c5fab6	45
b375837d	46	m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
b375837d	47	m4_define([_AC_ARG_VAR_PRECIOUS],[])
89d8a412	48	save_CFLAGS=$CFLAGS
47c5fab6	49	AC_PROG_CC
89d8a412	50	AC_PROG_CXX
	51	CFLAGS=$save_CFLAGS
	52	m4_undefine([_AC_ARG_VAR_PRECIOUS])
9abe4a66	53	m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
3743c332	54
b375837d	55	AC_SUBST(CFLAGS)
	56
	57	AM_PROG_AS
	58	AM_PROG_CC_C_O
47c5fab6	59	AC_PROG_LIBTOOL
47c5fab6	60
89d8a412	61	# Test for 64-bit build.
	62	AC_CHECK_SIZEOF([size_t])
	63
b375837d	64	AM_MAINTAINER_MODE
b375837d	65
2be99030	66	AC_CHECK_HEADERS(sys/mman.h)
89d8a412	67	AC_CHECK_FUNCS([mmap mkostemp])
e7f352cc	68	AC_FUNC_MMAP_BLACKLIST
e7f352cc	69
3743c332	70	dnl The -no-testsuite modules omit the test subdir.
	71	AM_CONDITIONAL(TESTSUBDIR, test -d $srcdir/testsuite)
	72
47c5fab6	73	TARGETDIR="unknown"
f7d6f268	74	HAVE_LONG_DOUBLE_VARIANT=0
47c5fab6	75
89d8a412	76	. ${srcdir}/configure.host
3743c332	77
89d8a412	78	if test -n "${UNSUPPORTED}"; then
b375837d	79	AC_MSG_ERROR(["libffi has not been ported to $host."])
47c5fab6	80	fi
47c5fab6	81
89d8a412	82	AC_SUBST(AM_RUNTESTFLAGS)
89d8a412	83	AC_SUBST(AM_LTLDFLAGS)
47c5fab6	84
	85	AC_HEADER_STDC
	86	AC_CHECK_FUNCS(memcpy)
	87	AC_FUNC_ALLOCA
	88
69738b31	89	AC_CHECK_SIZEOF(double)
69738b31	90	AC_CHECK_SIZEOF(long double)
ed35b400	91
3d37e05c	92	# Also AC_SUBST this variable for ffi.h.
ea4d299a	93	if test -z "$HAVE_LONG_DOUBLE"; then
ea4d299a	94	HAVE_LONG_DOUBLE=0
f7d6f268	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])
ea4d299a	98	HAVE_LONG_DOUBLE=1
f7d6f268	99	else
	100	if test $ac_cv_sizeof_double != $ac_cv_sizeof_long_double; then
	101	HAVE_LONG_DOUBLE=1
	102	AC_DEFINE(HAVE_LONG_DOUBLE, 1, [Define if you have the long double type and it is bigger than a double])
	103	fi
ea4d299a	104	fi
3d37e05c	105	fi
	106	fi
	107	AC_SUBST(HAVE_LONG_DOUBLE)
f7d6f268	108	AC_SUBST(HAVE_LONG_DOUBLE_VARIANT)
3d37e05c	109
69738b31	110	AC_C_BIGENDIAN
47c5fab6	111
022a1701	112	GCC_AS_CFI_PSEUDO_OP
a53add80	113
14c010b9	114	case "$TARGET" in
14c010b9	115	SPARC)
b40c762b	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$libffi_cv_as_sparc_ua_pcrel" = xyes; then
	128	AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
	129	[Define if your assembler and linker support unaligned PC relative relocs.])
	130	fi
f3bd7a2c	131
	132	AC_CACHE_CHECK([assembler .register pseudo-op support],
	133	libffi_cv_as_register_pseudo_op, [
	134	libffi_cv_as_register_pseudo_op=unknown
	135	# Check if we have .register
89d8a412	136	AC_TRY_COMPILE(,[asm (".register %g2, #scratch");],
b375837d	137	[libffi_cv_as_register_pseudo_op=yes],
b375837d	138	[libffi_cv_as_register_pseudo_op=no])
f3bd7a2c	139	])
	140	if test "x$libffi_cv_as_register_pseudo_op" = xyes; then
	141	AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
b375837d	142	[Define if your assembler supports .register.])
f3bd7a2c	143	fi
14c010b9	144	;;
b40c762b	145
14c010b9	146	X86*)
95ff4d7d	147	AC_CACHE_CHECK([assembler supports pc related relocs],
95ff4d7d	148	libffi_cv_as_x86_pcrel, [
89d8a412	149	libffi_cv_as_x86_pcrel=no
95ff4d7d	150	echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
89d8a412	151	if $CC $CFLAGS -c conftest.s > /dev/null 2>&1; then
89d8a412	152	libffi_cv_as_x86_pcrel=yes
95ff4d7d	153	fi
	154	])
	155	if test "x$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
14c010b9	159	;;
40ae1f19	160
14c010b9	161	S390)
89d8a412	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
14c010b9	176	;;
14c010b9	177	esac
89d8a412	178
a65f362a	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 "$enable_pax_emutramp" = "yes"; then
	183	AC_DEFINE(FFI_MMAP_EXEC_EMUTRAMP_PAX, 1,
	184	[Define this if you want to enable pax emulated trampolines])
	185	fi)
	186
	187	FFI_EXEC_TRAMPOLINE_TABLE=0
3531d81f	188	case "$target" in
14c010b9	189	arm-apple-darwin* \| aarch64-apple-darwin*)
a65f362a	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
	193	alternative means])
	194	;;
	195	-apple-darwin1 \| --freebsd* \| --kfreebsd* \| --openbsd* \| -pc-solaris)
3531d81f	196	AC_DEFINE(FFI_MMAP_EXEC_WRIT, 1,
	197	[Cannot use malloc on this target, so, we revert to
	198	alternative means])
	199	;;
	200	esac
a65f362a	201	AM_CONDITIONAL(FFI_EXEC_TRAMPOLINE_TABLE, test x$FFI_EXEC_TRAMPOLINE_TABLE = x1)
a65f362a	202	AC_SUBST(FFI_EXEC_TRAMPOLINE_TABLE)
3531d81f	203
5ed988d2	204	if test x$TARGET = xX86_64; then
89d8a412	205	AC_CACHE_CHECK([toolchain supports unwind section type],
5ed988d2	206	libffi_cv_as_x86_64_unwind_section_type, [
89d8a412	207	cat > conftest1.s << EOF
	208	.text
	209	.globl foo
	210	foo:
	211	jmp bar
	212	.section .eh_frame,"a",@unwind
	213	bar:
	214	EOF
	215
	216	cat > conftest2.c << EOF
	217	extern void foo();
	218	int main(){foo();}
	219	EOF
	220
	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	$CC conftest2.c conftest1.o > /dev/null 2>&1 ; then
	226	libffi_cv_as_x86_64_unwind_section_type=yes
5ed988d2	227	fi
	228	])
	229	if test "x$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.])
	232	fi
	233	fi
	234
a65f362a	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
89d8a412	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 $libffi_test_line conftest.dump > conftest.line
	246	if grep READONLY conftest.line > /dev/null; then
	247	libffi_cv_ro_eh_frame=yes
	248	fi
	249	fi
a65f362a	250	fi
	251	rm -f conftest.*
	252	])
	253	if test "x$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. ])
	258	else
	259	AC_DEFINE(EH_FRAME_FLAGS, "aw",
	260	[Define to the flags needed for the .section .eh_frame directive. ])
	261	fi
1da888ec	262
a65f362a	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
	270	fi
	271	fi
	272	rm -f conftest.*
	273	])
	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.])
	277	fi
33b4ca90	278	fi
	279
	280	AH_BOTTOM([
	281	#ifdef HAVE_HIDDEN_VISIBILITY_ATTRIBUTE
	282	#ifdef LIBFFI_ASM
	283	#define FFI_HIDDEN(name) .hidden name
	284	#else
	285	#define FFI_HIDDEN __attribute__ ((visibility ("hidden")))
	286	#endif
	287	#else
	288	#ifdef LIBFFI_ASM
	289	#define FFI_HIDDEN(name)
	290	#else
	291	#define FFI_HIDDEN
	292	#endif
	293	#endif
	294	])
	295
47c5fab6	296	AC_SUBST(TARGET)
	297	AC_SUBST(TARGETDIR)
	298
89d8a412	299	changequote(<,>)
	300	TARGET_OBJ=
	301	for i in $SOURCES; do
	302	TARGET_OBJ="${TARGET_OBJ} src/${TARGETDIR}/"`echo $i \| sed 's/[cS]$/lo/'`
	303	done
	304	changequote([,])
	305	AC_SUBST(TARGET_OBJ)
	306
47c5fab6	307	AC_SUBST(SHELL)
47c5fab6	308
070883fe	309	AC_ARG_ENABLE(debug,
	310	[ --enable-debug debugging mode],
	311	if test "$enable_debug" = "yes"; then
3d37e05c	312	AC_DEFINE(FFI_DEBUG, 1, [Define this if you want extra debugging.])
070883fe	313	fi)
a65f362a	314	AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes")
070883fe	315
	316	AC_ARG_ENABLE(structs,
	317	[ --disable-structs omit code for struct support],
	318	if test "$enable_structs" = "no"; then
89d8a412	319	AC_DEFINE(FFI_NO_STRUCTS, 1, [Define this if you do not want support for aggregate types.])
070883fe	320	fi)
89d8a412	321	AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes")
070883fe	322
	323	AC_ARG_ENABLE(raw-api,
	324	[ --disable-raw-api make the raw api unavailable],
	325	if test "$enable_raw_api" = "no"; then
89d8a412	326	AC_DEFINE(FFI_NO_RAW_API, 1, [Define this if you do not want support for the raw API.])
070883fe	327	fi)
47c5fab6	328
47c5fab6	329	AC_ARG_ENABLE(purify-safety,
070883fe	330	[ --enable-purify-safety purify-safe mode],
070883fe	331	if test "$enable_purify_safety" = "yes"; then
3d37e05c	332	AC_DEFINE(USING_PURIFY, 1, [Define this if you are using Purify and want to suppress spurious messages.])
070883fe	333	fi)
9573c665	334
c8d4fa8c	335	if test -n "$with_cross_host" &&
	336	test x"$with_cross_host" != x"no"; then
	337	toolexecdir='$(exec_prefix)/$(target_alias)'
	338	toolexeclibdir='$(toolexecdir)/lib'
	339	else
	340	toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
	341	toolexeclibdir='$(libdir)'
	342	fi
777bb3dc	343	multi_os_directory=`$CC -print-multi-os-directory`
	344	case $multi_os_directory in
	345	.) ;; # Avoid trailing /.
	346	*) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
	347	esac
c8d4fa8c	348	AC_SUBST(toolexecdir)
c8d4fa8c	349	AC_SUBST(toolexeclibdir)
47c5fab6	350
3b43a26e	351	if test "${multilib}" = "yes"; then
	352	multilib_arg="--enable-multilib"
	353	else
	354	multilib_arg=
	355	fi
	356
86d5c70d	357	# Check linker support.
	358	LIBAT_ENABLE_SYMVERS
	359
602de845	360	# Determine what GCC version number to use in filesystem paths.
	361	GCC_BASE_VER
	362
b375837d	363	AC_CONFIG_COMMANDS(include, [test -d include \|\| mkdir include])
b375837d	364	AC_CONFIG_COMMANDS(src, [
9461b350	365	test -d src \|\| mkdir src
b375837d	366	test -d src/$TARGETDIR \|\| mkdir src/$TARGETDIR
	367	], [TARGETDIR="$TARGETDIR"])
	368
	369	AC_CONFIG_LINKS(include/ffitarget.h:src/$TARGETDIR/ffitarget.h)
	370
89d8a412	371	AC_CONFIG_FILES(include/Makefile include/ffi.h Makefile testsuite/Makefile man/Makefile libffi.pc)
3d37e05c	372
b375837d	373	AC_OUTPUT