+if test x$TARGET = xX86 || test x$TARGET = xX86_WIN32 || test x$TARGET = xX86_64; then
+ AC_CACHE_CHECK([assembler supports pc related relocs],
+ libffi_cv_as_x86_pcrel, [
+ libffi_cv_as_x86_pcrel=yes
+ echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
+ if $CC $CFLAGS -c conftest.s 2>&1 | $EGREP -i 'illegal|warning' > /dev/null; then
+ libffi_cv_as_x86_pcrel=no
+ fi
+ ])
+ if test "x$libffi_cv_as_x86_pcrel" = xyes; then
+ AC_DEFINE(HAVE_AS_X86_PCREL, 1,
+ [Define if your assembler supports PC relative relocs.])
+ fi
+
+ AC_CACHE_CHECK([assembler .ascii pseudo-op support],
+ libffi_cv_as_ascii_pseudo_op, [
+ libffi_cv_as_ascii_pseudo_op=unknown
+ # Check if we have .ascii
+ AC_TRY_COMPILE([asm (".ascii \"string\"");],,
+ [libffi_cv_as_ascii_pseudo_op=yes],
+ [libffi_cv_as_ascii_pseudo_op=no])
+ ])
+ if test "x$libffi_cv_as_ascii_pseudo_op" = xyes; then
+ AC_DEFINE(HAVE_AS_ASCII_PSEUDO_OP, 1,
+ [Define if your assembler supports .ascii.])
+ fi
+
+ AC_CACHE_CHECK([assembler .string pseudo-op support],
+ libffi_cv_as_string_pseudo_op, [
+ libffi_cv_as_string_pseudo_op=unknown
+ # Check if we have .string
+ AC_TRY_COMPILE([asm (".string \"string\"");],,
+ [libffi_cv_as_string_pseudo_op=yes],
+ [libffi_cv_as_string_pseudo_op=no])
+ ])
+ if test "x$libffi_cv_as_string_pseudo_op" = xyes; then
+ AC_DEFINE(HAVE_AS_STRING_PSEUDO_OP, 1,
+ [Define if your assembler supports .string.])
+ fi
+fi
+
+case "$target" in
+ *-apple-darwin10* | *-*-freebsd* | *-*-openbsd* | *-pc-solaris*)
+ AC_DEFINE(FFI_MMAP_EXEC_WRIT, 1,
+ [Cannot use malloc on this target, so, we revert to
+ alternative means])
+ ;;
+esac
+
+if test x$TARGET = xX86_64; then
+ AC_CACHE_CHECK([assembler supports unwind section type],
+ libffi_cv_as_x86_64_unwind_section_type, [
+ libffi_cv_as_x86_64_unwind_section_type=yes
+ echo '.section .eh_frame,"a",@unwind' > conftest.s
+ if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
+ libffi_cv_as_x86_64_unwind_section_type=no
+ fi
+ ])
+ if test "x$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
+