Index: libffi/ChangeLog
===================================================================
--- libffi.orig/ChangeLog
+++ libffi/ChangeLog
@@ -3,6 +3,12 @@
 	* src/powerpc/linux64_closure.S: Add new ABI support.
 	* src/powerpc/linux64.S: Likewise.
 
+2012-10-30  Frederick Cheung  <frederick.cheung@gmail.com>
+
+	* configure.ac: Enable FFI_MAP_EXEC_WRIT for Darwin 12 (mountain
+	lion) and future version.
+	* configure: Rebuild.
+
 2012-10-30  James Greenhalgh  <james.greenhalgh at arm.com>
             Marcus Shawcroft  <marcus.shawcroft at arm.com>
 
Index: libffi/configure
===================================================================
--- libffi.orig/configure
+++ libffi/configure
@@ -6848,7 +6848,14 @@ s390*-*linux*|s390*-*tpf*|sparc*-*linux*
 	    LD="${LD-ld} -m elf_i386_fbsd"
 	    ;;
 	  x86_64-*linux*)
-	    LD="${LD-ld} -m elf_i386"
+	    case `/usr/bin/file conftest.o` in
+	      *x86-64*)
+	         LD="${LD-ld} -m elf32_x86_64"
+	         ;;
+	      *)
+	         LD="${LD-ld} -m elf_i386"
+	         ;;
+	    esac
 	    ;;
 	  ppc64-*linux*|powerpc64-*linux*)
 	    LD="${LD-ld} -m elf32ppclinux"
@@ -14459,7 +14466,7 @@ case "$target" in
 $as_echo "#define FFI_EXEC_TRAMPOLINE_TABLE 1" >>confdefs.h
 
      ;;
-     *-apple-darwin1[10]* | *-*-freebsd* | *-*-kfreebsd* | *-*-openbsd* | *-pc-solaris*)
+     *-apple-darwin1* | *-*-freebsd* | *-*-kfreebsd* | *-*-openbsd* | *-pc-solaris*)
 
 $as_echo "#define FFI_MMAP_EXEC_WRIT 1" >>confdefs.h
 
Index: libffi/configure.ac
===================================================================
--- libffi.orig/configure.ac
+++ libffi/configure.ac
@@ -361,7 +361,7 @@ case "$target" in
                  [Cannot use PROT_EXEC on this target, so, we revert to
                    alternative means])
      ;;
-     *-apple-darwin1[[10]]* | *-*-freebsd* | *-*-kfreebsd* | *-*-openbsd* | *-pc-solaris*)
+     *-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])