Patch #1536908: Add support for AMD64 / OpenBSD.

Remove the -no-stack-protector compiler flag for OpenBSD
as it has been reported to be unneeded.

Modules/_ctypes/libffi/configure

@@ -3470,6 +3470,7 @@ fi
 
 TARGETDIR="unknown"
 case "$host" in
+x86_64-*-openbsd*) TARGET=X86_64; TARGETDIR=x86;;
 mips*-*-openbsd*) TARGET=MIPS; TARGETDIR=mips;;
 sparc-*-openbsd*) TARGET=SPARC; TARGETDIR=sparc;;
 sparc64-*-openbsd*) TARGET=SPARC; TARGETDIR=sparc;;

Modules/_ctypes/libffi/configure.ac

@@ -21,6 +21,7 @@ AC_FUNC_MMAP_BLACKLIST
 
 TARGETDIR="unknown"
 case "$host" in
+x86_64-*-openbsd*) TARGET=X86_64; TARGETDIR=x86;;
 mips*-*-openbsd*) TARGET=MIPS; TARGETDIR=mips;;
 sparc-*-openbsd*) TARGET=SPARC; TARGETDIR=sparc;;
 sparc64-*-openbsd*) TARGET=SPARC; TARGETDIR=sparc;;

Modules/_ctypes/libffi/fficonfig.py.in

@@ -43,6 +43,3 @@ ffi_sources += ffi_platforms['@MKTARGET@']
 ffi_sources = [os.path.join('@srcdir@', f) for f in ffi_sources]
 
 ffi_cflags = '@CFLAGS@'
-# I think this may no longer be needed:
-if sys.platform == "openbsd3":
-    ffi_cflags += " -fno-stack-protector"