Backport from the libffi trunk:

doko42 · doko42 · commit d72ca858a6f5 · 2010-03-15T00:36:18.000Z
2010-02-15  Matthias Klose  &lt;doko@ubuntu.com&gt;

        * src/arm/sysv.S (__ARM_ARCH__): Define for processor
        __ARM_ARCH_7EM__.
diff --git a/Modules/_ctypes/libffi/src/arm/sysv.S b/Modules/_ctypes/libffi/src/arm/sysv.S
@@ -74,7 +74,8 @@
 #endif
 
 #if defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) \
-        || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__)
+        || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) \
+	|| defined(__ARM_ARCH_7EM__)
 # undef __ARM_ARCH__
 # define __ARM_ARCH__ 7
 #endif
