diff --git Python-2.6.4/Modules/_ctypes/callproc.c Python-2.6.4/Modules/_ctypes/callproc.c
--- Python-2.6.4/Modules/_ctypes/callproc.c
+++ Python-2.6.4/Modules/_ctypes/callproc.c
@@ -73,6 +73,8 @@
 #include <malloc.h>
 #endif
 
+#include <alloca.h>
+
 #include <ffi.h>
 #include "ctypes.h"
 
diff --git Python-2.6.4/Modules/_ctypes/libffi/src/x86/ffitarget.h Python-2.6.4/Modules/_ctypes/libffi/src/x86/ffitarget.h
--- Python-2.6.4/Modules/_ctypes/libffi/src/x86/ffitarget.h
+++ Python-2.6.4/Modules/_ctypes/libffi/src/x86/ffitarget.h
@@ -54,10 +54,10 @@
 #endif
 
   /* ---- Intel x86 and AMD x86-64 - */
-#if !defined(X86_WIN32) && (defined(__i386__) || defined(__x86_64__))
+#if !defined(X86_WIN32) && (defined(__i386__) || defined(__i386) || defined(__x86_64__))
   FFI_SYSV,
   FFI_UNIX64,   /* Unix variants all use the same ABI for x86-64  */
-#ifdef __i386__
+#if defined (__i386__) || defined (__i386)
   FFI_DEFAULT_ABI = FFI_SYSV,
 #else
   FFI_DEFAULT_ABI = FFI_UNIX64,