--- mysql/include/my_context.h.orig	2013-06-27 10:57:01.572038008 +0200
+++ mysql/include/my_context.h	2013-06-27 10:59:12.543373778 +0200
@@ -27,6 +27,8 @@
 
 #ifdef __WIN__
 #define MY_CONTEXT_USE_WIN32_FIBERS 1
+#elif defined(__GNUC__) && __GNUC__ >= 3 && defined(__x86_64__) && defined(__ILP32__)
+#define MY_CONTEXT_USE_UCONTEXT
 #elif defined(__GNUC__) && __GNUC__ >= 3 && defined(__x86_64__)
 #define MY_CONTEXT_USE_X86_64_GCC_ASM
 #elif defined(__GNUC__) && __GNUC__ >= 3 && defined(__i386__)