Index: src/attributes.h
--- src/attributes.h.orig
+++ src/attributes.h
@@ -68,7 +68,7 @@
 #define attribute_inline __inline__
 
 #if GNUC_MINIMUM(2,7) /* doesn't work reliable before, IIRC */
-# define attribute_regparm(x) __attribute__((__regparm__((x))))
+# define attribute_regparm(x) /* nothing */
 #else
 # define attribute_regparm(x)
 #endif