--- ffmpeg-0.4.9-p20060530-static/libavcodec/i386/mmx.h	2006-08-07 23:38:20.000000000 +0200
+++ ffmpeg-0.4.9-p20060530-shared/libavcodec/i386/mmx.h	2006-08-07 23:40:40.000000000 +0200
@@ -15,7 +15,11 @@
 #  define PTR_SIZE "8"
 #else
 #  define REG_a "eax"
+# ifdef PIC
+#  define REG_b "ebp"
+# else
 #  define REG_b "ebx"
+# endif
 #  define REG_c "ecx"
 #  define REG_d "edx"
 #  define REG_D "edi"