diff -u apps/codecs/libmad/synth.c apps/codecs/libmad/synth.c
--- apps/codecs/libmad/synth.c  (working copy)
+++ apps/codecs/libmad/synth.c  (working copy)
@@ -1042,9 +1042,11 @@
                  mad_fixed_t const (*D0ptr)[32],
                  mad_fixed_t const (*D1ptr)[32]);

+#ifndef CPU_PP
 static
 void synth_full(struct mad_synth *synth, struct mad_frame const *frame,
                unsigned int nch, unsigned int ns) ICODE_ATTR;
+#endif
 static
 void synth_full(struct mad_synth *synth, struct mad_frame const *frame,
                unsigned int nch, unsigned int ns)