gentoo-overlay/media-sound/wavegain/files/wavegain-1.3.1-makefile.patch

--- a/Makefile
+++ b/Makefile
@@ -0,0 +1,4 @@
+LDLIBS = -lm
+CPPFLAGS += -DHAVE_CONFIG_H
+
+wavegain: audio.o dither.o gain_analysis.o getopt1.o getopt.o main.o misc.o recurse.o