Index: Makefile
--- Makefile.orig
+++ Makefile
@@ -43,6 +43,7 @@ CPPFLAGS += -DVERSION=\"$(VERSION)\"
 
 # Enable this for multithreading.
 CFLAGS += -pthread
+LDFLAGS += -pthread
 CPPFLAGS += -DTHREADS
 
 # Optimizing for speed. Un-comment for testing Linux build