Index: Makefile.com
===================================================================
--- Makefile.com.orig
+++ Makefile.com
@@ -107,7 +107,7 @@ tattle:		../tattle.c	libmicro.a
 	echo "char compiler_version[] = \""`$(COMPILER_VERSION_CMD)`"\";" > tattle.h
 	echo "char CC[] = \""$(CC)"\";" >> tattle.h
 	echo "char extra_compiler_flags[] = \""$(extra_CFLAGS)"\";" >> tattle.h
-	$(CC) -o tattle $(CFLAGS) -I. ../tattle.c libmicro.a -lrt -lm
+	$(CC) -o tattle $(CFLAGS) -I. ../tattle.c libmicro.a -lrt -lm -lpthread
 
 $(ELIDED_BENCHMARKS):	../elided.c
 	$(CC) -o $(@) ../elided.c