--- a/Makefile	2016-10-21 04:28:00.000000000 +0200
+++ b/Makefile	2018-11-01 16:56:36.000000000 +0100
@@ -1,8 +1,9 @@
-CC=gcc
-CFLAGS=-W -Wall -g -O2 -s -pipe
-LDFLAGS=-lrt -lm -pthread
+CC ?= gcc
+CFLAGS+=-W -Wall
+LDFLAGS+=-lrt -lm -pthread
 
-interbench: interbench.o hackbench.o -lm
+interbench: interbench.o hackbench.o
+	$(CC) $(CFLAGS) -o interbench interbench.o hackbench.o $(LDFLAGS)
 interbench.o: interbench.c
 hackbench.o: hackbench.c