1 files changed, 3 insertions, 2 deletions
diff --git a/Makefile b/Makefile
index 5e50c9c..205b8c2 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,7 @@
 PREFIX=
 CFLAGS=-Wall -Wextra -pedantic -Wmissing-prototypes -Wstrict-prototypes
-OFLAGS=-O3
+G ?=
+O ?= -O3
 
 all: bpeg
 
@@ -8,6 +9,6 @@ clean:
 	rm -f bpeg
 
 bpeg: bpeg.c bpeg.h utils.h
-	cc $(CFLAGS) $(OFLAGS) $< -o $@
+	cc $(CFLAGS) $(G) $(O) $< -o $@
 
 .PHONY: all clean