Make a chess demo

Makefile

@@ -7,7 +7,7 @@ else
     UNAME_S := $(shell uname -s)
     ifeq ($(UNAME_S),Linux)
         EXT =
-		CFLAGS = -ggdb -I3p/glad/include -fsanitize=address,undefined
+		CFLAGS = -ggdb -I3p/glad/include #-fsanitize=address,undefined
 		LDFLAGS = -lglfw -lm
     endif
     ifeq ($(UNAME_S),Darwin)
@@ -23,7 +23,7 @@ test_vector$(EXT): Makefile src/test_vector.cpp src/vector.c
 	g++ src/test_vector.cpp src/vector.c -o $@ -I3p/glm
 
 pbrex$(EXT): Makefile $(wildcard src/*.c src/*.h)
-	gcc -o $@ src/main.c src/camera.c src/mesh.c src/vector.c src/graphics.c 3p/glad/src/glad.c -std=c11 $(CFLAGS) $(LDFLAGS)
+	gcc -o $@ src/main.c src/utils.c src/camera.c src/mesh.c src/vector.c src/graphics.c 3p/glad/src/glad.c -std=c11 $(CFLAGS) $(LDFLAGS)
 
 clean:
 	rm pbrex pbrex.exe