Update sk1/Makefile

sk1/Makefile

@@ -1,17 +1,16 @@
 CC = gcc
-CFLAGS = -Wall -Wextra -std=c11
-SRC = compressor.c
-OBJ = $(SRC:.c=.o)
-TARGET = compressor
+CFLAGS = -Wall -Wextra -std=c99
 
-all: $(TARGET)
+all: compressor
 
-$(TARGET): $(OBJ)
-	$(CC) $(CFLAGS) -o $@ $(OBJ)
+compressor: main.o compressor.o
+  $(CC) $(CFLAGS) -o compressor main.o compressor.o
 
-%.o: %.c
-	$(CC) $(CFLAGS) -c $< -o $@
+main.o: main.c compressor.h
+  $(CC) $(CFLAGS) -c main.c
+
+compressor.o: compressor.c compressor.h
+  $(CC) $(CFLAGS) -c compressor.c
 
 clean:
-	rm -f $(OBJ) $(TARGET)
-
+  rm -f *.o compressor