fixed some style issues.

makefile

@@ -0,0 +1,18 @@
+.POSIX:
+
+# Compiler and archiver definitions
+CC      = cc
+AR      = ar
+CFLAGS  = -O2 -I./source_code
+
+# Targets
+all: liblog.a
+
+source_code/log.o: source_code/log.c source_code/log.h
+	$(CC) $(CFLAGS) -c source_code/log.c -o source_code/log.o
+
+liblog.a: source_code/log.o
+	$(AR) -rc liblog.a source_code/log.o
+
+clean:
+	rm -f source_code/log.o liblog.a