first commit

03_day/MAKE/SRC5/file.log

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+sflsjflsjf s
+sdlkfjslkfjs
+'f

03_day/MAKE/SRC5/foo.c

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+// foo.c
+#include <stdio.h>
+#include <foo.h>
+
+void foo()
+{
+	printf("foo : %d\n", FOO);
+}

03_day/MAKE/SRC5/foo.h

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+// foo.h
+
+#define FOO 100
+
+void foo();

03_day/MAKE/SRC5/goo.c

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+// goo.c
+#include <stdio.h>
+#include <goo.h>
+
+void goo()
+{
+	printf("goo : %d\n", GOO);
+}

03_day/MAKE/SRC5/goo.h

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+// goo.h
+
+#define GOO 200
+
+void goo();

03_day/MAKE/SRC5/main.c

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+// main.c
+#include <stdio.h>
+#include <foo.h>
+#include <goo.h>
+
+int main()
+{
+	foo();
+	goo();
+	return 0;
+}

03_day/MAKE/SRC5/makefile1

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+# makefile 1
+
+# make  로 실행하면 아무것도 안됨을 설명
+# make foo  로 실행할것
+
+# for each  xxxxx.o target there must be a xxxxx.c dependency to build.
+
+.c.o:	
+	cc -c $< -I.
+
+	

03_day/MAKE/SRC5/makefile2

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+# makefile2
+
+# .c.o 뿐 아니라 모든 파일 확장자가 가능함을 설명
+
+#.SUFFIXES: .txt .log
+
+.txt.log:	
+	@echo "Converting " $< " to " $*.log
+	mv $< $*.log
+	

03_day/MAKE/SRC5/makefile3

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+# makefile3
+
+# 아래 코드를 사용해 보고
+# 문제점은 각 헤더에 dependecy 임을 이야기 하고
+# makefile4를 수업.
+
+.c.o: 
+	@echo "Compiling" $< "..."
+	cc -c $< -I.
+
+app: main.o foo.o goo.o
+	@echo "Building target" $@ "..." 
+	cc -o app main.o foo.o goo.o
+
+#problem dependency

03_day/MAKE/SRC5/makefile4

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+# makefile4
+
+.c.o: 
+	@echo "Compiling" $< "..."
+	cc -c $< -I.
+
+app: main.o foo.o goo.o
+	@echo "Building target" $@ "..." 
+	cc -o app main.o foo.o goo.o
+
+main.o:foo.h goo.h
+foo.o:foo.h
+foo.o:goo.h