🆕 malloc 、printf

user/libs/libc/Makefile

@@ -2,11 +2,34 @@ all: libc
 
 CFLAGS += -I .
 
+libc_sub_dirs=math
 
-libc: unistd.o fcntl.o
+
+libc: unistd.o fcntl.o malloc.o errno.o printf.o stdlib.o ctype.o
+	@list='$(libc_sub_dirs)'; for subdir in $$list; do \
+    		echo "make all in $$subdir";\
+    		cd $$subdir;\
+    		$(MAKE) all CFLAGS="$(CFLAGS) -I $(shell pwd)";\
+    		cd ..;\
+	done
 
 unistd.o: unistd.c
 	gcc $(CFLAGS) -c unistd.c -o unistd.o
 
 fcntl.o: fcntl.c
 	gcc $(CFLAGS) -c fcntl.c -o fcntl.o
+
+malloc.o: malloc.c
+	gcc $(CFLAGS) -c malloc.c -o malloc.o
+
+errno.o: errno.c
+	gcc $(CFLAGS) -c errno.c -o errno.o
+
+printf.o: printf.c
+	gcc $(CFLAGS) -c printf.c -o printf.o
+
+stdlib.o: stdlib.c
+	gcc $(CFLAGS) -c stdlib.c -o stdlib.o
+	
+ctype.o: ctype.c
+	gcc $(CFLAGS) -c ctype.c -o ctype.o