Update Makefiles.

Makefile

+include common.mk
+
 .PHONY: all test clean
 
 all:
@@ -9,6 +11,3 @@ test:
 	${MAKE} -C src     test
 	${MAKE} -C test    test
 	${MAKE} -C example test
-
-clean:
-	${RM} -r bin obj

common.mk

@@ -5,3 +5,8 @@ BIN_DIR := ${ROOT}/bin/${CD:${ROOT}/%=%}
 OBJ_DIR := ${ROOT}/obj/${CD:${ROOT}/%=%}
 
 .PHONY: all test clean
+
+all:
+
+clean:
+	${RM} -r bin obj

example/8cc/Makefile

@@ -32,7 +32,6 @@ SRCS := \
 	8cc/vector.c
 
 .PHONY: all test clean
-.PRECIOUS: ${OBJ_DIR}/stage1-wm/%-wm.ll
 
 all: stage3 stage3-wm
 
@@ -66,14 +65,11 @@ ${OBJ_DIR}/stage3/%.o: 8cc/%.c ${BIN_DIR}/stage2/8cc.out
 	${BIN_DIR}/stage2/8cc.out -w ${8CCFLAGS} -o $@ -c $<
 
 # Watermarked 8cc
-${OBJ_DIR}/stage1-wm/%.o: ${OBJ_DIR}/stage1-wm/%-wm.ll
+${OBJ_DIR}/stage1-wm/%.o: 8cc/%.c
 	@mkdir -p ${@D}
-	clang ${CFLAGS} -o $@ -c $<
-
-${OBJ_DIR}/stage1-wm/%-wm.ll: 8cc/%.c
-	@mkdir -p ${@D}
-	clang ${CFLAGS} -S -emit-llvm -o ${@:%-wm.ll=%.ll} $<
-	opt -load=${ROOT}/bin/src/nykk.so -block-wm -watermark=${WATERMARK} -S -o $@ ${@:%-wm.ll=%.ll} 2> ${@:%-wm.ll=%-log.txt}
+	clang ${CFLAGS} -S -emit-llvm -o ${@:%.o=%.ll} $<
+	opt -load=${ROOT}/bin/src/nykk.so -block-wm -watermark=${WATERMARK} -S -o ${@:%.o=%-wm.ll} ${@:%.o=%.ll} 2> ${@:%.o=%-log.txt}
+	clang ${CFLAGS} -o $@ -c ${@:%.o=%-wm.ll}
 
 ${OBJ_DIR}/stage2-wm/%.o: 8cc/%.c ${BIN_DIR}/stage1-wm/8cc.out
 	@mkdir -p ${@D}

example/Makefile

+include ../common.mk
+
 .PHONY: all test clean
 
 all: