このMakefileを使用してJavaコードをコンパイルしようとしています。ただし、makeを実行すると、コードが複数回コンパイルされます。
Makefile:
.PHONY: all clean run
SOURCES = \
Models/CustomException \
Models/Forest \
Models/ForestContainer \
Models/Owner \
Models/OwnerContainer \
Models/Tree
SRC = $(addprefix src/, $(addsuffix .java, $(SOURCES)))
BIN = $(addprefix bin/, $(addsuffix .class, $(SOURCES)))
all: ${BIN}
clean:
-rm -f ${BIN};
${BIN}: ${SRC}
mkdir -p bin/Controllers;
mkdir -p bin/Models;
mkdir -p bin/Views;
javac -d bin ${SRC};
run: all
java -cp bin Program;
出力:
┌─( klim ) - ( ~/workspace/Forest-mvc )
└─> make
mkdir -p bin/Controllers;
mkdir -p bin/Models;
mkdir -p bin/Views;
javac -d bin src/Models/CustomException.java src/Models/Forest.java src/Models/ForestContainer.java src/Models/Owner.java src/Models/OwnerContainer.java src/Models/Tree.java;
mkdir -p bin/Controllers;
mkdir -p bin/Models;
mkdir -p bin/Views;
javac -d bin src/Models/CustomException.java src/Models/Forest.java src/Models/ForestContainer.java src/Models/Owner.java src/Models/OwnerContainer.java src/Models/Tree.java;
mkdir -p bin/Controllers;
mkdir -p bin/Models;
mkdir -p bin/Views;
javac -d bin src/Models/CustomException.java src/Models/Forest.java src/Models/ForestContainer.java src/Models/Owner.java src/Models/OwnerContainer.java src/Models/Tree.java;
mkdir -p bin/Controllers;
mkdir -p bin/Models;
mkdir -p bin/Views;
javac -d bin src/Models/CustomException.java src/Models/Forest.java src/Models/ForestContainer.java src/Models/Owner.java src/Models/OwnerContainer.java src/Models/Tree.java;
mkdir -p bin/Controllers;
mkdir -p bin/Models;
mkdir -p bin/Views;
javac -d bin src/Models/CustomException.java src/Models/Forest.java src/Models/ForestContainer.java src/Models/Owner.java src/Models/OwnerContainer.java src/Models/Tree.java;
mkdir -p bin/Controllers;
mkdir -p bin/Models;
mkdir -p bin/Views;
javac -d bin src/Models/CustomException.java src/Models/Forest.java src/Models/ForestContainer.java src/Models/Owner.java src/Models/OwnerContainer.java src/Models/Tree.java;
ご覧のとおり、コマンドは複数回、実際には6回実行されます。SOURCEの数が追加/削除されると、コマンドを実行する回数が増加/減少します。
どうすればいいの?