Question

JFLAGS = -d bin -cp lib/slick.jar:lib/lwjgl.jar

JC = javac

.SUFFIXES: .java .class

.java.class: $(JC) $(JFLAGS) src/$*.java

CLASSES = \
          Game.java \
          Block.java \
          BlockMap.java \

default: classes

classes: $(CLASSES:.java=.class)

clean: $(RM) bin/*.class

My source files are in src/ and I want to the compiled files to be in bin/ . When I run make, it gives me this error

makefile:7: *** multiple target patterns.  Stop.

Answer 1

The problem is here:

.java.class: $(JC) $(JFLAGS) src/$*.java

and here:

clean: $(RM) bin/*.class

These are no rules but commands. And commands must be on its own lines with a tab at the beginning of the line.

.java.class: 
    $(JC) $(JFLAGS) src/$*.java

clean: 
    $(RM) bin/*.class

Not that this are all problems with Makefiles and Java in general and this Makefile in particular.