gistfile1.txt

$ make
javac -g -cp src @<(find src -name "*.java")
/bin/sh: 1: Syntax error: "(" unexpected
make: *** [Makefile:12: default] Error 2

Makefile

# The Java compiler
COMPILER = javac

# Directories that contain .class files for inclusion
CLASSPATH = src

# -g: Generates all debugging information, including local variables.  By
#     default, only line number and source file information is generated.
FLAGS = -g -cp $(CLASSPATH)

default:
	$(COMPILER) $(FLAGS) @<(find src -name "*.java")

clean:
	find . -name "*.class" -exec rm -f {} \;