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PROGS=pat1 pat2
CXX=clang++
 
# Default target
all: $(PROGS) ${PROGS:=.output}
 
# Dependencies
$(PROGS:=.yy.o): %.yy.o: %.tab.hpp
$(PROGS:=.tab.o): %.o: %.hpp
$(PROGS:=.yy.o) $(PROGS:=.tab.o): parsetree.hpp
 
# Rules to generate the final compiled parser programs
$(PROGS): %: %.tab.o %.yy.o
        $(CXX) $(CPPFLAGS) $(CXXFLAGS) -o $@ $^
 
# Generic rule for compiling C++ programs from source
# (Actually, make also defines this by default.)
%.o: %.cpp
        $(CXX) $(CPPFLAGS) $(CXXFLAGS) -c $<
 
# Generic rule for running C++-style flex code generation
# For instance, this will make 'pat.yy.cpp' from 'pat.lpp'.
%.yy.cpp: %.lpp
        flex -o $@ $<
 
# Generic rule for bison code generation
%.tab.cpp %.tab.hpp: %.ypp
        bison -d $<
 
# Rule to make .output CFSM specifications from bison
%.output: %.ypp
        bison -v $<
 
.PHONY: clean all
clean:
        rm -f *.o *.yy.cpp *.tab.* $(PROGS) pat.dot pat.pdf $(PROGS:=.output)