# Public domain
# Tested with Bison) 3.2.2 and Flex 2.6.4
# Note that our scanner.ll contains C++ code fragments, but we run Flex in C mode anyway. I. e. we pass C++ code to Flex, but trick it to think it processes C code. Then Flex generates code, which (at its optinion) is C code, but in fact this is C++ code (because it contains unmodified C++ code fragments, written by us), so we write it to file with .cc extension and pass to C++ compiler
 
all: a.out
 
lex.yy.cc lex.yy.hh: scanner.ll
	flex --header-file=lex.yy.hh -o lex.yy.cc scanner.ll
 
parser.tab.cc parser.tab.hh: parser.yy
	bison -do parser.tab.cc parser.yy
 
a.out: lex.yy.cc parser.tab.cc
	c++ lex.yy.cc parser.tab.cc
 
clean:
	rm -f lex.yy.* parser.tab.* stack.hh a.out