README.md

Book

• book: lex & yacc, 2nd
• src: lex yacc, 2nd

Contents

1. lex & yacc
   • grammar
2. lex
   • regex
   • wordcount
   • command line
   • c analyzer

Clone the Source Code

git clone https://resources.oreilly.com/examples/9781565920002.git
mv 9781565920002 lexyacc
cd lexyacc

Build a File

flex ch1-01.l
mv lex.yy.c ch1-01.c
gcc -g -o ch1-01.pgm ch1-01.c -lfl -ll

Run the File

./ch1-01.pgm

hello
hello
bye
bye
^D

Build the Project

Change -ly -ll to -lfl -ll in the Makefile:

# make and run all the example programs for lex & yacc, Second Edition
CC = gcc -g
# LIBS = -ly -ll
LIBS = -lfl -ll
LEX = flex
YACC = yacc
CFLAGS = -DYYDEBUG=1

Build:

make