Compiler Design Lab

Download this repository -> compiler-lab (move it to home folder)

Installing lex & yacc

$sudo apt-get update

$sudo apt-get install byacc flex

To clone

$cd ~ && git clone https://github.com/prabhakaran9397/compiler-lab/

Using Makefile

Download the makefiles from my repo

$cp ~/compiler-lab/mkl ~/.mkl; cp ~/compiler-lab/mky ~/.mky

Aliasing make command

$echo 'alias mkl="make -f ~/.mkl"' >> ~/.*shrc

$echo 'alias mky="make -f ~/.mky"' >> ~/.*shrc

$source ~/.*shrc

Compiling and Executing Lex

I've used this repository codes as example

$cd ~/compiler-lab/codes && ls

count.l hello.c

Type without .l to make the lex file

$mkl count

lex -o count.c count.l
gcc -o count count.c -ll
rm count.c

Execute it like this

$./count

hello
This is a test
:)
<press control+d>
Number of chars: 24
Number of lines: 3

To test a c program using lex

$cat hello.c | ./count

Number of chars: 77
Number of lines: 7