Follow Techotopia on Twitter

On-line Guides
All Guides
eBook Store
iOS / Android
Linux for Beginners
Office Productivity
Linux Installation
Linux Security
Linux Utilities
Linux Virtualization
Linux Kernel
System/Network Admin
Programming
Scripting Languages
Development Tools
Web Development
GUI Toolkits/Desktop
Databases
Mail Systems
openSolaris
Eclipse Documentation
Techotopia.com
Virtuatopia.com

How To Guides
Virtualization
General System Admin
Linux Security
Linux Filesystems
Web Servers
Graphics & Desktop
PC Hardware
Windows
Problem Solutions
Privacy Policy

  




 

 

Debian GNU/Linux Reference Guide
Prev Home Next

13.7.3 Flex – a better Lex

flex is a fast lexical analyzer generator.

References for flex:

  • info flex (tutorial)

  • flex(1)

You need to provide your own main() and yywrap(), or your program.l should look like this to compile without a library (yywrap is a macro; %option main turns on %option noyywrap implicitly):

     %option main
     %%
     .|\n    ECHO ;
     %%

Alternatively, you may compile with the -lfl linker option at the end of your cc command line (like AT&T-Lex with -ll). No %option is needed in this case.


Debian GNU/Linux Reference Guide
Prev Home Next

 
 
  Published under the terms of the GNU General Public License Design by Interspire