GUN m4 的魅力

http://www.seindal.dk/rene/gnu/whatis.htm

 

GNU  m4   is a macro processor, The m4 macro processor is widely available on all UNIXes. Usually, only a small percentage of users are aware of its existence. However, those who do often become commited users.

 

Some people found m4 to be fairly addictive. They first use m4 for simple problems, then take bigger and bigger challenges, learning how to write complex m4 sets of macros along the way. Once really addicted, users pursue writing of sophisticated m4 applications even to solve simple problems, devoting more time debugging their m4 scripts than doing real work. Beware that m4 may be dangerous for the health of compulsive programmers.