Is there a parameter called _DEBUG?

Lin George
Tue Aug 29 13:20:00 GMT 2006

Hello everyone,

I am learning some samples on how to write Makefile. I
noticed that some samples use a parameter called
"_DEBUG" when making the debug version build.

like gcc -D_DEBUG

But I can not find a parameter called "_DEBUG" from
gcc manual. I think it must be some application
self-defined material. Since I am a newbie, and I am
not quite sure.

So, anyone has any comments?

thanks in advance,

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