Re: g++ -D compiler options
- From: Roger Leigh <rleigh@xxxxxxxxxxxxxxxxxxxx>
- Date: Thu, 27 Mar 2008 23:24:40 +0000
Daniel Franklin <daniel@xxxxxxxxxxxxxxxxxxxxx> writes:
Mark Hobley wrote:
What are the effects of the -D options?
-Ddebian
[...]
These effectivly insert #defines in the preprocessor stage. Hence if you
compile with -Ddebian, and in your code you have
#ifdef debian
some code
#else
some other code
#endif
The -Ddebian is equivalent to inserting a line which says
#define debian
at the top of the C file you're currently compiling.
Possibly worth mentioning for the OP that anyone who actually used
-Ddebian
or
#ifdef debian
in their code deserves a slap. Anything that builds on Debian should
be portable to any other GNU or POSIX platform, and so Debian-specific
code is never a good idea.
Regards,
Roger
--
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