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Re: [vox-tech] math.h advice?
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Re: [vox-tech] math.h advice?

When you compile, use the "-lm" option.  Example:

   gcc myprog.c -o myprog -lm

Make sure "-lm" comes at the end, not at the beginning.


On Mon, 8 Jul 2002, Alexandra Thorn wrote:

> I'm working on a couple of C programs for my masters thesis, using a
> RedHat 7.2.somethingeruther machine.  I'd like to be able to use functions
> like sin, cos, and round, but gcc does not seem to be recognizing them,
> even though I've #included <math.h>.  Out of curiosity, I did a search for
> math.h, and then used grep to do a search for the patterns "cos", "round",
> etc., and came up with nothing.  So I guess it isn't too surprising that
> my code isn't compiling.  My question is: what's going on here?  Do I need
> to download another version of math.h from somewhere?  Has anyone
> encountered this sort of thing before?
> Thanks in advance,
> Alex
> "...for I am like a doctor who cannot give up smoking, or perhaps worse
> still, like an ecologist who cannot give up his car..."
>                                --Reg from Douglas Adams'
>                                  _Dirk Gently's Holistic Detective Agency_
> _______________________________________________
> vox-tech mailing list
> vox-tech@lists.lugod.org
> http://lists.lugod.org/mailman/listinfo/vox-tech

Mark K. Kim
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