Problem compiling with gcc.

[Sam Varshavchik]

Robert Cahn writes:

> All was well until I needed to use the pow function.  I used 
> #include <math.h>
> as in the past but when I link I get
> 
> calculate.o(.text+0x14bf): In function `cgiMain':
> calculate.c: undefined reference to `pow'
>  
> when I look at math.h there is no reference to pow.

math.h includes bits/mathcall.h, which defines pow().

Add the -lm flag to your link command.

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