Re: problems with pow( ) in gcc

[David Eduardo Gomez Noguera <davidgn@example.com>]

On Wed, 31 Jan 2001 12:30:54 +0900
Hector Akamine <akamine@example.com> was chatting the other day about l and said:


The problem is "pow" is not declared on math.h (at least it doesnt appeara on my header files either, and its redhat's glibc.
dont know if redhat screw something, or if glibc is laggin it.

pow does appear in the info pages, but it doesnt say what header it requires.

> I was trying to compile this simple program. The gcc compiler is the one
> included in Vine Linux 2.0
> 
> ------- program begin ----------
> 
> #include <stdio.h>
> #include <math.h>
> 
> int main() {
>   double maxi;
> 
>   printf("pow test:");
>   maxi = pow (2.0, 5.0 );
>   printf("%f\n",maxi);
> 
> }
> 
> ------- program end ----------
> 
> But the compiler throws the following error:
> 
> ------- begin --------
> $ gcc -o test test.c
> 
> 
> /tmp/ccfCPb5f.o: In function `main':
> /tmp/ccfCPb5f.o(.text+0x22): undefined reference to `pow'
> collect2: ld returned 1 exit status
> 
> -------- end ---------
> 
> What am I doing wrong?
> 
> 
> Thanks in advance
> 
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