Mark Phillips wrote:
>Hi,
>
>The following program:
>
>
>#include <stdio.h>
>#include <math.h>
>
>int main(int argv, char **argc){
> double x;
>
> x=sqrt(5.0);
>}
>
>
>does not compile. Instead I get the errors:
>
>$ gcc thick.c
>/tmp/ccU9fgSr.o: In function `main':
>/tmp/ccU9fgSr.o(.text+0x16): undefined reference to `sqrt'
>collect2: ld returned 1 exit status
>
>
>What is wrong?
Your problem is in the link stage. sqrt() is part of the maths library and
so you need to add -lm to your compilation options.
--
Oliver Elphick [EMAIL PROTECTED]
Isle of Wight http://www.lfix.co.uk/oliver
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