Re: Simple c program won't compile

[Erdmut Pfeifer]

On Tue, Mar 06, 2001 at 12:26:30AM +1030, 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

you have to link it with the math lib:

gcc thick.c -lm
             ^^
Cheers,
Erdmut


-- 
Erdmut Pfeifer
science+computing gmbh

-- Bugs come in through open windows. Keep Windows shut! --