Problem using math library

Problem using math library

[Tom Tran]

Hi,
I have problem using function in math.h.  gcc gives undefined reference
Here is a sample of my tstpow.c program:

#include <math.h>

int main()
{
   double d;

   d = pow(2.0, 3.0);
  return 0;
}

I compiled the program with:
    gcc tstpow.c

gcc gave this error:
   undefined reference pow

I tried other functions s.a. sqrt(), sin(), etc.  Same problem.
Other header files (s.a. <stdio.h> <string.h> <stdlib.h> work fine.

Please help.

Tom Tran
tom.tran@noaa.gov

Re: Problem using math library

[bjorn rohde jensen]

Hi there,

  The math library is not linked against by default, add -lm
at link time to include the math library in link.

Yours sincerely,

Bjorn

Re: Problem using math library

[Bharathi S]

On Wed, 17 Dec 2003, Tom Tran wrote:

> gcc gave this error: undefined reference pow

> I tried other functions s.a. sqrt(), sin(), etc.  Same problem.
> Other header files (s.a. <stdio.h> <string.h> <stdlib.h> work fine.

Math library will not be linked by default. Link it by -lm option.

gcc myprg.c -lm

Bye :)
-- 
Bharathi S, IndLinuX Team,   (__)
DON Lab,    TeNeT Group,     oo )
IIT-Madras, Chennai-INDIA.   (_/\ 

Known is drop, Unknown is OCEAN.

Bootstrap compiler IRIX 6.2

[Ananda Bhattacharya]

	Hi Y'all, 
	
	I have run into a lil problem. I need to compile gcc 
on an IRIX 6.2 ( yes I have one of those ) and I don't have 
a compiler on that machine. So I was wondering if anyone has 
a bootstrap gcc for IRIX 6.2 it would be great. Otherwise 
you can point me in the direction that would be great.
thanks 
&
Happy Holidays
	Anand