math.h

math.h

[sofia takayama]

#include <stdio.h>
#include <math.h>
int main()
{
   printf("cos(1)= %f \n", cos(1));
}

After compile:

undefined reference to "cos"

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Re: math.h

[Andrew Pinski]

On Jul 31, 2005, at 1:35 PM, sofia takayama wrote:

> #include <stdio.h>
> #include <math.h>
> int main()
> {
>   printf("cos(1)= %f \n", cos(1));
> }
>
> After compile:
>
> undefined reference to "cos"


Link with -lm.

-- Pinski

Re: math.h

[Martin v. Loewis]

> when i try to use any function from math.h pow, sin, cos, etc, i get the
> following message:  /tmp/cc5Ig4Rz.o: In function `main':
> /tmp/cc5Ig4Rz.o(.text+0x15): undefined reference to `sinl'

You need to link with -lm.

Martin
>From pfeifer@dbai.tuwien.ac.at Mon Mar 06 15:29:00 2000
From: Gerald Pfeifer <pfeifer@dbai.tuwien.ac.at>
To: Nathan Sidwell <nathan@codesourcery.com>
Cc: gcc-bugs@gcc.gnu.org
Subject: Re: (C++) Incorrect new warning?
Date: Mon, 06 Mar 2000 15:29:00 -0000
Message-id: <Pine.BSF.4.21.0003070027330.13245-100000@deneb.dbai.tuwien.ac.at>
References: <38C3D2E3.A919D35C@codesourcery.com>
X-SW-Source: 2000-03/msg00290.html
Content-length: 420

On Mon, 6 Mar 2000, Nathan Sidwell wrote:
> I've committed the attached obvious fix, and testcase so this can never
> happen again (TM).

Thanks for the fix and the terrific turn-around time, once again! :-)

Gerald

PS: I verified that also the bigger project I extracted my example from
now compiles without any superflous warnings.
-- 
Gerald "Jerry" pfeifer@dbai.tuwien.ac.at http://www.dbai.tuwien.ac.at/~pfeifer/

math.h

[celio]

please send me the answer to:

gmontes@utp.edu.co or celio@linux.utp.edu.co


On Mon, 6 Mar 2000 celio@hades.utp.edu.co wrote:

> when i try to use any function from math.h pow, sin, cos, etc, i get the
> following message:  /tmp/cc5Ig4Rz.o: In function `main':
> /tmp/cc5Ig4Rz.o(.text+0x15): undefined reference to `sinl'
> /tmp/cc5Ig4Rz.o(.text+0x59): undefined reference to `csinl'
> /tmp/cc5Ig4Rz.o(.text+0x8e): undefined reference to `sin'
> /tmp/cc5Ig4Rz.o(.text+0xd1): undefined reference to `csin'
> /tmp/cc5Ig4Rz.o(.text+0x102): undefined reference to `sinf'
> /tmp/cc5Ig4Rz.o(.text+0x141): undefined reference to `csinf' collect2: ld
> returned 1 exit status when i use "tgmath.h" or the following if i use
> math.h:
> /tmp/ccLaU4pw.o: In function `main': /tmp/ccLaU4pw.o(.text+0xb):
> undefined reference to `sin'
> collect2: ld returned 1 exit status                                             
> 
> the source code is: 
> #include <math.h> #include <stdio.h>
>  
> int main() {
>   printf("%lf\n", sin(1));
>   return 0;
> }                                                                               
> 
>