Thread View: gnu.gcc.bug
1 messages
1 total messages
Started by Philip Goisman
Wed, 27 Nov 1996 00:00
Re: trouble compiling
Author: Philip Goisman
Date: Wed, 27 Nov 1996 00:00
Date: Wed, 27 Nov 1996 00:00
21 lines
1017 bytes
1017 bytes
>Hello... I recently started using the GCC C compiler on my Linux box, and
>am having some trouble. I'm trying to use the atan (arc tangent)
>function (in math.h), but when I compile my code, the linker (I think)
>tells me:
>/tmp/cca006221.o(.text+0x20): undefined reference to `atan'
>my (test) source code consists of the following:
>#include <stdio.h>
>#include <math.h>
>void main()
>{
> printf("%f\n",atan(5));
>}
I compiled with gcc -Wall testP.c -lm
and got 1.373401. You probably forget the -lm.
Philip
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