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From: Dave Andersen <angio@aros.net>
Message-Id: <199607052126.PAA23497@terra.aros.net>
Subject: Re: C libraries
To: searle@longacre.demon.co.uk (Michael Searle)
Date: Fri, 5 Jul 1996 15:26:59 -0600 (MDT)
Cc: questions@freefall.freebsd.org
In-Reply-To: <mE9178E39@longacre.demon.co.uk> from "Michael Searle" at Jul 5, 96 08:24:18 pm
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gcc <files> -lm
            ***  -- link the math library in.

Lo and behold, Michael Searle once said:
> 
> I have been having some problems getting C programs containing calls in
> math.h to link - is there a special library I have to use? I wrote a test
> program using sqrt(), but I get the same stuff for pow(), trig functions,
> etc. I am using standard gcc 2.6.3 on FreeBSD 2.1R. Here is the test
> program, the output I got from the linker, and my /usr/lib directory.
> 
> It compiles and links OK, just using 'gcc sqrt.c -o sqrt', on a different
> (not FreeBSD) system running gcc 2.4.5.
> 
> Also, one of the programs also needed Motif (the Xm library) to compile. Is
> there a free static version of the Motif library? (If so, where can I
> download it from?)
> 
> sqrt.c:
> 
> #include <math.h>
> #include <stdio.h>
> 
> int main() {
>    double x;
>    
>    fprintf(stdout,"What is your number?");
>    fscanf(stdin,"%lf",&x);
>    
>    fprintf(stdout,"The square root of %lf is %lf.",x,sqrt(x));
>    
>    exit();
>    }


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