Help with sqrt() and #include <math.h> and what -l???

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To: gcc-help@xxxxxxxxxxx
Subject: Help with sqrt() and #include <math.h> and what -l???
From: Ron Hudson <ron.hudson@xxxxxxxxxxxxx>
Date: Fri, 25 Feb 2005 18:16:12 -0800
Sender: gcc-help-owner@xxxxxxxxxxx

I want to use sqrt() in my C program, everything compiles but the linker
can't find sqrt()

/tmp/ccUBZv3v.o(.text+0xe36): undefined reference to 'sqrt'

I believe i need a -l<some library> in my makefile but I don't know
how to find out what <some library> is...

ron.

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