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To: cs551@merlot.usc.edu
Subject: Re: csci-551
Date: Wed, 17 Sep 2008 11:45:34 -0700
From: Bill Cheng <william@bourbon.usc.edu>

Someone wrote:

  > When i try to use natural log (log(x)) in my program.It gives me the
  > following error.I have included math.h header file
  > 
  > Undefined                       first referenced
  >  symbol                             in file
  > log                                 /var/tmp//cc6RPxJT.o
  > ld: fatal: Symbol referencing errors. No output written to pthread
  > collect2: ld returned 1 exit status

I think you need "-lm" when you link.
--
Bill Cheng // bill.cheng@usc.edu <URL:http://merlot.usc.edu/william/usc/>