[wplug] gcc libraries

[Weber, Lawrence A]

Thank you so much. 


>-------------------------------------------
Lawrence A. Weber
Consulting Engineer
>ANSALDO STS
>Union Switch & Signal
>1000 Technology Drive
>Pittsburgh, PA  15219-3120
>Ph: 412-688-2319
>Email:  laweber at switch.com
-------------------------------------------

-----Original Message-----
From: wplug-bounces+laweber=switch.com at wplug.org
[mailto:wplug-bounces+laweber=switch.com at wplug.org] On Behalf Of Mathieu
Dube
Sent: Wednesday, March 12, 2008 9:39 AM
To: General user list
Subject: Re: [wplug] gcc libraries

On Wed, Mar 12, 2008 at 09:32:31AM -0400, Weber, Lawrence A wrote:
> I have several PC's running Fedora Core 6 or 8.  All gcc compilers are
as originally installed during the Linux installation.
> 
> When I compile programs using gcc libraries such as <math.h> I get
"undefined reference" errors for each library function called.
> 
> It appears as if the include files are found but the linker is not
able to find the libraries.
> 
> I have used the compiler to build and install other applications
without any problems.  I did not have to adjust the search directories
on other Linux installations, any idea what I am doing wrong?

you need to link with -lm

eg:

gcc -o test -lm test.c

-M
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