Re: D_GNU_SOURCE option for gcc?

[stephen parkinson <stephen@zmemw16.demon.co.uk>]

Martin Dickopp wrote:

> stephen parkinson <stephen@zmemw16.demon.co.uk> writes:
>
>  
>
> > Thomas H. George wrote:
> >
> >    
> >
> > > I am using source code from UNIX SYSTEMS PROGRAMMING by Robbins &
> > > Robbins.  It gives a compiler error unless compiled with the option
> > > -D_GNU_SOURCE .
> > > Where does this option come from - its not in the man pages?  Why is
> > > it needed when using the Debian gcc and g++ packages?
> > >      
> > 30sec google search suggests it should perhaps be
> >
> > -DGNU_SOURCE
> >    
>
> Care to elaborate? A Google search for GNU_SOURCE turns up 1,680 hits
> for me, while _GNU_SOURCE is found 17,200 times.
>
> Martin
>
>
>  
looked down first 2 pages
picked a few showing indications of a problem
followed a couple
follwed an answer in a news group archive
and i'm about to throw the 19yrs old cat across the room if she
don't stop nuzzling the keyboard
i suspect i should have asked for o/p of 'gcc --version'

stephen