Re: This rcsId variable in GDL2

[Pascal Bourguignon]

Markus Hitter writes:
> 
> Am Mittwoch, 01.01.03 um 17:17 Uhr schrieb Pascal Bourguignon:
> 
> >>> | //static char rcsId[] = "$Id: EODatabaseContext.m,v 1.9 2002/12/29
> >>> | 15:13:05 mirko Exp $";
> >>> |
> >>> | Gcc complains a lot about this unused variable ...
> >>
> >> No code use it. I think you can comment it.
> >
> > Yes some code use it: the 'what' command!
> >
> > When I use this syntax (with -Wall):
> >
> >     static const char rcsid[]="$Id: MTDictionary.m,v 1.11 2002/04/22 
> > 01:10:56 mppjb Exp $";
> >
> > there's no  warning, and the literal  is included in  the object files
> > and collected into the executable.
> 
> Indeed, the additional "const" makes the compiler quiet.
> 
> > As soon as you use CVS (or  old RCS or SCCS) such a 'what' command ...
> 
> *grin* what a ...
> 
> Are there additional requirements for this to work? Like variable name, 
> type etc? Or is it more like a "grep -a '$Id:' <binary>"?

The original  sccs what  command was specific  to sccs, but  IIRC, was
basically a  string|grep of the  sccs identity string  pattern "@(#)".
The variable name does not matter,  this works on a stripped binary as
well.

http://www.utexas.edu/cc/unix/OurSCCS.html
http://compute.cnr.berkeley.edu/cgi-bin/man-cgi?what+1


-- 
__Pascal_Bourguignon__                   http://www.informatimago.com/
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