Re: This rcsId variable in GDL2

[Pascal Bourguignon]

Manuel Guesdon writes:
> Hi,
> 
> On Mon, 30 Dec 2002 17:48:36 +0100 Markus Hitter <mah@jump-ing.de> wrote:
>  >| all of the GDL2 source files define a global variable like:
>  >| 
>  >| static char rcsId[] = "$Id: EODatabaseContext.m,v 1.9 2002/12/29 
>  >| 15:13:05 mirko Exp $";
>  >| 
>  >| Is this one really necessary or could it be commented out if not used? 
>  >| Like:
>  >| 
>  >| //static char rcsId[] = "$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.


As soon as you use CVS (or  old RCS or SCCS) such a 'what' command and
this inclusion of the version  identifying string for each source file
is useful and interesting, because it helps you track the version from
the executables.  Of course, in the case of dynamic library, what must
be applied to the dynamic  library too.  Unfortunately, in the version
of GNUstep I currently have, there is no such $Id:...$ strings.


[pascal@thalassa maptree]$ what 
MapTreeTest.app/ix86/linux-gnu/gnu-gnu-gnu/MapTreeTest 
MapTreeTest.app/ix86/linux-gnu/gnu-gnu-gnu/MapTreeTest:
$Id: MapCalls.c,v 1.10 2002/04/22 01:10:56 mppjb Exp $
$Id: MapTreeTest_main.m,v 1.8 2002/04/22 01:10:57 mppjb Exp $
$Id: MapTreeTest.m,v 1.6 2002/04/22 01:10:57 mppjb Exp $
$Id: MTCLog.m,v 1.7 2002/04/22 01:10:55 mppjb Exp $
$Id: MTCTree.m,v 1.17 2002/04/22 01:10:55 mppjb Exp $
$Id: MTVTree.m,v 1.11 2002/04/22 01:10:56 mppjb Exp $
$Id: MTDictionary.m,v 1.11 2002/04/22 01:10:56 mppjb Exp $
$Id: MTObject.m,v 1.4 2002/04/22 01:10:56 mppjb Exp $
$Id: MTFileDS.m,v 1.4 2002/04/22 01:10:56 mppjb Exp $
$Id: MTReference.m,v 1.3 2002/04/22 01:10:56 mppjb Exp $
$Id: MTElement.m,v 1.4 2002/04/22 01:10:56 mppjb Exp $
$Id: MTPoint.m,v 1.3 2002/04/22 01:10:56 mppjb Exp $
$Id: MTCircle.m,v 1.3 2002/04/22 01:10:56 mppjb Exp $
$Id: MTRectangle.m,v 1.4 2002/04/22 01:10:56 mppjb Exp $
$Id: MTPolyline.m,v 1.2 2002/04/22 01:10:56 mppjb Exp $
$Id: MTTree.m,v 1.14 2002/04/22 01:10:56 mppjb Exp $


[pascal@thalassa maptree]$ what -p 
MapTreeTest.app/ix86/linux-gnu/gnu-gnu-gnu/MapTreeTest 
MapTreeTest.app/ix86/linux-gnu/gnu-gnu-gnu/MapTreeTest:
 MapCalls.c                     1.10     2002/04/22 01:10:56 mppjb    Exp     
 MapTreeTest_main.m             1.8      2002/04/22 01:10:57 mppjb    Exp     
 MapTreeTest.m                  1.6      2002/04/22 01:10:57 mppjb    Exp     
 MTCLog.m                       1.7      2002/04/22 01:10:55 mppjb    Exp     
 MTCTree.m                      1.17     2002/04/22 01:10:55 mppjb    Exp     
 MTVTree.m                      1.11     2002/04/22 01:10:56 mppjb    Exp     
 MTDictionary.m                 1.11     2002/04/22 01:10:56 mppjb    Exp     
 MTObject.m                     1.4      2002/04/22 01:10:56 mppjb    Exp     
 MTFileDS.m                     1.4      2002/04/22 01:10:56 mppjb    Exp     
 MTReference.m                  1.3      2002/04/22 01:10:56 mppjb    Exp     
 MTElement.m                    1.4      2002/04/22 01:10:56 mppjb    Exp     
 MTPoint.m                      1.3      2002/04/22 01:10:56 mppjb    Exp     
 MTCircle.m                     1.3      2002/04/22 01:10:56 mppjb    Exp     
 MTRectangle.m                  1.4      2002/04/22 01:10:56 mppjb    Exp     
 MTPolyline.m                   1.2      2002/04/22 01:10:56 mppjb    Exp     
 MTTree.m                       1.14     2002/04/22 01:10:56 mppjb    Exp     


-- 
__Pascal_Bourguignon__                   http://www.informatimago.com/
----------------------------------------------------------------------
There is a fault in reality. Do not adjust your minds. -- Salman Rushdie

what
Description: what command