RE: [GD-General] Redundant Include Guards

[Dirk R. <ri...@ph...>]

At least GCC is smart enough to prevent opening header files if they are
guarded by include guard defines and when they are already parsed. Whether
this applies to MSVC i do not know.

Dirk

-----Original Message-----
From: gam...@li...
[mailto:gam...@li...]On Behalf Of
Parveen Kaler
Sent: Monday, December 16, 2002 3:27 AM
To: gam...@li...
Subject: [GD-General] Redundant Include Guards


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Sticking with the theme of compile times.

I'm reading Large-Scale C++ Software Design at the moment.  The author
recommends redundant include guards in .h files:

// foo.h
#ifndef _INCLUDE_FOO_H_
#define _INCLUDE_FOO_H_


#ifndef _INCLUDE_BAR_H_
#include "bar.h"
#endif

#ifndef _INCLUDE_VECTOR_
#include <vector>
#define _INCLUDE_VECTOR_
#endif

////
....
////

#endif

So I tried this for a project of mine that consists of about 10KLOC.
Compiling with gcc3.2 I saw no difference in compile times.

Are compilers like gcc and msvc smart enough to figure stuff like this
out?  Or is my project just not large enough?  The book was written way
back in 1996, so I'm figuring some of the advice may be a little out of
date.

Parveen

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.7 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQE9/Tnw6jdpm1dGc/cRAiCsAKCb2DuzooUpjSfzd3iFBDO9RexURgCeKHR6
uOTV9eicFER6so6dh5PJyJY=
=nVAC
-----END PGP SIGNATURE-----



-------------------------------------------------------
This sf.net email is sponsored by:
With Great Power, Comes Great Responsibility
Learn to use your power at OSDN's High Performance Computing Channel
http://hpc.devchannel.org/
_______________________________________________
Gamedevlists-general mailing list
Gam...@li...
https://lists.sourceforge.net/lists/listinfo/gamedevlists-general
Archives:
http://sourceforge.net/mailarchive/forum.php?forum_id=557