Re: [GD-General] Redundant Include Guards

[Javier A. <ja...@py...>]

gcc detects include guards automatically and will not reopen a guarded
header, at least it used to... msvc has the #pragma once thing so I guess it
doesn't autodetect guarded headers.

That said, the first thing you want to do is structure your code and headers
so that the number of header files included by other headers files (main
source of re-includes) is minimal. Once you're there, redundant include
guards buy you less and less.

Parveen Kaler <pk...@sf...> wrote:
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>
> 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:
>
> 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 out of date.

  Javier Arevalo
  Pyro Studios