[cfe-dev] Precompiled header without prefix header ?

[Fabien Sanglard]

So the documentation at (
http://clang.llvm.org/docs/UsersManual.html#usersmanual-precompiled-headers)
should be disregarded  ?

Fabien

On Mon, Mar 18, 2013 at 9:41 PM, Argyrios Kyrtzidis <akyrtzi at gmail.com>wrote:

> On Mar 18, 2013, at 12:44 PM, fab <fabiensanglard.net at gmail.com> wrote:
>
> I am working on a cross-platform codebase on Clang/MacOS X that is also
> compiled with Visual Studio on Windows and GCC on Linux.
>
> The source code headers always include "precomp_common.h" at the top of
> each
> header files. But according to the Clang documentation
> (
> http://clang.llvm.org/docs/UsersManual.html#usersmanual-precompiled-headers
> )
> Clang will NOT use the PCH in this case and no speed up will be performed
> since it was not include via "- include".
>
> Using Clang it seems the only way is to perform a conditional include:
>
> 1.
> #ifndef __clang__
>   #include "precomp_common.h"
> #endif
>
> 2. Add "precomp_common.h" to the prefix header via -include option.
>
>
> You don't need to do 1.; by doing 2. the "#include "precomp_common.h" will
> just be skipped.
>
>
> I wonder if there is a "cleaner" way to do it.
>
>
>
> --
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