[cfe-dev] Precompiled header without prefix header ?

Argyrios Kyrtzidis akyrtzi at gmail.com
Mon Mar 18 18:41:08 PDT 2013

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.
> --
> View this message in context: http://clang-developers.42468.n3.nabble.com/Precompiled-header-without-prefix-header-tp4031029.html
> Sent from the Clang Developers mailing list archive at Nabble.com.
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