[cfe-dev] PCH on Qt

[İsmail Dönmez]

On Tue, Oct 12, 2010 at 2:58 AM, Argyrios Kyrtzidis <kyrtzidis at apple.com>wrote:

> Qt uses gcc's PCH directory, where various PCH files (for different
> languages) are all emitted in a common 'precompiled_header.gch' directory
> and if you do
> "-include precompiled_header.h"
> all PCH files are considered in alphabetical order and the first suitable
> one is used.
>
> Do we want to support that ? It is complicated in our current architecture.
>
> A simpler way would be, when adding support for clang compiler in Qt's
> build system, to inform Qt about clang's PCH way.
> That would just need a '-include-pch' driver option so that Qt can just
> pass the PCH file that should be used (currently I "simulate" this using
> -Xclang -include-pch -Xclang filename).
>

Just adding a clang specific mkspec to Qt sounds like a better idea.

Regards,
ismail
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