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Re: Faster Compliations - PCH support?
- From: Shawn Starr <spstarr at sh0n dot net>
- To: Neil Booth <neil at daikokuya dot co dot uk>
- Cc: Andrew Pinski <pinskia at physics dot uc dot edu>, <gcc at gcc dot gnu dot org>
- Date: Sun, 11 Aug 2002 17:18:45 -0400 (EDT)
- Subject: Re: Faster Compliations - PCH support?
I was thinking PCH was generating p-code (bytecode) for header files to be
used when compiling sources.
On Sun, 11 Aug 2002, Neil Booth wrote:
> Andrew Pinski wrote:-
>
> > Read the archives, there are a few different PCH support for gcc
> > and one or a combination might be added to gcc.
> >
> > Also it is not the preprocessing that takes a long time but the
> > parsing that takes the longest time on c++.
> > So it might be faster to change the parsing code which is
> > ongoing, look at the cp-parse branch.
>
> I think you misunderstand the scope of PCH. PCH does a lot more
> than preprocessing; it tends to combine all of preprocessing,
> parsing, decl creation, type layout, semantic checks and possibly
> even more into one. Ideally it would represent all compiler state
> up to the point where the main file's real code begins.
>
> Neil.
>
>
--
Shawn Starr, sh0n.net, <spstarr@sh0n.net>
Maintainer: -shawn kernel patches: http://xfs.sh0n.net/2.4/
Software Engineer, Open Source Development