Re: [cpp-netlib-devel] Compile-time Reduction Effort

[Dean M. B. <mik...@gm...>]

On Tue, Oct 26, 2010 at 11:50 PM, Nelson, Erik - 2
<eri...@ba...> wrote:
>>Dean Michael Berris wrote:
>>The long compile times can really be addressed by precompiled headers
>>especially if you're using GCC. Clang, well not so much because
>>precompiled headers support is still a little ... well... iffy at this
>>time. :D
>
> Does gcc have any requirements on the usage of precompiled headers?  I
> thought I remembered that no compilable code could appear before the
> precompiled header, which seems like it could lead to strange
> requirements like 'cpp-netlib headers need to be included first in a
> file' in order to get the pch benefit.
>

Well, there's also the single PCH per compilation unit requirement.
This would be perfect for 'boost/network/include/http/client.hpp' and
similar files.

http://gcc.gnu.org/onlinedocs/gcc/Precompiled-Headers.html explains it
in great detail.

For the most part, these are easy -- and actually painless -- to
follow in case you really want to get the advantage of PCH. Otherwise,
that's not really a big burden having PCHs around if they're just
there to help -- I mean, if they aren't used, the normal headers are
used.

> I might be mistaken, just wanted to bring it up.

No worries. Thanks for bringing it up. :)

>
> Clang you don't have to worry about, since it's so fast already, right?
> ;)
>

Hah! Touche. :)

-- 
Dean Michael Berris
deanberris.com