[webkit-dev] Proposal for a new way to handle porting #ifdefs

[Mark Rowe]

On 2009-05-25, at 13:19, Peter Kasting wrote:

> On Mon, May 25, 2009 at 12:49 AM, Maciej Stachowiak <mjs at apple.com>  
> wrote:
>> Now, the thing I _would_ like to change is to switch from pathless  
>> #includes to ones with relative paths -- but that's a totally  
>> different thread.
>
> That I definitely wouldn't like. It would make it much more painful  
> to move files. What is the benefit? Maybe UI am missing something.
>
> Massively decreased compile time.  We've measured and the time taken  
> to search the various #include paths is large.

Xcode and GCC on Mac OS X avoid this issue by building a map of header  
files in the project and their locations on disk, so the compiler  
doesn't have to walk the header entire search path every time you  
include a file.  It's unfortunate if other compilers aren't smart  
enough to work well with this incredibly common approach to #includes  
and header search paths.

- Mark

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