ccache support for make buildworld/make release

[Roman Kurakin]

Maxim Sobolev wrote:

> Folks,
>
> I wonder if anyone considered adding ccache support for 
> buildworld/release targets. ccache is a tool, which wraps around gcc, 
> allowing to cache object files generated by the compiler to greatly 
> speed-up compilation of the same code over and over 
> (http://ccache.samba.org/).
>
> It acts as a caching pre-processor to C/C++ compilers, using the -E 
> compiler switch and a hash to detect when a compilation can be 
> satisfied from cache.  This often results in a 5 to 10 times speedup.

Hm. It seems that this is very cool tool. I would glad to see it in FreeBSD.
Since I've 5 branch compiles tooooo long and fast systems for compilation
does not always available/possible to use while development.

I volonteer to test this if needed.

rik

>
> It can benefit both individual developers (less burden to test changes 
> via full buildworld), and tinderboxes.
>
> Another interesting use is for package building cluster - it should be 
> possible to set-up NFS folder shared among all nodes to hold cached 
> objects for all ports in the tree to reduce turnaround time by the 
> order of magnitude.
>
> -Maxim
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