ccache support for make buildworld/make release

[Ruslan Ermilov]

On Wed, Aug 25, 2004 at 07:21:37PM +0300, 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.
> 
> 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.
> 
From the URL you provided:

: How to use it                                                                                       
:                                                                                                     
:    You can use ccache in two ways. The first is just to prefix your
:    compile commands with "ccache". For example, you could change
:    the "CC=gcc" line in your Makefile to be "CC=ccache gcc".

In our case, it would mean:

	make buildworld CC="/usr/local/bin/ccache cc"


Cheers,
-- 
Ruslan Ermilov
ru at FreeBSD.org
FreeBSD committer
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