Re: git and mtime

[Matthieu Moy <Matthieu.Moy@imag.fr>]

Johannes Schindelin <Johannes.Schindelin@gmx.de> writes:

> Hi,
>
> On Wed, 19 Nov 2008, Matthieu Moy wrote:
>
>> Arafangion <thestar@fussycoder.id.au> writes:
>> 
>> > You should probably fix your build script,
>> 
>> ccache should help:
>
> Only if you _allow_ the problem that makes ccache necessary.  Which we 
> don't.

You do, for some definition of "problem".

make
git checkout whatever
make
git checkout where-you-were-before
make # <--- this one

The last make is correct with plain git and plain make, but it can be
slow. With a cache in your build system, it can just reuse the objects
created during the first "make". It doesn't change correctness, only
performance.

-- 
Matthieu