[ccache] stat() versus gcc -v in the hash

Martin Pool mbp at sourcefrog.net
Tue Jul 20 16:05:23 GMT 2004

On 19 Jul 2004, "M. Creidieki Crouch" <creidieki at gmail.com> wrote:
> Hi,
> I've been using ccache with my Gentoo system, and it's working really
> well.  The only problem I'm having is that whenever I recompile my
> system ("emerge --emptytree world"), the mtime of my compiler changes,
> and none of my cache seems to work, even if the compiler is the same
> version and was compiled with the same options.

Why are you rebuilding your compiler if you get exactly the same 
binary?  That sounds like a Gentoo shortcoming.  Maybe as someone
else says you should change emerge to use a smart install that 
checks whether the program has changed?

That might be nice for backup tools and similar things too.


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