CMake Proposal

Dan Shearer dan at
Mon Feb 22 14:40:19 MST 2010

On Mon, Feb 22, 2010 at 04:24:11PM -0500, Bill Hoffman wrote:
> Jelmer Vernooij wrote:
> >waf and git don't seem to have problems comparing the checksums of a
> >large number of files in this fashion, so I think this was (is?) more of
> >an issue with the specific implementation in scons.
> >
> Perhaps, I am merely speculating.

git was what came to my mind too, I think it is a definitive example of
the limits of what a build system is going to be able to do with
checksums.  There was lots of discussion about efficiency of SHA1
calculations back when that was decided on for git and it was a problem
to the extent that the algorithm was fiddled for speed reasons. iirc
SHA1 discussions were sufficiently painful that I have no desire to
ferret around in the archives. However git was subjected to intense
scrutiny by a lot of people who really cared about optimisation. I'd be
surprised if the scons or CMake communities have quite that selective

Dan Shearer
dan at

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