2011/7/7 Vitja Makarov <vitja.maka...@gmail.com> > > > 2011/7/7 Stefan Behnel <stefan...@behnel.de> > >> Vitja Makarov, 07.07.2011 08:32: >> >>> 2011/7/7 Stefan Behnel >>> >>> Robert Bradshaw, 06.07.2011 21:32: >>>> >>>> We should get ccache on sage.math to start using it on hudson. >>>> >>>>> >>>>> >>>> It's just a single binary when installed. I have a copy in my >>>> ~/ccache/bin. >>>> Changing the Jenkins jobs now. >>>> >>>> >>>> Is that already used? >>> >> >> Actually, no. I noticed that it would a) require changes to all test jobs, >> and b) prevent us from getting clean test runs. I prefer a safe and clean >> run over a fast one. >> >> > a) you can set CYTHON_RUNTESTS_CCACHE globaly somewhere inside ~/.profile > > > >> Also, the test runner clears the target directory on startup. I wonder >> where you got your numbers from... >> >> > By default ccache stores object files inside ~/.ccache directory, how it > works: > > 1. It runs preprocessor (cpp), then adds compiler version, compilation > flags and so on. > 2. Calculates checksum (md5? I don't know) > 3. Check if it's already in the cache, no compilation is required > > http://ccache.samba.org/ > > So I think that would be safe to use ccache here. > >
How it works: http://ccache.samba.org/manual.html#_how_ccache_works Ccache >=3.0 has new "direct mode" think we should disable this, I was running ccache 2.4 that allways do full preprocessing -- vitja.
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