Re: [ccache] does ccache include source code modified time into hash?

[Makson Lee]

2014-11-13 4:44 GMT+08:00 Andrew Stubbs a...@codesourcery.com:

 However, it might appropriate to list the factors that can lead to a cache
 miss, and mention some of the factors that explicitly do not cause a miss.


Yes, i think the factors that can lead to a cache miss would be enough,
currently, we are using some kind of version control tool, each time we
reload the same code and recompile it, we get lots of cache miss, so we
need that information to find out why cache miss happens, in direct mode,
maybe a tool can show us all the factors for a source file before compile
would be help too.
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[ccache] does ccache include source code modified time into hash?

[Makson Lee]

i am not sure that whether ccache will re-compile source code if we just
change the modified time of it, can not find much about the details of how
ccache works, in the manual, it just says that ccache will hash the source
code, but what kinds of information of source code are hashed?
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