[ccache] Re: ccache misses most of the time

[Jon Ringle]

Ok, I think I got to the bottom of my issue. I found that compiling with -g3 
causes cache misses, because a different md5sum is calculated each time. -g3 
includes macros in debug info and I'm guessing that there is some macro that 
gets generated differently everytime. Maybe __DATE__ __TIME__, although a 
search through the source code did not reveal any to me.

Jon