First, if you don't have it yet done, install ccache.
HOW IT WORKS
The basic idea is to detect when you are compiling exactly the same code a 2nd time and use the pre-
viously compiled output. You detect that it is the same code by forming a hash of:
o the pre-processor output from running the compiler with -E
o the command line options
o the real compilers size and modification time
o any stderr output generated by the compiler
These are hashed using md4 (a strong hash) and a cache file is formed based on that hash result.
When the same compilation is done a second time ccache is able to supply the correct compiler output
(including all warnings etc) from the cache.
So you get really fast recompiles *except* for classes/*.c. What I'd like to have is (based on ccache's philosophy) a cache for classes/*.dump and classes/*.c files. Currently they are recreated permanently.
NB Fink created wrong permissions for ~/.ccache/*
A:
$ sudo chown -R user:user ~/.ccache
fixed it (if your login and group name is user ;)
leo
