how to build a faster gcc working on a specific project

[问 题]

Hi,

I am working on a project with millions of LOC, which needs really long time to compile. I know gcc has a technique called profile guided optimization(PGO) which makes the compiled program run faster by using some training data. So I am wondering if I can use my project to train gcc while compiling gcc itself. I know gcc provides a make option 'make profiledbootstrap' to train the compiler,  but how can I use my own project to train gcc?

I do know some other techniques like distcc and ccache to speed up compiling, but here I want to focus on gcc.

Tony


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