[cfe-dev] Removing InitHeaderSearch

[Edward Meewis]

Hi,

I was looking into polishing up the header inclusion for FreeBSD, due to 
some cmake build issues I have when building the the latest libcxx with 
the latest clang.

It seems that the InitHeaderSearch is almost obsolete, I think that most 
of the header search path information has moved to the 
Frontend/Tool(Chain)(s) files.

It turns out that (naively) removing InitHeaderSearc.cpp broke the CPP 
init and consequently 'diagtool'.

Is it worth while to move CPP to the ToolChain infra?

Regards, Ed.