InitHeaderSearch missing header file?

Hello list,

i am new to Clang and i am trying to make a simple source-to-source

i am at revision 107143 running on openSuse

I have written some code but i am missing the include directories. So
after some google search i found that i could use InitHeaderSearch but i
cannot find a header file to include in my program. Is this class
deprecated? What should i use instead?

Thank you,
Zakkak Foivos