Can't find needed headers

[sobkas]

While trying to use irony-mode to auto-complete content of struct/class it can't find header files included.
I have for example mesa project in ~/repository/pkg_mesa/mesa/.
When I open for example src/gallium/drivers/zink/zink_context.c from above directory all I get is:

In "zink_clear.h":
util/u_rect.h: No such file or directory

I have tried to add .clang_complete:

-I./include
-I./src/gallium/auxiliary/
-I./src/gallium/auxiliary/util/
But it didn't helped.

Any ideas? I followed documentation but couldn't find solution.
Thanks.