Missing include breaks compilation?

[Alexander Zhigalin]

Hello.

During KDevelop compilation I got this error:

> ~/src/kdevelop/languages/clang/codecompletion/completionhelper.h:27:27: fatal error: clang-c/Index.h: No such file

(latest master)

This include is producing that error:

> #include <clang-c/Index.h>

The unique similar file I have found is kdevelop/languages/clang/duchain/clangindex.h
There are includes for both files however...

What I am doing wrong?