Comment # 12 on bug 1119186 from Wolfgang Bauer

(In reply to Krzysztof Kurek from comment #11)
> I've had clang installed and it didn't suffice.
Are you sure you really had clang installed and not just libclang6? (the latter
is being pulled in by kdevelop5 already)

I just tried on a current Tumbleweed KDE LiveCD, and installing clang (and not
clang-devel) definitely did make the C(++) parser and code completion work, and
the error message disappear.

I'd somehow prefer to just require clang, because clang-devel does have quite
some more dependencies...