Commits

Wes McKinney authored 161d00fbeeb
ARROW-4157: [C++] Fix clang documentation warnings on Ubuntu 18.04 I also added an option `ARROW_USE_CCACHE` to turn ccache on and off Author: Wes McKinney <wesm+git@apache.org> Closes #3310 from wesm/doc-fixes and squashes the following commits: e6c2f203f <Wes McKinney> Fix clang documentation warnings on Ubuntu 18.04