Commits
François Saint-Jacques authored and Korn, Uwe committed 9814605c25a
ARROW-4643: [C++] Force compiler diagnostic colors Author: François Saint-Jacques <fsaintjacques@gmail.com> Closes #3724 from fsaintjacques/cmake-cxx-color and squashes the following commits: bdda9cdb <François Saint-Jacques> Fix guard take 2 2ce859e1 <François Saint-Jacques> Add gcc version guard b2acfdb8 <François Saint-Jacques> ARROW-4643: Force compiler diagnostic colors