Philip Hyunsu Cho 7aed8f3d48
[CI] Upgrade to GCC 5.3.1, CMake 3.6.0 (#4306)
* Upgrade to GCC 5.3.1, CMake 3.6.0

* <regex> is now okay
2019-03-28 00:21:21 -07:00
..
2019-01-30 09:43:57 -08:00