Liang-Chi Hsieh 449ab79e0c
[CI] Use devtoolset-6 because devtoolset-4 is EOL and no longer available (#5506)
* Use devtoolset-6.

* [CI] Use devtoolset-6 because devtoolset-4 is EOL and no longer available

* CUDA 9.0 doesn't work with devtoolset-6; use devtoolset-4 for GPU build only

Co-authored-by: Hyunsu Cho <chohyu01@cs.washington.edu>
2020-04-11 19:49:06 -07:00
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2019-07-17 15:25:35 -07:00