Change minimum support gcc/g++ version to 9.x
Overview
All RAPIDS projects will require gcc/g++ 9.0+
in order to take advantage of new C++ features, notably including moving to C++17.
This also aligns RAPIDS with the current conda-forge build stack.
Status
All conda
builds and docker
images use gcc/g++ 9.3
starting with v0.20
(now v21.06
).
Impact
Users building from source should use gcc/g++ 9.0
or higher to build RAPIDS.