GMR 207: optionally import C++GSL and Range-v3 (header) libraries (!86) · Merge requests · atlas / Gaudi

apply Gaudi Merge Request 207: gaudi/Gaudi!207 (merged)

If requested, download and install in Gaudi InstallArea the headers only libraries

CMake options can be used to chose to/not to embed those libraries and use system (or LCG) provided versions.

GMR 207: optionally import C++GSL and Range-v3 (header) libraries