Use c++17 instead of c++2a on GCC.

For now GCC9 and c++2a crashes with ICE somewhere deep in range-v3.
This commit is contained in:
John Preston
2020-01-22 17:25:04 +03:00
parent eee252bb74
commit b0c2ed839d
+1 -1
Submodule cmake updated: b2eb74be1d...67cf2a5abd