Recommended C++ version

Hello,

I saw that some project relies on C++17 features.
Some old distributions have old gcc that support C++11 or C++14.

I was wondering, is there recommended C++ version for Tango?

The upcoming 9.3.3. release will still compile with C++03. Using C++11 is optional but also better.

The tango-9-lts branchs already requires C++11. See also Raise required C++11 and cmake versions · Issue #626 · tango-controls/cppTango · GitHub.