Not c++11 compatible

[oscarthorn]

Hi!

Just wanted to mention that the docs: https://openexr.com/en/latest/install.html#install say that a compiler that supports c++11 is needed but 693a7e4 introduces #include <filesystem> which is a c++17 header. So either support for c++11 and c++14 was dropped but then the docs should change or this was an oversight.

Cheers!

[dylan-reedy]

Bump for visibility. This also caught me by surprise!

[peterhillman]

Indeed, it seems there's a mismatch between the c++ versions mentioned in the docs, the c++ versions the CI system tests with, and the minimum c++ version the code actually requires.

@oscarthorn and @dylan-reedy do you require c++11 or c++14 compatibility, or did you just spot the discrepancy?

[oscarthorn]

@peterhillman I don't need it, just noticed it!