add support for experimental filesystem - fixes jasonroelofs/rice/197

[thekendalmiller]

Fixes #197

This works on Ubuntu 22.04 and Amazon Linux 2.
I believe __has_include was added in c++17

[jasonroelofs]

A quick search about __has_include and I believe you're right. This looks good, thanks for tracking this down!

[thekendalmiller]

@jasonroelofs Thanks for the help with this. Is there any ETA of when you'll release the next gem version with this fix?

I haven't been able to get bundler to play nice with a gem installed from git and a gem installed from ruby gems. I am encountering something similar to rubygems/rubygems#5249. The issue description and analysis might be wrong because installation order does work out or rice and mini_portile and similar gems would fail if not. I think It's because one gem is from rubygems and one is from git and bundler/ruby gems puts them in separate locations and the require mkmf-rice fails, presumably because the $LOAD_PATH doesn't include the git sourced gems.

[jasonroelofs]

Yeah I can cut a release. I'll get something out this weekend.

[jasonroelofs]

Rice 4.2.1 is out with this change.