Error loading AL_USDMayaPlugin.so: undefined symbol: _ZNK5boost10filesystem4path14root_directoryEv

[pmolodo]

Looks like this is related to the changes here:

f27551a39ed523be41f5fcf39aa3a2d960e45ea8

I'm guessing that there are some changes that haven't gotten pushed, or got lost in a merge, or something, as this:

https://github.com/AnimalLogic/AL_USDMaya/blob/64925975b503b1b0407f23fcc04d80b63837139b/lib/AL_USDMaya/CMakeLists.txt#L198

...would imply that NEED_BOOST_FILESYSTEM needs to be set, but it's not refered to elsewhere. (Also probably need to add filesystem to the list of required boost components, in the top-level cmake).

Or, can make a PR if that would be easier...

[pmolodo]

Added a PR, since we needed a commit anyway for our internal builds. Go ahead and reject if you already have your own in-house fix for this...