Hi, @sergey fixed a lot of build errors on OSX today, may be he miss this one.
https://developer.blender.org/rBf2175e06a7455be6ec5affa42444cfae1d9c1726 for example.
Are you up to date with your source?
Build errors are not bugs and not welcome to the bug tracker.
May you wait for some time until a developer steps by.
Cheers, mib