Re: [PATCH 14/23] fsmonitor-fs-listen-macos: add macos header files for FSEvent

> From: Jeff Hostetler <jeffhost@microsoft.com>
> 
> Include MacOS system declarations to allow us to use FSEvent and
> CoreFoundation APIs.  We need GCC and clang versions because of
> compiler and header file conflicts.

> This is a known problem and tracked in GCC's bug tracker:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93082
> 
> In the meantime, let's not block things and go the slightly ugly route
> of declaring/defining the FSEvents constants, data structures and
> functions that we need, so that we can avoid above-mentioned issue.
> 
> Let's do this _only_ for GCC, though, so that the CI/PR builds (which
> build both with clang and with GCC) can guarantee that we _are_ using
> the correct data types.