[HarfBuzz] Subset

[Patrick]

Hello all,

I am a user of the great harfbuzz library and try to explore it a bit
more. After downloading the current version of the repository and
building the library on macOS, I have the following questions. I am
not a systems programmer, so these might be "stupid questions"

1) I see that the subsetting features are in a separate library,
1 a) Is that correct?
1 b) Is there any plan to merge these in one library? (Not a feature
request, just a question. The background is that homebrew on macOS
seems to distribute only the non-subset library)

2) When I compile a program, do I have to link to both libraries? Like
-lharfbuzz-subset -lharfbuzz (background: I try to make a Go binding,
and cannot at the moment distinguish between stupid mistake on my side
and a real error message:

3) The manual at https://harfbuzz.github.io does not seem to list the
subset functions (hb_subset,...). Is that an oversight on my side or
are these functions not listed there on purpose?

Thank you very much for providing harfbuzz!

 Patrick