New comment by Johnnynator on void-packages repository

https://github.com/void-linux/void-packages/issues/22616#issuecomment-1071746303

Comment:
First thing, we aren't Alpine, we are Void, so this repo isn't really correct.
But either way the issue is, that musl-obstack doesn't export a `obstack_free` function, only `_obstack_free`.

https://github.com/void-linux/musl-obstack Would be the upstream for `musl-obstack` for both Alpine and Void, you can open an isue there.