msakai/ruby-gnome2 — comment on commit aca7d33ac40f877024807edc2fa9dd1d3e6c4672
File: glib2/ext/glib2/rbgutil_callback.c line 170
By now:

Why is this needed? It’s defined in ruby.h if HAVE_RUBY_THREAD_HAS_GVL_P is defined.