This is merely a historical archive of years 2008-2021, before the migration to mailman3.
A maintained and still updated list archive can be found at https://lists.osmocom.org/hyperkitty/list/op25-dev@lists.osmocom.org/.
Don Adams busterphenajo@yahoo.com [op25-dev] op25-dev at yahoogroups.comJust a wild guess, is swig installed?