Ok so with that plus the libzip packages already in the repo I am able to get gtfs2db from that git repo to compile and run. Running it on https://gtfsrt.api.translink.com.au/GTFS/SEQ_GTFS.zip generates a sqlite db but with no entries. What I dont know is whether there is something wrong with the data, something wrong with gtfs2db or something wrong with one of the dependencies I am using (libcsv, libzip or sqlite)

Can anyone help me get it working?