pgsql-bugs@postgresql.org writes:
> tab-complete.o: In function `psql_completion':
> tab-complete.o(.text+0x53): undefined reference to `rl_completion_append_character'
> tab-complete.o(.text+0x1496): undefined reference to `rl_completion_append_character'
What Postgres version are you using? There's been a configure test for
ancient libreadlines without rl_completion_append_character in there for
awhile now.
If you don't want to update your postgres, updating your libreadline
would work too ;-)
regards, tom lane