Tielman J de Villiers <tjdevil(at)bondnet(dot)co(dot)za> writes:
> Which would mean the new psql was NOT compiled to support readline, as you
> correctly suggested.
That means the configure script failed to find the libreadline library
file, or include files, or both. You should rerun configure and pay
attention to the steps where it looks for readline-related stuff.
regards, tom lane