[Pkg-postgresql-public] pg_wrapper and readline confusion

[Peter Eisentraut]

The postgresql packages are supposed to be linked with libedit nowadays,
but they are not configured with --with-libedit-preferred, so if
libreadline is installed, they will still end up linked with
libreadline.  Maybe that's actually intentional, but ...

If a postgresql-client-x.y package is linked with libreadline, then
calling pg_wrapper for psql spits out a warning

Use of uninitialized value $lib_path in concatenation (.) or string at /usr/bin/psql line 116.

because of

my ($lib_path) = $out =~ m!(/lib/.*)/libedit.so!;
@readlines = sort(<$lib_path/libreadline.so.?>);

With a patch like the attached one, this could be avoided, if it is
meant to be supported.

Comments?
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