rra@stanford.edu writes:

This issue, ITS#4982, is that no threading flags (not -pthread, not -lpthread, not anything) are passed into the final link line of libldap_r, as near as I can tell.

Right. grepping make >& make.out shows no thread switch in the command line which builds libldap_r.so. Adding the ITS#4982 patch (and not ITS#4981), I got 4 '-pthread's in a row, which should be enough:-)