Dave Cramer <pg(at)fastcrypt(dot)com> writes:
> Is it possible to add the old signatures back for backward
> compatibility ? Something like a tsearch2-compat lib ?
The old signatures were security holes. We are not going to put them
back. I would suggest changing the functions on the 7.4 machine to the
new signatures --- see the 7.4.8 release notes.
regards, tom lane