Why is the install procedure for PL/pgSQL depending on libpq?
PL/pgSQL is running on backend, and should not use libpq. I see
followings in the Makefile for PL/pgSQL.
CFLAGS+= -I$(LIBPQDIR) -I$(SRCDIR)/include
SHLIB_LINK+= -L$(LIBPQDIR) -lpq
--
Tatsuo Ishii