There is a problem in the Makefile of libpgtcl on linux (and maybe also on
other platforms). If I do the standard make + make install the shared library
is not linked with the the libpq library and when I try to load it in the
standard Tcl or Tk shell I get a lot of unresolved symbols. The bug doesn't
affect pgtclsh because it is linked also with libpq. The problem exists only
when using the dynamic load feature of Tcl7.5.