GNAT/NT: "-luser32.a not found"

[John English <je@bton.ac.uk>]

We have GNAT installed on an NT server (in K:\GNAT) for use by our
students, but it looks like some registry keys haven't been exported
correctly to the student accounts, and I'm trying to sort out what
we need to do to fix it. The Win32 binding isn't visible, and I
discovered that the HKLM\Software\ACT\GNAT\Standard Libraries key
was missing. I added it manually to a test account, with the name
WIN32 and the value K:\GNAT\Bindings\Win32Ada, but now the linker
reports "-luser32.a not found" (libuser32.a is in K:\GNAT\LIB, btw).

I've looked at my own machine but I can't find anything relating to
the library path -- I always assumed it used the executable's path
to find the library directory, but it seems I'm wrong. RTFM-ing
hasn't turned anything up yet either.

Can anyone tell me the magic spell I need to fix this, please?

-----------------------------------------------------------------
 John English              | mailto:je@brighton.ac.uk
 Senior Lecturer           | http://www.it.bton.ac.uk/staff/je
 Dept. of Computing        | ** NON-PROFIT CD FOR CS STUDENTS **
 University of Brighton    |    -- see http://burks.bton.ac.uk
-----------------------------------------------------------------