[fpc-pascal] FPC 2.7.1 snapshot for Win32

[Juha Manninen]

How to test the compiled FPC snapshot binaries on Windows?
I found a link from this page:
  http://www.freepascal.org/develop.var
under header
  "Download Daily Update of Development Tree (trunk)"
I think it should be
  "Download Daily Compiled Binaries of Development Tree (trunk)"
but it is no big deal. (I would fix it in the wiki but I cannot).

I downloaded a binary package for Win32, unpacked it, adjusted Windows
PATH for the new directory and copied fpc.cfg from older 2.6.4
version.
I did not see anything version dependent in the fpc.cfg so I did not change it.
I have the latest FPC sources from Graeme's git mirror.

fpc starts and a simple  WriteLn('hello');  compiles, but non-trivial
code gives errors because of library units not found.
XML example does not find DOM, Lazarus does not find ServiceManager etc.

I have installed FPC trunk on Linux but I have no recollection of this one.
Should I add path to sources somewhere?
Where can I find short and clear instructions of how to use the binary
snapshots?
For some reason the "/develop.var" page does not have any.

Juha