[m-rev.] Lots of compiler related warning messages

[Volker Wysk]

Hi

I'm running MMC version rotd-2025-08-31 and I get lots of warning messages
like this:

Making Mercury/os/fis.actions.o
Mercury/cs/fis.actions.c:307:1: Warnung:
»mercury__fis__actions__handle_devices_7_0« verwendet, aber nirgendwo
definiert
Mercury/cs/fis.actions.c:308:1: Warnung:
»mercury__fis__actions__handle_one_device_7_0« verwendet, aber nirgendwo
definiert
Mercury/cs/fis.actions.c:309:1: Warnung:
»mercury__fis__actions__handle_one_hash_9_0« verwendet, aber nirgendwo
definiert

It's hard to reproduce. Just now it occured, but now I can't reproduce it
when compiling again (with LANG=C this time).

"verwendet, aber nirgendwo definiert" means "(is) used but nowhere defined".

Let me know, when I should try to make an example which reproduces the
problem.

Cheers
Volker