While it may be smarter to move to a different build system altogether,
it is also a *lot* more work. This was a fairly minor syntax refresh to
get nmake working with our existing Makefile system. This is now no
longer compatible with Borland make, so you will need to use `nmake` to
build.
The presence of NMAKE.md informs builds systems that nmake should be
used instead of make.
We no longer need to backup debug files as they are saved to the symbol
store during a release build. This reduces the amount of storage
required for a release build and should speed up the build also.
Also fixes the broken build where backup had not been updated for the
new consistent build paths.
This is the first half of a two-part update to Keyman for Windows. There
are two significant changes here. These changes apply to
keyman32/keyman64, as well as kmtip/kmtip64, but will refer to the
32-bit equivalents for simplicity:
1. Instead of using `GetProcAddress` to connect to keyman32.dll, we
now have an import library connection. This removes one particularly
suspect piece of architecture for Keyman, as using `GetProcAddress`
could lead to a race condition, where keyman32.dll is unloaded after
that function is called but before we use the handle. This makes the
kmtip.dll build dependent on keyman32.dll; loading kmtip.dll (by
selecting a Keyman input method) also loads keyman32.dll.
2. It's not enough (yet) to load kmtip.dll. We also need to be running
keyman.exe itself, due to global hooks that we still require (it may
be possible, one day, to avoid these, but it doesn't look very
hopeful). To that end, kmtip calls new function `TIPIsKeymanRunning`
to check whether keyman32.dll is initialised (and hence keyman.exe
has initialised it). Then, if keyman.exe is not running, it issues an
event to the Windows Event Log, which we will pick up with a
scheduled task in the next PR.
The first part of this is an architectural change which may lead to some
change in behaviours, as keyman32.dll now may not be unloaded from a
process when keyman.exe exits, due to the lock that kmtip.dll now has on
it. It will be important to test this (@MakaraSok) by running through
various startup and shutdown scenarios. In my initial testing, I found
that there were some situations after restarting keyman.exe where I
needed to switch in and out of the Keyman TIP, but those were not all
critical.
This change also lays groundwork for an eventual ability to run the
Keyman input method without keyman.exe running, which will be helpful
e.g. on login screen, even if missing certain additional functionality
such as the serialised input queue.
