[mythtv] Plugin building problem (6373 and later)

[Preston Crow]

I know this is rather old at this point, but when I try to build plugins
at revision 6373 or later, I get:

cd mythgame && qmake mythgame.pro -o Makefile
cd mythgame && make -f Makefile
make[1]: Entering directory `/var/tmp/portage/mythgame-svn-0.18/work/mythgame/mythgame'
cd mythgame && qmake mythgame.pro -o Makefile
cd mythgame && make -f Makefile
make[2]: Entering directory `/var/tmp/portage/mythgame-svn-0.18/work/mythgame/mythgame/mythgame'
make[2]: *** No rule to make target `mythconfig.mak', needed by `Makefile'.  Stop.
make[2]: Leaving directory `/var/tmp/portage/mythgame-svn-0.18/work/mythgame/mythgame/mythgame'
make[1]: *** [sub-mythgame] Error 2
make[1]: Leaving directory `/var/tmp/portage/mythgame-svn-0.18/work/mythgame/mythgame'
make: *** [sub-mythgame] Error 2

I have:
mythconfig.mak -> /usr/include/mythtv/mythconfig.mak
in the top build directory.

I'm assuming that I'm just missing some path or configuration option,
but I don't see it.  I am using "--prefix=/usr" of course (or I wouldn't
get the link that I am getting).

Any clue what I'm doing wrong?

--PC