[mythtv] Ticket #4497: Win32 builds broken after r15435

[Nigel Pearson]

> Any idea on how we could fix this issue?

Create a libs/libmyth/libmyth.def containing all the symbols
from that library that libmythui and libmythupnp require,
and add rules in the latter two directories' .pro files.
Something like:

mingw {
     target.path = $${PREFIX}/bin
     implib.target = libmyth-bootstrap.a
     implib.commands = test -e libmyth-bootstrap.a || dlltool --input- 
def ../libmyth/libmyth.def --dllname libmyth-$${LIBVERSION}.dll -- 
output-lib libmyth-bootstrap.a -k
     QMAKE_EXTRA_WIN_TARGETS += implib
     POST_TARGETDEPS += libmyth-bootstrap.a
}



The existing commands like that can probably
also be removed from libs/libmyth/libmyth.pro




I'm trying to setup a Win32 build env now,
but being a Mac and Unix head means that
this is an exercise in cursing and grumbling.
You might be able to fix & test faster than me.

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