This will automatically add DirectWrite support if the required
headers are found. The note about platform support from the help
screen has also been removed, since Windows XP is not officially
supported. Applications that need to run on XP can still build
with -no-directwrite.
Also changed the configure test to be a proper compile test, since
cross-compiled builds for Windows CE may break otherwise.
Change-Id: I7fc7bfb25f2f86ced8a4d4c78a69527de0273707
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
