qtdeclarative has a few conditions that check the gcc version
via variables like QT_GCC_MAJOR_VERSION.
To handle that, parse the CMake compiler version using
qt_parse_version_string() into separate variables like
QT_COMPILER_VERSION_MAJOR, QT_COMPILER_VERSION_MINOR and
QT_COMPILER_VERSION_PATCH. We can then map the conditions
appropriately.
Also, handle isEqual(foo, bar), which is equivalent equals(foo,bar).
Change-Id: I74575c733b44f1f42451e00038b3f113fd353915
Reviewed-by: Qt CMake Build Bot
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
962ee4ea37