[Development] moc output from non-local tool build

[Joerg Bornemann]

On 10/27/21 7:18 PM, Thiago Macieira wrote:
> On Friday, 10 September 2021 07:58:55 PDT Thiago Macieira wrote:
>> Qt 6 supports using the moc from a different build of Qt, to help with the
>> bootstrapping issue and also so you don't always run a debug-mode moc in
>> your debug builds of Qt.
>>
>> Is that moc required to be from the same Qt version as the Qt you're trying
>> to build? Or is there a leeway in accepting slightly different builds?
>>
>> We haven't yet made changes to the moc output that would make it
>> incompatible, but I am thinking of doing that now for plugins and I'd like
>> to know if I have to keep compatibility with a slightly older moc. It's not
>> a problem, I just want to know if this is required.
> 
> ping for decision prior to 6.3 feature freeze.

With https://codereview.qt-project.org/c/qt/qtbase/+/378053 it's now 
possible to turn off the package version check and to use moc of a 
different Qt version.  This requires that moc stays either compatible or 
handles that /version argument outlined elsewhere in this thread.


Joerg