[CMake] Pointing CMAKE_AUTOMOC to a custom version of Qt and its moc.exe

[Jakob van Bethlehem]

Hej,

On Mon, Nov 7, 2016 at 4:48 PM, Saad Khattak <saadrustam at gmail.com> wrote:

> I am working on a plugin for Maya and it uses a customized version of Qt.
> Maya's SDK comes with everything to build Qt (headers, libraries and
> customized Qt tools such as moc.exe).
>
> I have the following issues:
>
> (1) With CMAKE_AUTOMOC set to ON, I am unable to figure out how to point
> CMake to pick Maya's version of moc.exe (and other Qt utils). The result is
> that I get linking errors since the moc did not run - which I expected.
>
> (2) Maya uses a modified version of Qt 5.6.1. There is currently no way to
> get that version from Autodesk. So I downloaded the official Qt 5.6.1
> distribution. CMAKE_AUTOMOC now sets up my project correctly to be MOC'ed.
> However, it is using the official Qt moc utilities and NOT Maya's
> customized moc. The headers and libraries being used were still from Maya's
> custom Qt.
>
> The reason (2) worked is because I put "find_package(Qt5Widgets REQUIRED)"
> after installing the official version of Qt 5.6.1. However, I did NOT use
> the official Qt headers or libraries - instead, I used Maya's custom
> version of Qt 5.6.1.
>
> Using solution (2) I successfully compile and link my Qt enabled Maya
> plugin and load it in Maya. Things go smoothly until I either (a) unload
> the plugin or (b) delete any widget. I looked at the simplest code that is
> causing a heap corruption debug assertion:
>
> m_button = new QPushButton("MyButton"); // where m_button is a QPointer
> <QPushButton>
> delete m_button; // causes heap corruption debug assertion to fire
>
> A few other people have gone through similar issues but since they didn't
> use CMake, they simply ran Maya's moc utilities in a build step. I would
> like a solution where I can get CMAKE_AUTOMOC to run the custom Qt version.
>
> Thanks.
>
>
I see quite a lot usage of the word 'customized'..... to me it sounds like
you may be asking on the wrong user list?

Sincerely,
Jakob
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