Windows Compile Error - Too many input files specified

[NotGovernor]

I was working through the getting started book and ran into an error when I got to the point of building. So, to make sure it was nothing I did I grabbed the example from https://github.com/KDAB/cxx-qt/tree/main/examples/cargo_without_cmake

The only change I made was to the cargo.toml -- replacing the dependencies sections with the following:

[dependencies]
cxx = "1.0.110"
cxx-qt = "0.6.0"
cxx-qt-lib = "0.6.0"

[build-dependencies]
cxx-qt-build = { version = "0.6", features = [ "link_qt_object_files" ] }

Upon cargo run I get:

--- stderr
  thread 'main' panicked at 'moc failed for M:\ProjectFolder\target\debug\build\qml-minimal-no-cmake-2d740819407cd4a8\out/cxx-qt-gen/qobject.cxxqt.h:
  moc: Too many input files specified: 'Files/QT' 'Windows' 'Desktop' '6.6.1' 'win64_mingw/6.6.1/mingw_64/include/QtNetwork' 'Files/QT' 'Windows' 'Desktop' '6.6.1' 'win64_mingw/6.6.1/mingw_64/include/QtCore' 'Files/QT' 'Windows' 'Desktop' '6.6.1' 'win64_mingw/6.6.1/mingw_64/include/QtGui' 'Files/QT' 'Windows' 'Desktop' '6.6.1' 'win64_mingw/6.6.1/mingw_64/include/QtQml' 'Files/QT' 'Windows' 'Desktop' '6.6.1' 'win64_mingw/6.6.1/mingw_64/include' 'M:\M:\ProjectFolder\target\debug\build\qml-minimal-no-cmake-2d740819407cd4a8\out/cxx-qt-gen/qobject.cxxqt.h'
  ', C:\Users\UserName\.cargo\registry\src\index.crates.io-6f17d22bba15001f\qt-build-utils-0.6.0\src\lib.rs:569:13
  stack backtrace:
     0: std::panicking::begin_panic_handler
               at /rustc/eb26296b556cef10fb713a38f3d16b9886080f26/library\std\src\panicking.rs:593
     1: core::panicking::panic_fmt
               at /rustc/eb26296b556cef10fb713a38f3d16b9886080f26/library\core\src\panicking.rs:67
     2: qt_build_utils::QtBuild::moc
     3: cxx_qt_build::CxxQtBuilder::build
     4: __ImageBase
     5: core::ops::function::FnOnce::call_once

QT was installed with aqtinstall and the path to its bin was added to the system paths.

qmake --version returns:

QMake version 3.1
Using Qt version 6.6.1 in C:/QT Windows Desktop 6.6.1 win64_mingw/6.6.1/mingw_64/lib

Any assistance would be appreciated.

[ahayzen-kdab]

Thanks for taking the time to report this issue

Looks like something went wrong in the build side and it has decided to pass a load of folders to moc.

Are you able to provide a minimal example of the source code to the problem so that we can try to reproduce ?

I also note that you are using mingw_64 currently we only test with msvc2019, so maybe that is worth checking whether this is just a mingw specific issue but it seems more likely to be our build system.

[NotGovernor]

Thanks for the reply.

The source code is the example repo mentioned above with the one specified change in the cargo.yaml

As for mingw_64 -- its possible I chose poorly. I'm new to cxx and to qt and to incorporating c++ libraries in this way. I will see if I can switch to msvc2019 and see if that works.

Thanks again!

[ahayzen-kdab]

Thanks! I'll also try and check if I can reproduce the issue when next on Windows :-)

[NotGovernor]

There were spaces in the path to the QT libraries bin folder and moc wasn't parsing them correctly. When I removed them this error was gone.

I'll leave it to you guys to decide what to do with this issue. :)

Thanks for the responses.

[NotGovernor]

And also for the record, and for future readers, switching qt to win64_msvc2019_64 seems to have resolved some other issues I was having as well. :)

Is there a chat or discord community somewhere we can talk with people about this project?

[Be-ing]

C:/QT Windows Desktop 6.6.1 win64_mingw/6.6.1/mingw_64/lib

How did you install Qt? Using the official Qt binary installer? Is that a path that it uses by default?

[NotGovernor]

Install info is in OP -- you set the path you want. Best practices for windows have these in "Program Files". But in any case -- windows is a space-laden OS. :D

[ahayzen-kdab]

Is there a chat or discord community somewhere we can talk with people about this project?

@NotGovernor Note we now have https://cxx-qt.zulipchat.com :-)

[NotGovernor]

Thank you. :)