"Qt5::Core" references the file...moc...but this file does not exist

[Cris Dywan]

In my CMake project (QuasselIRC) the build fails to find moc after an initial successful build.

Work-around: remove the build folder by hand.

  The imported target "Qt5::Core" references the file

     "/var/lib/lxd/containers/device-armhf/rootfs/usr/lib/arm-linux-gnueabihf/qt5/bin/moc"

  but this file does not exist. Possible reasons include:

  * The file was deleted, renamed, or moved to another location.

  * An install or uninstall procedure did not complete successfully.

  * The installation package was faulty and contained

     "/var/lib/lxd/containers/device-armhf/rootfs/usr/lib/arm-linux-gnueabihf/cmake/Qt5Core/Qt5CoreConfigExtras.cmake"

  but not all the files it references.

Call Stack (most recent call first):
  /var/lib/lxd/containers/device-armhf/rootfs/usr/lib/arm-linux-gnueabihf/cmake/Qt5Core/Qt5CoreConfigExtras.cmake:17 (_qt5_Core_check_file_exists)
  /var/lib/lxd/containers/device-armhf/rootfs/usr/lib/arm-linux-gnueabihf/cmake/Qt5Core/Qt5CoreConfig.cmake:158 (include)
  CMakeLists.txt:198 (find_package)

[Максим Савенков (max-savenkov)]

I encountered the same problem with my own project and the latest version of ubuntu-sdk-tools (0.5+16.04.20160712-0~27~ubuntu16.04.1). It seems like it only happens to some projects, because if I create a project from scratch, there are no problems. But with my project, every time I re-run CMakeLists.txt, I get this error.