在 Ubuntu 20.04 中没有 Qt4

我刚升级到Ubuntu Focal Fossa，发现缺少Qt4意味着无法构建antimicro

我注意到这篇文章说它可以与 libqt4-dev 一起使用，我相信它会在早期版本的 Ubuntu 上编译得很好。

有什么方法可以在 Focal Fossa 上安装 Qt4？

使用 Qt5，它达到 100%，但在 100% 时失败并给出很多错误：

Scanning dependencies of target antimicro_autogen
[  1%] Automatic MOC for target antimicro
[  1%] Built target antimicro_autogen
[  2%] Generating qrc_resources.cpp
[  2%] Generating ui_mainwindow.h
[  3%] Generating ui_axiseditdialog.h
/home/...../Desktop/antimicro-master/src/axiseditdialog.ui: Warning: Z-order assignment: '' is not a valid widget.
/home/...../Desktop/antimicro-master/src/axiseditdialog.ui: Warning: Z-order assignment: 'verticalSpacer' is not a valid widget.
/home/...../Desktop/antimicro-master/src/axiseditdialog.ui: Warning: Z-order assignment: 'verticalSpacer_2' is not a valid widget.
[  4%] Generating ui_advancebuttondialog.h
/home/...../Desktop/antimicro-master/src/advancebuttondialog.ui: Warning: Z-order assignment: 'verticalSpacer_5' is not a valid widget.
/home/...../Desktop/antimicro-master/src/advancebuttondialog.ui: Warning: Z-order assignment: '' is not a valid widget.
/home/...../Desktop/antimicro-master/src/advancebuttondialog.ui: Warning: Z-order assignment: 'verticalSpacer_6' is not a valid widget.
/home/...../Desktop/antimicro-master/src/advancebuttondialog.ui: Warning: Z-order assignment: 'verticalSpacer_2' is not a valid widget.
/home/...../Desktop/antimicro-master/src/advancebuttondialog.ui: Warning: Z-order assignment: '' is not a valid widget.
/home/...../Desktop/antimicro-master/src/advancebuttondialog.ui: Warning: Z-order assignment: 'verticalSpacer' is not a valid widget.
/home/...../Desktop/antimicro-master/src/advancebuttondialog.ui: Warning: Z-order assignment: '' is not a valid widget.
/home/...../Desktop/antimicro-master/src/advancebuttondialog.ui: Warning: Z-order assignment: 'verticalSpacer_4' is not a valid widget.
/home/...../Desktop/antimicro-master/src/advancebuttondialog.ui: Warning: Z-order assignment: '' is not a valid widget.

[100%] Linking CXX executable bin/antimicro
/usr/bin/ld: CMakeFiles/antimicro.dir/src/main.cpp.o: in function `QtPrivate::MetaObjectForType<JoyButtonSlot*, void>::value()':
main.cpp:(.text._ZN9QtPrivate17MetaObjectForTypeIP13JoyButtonSlotvE5valueEv[_ZN9QtPrivate17MetaObjectForTypeIP13JoyButtonSlotvE5valueEv]+0xb): undefined reference to `JoyButtonSlot::staticMetaObject'
/usr/bin/ld: CMakeFiles/antimicro.dir/src/main.cpp.o: in function `QtPrivate::MetaObjectForType<SetJoystick*, void>::value()':
main.cpp:(.text._ZN9QtPrivate17MetaObjectForTypeIP11SetJoystickvE5valueEv[_ZN9QtPrivate17MetaObjectForTypeIP11SetJoystickvE5valueEv]+0xb): undefined reference to `SetJoystick::staticMetaObject'
/usr/bin/ld: CMakeFiles/antimicro.dir/src/main.cpp.o: in function `QtPrivate::MetaObjectForType<InputDevice*, void>::value()':

collect2: error: ld returned 1 exit status
make[2]: *** [CMakeFiles/antimicro.dir/build.make:1804: bin/antimicro] Error 1
make[1]: *** [CMakeFiles/Makefile2:165: CMakeFiles/antimicro.dir/all] Error 2
make: *** [Makefile:130: all] Error 2

非常感谢任何帮助！