I cannot reproduce this on Ubuntu 20.10 amd64. The test CMake project you attached builds fine, and the libQt5Core.so symlink is present:
$ ls -la /usr/lib/x86_64-linux-gnu/libQt5Core.so lrwxrwxrwx 1 root root 20 Aug 19 17:40 /usr/lib/x86_64-linux-gnu/libQt5Core.so -> libQt5Core.so.5.14.2 Can you try re-installing the qtbase5-dev package (sudo apt install --reinstall qtbase5-dev)? ** Changed in: qttools-opensource-src (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1904716 Title: Qt5 UiTools cmake component references unexisting library files To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qttools-opensource-src/+bug/1904716/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs