Then /usr/lib/x86_64-linux-gnu/pkgconfig/Qt5Help.pc is already present. Why did you create it manually?
https://packages.ubuntu.com/bionic/amd64/qttools5-dev/filelist In your manually created file the include path is wrong. You need to replace -I${includedir}/QtGui with -I${includedir}/QtHelp. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1858261 Title: pkg-config can not find Qt5Help. Some package files are missing To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qttools-opensource-src/+bug/1858261/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
