Comment 4 for bug 1858261

Revision history for this message
Dmitry Shachnev (mitya57) wrote :

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.