Posted by LordOfBikes on
URL: https://forum.librecad.org/LibreCad-2-2-0-alpha-Need-help-with-drawing-a-line-in-C-tp5715519p5715902.html

So you want to include header files from librecad sub project into your plugin sub project.
Then you have to append the paths to the INCLUDEPATH variable in the plugin project file.
This is not related with Qt Creator, only a project property setting issue.

But I assume, that this is not a good idea and will bring more trouble. The plugin interface class should be the only common used source between the main application and the plugin.

Armin