I am trying to develop an application with gtk3 in c++ and I am using Spacemacs as my main emacs distribution in addition to lsp for c++.
In my main cpp file, I included the following header :
However lsp gives me this error message :
'gtkmm.h' file not found [pp_file_not_found]
So how can I tell to lsp that I am using an external header (here gtk library) in my project? Is it possible to have auto completion for gtk then?