[Inkscape-devel] How to integrate gtk3 in my gtk2 inkscape project.

I hava a plentu of my code written into my inkscape-0.92.5 version of source code.

If compile it with "-DWITH_GTK3_EXPERIMENTAL=ON" the option inkscape not work properly.

if I do cmake it gives me the message: -- Empty package name in Requires or Conflicts in file '(command line arguments)'

Using EXPERIMENTAL Gtkmm 3 build Using external GDL -- Checking for module 'gtkmm-3.0>=3.10,' -- Empty package name in Requires or Conflicts in file '(command line arguments)' -- Checking for module 'gdl-3.0>=3.6' -- Found gdl-3.0, version 3.40.0 Using GDL 3.6 or higher -- Checking for module 'gtkspell3-3.0' -- Found gtkspell3-3.0, version 3.0.10

Is there a log file? How to see what exacly is Requires or Conflicts in file?