Gtkmm4 does not depend on Atkmm (master)
Gtk4 has dropped the dependency on atk. Gtkmm4 (master branch) has dropped the dependency on atkmm, and indirectly the dependency on atk.
Gtkmm commit "Drop dependency on Atkmm": 0fc81d34
@fanc999 Can you please make necessary changes in the MSVC_NMake directory. The atkmm dependency has been dropped only in the master branch.
An unrelated question: Do you know anything about the files in the win32_installer directory? Are they still useful? Shall they be updated? Shall the directory be removed?