Building an application against libexo-2 fails. On every inclusion of exo.h the compiler shows an error: /usr/include/exo-2/exo/exo.h:49:29: fatal error: exo/exo-enum-types.h: No such file or directory The actual missing header file is always the first file to included in the Gtk2 section of exo.h (after #if !GTK_CHECK_VERSION(3,0,0)) An easy workaround would be to comment out the whole section in /usr/include/exo-2/exo/exo.h, but this is not a proper fix.
Fixed in master.