desktop.cpp:83:47: error: jabber_whiteboard/session-manager.h: No such file or directory desktop.cpp: In member function ‘void SPDesktop::init(SPNamedView*, SPCanvas*)’: desktop.cpp:297: error: invalid use of undefined type ‘struct Inkscape::Whiteboard::SessionManager’ desktop.h:55: error: forward declaration of ‘struct Inkscape::Whiteboard::SessionManager’ desktop.cpp: In member function ‘void SPDesktop::destroy()’: desktop.cpp:371: warning: possible problem detected in invocation of delete operator: desktop.cpp:371: warning: invalid use of undefined type ‘struct Inkscape::Whiteboard::SessionManager’ desktop.h:55: warning: forward declaration of ‘struct Inkscape::Whiteboard::SessionManager’ desktop.cpp:371: note: neither the destructor nor the class-specific operator delete will be called, even if they are declared when the class is defined. make[2]: *** [desktop.o] Error 1 make[1]: *** [all-recursive] Error 1 make: *** [all] Error 2