In file included from src/client/psengine.cpp:201:0: src/client/gui/pawsmusicwindow.h:135:5: error: a class-key must be used when declaring a friend src/client/gui/pawsmusicwindow.h:135:5: error: friend declaration does not name a class or function In file included from src/client/psengine.cpp:202:0: src/client/gui/pawssheetline.h:178:5: error: a class-key must be used when declaring a friend src/client/gui/pawssheetline.h:178:5: error: friend declaration does not name a class or function In file included from src/client/psengine.cpp:202:0: src/client/gui/pawssheetline.h:407:5: error: a class-key must be used when declaring a friend src/client/gui/pawssheetline.h:407:5: error: friend declaration does not name a class or function src/client/gui/pawssheetline.h: In member function ‘bool SheetLine::HasLastMeasure()’: src/client/gui/pawssheetline.h:410:14: error: ‘Measure* Measure::next’ is private src/client/gui/pawssheetline.h:491:50: error: within this context src/client/gui/pawssheetline.h: At global scope: src/client/gui/pawssheetline.h:689:5: error: a class-key must be used when declaring a friend src/client/gui/pawssheetline.h:689:5: error: friend declaration does not name a class or function src/client/gui/pawssheetline.h:690:5: error: a class-key must be used when declaring a friend src/client/gui/pawssheetline.h:690:5: error: friend declaration does not name a class or function src/client/gui/pawssheetline.h:691:5: error: a class-key must be used when declaring a friend src/client/gui/pawssheetline.h:691:5: error: friend declaration does not name a class or function C++ ./out/linuxx86/optimize/src/client/psclientchar.o