In file included from /home/nicolas/Downloads/openlierox/include/SmartPointer.h:16:0,
                 from /home/nicolas/Downloads/openlierox/include/CFont.h:26,
                 from /home/nicolas/Downloads/openlierox/include/LieroX.h:27,
                 from /home/nicolas/Downloads/openlierox/src/client/DeprecatedGUI/Graphics.cpp:17:
/home/nicolas/Downloads/openlierox/include/Debug.h: In function ‘bool DeprecatedGUI::LoadGraphics()’:
/home/nicolas/Downloads/openlierox/include/Debug.h:78:16: error: inlining failed in call to always_inline ‘Logger& endl(Logger&)’: indirect function call with a yet undetermined callee
 INLINE Logger& endl(Logger& __os) { return (__os << "\n").flush(); }
                ^~~~
/home/nicolas/Downloads/openlierox/include/Debug.h:65:88: note: called from here
   Logger& operator<<(Logger& (*__pf)(Logger&)) { return (*__pf)(*push_back_and_unlock()); }
                                                                                        ^
/home/nicolas/Downloads/openlierox/include/Debug.h:78:16: error: inlining failed in call to always_inline ‘Logger& endl(Logger&)’: indirect function call with a yet undetermined callee
 INLINE Logger& endl(Logger& __os) { return (__os << "\n").flush(); }
                ^~~~
/home/nicolas/Downloads/openlierox/include/Debug.h:65:88: note: called from here
   Logger& operator<<(Logger& (*__pf)(Logger&)) { return (*__pf)(*push_back_and_unlock()); }
                                                                                        ^
/home/nicolas/Downloads/openlierox/include/Debug.h:78:16: error: inlining failed in call to always_inline ‘Logger& endl(Logger&)’: indirect function call with a yet undetermined callee
 INLINE Logger& endl(Logger& __os) { return (__os << "\n").flush(); }
                ^~~~
/home/nicolas/Downloads/openlierox/include/Debug.h:65:88: note: called from here
   Logger& operator<<(Logger& (*__pf)(Logger&)) { return (*__pf)(*push_back_and_unlock()); }
                                                                                        ^
/home/nicolas/Downloads/openlierox/include/Debug.h:78:16: error: inlining failed in call to always_inline ‘Logger& endl(Logger&)’: indirect function call with a yet undetermined callee
 INLINE Logger& endl(Logger& __os) { return (__os << "\n").flush(); }
                ^~~~
/home/nicolas/Downloads/openlierox/include/Debug.h:65:88: note: called from here
   Logger& operator<<(Logger& (*__pf)(Logger&)) { return (*__pf)(*push_back_and_unlock()); }
                                                                                        ^
/home/nicolas/Downloads/openlierox/include/Debug.h:78:16: error: inlining failed in call to always_inline ‘Logger& endl(Logger&)’: indirect function call with a yet undetermined callee
 INLINE Logger& endl(Logger& __os) { return (__os << "\n").flush(); }
                ^~~~
/home/nicolas/Downloads/openlierox/include/Debug.h:65:88: note: called from here
   Logger& operator<<(Logger& (*__pf)(Logger&)) { return (*__pf)(*push_back_and_unlock()); }
                                                                                        ^
/home/nicolas/Downloads/openlierox/include/Debug.h:78:16: error: inlining failed in call to always_inline ‘Logger& endl(Logger&)’: indirect function call with a yet undetermined callee
 INLINE Logger& endl(Logger& __os) { return (__os << "\n").flush(); }
                ^~~~
/home/nicolas/Downloads/openlierox/include/Debug.h:65:88: note: called from here
   Logger& operator<<(Logger& (*__pf)(Logger&)) { return (*__pf)(*push_back_and_unlock()); }
                                                                                        ^
/home/nicolas/Downloads/openlierox/include/Debug.h:78:16: error: inlining failed in call to always_inline ‘Logger& endl(Logger&)’: indirect function call with a yet undetermined callee
 INLINE Logger& endl(Logger& __os) { return (__os << "\n").flush(); }
                ^~~~
/home/nicolas/Downloads/openlierox/include/Debug.h:65:88: note: called from here
   Logger& operator<<(Logger& (*__pf)(Logger&)) { return (*__pf)(*push_back_and_unlock()); }
                                                                                        ^
make[2]: *** [CMakeFiles/openlierox.dir/build.make:1239: CMakeFiles/openlierox.dir/src/client/DeprecatedGUI/Graphics.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:68: CMakeFiles/openlierox.dir/all] Error 2
make: *** [Makefile:84: all] Error 2