Seems that something changed in fixx11h.h:

Building CXX object kdesktop/CMakeFiles/kdeinit_kdesktop-shared.dir/main.cc.o cd /home/serghei/kdebase.build/kdesktop && /usr/bin/c++ -Dkdeinit_kdesktop_shared_EXPORTS -DHAVE_CONFIG_H -DUSE_QT3 -DQT_NO_ASCII_CAST -DQT_CLEAN_NAMESPACE -DQT_NO_STL -DQT_NO_COMPAT -DQT_NO_TRANSLATION -DQT_THREAD_SUPPORT -D_REENTRANT -include tqt.h -fPIC -I/home/serghei/kdebase.build/kdesktop -I/usr/src/trinity/kdebase/kdesktop -I/home/serghei/kdebase.build -I/usr/src/trinity/kdebase/kdmlib -I/usr/src/trinity/kdebase/kcontrol/background -I/usr/src/trinity/kdebase/libkonq -I/usr/kde/3.5/include -I/usr/qt/3/include -I/usr/include/tqt -o CMakeFiles/kdeinit_kdesktop-shared.dir/main.cc.o -c /usr/src/trinity/kdebase/kdesktop/main.cc In file included from /usr/src/trinity/kdebase/kdesktop/main.cc:52: /usr/include/X11/extensions/Xrender.h:75: error: reference to 'Bool' is ambiguous /usr/include/X11/Xdefs.h:47: error: candidates are: typedef int Bool /usr/kde/3.5/include/fixx11h.h:65: error: typedef X::XBool X::Bool /usr/include/X11/extensions/Xrender.h:75: error: reference to 'Bool' is ambiguous /usr/include/X11/Xdefs.h:47: error: candidates are: typedef int Bool /usr/kde/3.5/include/fixx11h.h:65: error: typedef X::XBool X::Bool /usr/include/X11/extensions/Xrender.h:75: error: 'Bool' does not name a type /usr/include/X11/extensions/Xrender.h:80: error: reference to 'Bool' is ambiguous /usr/include/X11/Xdefs.h:47: error: candidates are: typedef int Bool /usr/kde/3.5/include/fixx11h.h:65: error: typedef X::XBool X::Bool /usr/include/X11/extensions/Xrender.h:80: error: reference to 'Bool' is ambiguous /usr/include/X11/Xdefs.h:47: error: candidates are: typedef int Bool /usr/kde/3.5/include/fixx11h.h:65: error: typedef X::XBool X::Bool /usr/include/X11/extensions/Xrender.h:80: error: 'Bool' does not name a type /usr/include/X11/extensions/Xrender.h:203: error: reference to 'Bool' is ambiguous /usr/include/X11/Xdefs.h:47: error: candidates are: typedef int Bool /usr/kde/3.5/include/fixx11h.h:65: error: typedef X::XBool X::Bool /usr/include/X11/extensions/Xrender.h:203: error: reference to 'Bool' is ambiguous /usr/include/X11/Xdefs.h:47: error: candidates are: typedef int Bool /usr/kde/3.5/include/fixx11h.h:65: error: typedef X::XBool X::Bool /usr/include/X11/extensions/Xrender.h:203: error: 'Bool' does not name a type /usr/include/X11/extensions/Xrender.h:213: error: reference to 'Bool' is ambiguous /usr/include/X11/Xdefs.h:47: error: candidates are: typedef int Bool /usr/kde/3.5/include/fixx11h.h:65: error: typedef X::XBool X::Bool /usr/include/X11/extensions/Xrender.h:213: error: reference to 'Bool' is ambiguous /usr/include/X11/Xdefs.h:47: error: candidates are: typedef int Bool /usr/kde/3.5/include/fixx11h.h:65: error: typedef X::XBool X::Bool /usr/include/X11/extensions/Xrender.h:213: error: 'Bool' does not name a type /usr/src/trinity/kdebase/kdesktop/main.cc: In function 'int kdemain(int, char**)': /usr/src/trinity/kdebase/kdesktop/main.cc:220: error: 'XRenderQueryExtension' was not declared in this scope make[2]: *** [kdesktop/CMakeFiles/kdeinit_kdesktop-shared.dir/main.cc.o] Error 1 make[2]: Leaving directory `/home/serghei/kdebase.build' make[1]: *** [kdesktop/CMakeFiles/kdeinit_kdesktop-shared.dir/all] Error 2 make[1]: Leaving directory `/home/serghei/kdebase.build' make: *** [all] Error 2