[webkit-dev] undefined reference to findXXXX functions

i am building webkit under archlinux using latest source package. it's pop errors when do: CCLD Programs/GtkLauncher ./.libs/libwebkit-1.0.so: undefined reference to `findEntity(char const*, unsigned int)' ./.libs/libwebkit-1.0.so: undefined reference to `findColor(char const*, unsigned int)' ./.libs/libwebkit-1.0.so: undefined reference to `findProp(char const*, unsigned int)' ./.libs/libwebkit-1.0.so: undefined reference to `findValue(char const*, unsigned int)' ./.libs/libwebkit-1.0.so: undefined reference to `findDoctypeEntry(char const*, unsigned int)' can anyone gove some hints.