http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59226
--- Comment #18 from David Kredba <nheghathivhistha at gmail dot com> --- It linked! (After appended "__attribute__((used))" to line "void* JIT_STUB cti_vm_throw(STUB_ARGS_DECLARATION);" in qt-everywhere-opensource-src-4.8.5/src/3rdparty/webkit/Source/JavaScriptCore/jit/JITStubs.h. Same trick as for qtscript for -flto.)