Probably some missing #include and gcc 4.3 related: compiling ../JavaScriptCore/kjs/debugger.cpp ../JavaScriptCore/kjs/collector.cpp: In function ‘void* KJS::currentThreadStackBase()’: ../JavaScriptCore/kjs/collector.cpp:346: error: ‘pthread_self’ was not declared in this scope ../JavaScriptCore/kjs/collector.cpp:349: error: ‘pthread_attr_init’ was not declared in this scope ../JavaScriptCore/kjs/collector.cpp:357: error: ‘pthread_attr_getstack’ was not declared in this scope ../JavaScriptCore/kjs/collector.cpp:360: error: ‘pthread_attr_destroy’ was not declared in this scope compiling ../JavaScriptCore/kjs/dtoa.cpp for now i'll usemask it until I get a patch
this seems fixed in 4.5.0