There is an unused paramer in WebKit2 module(build for EFL port), used only in #if conditional. [ 91%] Building CXX object Source/WebKit2/CMakeFiles/WebKit2.dir/__/__/DerivedSources/WebKit2/WebSoupRequestManagerMessageReceiver.cpp.o /home/kumar.rohit/WebKit/WebKitBuild/Release/DerivedSources/WebKit2/WebPageMessageReceiver.cpp:1041:6: warning: unused parameter ‘connection’ [-Wunused-parameter] void WebPage::didReceiveSyncWebPageMessage(IPC::Connection* connection, IPC::MessageDecoder& decoder, std::unique_ptr<IPC::MessageEncoder>& replyEncoder) ^ Linking CXX shared library ../../lib/libewebkit2.so [ 98%] Built target WebKit2