Failed to build 4.3 on GCC 4.9.3 due to -DQT_RESTRICTED_CAST_FROM_ASCII

qt-creator/src/plugins/cmakeprojectmanager[4.3] $ g++ -c -pipe -O2 -std=gnu++1y -fvisibility=hidden -fvisibility-inlines-hidden -Wall -W -D_REENTRANT -fPIC -DCMAKEPROJECTMANAGER_LIBRARY -D'RELATIVE_PLUGIN_PATH="../lib/qtcreator/plugins"' -D'RELATIVE_LIBEXEC_PATH="../libexec/qtcreator"' -D'RELATIVE_DATA_PATH="../share/qtcreator"' -D'RELATIVE_DOC_PATH="../share/doc/qtcreator"' -DIDE_LIBRARY_BASENAME=\"lib\" -DQT_CREATOR -DQT_NO_CAST_TO_ASCII -DQT_RESTRICTED_CAST_FROM_ASCII -DQT_DISABLE_DEPRECATED_BEFORE=0x050600 -DQT_USE_FAST_OPERATOR_PLUS -DQT_USE_FAST_CONCATENATION -DQMAKE_AS_LIBRARY -DPROPARSER_THREAD_SAFE -DPROEVALUATOR_THREAD_SAFE -DPROEVALUATOR_CUMULATIVE -DPROEVALUATOR_DUAL_VFS -DPROEVALUATOR_SETENV -DQT_NO_DEBUG -DQT_PLUGIN -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CONCURRENT_LIB -DQT_NETWORK_LIB -DQT_CORE_LIB -I../../../src -I../../../src -I../../libs -I/home/jkt/work/prog/qt-creator/tools -I../../plugins -I../../shared -I../../libs/3rdparty -I. -isystem /usr/include/qt5 -isystem /usr/include/qt5/QtWidgets -isystem /usr/include/qt5/QtGui -isystem /usr/include/qt5/QtConcurrent -isystem /usr/include/qt5/QtNetwork -isystem /usr/include/qt5/QtCore -I.moc/release-shared -I/usr/lib64/qt5/mkspecs/linux-g++ -o /dev/null cmakebuildstep.cpp
cmakebuildstep.cpp: In static member function ‘static QString CMakeProjectManager::Internal::CMakeBuildStep::cleanTarget()’:
cmakebuildstep.cpp:394:12: error: could not convert ‘(const char*)"clean"’ from ‘const char*’ to ‘QString’
     return "clean";
            ^
cmakebuildstep.cpp: In static member function ‘static QString CMakeProjectManager::Internal::CMakeBuildStep::allTarget()’:
cmakebuildstep.cpp:399:12: error: could not convert ‘(const char*)"all"’ from ‘const char*’ to ‘QString’
     return "all";
            ^
cmakebuildstep.cpp: In static member function ‘static QString CMakeProjectManager::Internal::CMakeBuildStep::installTarget()’:
cmakebuildstep.cpp:404:12: error: could not convert ‘(const char*)"install"’ from ‘const char*’ to ‘QString’
     return "install";
            ^
cmakebuildstep.cpp: In static member function ‘static QString CMakeProjectManager::Internal::CMakeBuildStep::cleanTarget()’:
cmakebuildstep.cpp:395:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
cmakebuildstep.cpp: In static member function ‘static QString CMakeProjectManager::Internal::CMakeBuildStep::allTarget()’:
cmakebuildstep.cpp:400:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
cmakebuildstep.cpp: In static member function ‘static QString CMakeProjectManager::Internal::CMakeBuildStep::installTarget()’:
cmakebuildstep.cpp:405:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^