[Mac OS X 10.7] The examples fails to build with the offline installer

~/Qt5.4.1_os_b94/Examples/Qt-5.4/widgets/widgets/lineedits$ make
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -c -pipe -O2 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk -mmacosx-version-min=10.7 -Wall -W -fPIE -DQT_NO_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I. -I/Users/digia/Qt5.4.1_os_b94/5.4/clang_64/lib/QtWidgets.framework/Versions/5/Headers -I/Users/digia/Qt5.4.1_os_b94/5.4/clang_64/lib/QtGui.framework/Versions/5/Headers -I/Users/digia/Qt5.4.1_os_b94/5.4/clang_64/lib/QtCore.framework/Versions/5/Headers -I. -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/System/Library/Frameworks/OpenGL.framework/Versions/A/Headers -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/System/Library/Frameworks/AGL.framework/Headers -I/Users/digia/Qt5.4.1_os_b94/5.4/clang_64/mkspecs/macx-clang -F/Users/digia/Qt5.4.1_os_b94/5.4/clang_64/lib -o main.o main.cpp
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -c -pipe -O2 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk -mmacosx-version-min=10.7 -Wall -W -fPIE -DQT_NO_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I. -I/Users/digia/Qt5.4.1_os_b94/5.4/clang_64/lib/QtWidgets.framework/Versions/5/Headers -I/Users/digia/Qt5.4.1_os_b94/5.4/clang_64/lib/QtGui.framework/Versions/5/Headers -I/Users/digia/Qt5.4.1_os_b94/5.4/clang_64/lib/QtCore.framework/Versions/5/Headers -I. -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/System/Library/Frameworks/OpenGL.framework/Versions/A/Headers -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/System/Library/Frameworks/AGL.framework/Headers -I/Users/digia/Qt5.4.1_os_b94/5.4/clang_64/mkspecs/macx-clang -F/Users/digia/Qt5.4.1_os_b94/5.4/clang_64/lib -o window.o window.cpp
In file included from window.cpp:41:
In file included from /Users/digia/Qt5.4.1_os_b94/5.4/clang_64/lib/QtWidgets.framework/Versions/5/Headers/QtWidgets:3:
In file included from /Users/digia/Qt5.4.1_os_b94/5.4/clang_64/lib/QtWidgets.framework/Headers/QtWidgetsDepends:3:
In file included from /Users/digia/Qt5.4.1_os_b94/5.4/clang_64/lib/QtCore.framework/Headers/QtCore:13:
/Users/digia/Qt5.4.1_os_b94/5.4/clang_64/lib/QtCore.framework/Versions/5/Headers/qendian.h:312:12: error: use of undeclared identifier '__builtin_bswap16'
    return __builtin_bswap16(source);
           ^
1 error generated.
make: *** [window.o] Error 1