storePixel<BPP32> missing implementation on big-endian platforms

g++ Wl,no-undefined -Wl,version-script,QtGui.version -fuse-ld=gold -Wl,enable-new-dtags -Wl,-gdb-index -Wl,-rpath,/home/rutledge/dev/qt5-dbg/qtbase/lib -shared -Wl,-soname,libQt5Gui.so.5 -o libQt5Gui.so.5.12.0 .obj/qimage_compat.o .obj/qaccessible.o ... .obj/moc_qopengltimerquery.o -L/home/rutledge/dev/qt5-dbg/qtbase/lib -lQt5Core -lpthread -latomic -lGL -lpng12 -lqtharfbuzz -lz
/home/rutledge/dev/qt5/qtbase/src/gui/painting/qdrawhelper.cpp:596: error: undefined reference to 'void storePixel<(QPixelLayout::BPP)6>(unsigned char*, int, unsigned int)'
collect2: error: ld returned 1 exit status
Makefile:1240: recipe for target '../../lib/libQt5Gui.so.5.12.0' failed