Got this today: n22 /usr/src/uml # make CC="ccache gcc" -j 2 ARCH=um menuconfig HOSTLD scripts/kconfig/mconf HOSTCC scripts/kconfig/lxdialog/checklist.o HOSTCC scripts/kconfig/lxdialog/inputbox.o HOSTCC scripts/kconfig/lxdialog/lxdialog.o HOSTCC scripts/kconfig/lxdialog/menubox.o HOSTCC scripts/kconfig/lxdialog/msgbox.o HOSTCC scripts/kconfig/lxdialog/textbox.o HOSTCC scripts/kconfig/lxdialog/util.o HOSTCC scripts/kconfig/lxdialog/yesno.o HOSTLD scripts/kconfig/lxdialog/lxdialog HOSTLD scripts/kconfig/lxdialog/lxdialog scripts/kconfig/mconf arch/um/Kconfig drivers/net/wireless/bcm43xx/Kconfig:5:warning: 'select' used by config symbol 'BCM43XX' refer to undefined symbol 'HW_RANDOM'
Sounds unlikely but this appears to be usermode specific... HW_RANDOM is defined in drivers/char/hw_random/Kconfig on vanilla
Actually, it's probably bcm43xx that's wrong. It presumably shouldn't be selectable... I'll look into this.