So far as I can tell, something in 3.18.7+ has screwed things up. None of the thousands of custom hostapd binaries for realtek now work with an RTL8188CUS. All I get at startup is
ioctl[SIOCSIWMODE]: Operation not permitted
Could not set interface to mode(3)!
Could not set interface to master mode!
rtl871xdrv driver initialization failed.
ioctl[SIOCSIWMODE]: Operation not permitted
Could not set interface to mode(3)!
Could not set interface to master mode!
rtl871xdrv driver initialization failed.