RTL8188eu on Raspberry pi

Here's how to cross compile driver for RTL8188eu based wifi dongle

Before this, you need to compile your own raspibian kernel, see my old post:
http://igunosystem.blogspot.co.id/2014/03/step-by-step-building-raspibian-on.html
After above process is OK, You'll have compiled kernel source and working root file system with working chroot (using qemu-arm-static) for raspberry pi board on your Desktop PC.

download source:
https://github.com/lwfinger/rtl8188eu/archive/master.zip
or
git clone https://github.com/lwfinger/rtl8188eu

edit Makefile
ARCH ?= arm
CROSS_COMPILE ?= /arm-linux-gnueabihf-
KVER  :=
KSRC ?= 
MODDESTDIR := /modules//kernel/drivers/net/wireless/
INSTALL_PREFIX := /

Compile: 
make

Install:
As seen from Makefile
install:
    install -p -m 644 8188eu.ko  $(MODDESTDIR)
    @if [ -a /lib/modules/$(KVER)/kernel/drivers/staging/rtl8188eu/r8188eu.ko ] ; then modprobe -r r8188eu; fi;
    @echo "blacklist r8188eu" > /etc/modprobe.d/50-8188eu.conf
    cp rtl8188eufw.bin /lib/firmware/.
    /sbin/depmod -a ${KVER}
    mkdir -p /lib/firmware/rtlwifi
    cp -n rtl8188eufw.bin /lib/firmware/rtlwifi/.

Now copy the 8188eu.ko & rtl8188eufw.bin to somewhere in your running raspberry system or chroot to raspberry folder with qemu-arm-static then do
install -p -m 644 8188eu.ko  /lib/modules/$(uname -r)/kernel/drivers/net/wireless/
depmod -a $(uname -r)
cp -n rtl8188eufw.bin /lib/firmware/rtlwifi/.

You can get my working copy of pre-compiled kernel 3.14y including working mt7601 & rtl8188eu driver from here:
https://www.mediafire.com/?lq5cvlskurcy5y0
Copy to your RaspberryPi SD Card somewhere, extract it, and forced copy to root folder, then Reboot with wifi dongle plugged, you should see the wlan in ifconfig.

source: https://github.com/lwfinger/rtl8188eu