make -C linux-sunxi O=/home/keghol/arm/sunxi-bsp/build/sun4i_defconfig-linux ARCH=arm oldconfig
make[1]: Entering directory `/home/keghol/arm/sunxi-bsp/linux-sunxi'
  GEN     /home/keghol/arm/sunxi-bsp/build/sun4i_defconfig-linux/Makefile
scripts/kconfig/conf --oldconfig Kconfig
#
# configuration written to .config
#
make[1]: Leaving directory `/home/keghol/arm/sunxi-bsp/linux-sunxi'
make -C linux-sunxi O=/home/keghol/arm/sunxi-bsp/build/sun4i_defconfig-linux ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- -j8 INSTALL_MOD_PATH=output uImage modules
make[1]: Entering directory `/home/keghol/arm/sunxi-bsp/linux-sunxi'
  GEN     /home/keghol/arm/sunxi-bsp/build/sun4i_defconfig-linux/Makefile
scripts/kconfig/conf --silentoldconfig Kconfig
  GEN     /home/keghol/arm/sunxi-bsp/build/sun4i_defconfig-linux/Makefile
  CHK     include/linux/version.h
  Using /home/keghol/arm/sunxi-bsp/linux-sunxi as source for kernel
  /home/keghol/arm/sunxi-bsp/linux-sunxi is not clean, please run 'make mrproper'
  in the '/home/keghol/arm/sunxi-bsp/linux-sunxi' directory.
make[2]: *** [prepare3] Error 1
make[2]: *** Waiting for unfinished jobs....
make[2]: *** wait: No child processes.  Stop.
make[1]: *** [sub-make] Error 2
make[1]: Leaving directory `/home/keghol/arm/sunxi-bsp/linux-sunxi'
make: *** [linux] Error 2
keghol@defiant:~/arm/sunxi-bsp$