Hello All,

I try to access GPIO of NanoPC T4 and use libfriendlyarm-things.so Library for android.
-Down load source code https://gitlab.com/friendlyelec/rk3399- ... O_LED_Demo

-Following instruction in http://wiki.friendlyarm.com/wiki/index. ... for_RK3399
to 4.3 to compile in Android source code.

Error shows:
ninja: no work to do.
No need to regenerate ninja file
ninja: error: 'out/target/common/obj/APPS/framework-res_intermediates/src/R.stamp', needed by 'out/target/common/obj/APPS/GPIO_LED_Demo_intermediates/src/R.stamp', missing and no known rule to make it
09:28:03 ninja failed with: exit status 1

Can anyone help to fix this compile issue?

Thank you