make[1]: *** No rule to make target 'lib/libmbedtls/mbedtls/include/mbedtls/config.h', needed by 'out/arm/ta_arm64-lib/libutee/tee_api_arith_mpi.o'. Stop.

[PramitaPandit]

I received this error while following the instructions from the documentation: https://optee.readthedocs.io/en/latest/building/devices/qemu.html#qemu-v8

Can anyone help ?

[jenswikl]

You're recompiling optee_os after changing to another commit. This usually works well, but if a .h file has been removed you'll see errors like this. The easiest to to just remove optee_os/out and try again.