Hi sorry to bother again, when I try to add gRPC to my SDK (Yocto 2.5) i got these errors
I try first : echo "TOOLCHAIN_HOST_TASK_append += \"grpc\"" >> conf/local.conf
give me 
Error: 
 Problem: conflicting requests
  - package grpc-1.8.5-r0.aarch64 does not have a compatible architecture
I try then : echo "TOOLCHAIN_HOST_TASK_append += \"grpc-native\"" >> conf/local.conf

I now get 
ERROR: Task do_populate_sdk in /iwg27-build-script/iwg27-release-bsp/sources/poky/meta/recipes-core/images/core-image-base.bb rdepends upon non-existent task do_package_write_rpm in virtual:native:/iwg27-build-script/iwg27-release-bsp/sources/meta-openembedded/meta-networking/recipes-devtools/grpc/grpc_1.8.5.bb
ERROR: Command execution failed: 1