nativesdk-grpc build failed because protoc binary can't be find

[lihing1994]

• I was attempting to build a SDK with nativesdk-grpc added to TOOLCHAIN_HOST_TASK:append. However, the build failed because protoc was not found. I am using grpc_1.50.1 on the Mickledore branch.

| cd /build/tmp/work/x86_64-nativesdk-pokysdk-linux/nativesdk-grpc/1.50.1-r0/build/protos && /build/tmp/work/x86_64-nativesdk-pokysdk-linux/nativesdk-grpc/1.50.1-r0/recipe-sysroot/usr/local/oe-sdk-hardcoded-buildpath/sysroots/x86_64-pokysdk-linux/usr/bin/protoc --grpc_out=generate_mock_code=true:/build/tmp/work/x86_64-nativesdk-pokysdk-linux/nativesdk-grpc/1.50.1-r0/build/gens --cpp_out=/build/tmp/work/x86_64-nativesdk-pokysdk-linux/nativesdk-grpc/1.50.1-r0/build/gens --plugin=protoc-gen-grpc=/build/tmp/work/x86_64-nativesdk-pokysdk-linux/nativesdk-grpc/1.50.1-r0/recipe-sysroot-native/usr/bin/grpc_cpp_plugin -I . -I /build/tmp/work/x86_64-nativesdk-pokysdk-linux/nativesdk-grpc/1.50.1-r0/recipe-sysroot/usr/local/oe-sdk-hardcoded-buildpath/sysroots/x86_64-pokysdk-linux/usr/include src/proto/grpc/channelz/channelz.proto
| /bin/sh: 1: /build/tmp/work/x86_64-nativesdk-pokysdk-linux/nativesdk-grpc/1.50.1-r0/recipe-sysroot/usr/local/oe-sdk-hardcoded-buildpath/sysroots/x86_64-pokysdk-linux/usr/bin/protoc: not found

• I noticed a commit that addresses this issue on the master branch. Is there a possibility to carry this fix in the grpc recipe for the Mickledore branch? I can confirm the building for the SDK is successes after I added D_gRPC_PROTOBUF_PROTOC_EXECUTABLE=${STAGING_BINDIR_NATIVE}/protoc \ to the EXTRA_OECMAKE in the grpc recipe.

[kraj]

Can you try with https://patchwork.yoctoproject.org/project/oe/patch/20231113084245.96832-1-samuli.piippo@qt.io/ applied ?

[lihing1994]

I attempted to apply this commit, which I believe contains the same fix as the one you provided in the link. But I don't think it really works.

Here is the compile error log

| FAILED: gens/src/proto/grpc/channelz/channelz.grpc.pb.cc gens/src/proto/grpc/channelz/channelz.grpc.pb.h gens/src/proto/grpc/channelz/channelz_mock.grpc.pb.h gens/src/proto/grpc/channelz/channelz.pb.cc gens/src/proto/grpc/channelz/channelz.pb.h /build/tmp/work/x86_64-nativesdk-pokysdk-linux/nativesdk-grpc/1.50.1-r0/build/gens/src/proto/grpc/channelz/channelz.grpc.pb.cc /build/tmp/work/x86_64-nativesdk-pokysdk-linux/nativesdk-grpc/1.50.1-r0/build/gens/src/proto/grpc/channelz/channelz.grpc.pb.h /build/tmp/work/x86_64-nativesdk-pokysdk-linux/nativesdk-grpc/1.50.1-r0/build/gens/src/proto/grpc/channelz/channelz_mock.grpc.pb.h /build/tmp/work/x86_64-nativesdk-pokysdk-linux/nativesdk-grpc/1.50.1-r0/build/gens/src/proto/grpc/channelz/channelz.pb.cc /build/tmp/work/x86_64-nativesdk-pokysdk-linux/nativesdk-grpc/1.50.1-r0/build/gens/src/proto/grpc/channelz/channelz.pb.h
| cd /build/tmp/work/x86_64-nativesdk-pokysdk-linux/nativesdk-grpc/1.50.1-r0/build/protos && /build/tmp/work/x86_64-nativesdk-pokysdk-linux/nativesdk-grpc/1.50.1-r0/recipe-sysroot/usr/local/oe-sdk-hardcoded-buildpath/sysroots/x86_64-pokysdk-linux/usr/bin/protoc --grpc_out=generate_mock_code=true:/build/tmp/work/x86_64-nativesdk-pokysdk-linux/nativesdk-grpc/1.50.1-r0/build/gens --cpp_out=/build/tmp/work/x86_64-nativesdk-pokysdk-linux/nativesdk-grpc/1.50.1-r0/build/gens --plugin=protoc-gen-grpc=/build/tmp/work/x86_64-nativesdk-pokysdk-linux/nativesdk-grpc/1.50.1-r0/recipe-sysroot-native/usr/bin/grpc_cpp_plugin -I . -I /build/tmp/work/x86_64-nativesdk-pokysdk-linux/nativesdk-grpc/1.50.1-r0/recipe-sysroot/usr/local/oe-sdk-hardcoded-buildpath/sysroots/x86_64-pokysdk-linux/usr/include src/proto/grpc/channelz/channelz.proto
| /bin/sh: 1: /build/tmp/work/x86_64-nativesdk-pokysdk-linux/nativesdk-grpc/1.50.1-r0/recipe-sysroot/usr/local/oe-sdk-hardcoded-buildpath/sysroots/x86_64-pokysdk-linux/usr/bin/protoc: not found

[lihing1994]

• FYI. I also tried to upgrade the protobuf to latest version 4.23.4, but it seems like it requires latest version of grpc.

| In file included from /build/tmp/work/x86_64-nativesdk-pokysdk-linux/nativesdk-protobuf/4.23.4-r0/git/src/google/protobuf/extension_set.cc:55:
| /build/tmp/work/x86_64-nativesdk-pokysdk-linux/nativesdk-protobuf/4.23.4-r0/git/src/google/protobuf/port_def.inc:210:35: error: static assertion failed: Protobuf only supports Abseil version 20230125.3 and newer.
|   210 |   (ABSL_LTS_RELEASE_VERSION > (x) || \
|       |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~
|   211 |    (ABSL_LTS_RELEASE_VERSION == (x) && ABSL_LTS_RELEASE_PATCH_LEVEL >= (y)))
|       |    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| /build/tmp/work/x86_64-nativesdk-pokysdk-linux/nativesdk-protobuf/4.23.4-r0/git/src/google/protobuf/port_def.inc:219:15: note: in expansion of macro 'PROTOBUF_ABSL_MIN'
|   219 | static_assert(PROTOBUF_ABSL_MIN(20230125, 3),
|       |               ^~~~~~~~~~~~~~~~~
| ninja: build stopped: subcommand failed.
| WARNING: exit code 1 from a shell command.

• After upgrading both protobuf and grpc, the build still failed, indicating that it requires c++14 or newer. I have no idea what causing this issue. But I guess I need to check out master branch meta-clang instead of mickledore?

[AlexVRud]

Main branch have patch 54885a5

For Mickledore you can write grpc_1.50.1.bbappend:

# https://github.com/openembedded/meta-openembedded/commit/54885a5af2da26d7c84f8aff6fc845c2681b2890

EXTRA_OECMAKE = " \
    -DgRPC_CARES_PROVIDER=package \
    -DgRPC_ZLIB_PROVIDER=package \
    -DgRPC_SSL_PROVIDER=package \
    -DgRPC_PROTOBUF_PROVIDER=package \
    -D_gRPC_PROTOBUF_PROTOC_EXECUTABLE=${STAGING_BINDIR_NATIVE}/protoc \
    -DgRPC_ABSL_PROVIDER=package \
    -DgRPC_RE2_PROVIDER=package \
    -DgRPC_INSTALL=ON \
    -DCMAKE_CROSSCOMPILING=ON \
    -DgRPC_INSTALL_LIBDIR=${baselib} \
    -DgRPC_INSTALL_CMAKEDIR=${baselib}/cmake/${BPN} \
    "