bumping this for visibility, in case someone's got ideas on how to debug 
this issue further.


On Monday, September 16, 2024 at 1:15:44 PM UTC-7 Mandeep Sandhu wrote:

> Hey all,
>
> I'm trying to build gRPC from source using this guide: 
> https://grpc.io/docs/languages/cpp/quickstart/
>
> I'm running Ubuntu 22.04.
>
> One thing I'm doing differently is trying to use the system installation 
> of libprobuf & protoc. I'm doing this because I already have a c++ 
> application that uses protobuf & I would like grpc build to use that same 
> installation (the grpc lib will also be used in this c++ application).
>
> This is how I configure gRPC:
>
> cmake -DgRPC_INSTALL=ON \
>     -DgRPC_BUILD_TESTS=OFF \
>     -DCMAKE_INSTALL_PREFIX="/home/mandeep/work/grpc/cmake/install" \
>     -DgRPC_ZLIB_PROVIDER=package \
>     -DgRPC_PROTOBUF_PROVIDER=package \
>     ../..
>
> But with this, I get the error that cmake cannot find the protobuf cmake 
> files:
>
> CMake Error at cmake/protobuf.cmake:58 (find_package):
>   Could not find a package configuration file provided by "Protobuf" with 
> any
>   of the following names:
>
>     ProtobufConfig.cmake
>     protobuf-config.cmake
>
>   Add the installation prefix of "Protobuf" to CMAKE_PREFIX_PATH or set
>   "Protobuf_DIR" to a directory containing one of the above files.  If
>   "Protobuf" provides a separate development package or SDK, be sure it has
>   been installed.
> Call Stack (most recent call first):
>   CMakeLists.txt:377 (include)
>
> I understand that the *.cmake files listed in the error message are not 
> provided in any of the ubuntu-provided protobuf packages.
>
> I did find "protobuf-config.cmake" 
> under third_party/protobuf/cmake/protobuf, but setting that in the cmake 
> configure step also gives an error, although this time its a different 
> error:
>
> -- Could NOT find utf8_range (missing: utf8_range_DIR)
> CMake Error at 
> third_party/protobuf/cmake/protobuf/protobuf-config.cmake:14 (include):
>   include could not find requested file:
>
>     
> /home/mandeep/work/grpc/third_party/protobuf/cmake/protobuf/protobuf-targets.cmake
> Call Stack (most recent call first):
>   cmake/protobuf.cmake:58 (find_package)
>   CMakeLists.txt:377 (include)
>
> Can anyone suggest whats the correct way to configure grpc build to use 
> the system installed protobuf packages?
>
> These are the packages install on my system:
> $ dpkg -l | grep protobuf
> ii  libprotobuf-dev:amd64                         3.12.4-1ubuntu7.22.04.1 
>                           amd64        protocol buffers C++ library 
> (development files) and proto files
> ii  libprotobuf-lite23:amd64                      3.12.4-1ubuntu7.22.04.1 
>                           amd64        protocol buffers C++ library (lite 
> version)
> ii  libprotobuf23:amd64                           3.12.4-1ubuntu7.22.04.1 
>                           amd64        protocol buffers C++ library
> ii  protobuf-compiler                             3.12.4-1ubuntu7.22.04.1 
>                           amd64        compiler for protocol buffer 
> definition files
> ii  python3-protobuf                              3.12.4-1ubuntu7.22.04.1 
>                           amd64        Python 3 bindings for protocol 
> buffers
>
> Thanks for your time
>
> -mandeep
>

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