Re: [yocto] using grpc fails with linker error: file in wrong format

["Khem Raj" <raj.khem@gmail.com>]

On 5/24/21 12:37 AM, Juergen Landwehr wrote:
> Hi all,
> 
> I am developing a C++ library that is using gRPC.
> 
> To be able to use protoc for generating the stubs I added the following 
> dependencies:
> 
> DEPENDS += "\
>    grpc-native \
>    protobuf-native \
>    ...
>    "
> 
> 
> and to link my library with cross-compiled libraries:
> 
> RDEPENDS += "\
>     grpc \
>     protobuf \
>     ...
>     "
> 
> However, linking the library fails with the following error:
> 
> ld: 
> /data/jenkins/workspace/e0_mbient_yocto_mbient_manifests_master_downstream/build/tmp/work/cortexa72-mbient-linux/tokenmaster-client/git-r0/recipe-sysroot-native/usr/lib/libgrpc++.so.1.24.3: 
> error adding symbols: file in wrong format
> 
> I guess the problem is, that native grpc++ library is used from the 
> "recipe-sysroot-native" directory and thus not the cross-compiled version.
> 
> What am I doing wrong? How can I tell Yocto to use the cross-compiled 
> versions?

this is upto your component's build system, so perhaps you should look 
into that and ensure that its using right options. Second place to look 
is recipe for your package and ensure right vars and options are passed 
to build. you might want to look at sysdig package build system and see 
how they are doing it and perhaps mimic that for your package too.

> 
> Thanks,
> 
> Jürgen
> 
> 
> 
>