I have been able to fix it by searching for the right grpc libraries in the
recipe-sysroot:
find_library(GRPC_LIBRARY grpc++
HINTS
${CMAKE_SOURCE_DIR}/recipe- sysroot)
if (GRPC_LIBRARY-NOTFOUND)
message(FATAL_ERROR "Could not find grpc++")
endif ()
find_path(GRPC_INCLUDE_DIR grpc++/grpc++.h
HINTS
${CMAKE_SOURCE_DIR}/recipe- sysroot)
add_library(gRPC::grpc++ UNKNOWN IMPORTED)
set_target_properties(gRPC:: grpc++
PROPERTIES INTERFACE_INCLUDE_DIRECTORIES
"${GRPC_INCLUDE_DIR}")
set_target_properties(gRPC:: grpc++
PROPERTIES IMPORTED_LOCATION
"${GRPC_LIBRARY}")
set(GRPC_LIBRARIES gRPC::grpc++)
and then at the end add to link the found grpc library to your application:
target_link_libraries(${ PROJECT_NAME}
PRIVATE protobuf::libprotobuf
PRIVATE ${GRPC_LIBRARIES}
)
I haven't changed anything to my recipe, just that I added an environment
setting which gets set as "YOCTO" to only execute this when it's being ran by
Yocto. Can do less hard coding (setting the hint as ${CMAKE_SOURCE_DIR}/recipe-
sysroot) by looking in CMAKE_SYSROOT.
This doesn't seem like an easy patch to add to gRPC. And since the issue, which
I linked in my first post, got already closed without providing a real
solution; it seems like the people at gRPC aren't really sure what is happening
either.
Kind regards,
Goran Broeckaert
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