Cannot build fprime-zephyr reference project

[ReggieMarr]

I was trying to follow along with the zephyr reference project so as to add support for more boards and I ran into this issue:

Alternatively when I adjust the cmakelists.txt like so

restrict_platforms(Zephyr)

add_fprime_subdirectory("${CMAKE_CURRENT_LIST_DIR}/Top/")
set(SOURCE_FILES "${CMAKE_CURRENT_LIST_DIR}/Stub.cpp")
set(MOD_DEPS ${FPRIME_CURRENT_MODULE}/Top)
register_fprime_deployment()

target_sources(app PRIVATE
    "${CMAKE_CURRENT_LIST_DIR}/Main.cpp"
)

target_link_libraries(LedBlinker_Top PUBLIC zephyr_interface)

add_dependencies(LedBlinker zephyr)
target_link_libraries(LedBlinker PUBLIC zephyr_interface)
target_link_libraries(LedBlinker PUBLIC zephyr)
set_target_properties(LedBlinker PROPERTIES
    ENABLE_EXPORTS ON
)

# Use Zephyr's link group mechanism
target_link_libraries(app PUBLIC
    LedBlinker_Top
    LedBlinker
)

set_target_properties(Svc_FatalHandler PROPERTIES EXCLUDE_FROM_ALL TRUE)

and build manually I encounter this error:

FAILED: bin/zephyr/LedBlinker 
: && ccache /home/user/zephyr-sdk-0.17.0/arm-zephyr-eabi/bin/arm-zephyr-eabi-g++  -gdwarf-4 LedBlinker/CMakeFiles/LedBlinker.dir/Stub.cpp.obj LedBlinker/CMakeFiles/LedBlinker.dir/__/fprime/Os/Stub/DefaultFile.cpp.obj LedBlinker/CMakeFiles/LedBlinker.dir/__/fprime-baremetal/fprime-baremetal/Os/Baremetal/DefaultCpu.cpp.obj LedBlinker/CMakeFiles/LedBlinker.dir/__/fprime-baremetal/fprime-baremetal/Os/Baremetal/DefaultMemory.cpp.obj LedBlinker/CMakeFiles/LedBlinker.dir/__/fprime-zephyr/Zephyr/Os/DefaultQueue.cpp.obj LedBlinker/CMakeFiles/LedBlinker.dir/__/fprime-zephyr/Zephyr/Os/DefaultMutex.cpp.obj LedBlinker/CMakeFiles/LedBlinker.dir/__/fprime-zephyr/Zephyr/Os/DefaultTask.cpp.obj LedBlinker/CMakeFiles/LedBlinker.dir/__/fprime-zephyr/Zephyr/Os/DefaultConsole.cpp.obj LedBlinker/CMakeFiles/LedBlinker.dir/__/fprime-zephyr/Zephyr/Os/DefaultRawTime.cpp.obj -o bin/zephyr/LedBlinker  lib/zephyr/libconfig.a  lib/zephyr/libFw_Cfg.a  lib/zephyr/libFw_Types.a  lib/zephyr/libFw_Logger.a  lib/zephyr/libFw_Obj.a  lib/zephyr/libFw_Port.a  lib/zephyr/libFw_Time.a  lib/zephyr/libFw_Comp.a  lib/zephyr/libZephyr_Svc_ZephyrTime.a  lib/zephyr/libFw_Com.a  lib/zephyr/libFw_Tlm.a  lib/zephyr/libFw_Log.a  lib/zephyr/libFw_Cmd.a  lib/zephyr/libFw_Prm.a  lib/zephyr/libFw_Buffer.a  lib/zephyr/libDrv_Ports.a  lib/zephyr/libSvc_Sched.a  lib/zephyr/libComponents_Led.a  lib/zephyr/libSvc_Fatal.a  lib/zephyr/libfprime-baremetal_Svc_FatalHandler.a  lib/zephyr/libZephyr_Drv_ZephyrGpioDriver.a  lib/zephyr/libOs.a  lib/zephyr/libSvc_Cycle.a  lib/zephyr/libZephyr_Drv_ZephyrRateDriver.a  lib/zephyr/libDrv_ByteStreamDriverModel.a  lib/zephyr/libZephyr_Drv_ZephyrUartDriver.a  lib/zephyr/libSvc_Ping.a  lib/zephyr/libFw_CompQueued.a  lib/zephyr/libSvc_ActiveLogger.a  lib/zephyr/libSvc_AssertFatalAdapter.a  lib/zephyr/libSvc_CmdDispatcher.a  lib/zephyr/libUtils_Hash.a  lib/zephyr/libUtils_Types.a  lib/zephyr/libSvc_FramingProtocol.a  lib/zephyr/libSvc_Deframer.a  lib/zephyr/libFw_Ports_SuccessCondition.a  lib/zephyr/libSvc_Framer.a  lib/zephyr/libSvc_PassiveConsoleTextLogger.a  lib/zephyr/libSvc_PassiveRateGroup.a  lib/zephyr/libSvc_RateGroupDriver.a  lib/zephyr/libSvc_StaticMemory.a  lib/zephyr/libSvc_SystemResources.a  lib/zephyr/libSvc_TlmChan.a  lib/zephyr/libLedBlinker_Top.a  lib/zephyr/libOs_File_Stub.a  lib/zephyr/libOs_Cpu_Baremetal.a  lib/zephyr/libOs_Memory_Baremetal.a  lib/zephyr/libOs_Queue_Zephyr.a  lib/zephyr/libOs_Mutex_Zephyr.a  lib/zephyr/libOs_Task_Zephyr.a  lib/zephyr/libOs_Console_Zephyr.a  lib/zephyr/libOs_RawTime_Zephyr.a  zephyr/libzephyr.a  lib/zephyr/libZephyr_Svc_ZephyrTime.a  lib/zephyr/libComponents_Led.a  lib/zephyr/libfprime-baremetal_Svc_FatalHandler.a  lib/zephyr/libZephyr_Drv_ZephyrGpioDriver.a  lib/zephyr/libZephyr_Drv_ZephyrRateDriver.a  lib/zephyr/libDrv_Ports.a  lib/zephyr/libZephyr_Drv_ZephyrUartDriver.a  lib/zephyr/libSvc_ActiveLogger.a  lib/zephyr/libSvc_Fatal.a  lib/zephyr/libSvc_AssertFatalAdapter.a  lib/zephyr/libSvc_CmdDispatcher.a  lib/zephyr/libSvc_Deframer.a  lib/zephyr/libSvc_Framer.a  lib/zephyr/libDrv_ByteStreamDriverModel.a  lib/zephyr/libSvc_FramingProtocol.a  lib/zephyr/libUtils_Types.a  lib/zephyr/libFw_Ports_SuccessCondition.a  lib/zephyr/libSvc_PassiveConsoleTextLogger.a  lib/zephyr/libSvc_PassiveRateGroup.a  lib/zephyr/libSvc_RateGroupDriver.a  lib/zephyr/libSvc_Cycle.a  lib/zephyr/libSvc_StaticMemory.a  lib/zephyr/libSvc_SystemResources.a  lib/zephyr/libSvc_TlmChan.a  lib/zephyr/libSvc_Sched.a  lib/zephyr/libSvc_Ping.a  lib/zephyr/libFw_CompQueued.a  lib/zephyr/libFw_Comp.a  lib/zephyr/libOs.a  lib/zephyr/libOs_File_Common.a  lib/zephyr/libUtils_Hash.a  lib/zephyr/libOs_Cpu_Common.a  lib/zephyr/libOs_Memory_Common.a  lib/zephyr/libOs_Queue_Common.a  lib/zephyr/libOs_Mutex_Common.a  lib/zephyr/libOs_Task_Common.a  lib/zephyr/libOs_Console_Common.a  lib/zephyr/libOs_RawTime_Common.a  lib/zephyr/libFw_Buffer.a  lib/zephyr/libFw_Prm.a  lib/zephyr/libFw_Cmd.a  lib/zephyr/libFw_Log.a  lib/zephyr/libFw_Tlm.a  lib/zephyr/libFw_Com.a  lib/zephyr/libFw_Time.a  lib/zephyr/libFw_Port.a  lib/zephyr/libFw_Obj.a  lib/zephyr/libFw_Logger.a  lib/zephyr/libFw_Types.a  lib/zephyr/libFw_Cfg.a  lib/zephyr/libconfig.a  zephyr/kernel/libkernel.a  lib/zephyr/libOs_Zephyr_Shared.a  -mcpu=cortex-m7  -mthumb  -mabi=aapcs  -mfpu=fpv5-d16  -mfloat-abi=hard  -mfp16-format=ieee  -fuse-ld=bfd  -Wl,--gc-sections  -Wl,--build-id=none  -Wl,--no-relax  -Wl,--sort-common=descending  -Wl,--sort-section=alignment  -Wl,-u,_OffsetAbsSyms  -Wl,-u,_ConfigAbsSyms  -nostdlib  -static  -Wl,-X  -Wl,-N  -Wl,--orphan-handling=warn  -Wl,-no-pie  -L"/home/user/zephyr-sdk-0.17.0/arm-zephyr-eabi/arm-zephyr-eabi"/lib/thumb/v7e-m+dp/hard && cd /fprime-zephyr-reference/build/LedBlinker && /usr/bin/cmake -DCMAKE_INSTALL_COMPONENT=LedBlinker -P /fprime-zephyr-reference/build/cmake_install.cmake
/home/user/zephyr-sdk-0.17.0/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/../../../../arm-zephyr-eabi/bin/ld.bfd: warning: cannot find entry symbol _start; defaulting to 0000000000008000
/home/user/zephyr-sdk-0.17.0/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/../../../../arm-zephyr-eabi/bin/ld.bfd: lib/zephyr/libOs_Task_Common.a(Task.cpp.obj): in function `_GLOBAL__sub_I__ZN2Os13TaskInterface9ArgumentsC2ERKN2Fw10StringBaseEPFvPvES6_jjjj':
/fprime-zephyr-reference/fprime/Os/Task.cpp:54: undefined reference to `Os::Mutex::Mutex()'
/home/user/zephyr-sdk-0.17.0/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/../../../../arm-zephyr-eabi/bin/ld.bfd: lib/zephyr/libOs_Task_Common.a(Task.cpp.obj): in function `__static_initialization_and_destruction_0':
/fprime-zephyr-reference/fprime/Os/Task.cpp:54: undefined reference to `__dso_handle'
/home/user/zephyr-sdk-0.17.0/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/../../../../arm-zephyr-eabi/bin/ld.bfd: /fprime-zephyr-reference/fprime/Os/Task.cpp:54: undefined reference to `Os::Mutex::~Mutex()'
/home/user/zephyr-sdk-0.17.0/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/../../../../arm-zephyr-eabi/bin/ld.bfd: /fprime-zephyr-reference/fprime/Os/Task.cpp:54: undefined reference to `__aeabi_atexit'
/home/user/zephyr-sdk-0.17.0/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/../../../../arm-zephyr-eabi/bin/ld.bfd: bin/zephyr/LedBlinker: hidden symbol `__dso_handle' isn't defined
/home/user/zephyr-sdk-0.17.0/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/../../../../arm-zephyr-eabi/bin/ld.bfd: final link failed: bad value

It seems as though the executable must be the zephyr executable and then use the fprime build as a library.

I looked a bit into the "How-To: Develop an F´ Library" but it doesn't really seem applicable for this case where we want to expose the deployment as a library.

If there's any other suggestions here I'd appreciate it.