undefined reference error in example code for simple debugging

[nullptrdesaster]

Hi @boarchuz, compiling named code returns with an error:

main.cpp:51: undefined reference to `hulp_debug_bp_init(hulp_debug_bp_config_t const*, hulp_debug_bp_state_t**)'

as the definition in "hulp_debug.h" asks for two arguments:

esp_err_t hulp_debug_bp_init(const hulp_debug_bp_config_t config, hulp_debug_bp_handle_t handle = nullptr);

I am not comfortable with cpp-coding, so I kindly ask for confirmation and your help.

[boarchuz]

@nullptrdesaster I just tried it here and I'm not getting any errors with the example (though the debugging stuff is a bit neglected so please let me know if you have any other issues too). That declaration uses C++ default arguments (https://en.cppreference.com/w/cpp/language/default_arguments) so it should be fine with just the config argument provided.

Have you downloaded/cloned HULP into the 'components' subdirectory of your project? If that's not it could you share more of the build output as well as your project directory tree?

[nullptrdesaster]

Thanks for your time .. Yes, I moved HULP into a platformio project and I'm a bit struggling with it's structure/concept. There is a folder " ./.pio/build/debug/bootloader/bootloader/subproject/components" with subfolder "micro-ecc/" and a single file "uECC_verify_antifault.o" in it. My platformio source directory has a hulp/src/CMakeLists.txt which should register components. As I have the "hulp_debug.h" and friends in the "hulp/include" folder, it contains: "idf_component_register(SRCS "main.cpp" "hulp.cpp" INCLUDE_DIRS "../include")" Do you think, this might be wrong?

[boarchuz]

That doesn't seem quite right. Check the PlatformIO docs here for adding a component: https://docs.platformio.org/en/latest/frameworks/espidf.html#esp-idf-components specifically this:

By adding a new component to an optional folder called components in the root of your project

So you should create the components folder if it doesn't already exist and clone HULP such that this path exists: [project_dir]/components/HULP/src/hulp.cpp

To use the debugging example, then copy examples/Debugging/Simple/main.cpp to [project_dir]/src/main.cpp and ensure there is a basic CMakeLists.txt alongside it like this: idf_component_register(SRCS "main.cpp")

[nullptrdesaster]

YES. I did as advised, now it compiles as supposed. Many thanks, now I'll dive deeper in your very interesting project.