How to include threadx in the project via CMake system?

[MaJerle]

Is this request related to a particular hardware platform, SoC, board? Please describe. There is a CMake build system supported in the system. Typically something like below is to be added in the project folder, that will include the Cortex-M33 version of ThreadX in the project:

set(THREADX_ARCH "cortex_m33")
set(THREADX_TOOLCHAIN "gnu")
add_subdirectory("../../lib/threadx" threadx)
target_link_libraries(${CMAKE_PROJECT_NAME} threadx)

Describe why you are asking for this support? Problem arises, that ARM GCC will throw errors for *.s files compilation, complaining about thumb. CMake compile_commands.json does not show any sign of global project compiler flags being added to the threadx files.

So how do we correctly add -thumb flags to the threadx compiled files, w/o breaking the current structure? I'm using latest image of the repository.

I guess we are missing something like:

set(THREADX_ARCH "cortex_m33")
set(THREADX_TOOLCHAIN "gnu")
set(THREADX_COMPILE_OPTIONS "....")             # <- this line
add_subdirectory("../../lib/threadx" threadx)
target_link_libraries(${CMAKE_PROJECT_NAME} threadx)

That will then add the values to the target_compile_options of threadx module.

[MaJerle]

Furthermore, when researching why I cannot get pass tx_semaphore_create function, I noticed that sizeof(TX_SEMAPHORE) in the app wasn't the same as sizeof(TX_SEMAPHORE) inside threadx library. One was 28, another was 32.

A trick is that file tx_user.h, that is in the user application folder, outside threadx library, isn't visible to the compilation unit of threadx and therefore doesn't take into account all user settings.

In the TX_SEMAPHORE structure, there is this part:

#ifndef TX_DISABLE_NOTIFY_CALLBACKS

    /* Define the application callback routine used to notify the application when
       the a message is sent to the queue.  */
    VOID                (*tx_queue_send_notify)(struct TX_QUEUE_STRUCT *queue_ptr);
#endif

Macro TX_DISABLE_NOTIFY_CALLBACKS is normally defined in the tx_user.h file, but this one is NOT visible to the compilation unit of threadx, if we use the current ThreadX CMake system.

What's the trick here, to make it happen correctly?

Thanks

[xray-bit]

Hi, @MaJerle . You can do it just like this:

set(THREADX_ARCH cortex_m33)
set(THREADX_TOOLCHAIN gnu)
add_subdirectory(threadx)
target_compile_options(threadx PRIVATE
    -mthumb
    # other compile options
)
target_link_libraries(${EXECUTABLE} threadx)