[SOLVED] SEGGER_RTT_Conf.h build failure on clang

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  • [SOLVED] SEGGER_RTT_Conf.h build failure on clang

    I am in the process of moving my project from gcc to clang. I am using RTT. Everything builds fine except the SEGGER_RTT_LOCK(); macro from SEGGER_RTT_Conf.h (the code will build cleanly when I change that macro to empty).

    The header is marked with Revision: $Rev: 13430 $.

    Build command: clang -o build_output/build/my_project_standalone.elf//my/project/path/libs/RTT/SEGGER_RTT.o -c -MD --target=arm-none-eabi -nostdlib --sysroot=/opt/toolchains/gcc-arm-none-eabi-9-2019-q4-major/bin/../arm-none-eabi -fshort-enums -mcpu=cortex-m0 -mthumb -mfloat-abi=soft -g3 -I ../libs/CMSIS -I ../libs/RTT -I ../libs/ -Oz -std=gnu11 -Wall -pipe -ffunction-sections -fdata-sections -I/my/project/path/libs/libs/RTT /my/project/path/libs/RTT/SEGGER_RTT.c

    Error message (repeated every time the macro is called):

    C Source Code

    1. /my/project/path/libs/RTT/SEGGER_RTT.c:722:3: error: invalid instruction, any one of the following would fix this:
    2. SEGGER_RTT_LOCK();
    3. ^
    4. ../libs/RTT/SEGGER_RTT_Conf.h:133:73: note: expanded from macro 'SEGGER_RTT_LOCK'
    5. __asm volatile ("mrs %0, primask \n\t" \
    6. ^
    7. <inline asm>:2:2: note: instantiated into assembly here
    8. movs r1, $1
    9. ^
    10. /my/project/path/libs/RTT/SEGGER_RTT.c:722:3: note: operand must be an immediate in the range [0,255]
    11. SEGGER_RTT_LOCK();
    12. ^
    13. ../libs/RTT/SEGGER_RTT_Conf.h:133:73: note: expanded from macro 'SEGGER_RTT_LOCK'
    14. __asm volatile ("mrs %0, primask \n\t" \
    15. ^
    16. <inline asm>:2:12: note: instantiated into assembly here
    17. movs r1, $1
    18. ^
    19. /my/project/path/libs/RTT/SEGGER_RTT.c:722:3: note: operand must be a register in range [r0, r7]
    20. SEGGER_RTT_LOCK();
    21. ^
    22. ../libs/RTT/SEGGER_RTT_Conf.h:133:73: note: expanded from macro 'SEGGER_RTT_LOCK'
    23. __asm volatile ("mrs %0, primask \n\t" \
    24. ^
    25. <inline asm>:2:12: note: instantiated into assembly here
    26. movs r1, $1
    27. ^
    Display All



    My compiler

    Shell-Script

    1. $ clang --version
    2. clang version 13.0.0
    3. Target: x86_64-pc-linux-gnu
    4. Thread model: posix
    5. InstalledDir: /usr/lib/llvm/13/bin
    6. $ llc --version
    7. LLVM (http://llvm.org/):
    8. LLVM version 13.0.0
    9. Optimized build.
    10. Default target: x86_64-pc-linux-gnu
    11. Host CPU: haswell
    13. Registered Targets:
    14. amdgcn - AMD GCN GPUs
    15. arm - ARM
    16. armeb - ARM (big endian)
    17. bpf - BPF (host endian)
    18. bpfeb - BPF (big endian)
    19. bpfel - BPF (little endian)
    20. nvptx - NVIDIA PTX 32-bit
    21. nvptx64 - NVIDIA PTX 64-bit
    22. r600 - AMD GPUs HD2XXX-HD6XXX
    23. thumb - Thumb
    24. thumbeb - Thumb (big endian)
    25. x86 - 32-bit X86: Pentium-Pro and above
    26. x86-64 - 64-bit X86: EM64T and AMD64
    Display All

    Thanks for help.

  • Hello,

    Thank you for your inquriy.
    This is simply an old version of the RTT files.
    We always recommend to the latest RTT files.
    Currently we are on Rev. 24316

    You can find them in your J-Link software installation folder under Samples/RTT
    The latest software version can be found here:
    segger.com/downloads/jlink/

    Best regards,
    Nino
    Please read the forum rules before posting.

    Keep in mind, this is *not* a support forum.
    Our engineers will try to answer your questions between their projects if possible but this can be delayed by longer periods of time.
    Should you be entitled to support you can contact us via our support system: segger.com/ticket/
    Or you can contact us via e-mail.