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Code in interrupts causing linker error {linker} invalid symbol type - for '$cb$rp'

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  • Code in interrupts causing linker error {linker} invalid symbol type - for '$cb$rp'

    Hi, we are trying to add some interrupt code for a timer interrupt. Below is the error and the code we are trying to compile. This is using Windows 10 64 bit. Thanks

    ||=== Build: default in Rastrum (compiler: ImageCraft AVR Compiler) ===|
    ||{linker} invalid symbol type - for '$cb$rp'|
    ||=== Build failed: 1 error(s), 0 warning(s) (0 minute(s), 0 second(s)) ===|

    #pragma interrupt_handler timer0_ovf_isr:iv_TIM0_OVF
    void timer0_ovf_isr(void)
    TCNT0 = 0x06; //reload counter value

    if (ms_timer>0) {

    Also, on another topic, the C compiler shows the version as 8.27 while we have 8.28 installed.

  • #2
    What version are you using? I believe a similar bug has been fixed in the latest version.


    • #3
      Thanks Richard. Yes, I am using the latest version but when it runs, it looks like the C compiler is still v8.27. Is it possible to just update the C compiler only? Thanks

      Below is the build log.

      -------------- Build: default in Rastrum (compiler: ImageCraft AVR Compiler)---------------

      iccavr.exe -c -e -D_EE_EXTIO -D_3BYTE_PC -DATMega2560 -l -g -MExtended -MLongJump -MHasMul -MEnhanced -Wf-str_in_flash -Wf-use_elpm -Wf-const_is_flash -DCONST="" -D__BUILD=27 -D__ICC_VERSION=82700 C:\_projects\Boost\Firmware\Rastrum\rp-ints.c -o .\.objs\rp-ints.o
      iccavr.exe -o .\Rastrum .\.objs\rp-ints.o .\.objs\rp-main.o .\.objs\rp-serial.o .\.objs\rp-start.o .\.objs\rp-stdcalls.o -mATMega2560 -g -e:0x40000 -xcall -ucrtatmega.o -bfunc_lit:0xe4.0x40000 -dram_end:0x21ff -bdata:0x200.0x21ff -dhwstk_size:32 -beeprom:0.4096 -fihx_coff -S2 -nb:27 -lcatm256
      !E {linker} invalid symbol type - for '$cb$rp'
      Built with ICCAVR PRO V8.27.00. Mon May 21 13:57:10 2018
      iccavr.exe: 'C:\iccv8avr\bin\ilinkavr.exe' returns error code -1
      Process terminated with status -1 (0 minute(s), 2 second(s))
      Build Failed: 1 error(s), 0 warning(s) (0 minute(s), 2 second(s))


      • #4
        Fergus, send me the project and I will check it out. As I recall, it has something to do with code compressor must be disabled for interrupt handlers (which I added), but maybe this is another instance.


        • #5
          OK, thanks Richard. I have just emailed The project is very simple at this stage. Thanks


          • #6
            Attached is the project. I have now tried on 3 computers - 2 with Windows 10 and one with Windows 7 and the error persists.
            Attached Files


            • #7
              I can duplicate the problem. Stay tuned.



              • #8
                Fixed in 8.28.02