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EmbeddedSystemsEngineer
Associate
Mar 26, 2024 2:32 PM UTC
Solved

STM32CubeIDE to version 1.15.0: (.text._getentropy_r+0xe): warning: _getentropy is not implemented

Beside an already solved warning (.elf has a LOAD segment with RWX permissions),

after updating the STM32CubeIDE to version 1.15.0 I am observing the second warning below:

C:\ProgramFiles\STMicroelectronics\STM32Cube\STM32CubeIDE_1.15.0\STM32CubeIDE\plugins\com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.12.3.rel1.win32_1.0.100.202403111256\tools\arm-none-eabi\bin\ld.exe: C:/Program Files/STMicroelectronics/STM32Cube/STM32CubeIDE_1.15.0/STM32CubeIDE/plugins/com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.12.3.rel1.win32_1.0.100.202403111256/tools/bin/../lib/gcc/arm-none-eabi/12.3.1/../../../../arm-none-eabi/lib/thumb/v7e-m+fp/hard\libc.a(libc_a-getentropyr.o): in function `_getentropy_r':

(.text._getentropy_r+0xe): warning: _getentropy is not implemented and will always fail

 

In those C++ projects I’m retargeting std::cout from iostream to the serial line. But the same problem comes up,
when I’m retargeting printf from cstdio or stdio.

Are there any ideas to solve the problem?

    This topic has been closed for replies.
    EmbeddedSystemsEngineerBest answer
    Associate
    Mar 27, 2024 7:03 AM UTC

    Hi Pavel A.,

    thanks for your fast feedback and solution!

    (With parameter type void* instead of void for buffer[] it works fine.)

    Is this topic only related to C++ projects, because I tried also to rebuild some C projects, where I didn't get this warning?

     

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    4 replies

    Pavel A.
    Pavel A.
    Mar 26, 2024 3:23 PM UTC

     It is not related to printf or stdio. Add it somewhere with other "syscall" stubs.

    int getentropy(void buffer[], size_t length)
{
 buffer = buffer; length = length;
 return -ENOSYS;
}

     

      EmbeddedSystemsEngineerAuthorBest answer
      Associate
      Mar 27, 2024 7:03 AM UTC

      Hi Pavel A.,

      thanks for your fast feedback and solution!

      (With parameter type void* instead of void for buffer[] it works fine.)

      Is this topic only related to C++ projects, because I tried also to rebuild some C projects, where I didn't get this warning?

       

        Pavel A.
        Pavel A.
        Mar 28, 2024 4:23 PM UTC

        @EmbeddedSystemsEngineer this can be used in any C or C++ project where a real getentropy function is not needed. Various versions of C or C++ runtime libraries may refer to getentropy or not.

        EmbeddedSystemsEngineerAuthor
        Associate
        Apr 2, 2024 6:15 AM UTC

        Hi Pavel A.,

        Thank you for the answer!

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