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vsnprintf() giving function declared implicitly

Santosh Pinto
Expert 1010 points

Hello,

Im using vsnprintf() in my application code and ive included

#include <xdc/std.h>
#include <xdc/runtime/System.h> in my code.

Im using DSP SYS/BIOS 6.

On compilation , i get the warning : : function declared implicitly

Please let me know the reason for this warning and how can i remove this warning ,.

 

Thanks

Santosh

 

 

 

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  • 0
    TI__Guru**** 173310 points

    The warning appears when a function does not have a prototype, in which case the compiler will make assumptions about the data types for function arguments and return values.

    Try including <stdio.h> to get rid of the warning.

  • 0
    TI__Guru* 84225 points

    Are you compiling in C++ mode?

  • 0 in reply to Archaeologist
    Expert 1715 points

    I've just run into this and I guess I need a fuller answer than did the original poster.

    We're still using the v1.3.2 of the TI BLE stack so we're still running IAR 8.10.1.

    I see that the normal IAR stdio.h header file DOESN'T include definitions for snprintf() and vsnprintf(), just the "non-n" versions.

    I see that the dlib (Dinkum Library?) version of stdio.h DOES include definitions for snprintf() and vsnprintf().

    How do I use that version of the library routines (and header files)? And what other effects will that have on my program? It doesn't look like I can just switch the compilation mode from "C" to "C++"; that creates tons of diagnostic messages (many from the TI header files) and seemingly still doesn't include definitions for snprintf() and vsnprintf() because the original error is still there, just in different words.

  • 0 in reply to Atlant Schmidt
    TI__Guru**** 244300 points

    Atlant Schmidt said:
    so we're still running IAR 8.10.1.

    We who watch this forum have no expertise with the IAR compiler, and are unable to help you with your question.  You are asking good questions, I just don't have any answers.  I'm not sure if they discuss the IAR compiler in the MSP430 forum, but they might.

    Thanks and regards,

    -George

  • 0 in reply to George Mock
    Expert 1715 points

    George:

    Apologies! I didn't realize that the search that I had done to find this thread had "left" the Bluetooth/RF forum (where they definitely do use IAR).

    I'll re-post over there.

    Atlant