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Using predefined preprocessor symbols in linker command file

Ashish Sadanandan
Prodigy 50 points

I'm trying to use the __TI_COMPILER_VERSION__ preprocessor symbol in my linker command file. The section looks like this:

#if __TI_COMPILER_VERSION__ > 6000000
  /* do something */
#else
  /* do something else */
#endif

I keep getting this warning

warning #19014-D: undefined preprocessor symbol '__TI_COMPILER_VERSION__'

and linking fails when building with CCSv5.3 (code gen tools v6.1.3) because the linker attempts to execute the else part. Is it not possible to use any of the predefined symbols? Does it have to be a user defined symbol?

  • 0
    TI__Guru**** 253190 points

    I presume you are using the C28x tools.  Please see the last part of the section titled Link Command File Preprocessing in the C28x assembly tools manual.  The symbol __TI_COMPILER_VERSION__ is not predefined.

    Thanks and regards,

    -George

  • 0 in reply to George Mock
    Prodigy 50 points

    Hi George,

    Thanks, that answers my question (even though it's not what I wanted to hear). Is there any option to do conditional preprocessing in the linker command file other than a user-defined symbol?

    The __TI_COMPILER_VERSION__ symbol was ideal for my use case since I was trying to maintain the same linker command file between CCSv3.3 and CCSv5.3 (I need this since the current working directory from the compiler's point of view has changed between the two versions).

  • 0 in reply to Ashish Sadanandan
    TI__Guru**** 253190 points

    Ashish Sadanandan said:
    Is there any option to do conditional preprocessing in the linker command file other than a user-defined symbol?

    No.  But you could do something like this ...

    #ifndef CMD_LINE_VAR
    #error CMD_LINE_VAR must be defined
    #endif

    This requires that --define=CMD_LINE_VAR must appear among the linker options.

    Not quite as smooth as a compiler predefined symbol.  But when someone makes a mistake, they know about it right away.

    Thanks and regards,

    -George