cppc V2.21.0 - warning suppress not working

[Derell Licht]

I am getting the following error message:

der_libs\common_win.cpp:274:4: error: There is an unknown macro here somewhere. Configuration is required. If _T is a macro then please configure it. [unknownMacro]
   _T("Text Files (*.TXT)\0*.txt\0") /* cppcheck-suppress [unknownMacro] */ \
   ^

I am including tchar.h in my file, so cppcheck shouldn't be confused about this, but in any case, I'm trying to exclude this error via:

static TCHAR const szPalFilter[] = 
    // cppcheck-suppress [unknownMacro]
   _T("Text Files (*.TXT)\0*.txt\0") /* cppcheck-suppress [unknownMacro] */ \
   _T("All Files (*.*)\0*.*\0\0") ;

However, neither of these suppress statements remove the message. Is that because it is an error rather than a warning??

BTW, the file compiles with no warnings, using -Wall ...

[CHR]

Probably the path to tchar.h is not known to cppcheck. Rather than including that system header in the analysis, you should pass --library=windows --platform=win64, assuming you don't already.