KDevelop does not recognize this variadic macro:

#define LOG_ERROR(fmt, args... ) fprintf(stderr, fmt, ##args);

Specifically, the parser appears to be confused by the space between "..." and ")". This is reproducible with other, similar macros, following the same pattern:
  no space => macro is recognized
  space => macro is not recognized

Non-variadic macros with spaces in the declaration are recognized as expected.

Reproducible: Always