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cgcc-warning

How to silence GCC pedantic (-Wpedantic) warning regarding __FUNCTION__

I am printing out (printf) the name of the function as I enter it by using the "__FUNCTION__" predefined macro (in gcc and clang). However, if I use -Wpedantic, I get this warning:

warning: ISO C does not support ‘__FUNCTION__’ predefined identifier [-Wpedantic]

How do I silence that warning?

Solution

  • The standard compliant function identifier is __func__

    From §6.4.2.2 of the C11 specification

    The identifier __func__ shall be implicitly declared by the translator as if, immediately following the opening brace of each function definition, the declaration
    static const char __func__[] = "function-name";
    appeared, where function-name is the name of the lexically-enclosing function.

    I believe that __func__ was added in C99.