Comes up w/ recent Clang: ``` libxcf/xcf.c:49:67: warning: token pasting of ',' and __VA_ARGS__ is a GNU extension [-Wgnu-zero-variadic-macro-arguments] 49 | #define PRINT_ERROR(msg, ...) fprintf(stderr, "[libxcf] " msg "\n", ##__VA_ARGS__) | ^ ```