Function error

tests/ktxdiff/ktxdiff_main.cpp:129–132

template <typename... Args>
void error(int return_code, Args&&... args) {
    fmt::print(std::cerr, std::forward<Args>(args)...);
    std::exit(return_code);
}

[[nodiscard]] inline std::string errnoMessage() {
    return std::make_error_code(static_cast<std::errc>(errno)).message();