hidden void __getopt_msg(const char *, const char *, const char *, size_t);
#define feof(f) ((f)->flags & F_EOF)
#define ferror(f) ((f)->flags & F_ERR)
#define getc_unlocked(f) \
hidden void __getopt_msg(const char *, const char *, const char *, size_t);
#define feof(f) ((f)->flags & F_EOF)
#define ferror(f) ((f)->flags & F_ERR)
#define getc_unlocked(f) \