-#if defined(__GNUC__) && defined(_FORTIFY_SOURCE)
-#define IGNORE_RC(func) errno = (int) func
-#else
-#define IGNORE_RC(func) (void) func
-#endif /* gcc workarounds */
-
-/* usually in <unistd.h> */
-#ifndef STDIN_FILENO
-#define STDIN_FILENO 0
-#endif
-
-#ifndef STDOUT_FILENO
-#define STDOUT_FILENO 1
-#endif
-
-#ifndef STDERR_FILENO
-#define STDERR_FILENO 2
-#endif
-
-#ifndef EXIT_SUCCESS
-#define EXIT_SUCCESS 0
-#endif
-
-#ifndef EXIT_FAILURE
-#define EXIT_FAILURE 1
-#endif
-
-#ifndef R_OK
-#define R_OK 4 /* Test for readable. */
-#endif
-
-#ifndef W_OK
-#define W_OK 2 /* Test for writable. */
-#endif
-
-#ifndef X_OK
-#define X_OK 1 /* Test for executable. */
-#endif
-
-#ifndef F_OK
-#define F_OK 0 /* Test for existence. */
-#endif
-
-/* usually in <unistd.h> */
-#ifndef STDOUT_FILENO
-#define STDOUT_FILENO 1
-#endif
-
-#ifndef STDERR_FILENO
-#define STDERR_FILENO 2
-#endif
-
-/* may be in limits.h, included from various places */
-#ifndef PATH_MAX
-# if defined(_POSIX_PATH_MAX)
-# define PATH_MAX _POSIX_PATH_MAX
-# elif defined(MAXPATHLEN)
-# define PATH_MAX MAXPATHLEN
-# else
-# define PATH_MAX 255 /* the Posix minimum pathsize */
-# endif
-#endif
-