#define FNM_NOESCAPE (1 << 1) /* Backslashes don't quote special chars. */
#define FNM_PERIOD (1 << 2) /* Leading `.' is matched only explicitly. */
-#if !defined _POSIX_C_SOURCE || _POSIX_C_SOURCE < 2 || defined _GNU_SOURCE
+#ifndef FNM_FILE_NAME
# define FNM_FILE_NAME FNM_PATHNAME /* Preferred GNU name. */
+#endif
+#ifndef FNM_LEADING_DIR
# define FNM_LEADING_DIR (1 << 3) /* Ignore `/...' after a match. */
+#endif
+#ifndef FNM_CASEFOLD
# define FNM_CASEFOLD (1 << 4) /* Compare without regard to case. */
#endif