From FreeBSD:

1) Add support for FNM_LEADING_DIR, FNM_CASEFOLD, FNM_IGNORECASE
2) POSIX.2 fixes

src/include/fnmatch.h

@@ -1,4 +1,4 @@
-/*	$OpenBSD: fnmatch.h,v 1.2 1997/09/21 10:45:33 niklas Exp $	*/
+/*	$OpenBSD: fnmatch.h,v 1.3 1997/09/22 05:03:30 millert Exp $	*/
 /*	$NetBSD: fnmatch.h,v 1.5 1994/10/26 00:55:53 cgd Exp $	*/
 
 /*-
@@ -44,6 +44,11 @@
 #define	FNM_NOESCAPE	0x01	/* Disable backslash escaping. */
 #define	FNM_PATHNAME	0x02	/* Slash must be matched by slash. */
 #define	FNM_PERIOD	0x04	/* Period must be matched by period. */
+#ifndef _POSIX_SOURCE
+#define	FNM_LEADING_DIR	0x08	/* Ignore /<tail> after Imatch. */
+#define	FNM_CASEFOLD	0x10	/* Case insensitive search. */
+#define	FNM_IGNORECASE	FNM_CASEFOLD
+#endif
 
 #include <sys/cdefs.h>