diff -urp global-6.5/global/global.c global-6-5/global/global.c
--- global-6.5/global/global.c	2015-06-10 11:45:07 +1000
+++ global-6-5/global/global.c	2015-06-12 21:35:49 +1000
@@ -53,6 +53,29 @@
 #include "literal.h"
 #include "convert.h"
 
+/*
+ * ensure GTAGSLIBPATH compares correctly
+ */
+#if defined(_WIN32) || defined(__DJGPP__)
+#define STRCMP stricmp
+#define back2slash(sb) do {		\
+	char *p = strbuf_value(sb);	\
+	for (; *p; p++) 		\
+		if (*p == '\\')         \
+			*p = '/';       \
+} while (0)
+#else
+#define STRCMP strcmp
+#define back2slash(sb)
+#endif
+
+/*
+ * enable [set] globbing, if available
+ */
+#ifdef __CRT_GLOB_BRACKET_GROUPS__
+int _CRT_glob = __CRT_GLOB_USE_MINGW__ | __CRT_GLOB_BRACKET_GROUPS__;
+#endif
+
 /**
  * @file global.c
  * @NAME{global} - print locations of the specified object.
@@ -339,12 +362,13 @@ finish:
 
 		sb = strbuf_open(0);
 		strbuf_puts(sb, getenv("GTAGSLIBPATH"));
+		back2slash(sb);
 		for (libdir = strbuf_value(sb); libdir; libdir = nextp) {
 			 if ((nextp = locatestring(libdir, PATHSEP, MATCH_FIRST)) != NULL)
                                 *nextp++ = 0;
 			if (!gtagsexist(libdir, libdbpath, sizeof(libdbpath), 0))
 				continue;
-			if (!strcmp(dbpath, libdbpath))
+			if (!STRCMP(dbpath, libdbpath))
 				continue;
 			dbop = dbop_open(makepath(libdbpath, dbname(GTAGS), NULL), 0, 0, 0);
 			if (dbop == NULL)
@@ -997,15 +1021,16 @@ completion(const char *dbpath, const cha
 		char *libdir, *nextp = NULL;
 
 		strbuf_puts(sb, getenv("GTAGSLIBPATH"));
+		back2slash(sb);
 		/*
-		* search for each tree in the library path.
-		*/
+		 * search for each tree in the library path.
+		 */
 		for (libdir = strbuf_value(sb); libdir; libdir = nextp) {
 			if ((nextp = locatestring(libdir, PATHSEP, MATCH_FIRST)) != NULL)
 				*nextp++ = 0;
 			if (!gtagsexist(libdir, libdbpath, sizeof(libdbpath), 0))
 				continue;
-			if (!strcmp(dbpath, libdbpath))
+			if (!STRCMP(dbpath, libdbpath))
 				continue;
 			if (!test("f", makepath(libdbpath, dbname(db), NULL)))
 				continue;
@@ -1788,6 +1813,7 @@ tagsearch(const char *pattern, const cha
 		char *libdir, *nextp = NULL;
 
 		strbuf_puts(sb, getenv("GTAGSLIBPATH"));
+		back2slash(sb);
 		/*
 		 * search for each tree in the library path.
 		 */
@@ -1796,7 +1822,7 @@ tagsearch(const char *pattern, const cha
 				*nextp++ = 0;
 			if (!gtagsexist(libdir, libdbpath, sizeof(libdbpath), 0))
 				continue;
-			if (!strcmp(dbpath, libdbpath))
+			if (!STRCMP(dbpath, libdbpath))
 				continue;
 			if (!test("f", makepath(libdbpath, dbname(db), NULL)))
 				continue;
diff -urp global-6.5/gtags/gtags.c global-6-5/gtags/gtags.c
--- global-6.5/gtags/gtags.c	2015-06-10 11:45:07 +1000
+++ global-6-5/gtags/gtags.c	2015-06-12 21:35:49 +1000
@@ -56,6 +56,13 @@
 #include "parser.h"
 #include "const.h"
 
+/*
+ * enable [set] globbing, if available
+ */
+#ifdef __CRT_GLOB_BRACKET_GROUPS__
+int _CRT_glob = __CRT_GLOB_USE_MINGW__ | __CRT_GLOB_BRACKET_GROUPS__;
+#endif
+
 /**
  @file
  @NAME{gtags} - create tag files for @NAME{global}.
diff -urp global-6.5/libutil/abs2rel.c global-6-5/libutil/abs2rel.c
--- global-6.5/libutil/abs2rel.c	2015-06-10 11:45:09 +1000
+++ global-6-5/libutil/abs2rel.c	2015-06-12 22:10:31 +1000
@@ -38,6 +38,11 @@
 #include "path.h"
 #if defined(_WIN32) || defined(__DJGPP__)
 #include "checkalloc.h"
+#define LOCATEFLAG MATCH_AT_FIRST|IGNORE_CASE
+#define PATHCHAR(c) tolower(c)
+#else
+#define LOCATEFLAG MATCH_AT_FIRST
+#define PATHCHAR(c) c
 #endif
 
 #define COLOR_PATH
@@ -217,9 +222,9 @@ normalize(const char *path, const char *
 	 *      rootdir  /a/b/
 	 *      path     /a/b/c/d.c -> c/d.c -> ./c/d.c
 	 */
-	p = locatestring(abs, root, MATCH_AT_FIRST);
+	p = locatestring(abs, root, LOCATEFLAG);
 	if (p == NULL) {
-		p = locatestring(root, abs, MATCH_AT_FIRST);
+		p = locatestring(root, abs, LOCATEFLAG);
 		/*
 		 * abs == /usr/src should be considered to be equal to root == /usr/src/.
 		 */
@@ -402,7 +407,7 @@ abs2rel(const char *path, const char *ba
 				die("invalid escape sequence in the path. '%s'", path);
 		}
 #endif
-		if (*pp != *bp)
+		if (PATHCHAR(*pp) != PATHCHAR(*bp))
 			break;
 		if (*pp == '/')
 			branch = pp;