* cygcheck.cc (dirname): New static function.

(find_app_on_path): Use SYMLINK_MAX.  Resolve symlink relative
	to link's location.  Adjust to the fact that cygpath already
	normalizes its return value.
	* path.cc (rel_vconcat): Add cwd parameter, and use it instead
	of calling GetCurrentDirectory() if possible.  Rename throughout.
	(vcygpath): Rename from cygpath and accept cwd and va_list.  Pass
	cwd on to rel_vconcat().
	(cygpath_rel): New front end for vcygpath.
	(cygpath): Ditto.
	* path.h (cygpath_rel): Declare.
	(SYMLINK_MAX): Define to 4095.

winsup/utils/path.h

@@ -9,9 +9,11 @@ Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
 details. */
 
 char *cygpath (const char *s, ...);
+char *cygpath_rel (const char *cwd, const char *s, ...);
 bool is_exe (HANDLE);
 bool is_symlink (HANDLE);
 bool readlink (HANDLE, char *, int);
 int get_word (HANDLE, int);
 int get_dword (HANDLE, int);
 
+#define SYMLINK_MAX 4095  /* PATH_MAX - 1 */