case insensitive file system location support provided by locale only
diff --git a/src/os/unix/ngx_files.h b/src/os/unix/ngx_files.h
index a223b34..0c080c4 100644
--- a/src/os/unix/ngx_files.h
+++ b/src/os/unix/ngx_files.h
@@ -19,6 +19,8 @@
 
 #ifdef __CYGWIN__
 
+#define NGX_HAVE_CASELESS_FILESYSTEM  1
+
 #define ngx_open_file(name, mode, create, access)                            \
     open((const char *) name, mode|create|O_BINARY, access)
 
@@ -103,6 +105,16 @@
 #define ngx_file_uniq(sb)        (sb)->st_ino
 
 
+#if (NGX_HAVE_CASELESS_FILESYSTEM)
+
+#define ngx_filename_cmp(s1, s2, n)  strncasecmp((char *) s1, (char *) s2, n)
+
+#else
+
+#define ngx_filename_cmp         ngx_memcmp
+
+#endif
+
 
 #define ngx_getcwd(buf, size)    (getcwd(buf, size) != NULL)
 #define ngx_getcwd_n             "getcwd()"
diff --git a/src/os/win32/ngx_files.h b/src/os/win32/ngx_files.h
index 5f92641..0c4e14f 100644
--- a/src/os/win32/ngx_files.h
+++ b/src/os/win32/ngx_files.h
@@ -123,6 +123,9 @@
                                           - 116444736000000000) / 10000000)
 
 
+#define ngx_filename_cmp(s1, s2, n)  strnicmp((char *) s1, (char *) s2, n)
+
+
 #define ngx_getcwd(buf, size)       GetCurrentDirectory(size, buf)
 #define ngx_getcwd_n                "GetCurrentDirectory()"
 #define NGX_MAX_PATH                MAX_PATH