diff -r 6d88d6558b7a -r 07a87075fa2d config/libc/newlib.in
--- a/config/libc/newlib.in	Sun Sep 16 14:12:22 2012 -0400
+++ b/config/libc/newlib.in	Thu Oct 11 14:39:45 2012 +1000
@@ -52,8 +52,25 @@
       
       In a word: use the CVS snapshot at your own risk! 
 
+config LIBC_NEWLIB_CUSTOM
+    bool
+    prompt "Custom newlib"
+    depends on EXPERIMENTAL
+
 endchoice
 
+if LIBC_NEWLIB_CUSTOM
+
+config LIBC_NEWLIB_CUSTOM_LOCATION
+    string
+    prompt "Full path to custom newlib source"
+    default ""
+    help
+      Enter the path to the directory (or tarball) of your source for newlib,
+      or leave blank to use default CT_CUSTOM_LOCATION_ROOT_DIR/newlib
+
+endif # LIBC_NEWLIB_CUSTOM
+
 config LIBC_VERSION
     string
     prompt "use CVS tag" if LIBC_NEWLIB_CVS
@@ -63,6 +80,7 @@
     default "1.19.0" if LIBC_NEWLIB_V_1_19_0
     default "1.18.0" if LIBC_NEWLIB_V_1_18_0
     default "1.17.0" if LIBC_NEWLIB_V_1_17_0
+    default "custom" if LIBC_NEWLIB_CUSTOM
     help
       Enter the tag you want to use.
       Leave empty to use the 'head' of the repository.