diff -r d3af3efce68c -r a797ad9c7bd5 config/libc/glibc-eglibc.in-common
--- a/config/libc/glibc-eglibc.in-common	Thu Nov 11 00:29:53 2010 +0100
+++ b/config/libc/glibc-eglibc.in-common	Thu Nov 11 01:11:17 2010 +0100
@@ -65,6 +65,18 @@
     help
       Do not include versioning information in the library objects.
 
+config LIBC_OLDEST_ABI
+    string
+    prompt "Oldest supported ABI"
+    default ""
+    help
+      Set the oldest ABI supported by the C library.
+      
+      Setting this option, for example, to 2.2 will provide ABI support
+      back to (e)glibc-2.2.
+
+      If this option is not set, (e)glibc will choose for you.
+
 config LIBC_GLIBC_USE_PORTS
     bool
     prompt "Use the ports addon"