diff -r 15f44768d3f7 -r 372bc84bea36 docs/overview.txt
--- a/docs/overview.txt	Mon Jul 09 17:35:45 2007 +0000
+++ b/docs/overview.txt	Fri Jul 13 14:25:06 2007 +0000
@@ -144,6 +144,27 @@
   An alias for the toolchian. It will be used as a prefix to the toolchain
   tools. For example, you will have ${CT_TARGET_ALIAS}-gcc
 
+Also, if you think you don't see enough versions, you can try to enable one of
+those:
+
+CT_OBSOLETE:
+  Show obsolete versions or tools. Most of the time, you don't want to base
+  your toolchain on too old a version (of gcc, for example). But at times, it
+  can come handy to use such an old version for regression tests. Those old
+  versions are hidden behind CT_BSOLETE.
+
+CT_EXPERIMENTAL:
+  Show experimental versions or tools. Again, you might not want to base your
+  toolchain on too recent tools (eg. gcc) for production. But if you need a
+  feature present only in a recent version, or a new tool, you can find them
+  hidden behind CT_EXPERIMENTAL.
+
+CT_BROKEN:
+  Show broken versions or tools. Some usefull tools are currently broken: they
+  won't compile, run, or worse, cause defects when running. But if you are
+  brave enough, you can try and debug them. They are hidden behind CT_BROKEN,
+  which itself is hiddent behind EXPERIMENTAL.
+
 ________________________
                        /
 Running crosstool-NG  /