diff -r f00eb97ff649 -r 2fa4b675a9a3 docs/overview.txt
--- a/docs/overview.txt	Fri Sep 14 21:17:59 2007 +0000
+++ b/docs/overview.txt	Fri Sep 14 21:50:30 2007 +0000
@@ -499,6 +499,14 @@
        the architecture part of the target tuple.
        Eg.: "armeb" for big endian ARM
             "i386" for an i386
+   + the environment variable CT_KERNEL_ARCH
+     - optional
+     - contains:
+       the architecture name as understandable by the Linux kernel build
+       system.
+       Eg.: "arm" for an ARM
+            "powerpc" for a PowerPC
+            "i386" for an x86
    + provides:
      - the environment variable CT_TARGET_ARCH
      - optional