Add the help text for 'position independent executable' code build

Signed-off-by: Gilles Espinasse <g.esp@free.fr>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

diff --git a/Config.in b/Config.in
index b491817327bcc3505bc6c78abbcf9576ed2c4243..3361e7381e09892c37e7ffa73a0185e184777d8f 100644 (file)
--- a/Config.in
+++ b/Config.in
@@ -466,7 +466,10 @@ config PIE
        default n
        depends on !STATIC
        help
-         (TODO: what is it and why/when is it useful?)
+         Hardened code option. PIE binaries are loaded at a different
+         address at each invocation. This has some overhead,
+         particularly on x86-32 which is short on registers.
+
          Most people will leave this set to 'N'.
 
 config NOMMU