point to the wiki

diff --git a/compiler/main/TidyPgm.lhs b/compiler/main/TidyPgm.lhs
index ebe196b..2a068d9 100644 (file)
--- a/compiler/main/TidyPgm.lhs
+++ b/compiler/main/TidyPgm.lhs
@@ -207,6 +207,10 @@ Step 1: Figure out external Ids
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 Note [choosing external names]
 
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 Note [choosing external names]
 

+See also the section "Interface stability" in the
+RecompilationAvoidance commentary:
+  http://hackage.haskell.org/trac/ghc/wiki/Commentary/Compiler/RecompilationAvoidance
+

 First we figure out which Ids are "external" Ids.  An
 "external" Id is one that is visible from outside the compilation
 unit.  These are
 First we figure out which Ids are "external" Ids.  An
 "external" Id is one that is visible from outside the compilation
 unit.  These are