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[ghc-hetmet.git] / compiler / iface / MkIface.lhs

diff --git a/compiler/iface/MkIface.lhs b/compiler/iface/MkIface.lhs
index e335f75..e569c47 100644 (file)
--- a/compiler/iface/MkIface.lhs
+++ b/compiler/iface/MkIface.lhs
@@ -181,6 +181,10 @@ code of A, and thereby haul in all the stuff reachable from it.
 haul in all the unfoldings for B, in case the module that imports A *is*
 compiled with -O.  I think this is the case.]
 
+SimonM [30/11/2007]: I believe the above is all out of date; the
+current implementation doesn't do it this way.  Instead, when any of
+the dependencies of a declaration changes, the version of the
+declaration itself changes.
 
 \begin{code}
 #include "HsVersions.h"
@@ -409,7 +413,7 @@ mkIface_ hsc_env maybe_old_iface
                        mi_fix_fn = mkIfaceFixCache fixities }
 
                -- Add version information
-              ; ext_ver_fn = mkParentVerFun hsc_env eps
+                ; ext_ver_fn = mkParentVerFun hsc_env eps
                ; (new_iface, no_change_at_all, pp_diffs, pp_orphs) 
                        = {-# SCC "versioninfo" #-}
                         addVersionInfo ext_ver_fn maybe_old_iface
@@ -704,6 +708,8 @@ computeChangedOccs ver_fn this_module old_usages eq_info
     -- return True if an external name has changed
     name_changed :: Name -> Bool
     name_changed nm
+       | isWiredInName nm      -- Wired-in things don't get into interface
+       = False                 -- files and hence don't get into the ver_fn
         | Just ents <- lookupUFM usg_modmap (moduleName mod),
           Just v    <- lookupUFM ents parent_occ
         = v < new_version