X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Fmain%2FPackages.lhs;h=f6ba7c192da08a90426cf67b33ec3afe923831ec;hb=63e3a41126771e71c44705480c2bde7043a41df3;hp=4b1446280f8187560acc61eb3d7dc5b5ba629532;hpb=ba67234542412c2ca6656dbeadb7d225bc94d4b2;p=ghc-hetmet.git

diff --git a/compiler/main/Packages.lhs b/compiler/main/Packages.lhs
index 4b14462..f6ba7c1 100644
--- a/compiler/main/Packages.lhs
+++ b/compiler/main/Packages.lhs
@@ -557,11 +557,12 @@ shadowPackages pkgs preferred
  where
  check (shadowed,pkgmap) pkg
       | Just oldpkg <- lookupUFM pkgmap (packageConfigId pkg)
-      = let
-          ipid_new = installedPackageId pkg
-          ipid_old = installedPackageId oldpkg
-        in
-        if ipid_old `elem` preferred
+      , let
+            ipid_new = installedPackageId pkg
+            ipid_old = installedPackageId oldpkg
+        --
+      , ipid_old /= ipid_new
+      = if ipid_old `elem` preferred
            then ( (ipid_new, ShadowedBy ipid_old) : shadowed, pkgmap )
            else ( (ipid_old, ShadowedBy ipid_new) : shadowed, pkgmap' )
       | otherwise
@@ -657,6 +658,14 @@ mkPackageState dflags pkgs0 preload0 this_package = do
 
       ipid_map = listToFM [ (installedPackageId p, p) | p <- pkgs0 ]
 
+      -- pkgs0 with duplicate packages filtered out.  This is
+      -- important: it is possible for a package in the user package
+      -- DB to have the same IPID as a package in the global DB, and
+      -- we want the former to take precedence.  This is not the same
+      -- as shadowing (below), since in this case the two packages
+      -- have the same ABI and are interchangeable.
+      pkgs0_unique = eltsFM ipid_map
+
       ipid_selected = depClosure ipid_map [ InstalledPackageId i
                                           | ExposePackageId i <- flags ]
       
@@ -664,11 +673,11 @@ mkPackageState dflags pkgs0 preload0 this_package = do
       is_ignore IgnorePackage{} = True
       is_ignore _ = False
 
-      shadowed = shadowPackages pkgs0 ipid_selected
+      shadowed = shadowPackages pkgs0_unique ipid_selected
 
-      ignored  = ignorePackages ignore_flags pkgs0
+      ignored  = ignorePackages ignore_flags pkgs0_unique
 
-      pkgs0' = filter (not . (`elemFM` (plusFM shadowed ignored)) . installedPackageId) pkgs0
+      pkgs0' = filter (not . (`elemFM` (plusFM shadowed ignored)) . installedPackageId) pkgs0_unique
       broken   = findBroken pkgs0'
       unusable = shadowed `plusFM` ignored `plusFM` broken
 
@@ -678,7 +687,7 @@ mkPackageState dflags pkgs0 preload0 this_package = do
   -- Modify the package database according to the command-line flags
   -- (-package, -hide-package, -ignore-package, -hide-all-packages).
   --
-  pkgs1 <- foldM (applyPackageFlag unusable) pkgs0 other_flags
+  pkgs1 <- foldM (applyPackageFlag unusable) pkgs0_unique other_flags
   let pkgs2 = filter (not . (`elemFM` unusable) . installedPackageId) pkgs1
 
   -- Here we build up a set of the packages mentioned in -package
@@ -807,9 +816,9 @@ packageHsLibs dflags p = map (mkDynName . addSuffix) (hsLibraries p)
         -- the name of a shared library is libHSfoo-ghc<version>.so
         -- we leave out the _dyn, because it is superfluous
 
-        -- debug RTS includes support for -ticky and -eventlog
+        -- debug RTS includes support for -eventlog
         ways2 | WayDebug `elem` map wayName ways1 
-              = filter ((`notElem` [WayTicky,WayEventLog]) . wayName) ways1
+              = filter ((/= WayEventLog) . wayName) ways1
               | otherwise
               = ways1