Don't emit 'Skipping' messages unless -v2 or higher is on

Following GNU make, this patch makes GHC not emit messages about modules
its skipping. This makes builds much quieter, and its a lot easier to
work out what effects a change had on the code.

The current behaviour can be recovered with -v2

diff --git a/compiler/main/HscMain.lhs b/compiler/main/HscMain.lhs
index fdad852..d5d920d 100644 (file)
--- a/compiler/main/HscMain.lhs
+++ b/compiler/main/HscMain.lhs
@@ -397,9 +397,9 @@ batchMsg mb_mod_index recomp
          liftIO $ do
          if recomp
             then showMsg "Compiling "
-            else showMsg "Skipping  "
-
-
+            else if verbosity (hsc_dflags hsc_env) >= 2
+                    then showMsg "Skipping  "
+                    else return ()
 
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