Reorganisation of the source tree

Most of the other users of the fptools build system have migrated to
Cabal, and with the move to darcs we can now flatten the source tree
without losing history, so here goes.

The main change is that the ghc/ subdir is gone, and most of what it
contained is now at the top level.  The build system now makes no
pretense at being multi-project, it is just the GHC build system.

No doubt this will break many things, and there will be a period of
instability while we fix the dependencies.  A straightforward build
should work, but I haven't yet fixed binary/source distributions.
Changes to the Building Guide will follow, too.

1 files changed, 43 insertions, 0 deletions

diff --git a/compiler/ndpFlatten/FlattenInfo.hs b/compiler/ndpFlatten/FlattenInfo.hs
new file mode 100644
index 0000000000..f759242455
--- /dev/null
+++ b/compiler/ndpFlatten/FlattenInfo.hs
@@ -0,0 +1,43 @@
+--  $Id$
+--
+--  Copyright (c) 2002 Manuel M T Chakravarty & Gabriele Keller
+--
+--  Information for modules outside of the flattening module collection.
+--
+--- DESCRIPTION ---------------------------------------------------------------
+--
+--  This module contains information that is needed, and thus imported, by
+--  modules that are otherwise independent of flattening and may in fact be
+--  directly or indirectly imported by some of the flattening-related
+--  modules.  This is to avoid cyclic module dependencies.
+-- 
+--- DOCU ----------------------------------------------------------------------
+--
+--  Language: Haskell 98
+--
+--- TODO ----------------------------------------------------------------------
+--
+
+module FlattenInfo (
+  namesNeededForFlattening
+) where
+
+import StaticFlags (opt_Flatten)
+import NameSet     (FreeVars, emptyFVs, mkFVs)
+import PrelNames   (fstName, andName, orName, lengthPName, replicatePName,
+		    mapPName, bpermutePName, bpermuteDftPName, indexOfPName)
+
+
+-- this is a list of names that need to be available if flattening is
+-- performed (EXPORTED)
+--
+--  * needs to be kept in sync with the names used in Core generation in
+--   `FlattenMonad' and `NDPCoreUtils'
+--
+namesNeededForFlattening :: FreeVars
+namesNeededForFlattening
+  | not opt_Flatten = emptyFVs		-- none without -fflatten
+  | otherwise
+  = mkFVs [fstName, andName, orName, lengthPName, replicatePName, mapPName,
+	   bpermutePName, bpermuteDftPName, indexOfPName]
+    -- stuff from PrelGHC doesn't have to go here