From: Simon Marlow <simonmar@microsoft.com>
Date: Fri, 3 Aug 2007 10:20:45 +0000 (+0000)
Subject: FIX part of #1372, improvements to the recompilation checker
X-Git-Tag: Before_type_family_merge~112
X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=commitdiff_plain;h=de21f53e25eb67248ba416187d34ba7ec9ec143a;hp=de21f53e25eb67248ba416187d34ba7ec9ec143a

FIX part of #1372, improvements to the recompilation checker
This patch adds a check that each imported module is listed in
the dependencies from the previous interface.  It catches the
following cases and forces recompilation:
   - an exposed package has been upgraded
   - we are compiling with different package flags
   - a home module that was shadowing a package module has been removed
   - a new home module has been added that shadows a package module

I haven't yet added the package timestamping as described in #1372.
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