[commit: ghc] master: By default, be lax about dependencies on GHC (12646a9)

[Ian Lynagh]

Repository : ssh://darcs.haskell.org//srv/darcs/ghc

On branch  : master

http://hackage.haskell.org/trac/ghc/changeset/12646a9c0f748da67098d9da3f357a756fd7df7c

>---------------------------------------------------------------

commit 12646a9c0f748da67098d9da3f357a756fd7df7c
Author: Ian Lynagh <igloo at earth.li>
Date:   Sun Aug 28 12:23:04 2011 +0100

    By default, be lax about dependencies on GHC
    
    There are a number of things which technically depend on GHC (e.g. if
    ghc changes then Haskell files may be compiled differently, or Cabal
    packages may be configured differently). However, in practice, having
    a real dependency on GHC is just a pain: We normally don't want to
    spend time recompiling other things while we're working on the
    compiler, and even if we did, GHC will normally decide compilation
    isn't needed anyway. So by default we use order-only dependencies on
    GHC, i.e. GHC must exist, but if it's newer than other targets then
    rebuilding is not necessary.

 ghc.mk                          |   19 +++++++++++++++++++
 mk/config.mk.in                 |   11 +++++++++++
 rules/build-package-data.mk     |    2 +-
 rules/c-suffix-rules.mk         |   12 ++++++------
 rules/cmm-suffix-rules.mk       |   12 ++++++------
 rules/hs-suffix-rules-srcdir.mk |   12 ++++++------
 rules/hs-suffix-rules.mk        |    8 ++++----
 7 files changed, 53 insertions(+), 23 deletions(-)


Diff suppressed because of size. To see it, use:

    git show 12646a9c0f748da67098d9da3f357a756fd7df7c