[commit: ghc] master: Support for abi-depends for computing shadowing. (ee4e165)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/ee4e1654c31b9c6f6ad9b19ece25f040bbbcbd72/ghc

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

commit ee4e1654c31b9c6f6ad9b19ece25f040bbbcbd72
Author: Edward Z. Yang <ezyang at cs.stanford.edu>
Date:   Wed Dec 14 01:28:43 2016 -0800

    Support for abi-depends for computing shadowing.
    
    Summary:
    This is a complete fix based off of
    ed7af26606b3a605a4511065ca1a43b1c0f3b51d for handling
    shadowing and out-of-order -package-db flags simultaneously.
    
    The general strategy is we first put all databases together,
    overriding packages as necessary.  Once this is done, we successfully
    prune out broken packages, including packages which depend on a package
    whose ABI differs from the ABI we need.
    
    Our check gracefully degrades in the absence of abi-depends, as
    we only check deps which are recorded in abi-depends.
    
    Contains time and Cabal submodule update.
    
    Signed-off-by: Edward Z. Yang <ezyang at cs.stanford.edu>
    
    Test Plan: validate
    
    Reviewers: niteria, austin, bgamari
    
    Subscribers: thomie
    
    Differential Revision: https://phabricator.haskell.org/D2846
    
    GHC Trac Issues: #12485


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

ee4e1654c31b9c6f6ad9b19ece25f040bbbcbd72
 compiler/backpack/DriverBkp.hs        |   1 +
 compiler/ghc.cabal.in                 |   2 +-
 compiler/main/Packages.hs             | 324 ++++++++++++++++++++++------------
 ghc/ghc-bin.cabal.in                  |   2 +-
 libraries/Cabal                       |   2 +-
 libraries/ghc-boot/GHC/PackageDb.hs   |  12 +-
 libraries/hpc                         |   2 +-
 libraries/time                        |   2 +-
 testsuite/driver/extra_files.py       |   1 +
 testsuite/tests/cabal/Makefile        |  41 ++++-
 testsuite/tests/cabal/T12485/Makefile |   4 +-
 testsuite/tests/cabal/T12485/all.T    |   3 +-
 testsuite/tests/cabal/T12485a.stdout  |   3 +
 testsuite/tests/cabal/T1750.stderr    |   2 +-
 testsuite/tests/cabal/all.T           |   7 +
 testsuite/tests/cabal/shadow1.pkg     |   1 +
 testsuite/tests/cabal/shadow2.pkg     |   2 +
 testsuite/tests/cabal/shadow3.pkg     |   1 +
 testsuite/tests/perf/haddock/all.T    |   3 +-
 utils/ghc-cabal/Main.hs               |   2 +-
 utils/ghc-pkg/Main.hs                 |   1 +
 21 files changed, 282 insertions(+), 136 deletions(-)

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

    git diff-tree --root --patch-with-stat --no-color --find-copies-harder --ignore-space-at-eol --cc ee4e1654c31b9c6f6ad9b19ece25f040bbbcbd72