[commit: ghc] wip/andrey/hadrian-readme, wip/andrey/windows-cabal, wip/fix-junit, wip/spj-wibbles: Hadrian: Add support for building stage3 (6486c6e)

[git at git.haskell.org]

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

On branches: wip/andrey/hadrian-readme,wip/andrey/windows-cabal,wip/fix-junit,wip/spj-wibbles
Link       : http://ghc.haskell.org/trac/ghc/changeset/6486c6e49c53e75f37ed732b38c5be7ae64785e8/ghc

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

commit 6486c6e49c53e75f37ed732b38c5be7ae64785e8
Author: Matthew Pickering <matthewtpickering at gmail.com>
Date:   Sun Dec 16 08:58:41 2018 +0000

    Hadrian: Add support for building stage3
    
    This ticket enables the building of a `stage3` compiler by making the
    build logic more consistent and predictable in Hadrian.
    
    Two of the main changes are:
    
    1. In order to build anything at stageN we use the package database
    present at stageN. Fixing #16069
    2. `haddock` and `ghc-tags` are built
    as stage1 executables (with the stage1 compiler) rather than as
    stage2 compiler. Fixing
    [hadrian#661](https://github.com/snowleopard/hadrian/issues/661)
    
    In order to build a stage3 compiler, you have to set the new `finalStage` hadrian option to `Stage3`.


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

6486c6e49c53e75f37ed732b38c5be7ae64785e8
 hadrian/README.md                          |  7 +++
 hadrian/cfg/system.config.in               |  4 ++
 hadrian/doc/cross-compile.md               |  1 -
 hadrian/doc/user-settings.md               | 20 +++++++--
 hadrian/src/Base.hs                        |  4 +-
 hadrian/src/Builder.hs                     |  4 +-
 hadrian/src/Context.hs                     |  4 +-
 hadrian/src/Packages.hs                    | 22 ++++-----
 hadrian/src/Rules.hs                       | 22 +++++----
 hadrian/src/Rules/BinaryDist.hs            |  4 +-
 hadrian/src/Rules/Generate.hs              |  7 +--
 hadrian/src/Rules/Libffi.hs                | 72 ++++++++++++++++--------------
 hadrian/src/Rules/Program.hs               |  2 +-
 hadrian/src/Settings/Builders/Common.hs    |  3 +-
 hadrian/src/Settings/Builders/Configure.hs |  3 +-
 hadrian/src/Settings/Builders/Make.hs      |  9 ++--
 hadrian/src/Settings/Default.hs            |  9 ++--
 hadrian/src/UserSettings.hs                | 15 +++----
 hadrian/src/Utilities.hs                   | 13 +++---
 19 files changed, 127 insertions(+), 98 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 6486c6e49c53e75f37ed732b38c5be7ae64785e8