[commit: ghc] master: Make GHC (the library) flexible in the choice of integer library (fc2ff6d)

[git at git.haskell.org]

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

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/fc2ff6dd7496a33bf68165b28f37f40b7d647418/ghc

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

commit fc2ff6dd7496a33bf68165b28f37f40b7d647418
Author: Joachim Breitner <mail at joachim-breitner.de>
Date:   Wed Oct 3 15:36:55 2018 +0200

    Make GHC (the library) flexible in the choice of integer library
    
    Summary:
    We have more and more users of GHC as a library, for example the
    Haskell-to-WebAssembly-compiler https://github.com/tweag/asterius.
    These need to make different decisions about various aspects of
    code generation than the host compiler, and ideally GHC-the-library
    allows them to set the `DynFlags` as needed.
    
    This patch adds a new `DynFlag` that configures which `integer`
    library to use. This flag is initialized by `cIntegerLibraryType`
    (as before), and is only used in `CorePrep` to decide whether to
    use `S#` or not.
    
    The other code paths that were varying based on `cIntegerLibraryType`
    are no now longer varying: The trick is to use `integer-wired-in`
    as the `-this-unit-id` when compiling either `integer-gmp` or
    `integer-simple`.
    
    Test Plan: Validate is happy.
    
    Reviewers: hvr, bgamari
    
    Reviewed By: bgamari
    
    Subscribers: TerrorJack, adamse, simonpj, rwbarton, carter
    
    GHC Trac Issues: #13477
    
    Differential Revision: https://phabricator.haskell.org/D5079


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fc2ff6dd7496a33bf68165b28f37f40b7d647418
 compiler/basicTypes/Module.hs                 | 60 +++++++++++++++------------
 compiler/coreSyn/CorePrep.hs                  |  5 ++-
 compiler/ghc.mk                               |  2 -
 compiler/main/DynFlags.hs                     |  4 ++
 compiler/main/Packages.hs                     | 48 +++++++++++----------
 compiler/prelude/PrelNames.hs                 | 49 +++++++++++++++-------
 libraries/integer-gmp/integer-gmp.cabal       |  5 ++-
 libraries/integer-simple/integer-simple.cabal |  5 ++-
 8 files changed, 110 insertions(+), 68 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 fc2ff6dd7496a33bf68165b28f37f40b7d647418