##
## Caveat: a copy of configuration-ghc-8.6.x.nix with minor changes:
##
##  1. "8.7" strings
##  2. llvm 6
##  3. disabled library update: parallel
##
{ pkgs, haskellLib }:

with haskellLib;

let
  inherit (pkgs.stdenv.hostPlatform) isDarwin;
in

self: super: {

  llvmPackages = pkgs.lib.dontRecurseIntoAttrs self.ghc.llvmPackages;

  # Disable GHC core libraries.
  array = null;
  base = null;
  binary = null;
  bytestring = null;
  Cabal = null;
  Cabal-syntax = null;
  containers = null;
  deepseq = null;
  directory = null;
  exceptions = null;
  filepath = null;
  ghc-bignum = null;
  ghc-boot = null;
  ghc-boot-th = null;
  ghc-compact = null;
  ghc-heap = null;
  ghc-prim = null;
  ghci = null;
  haskeline = null;
  hpc = null;
  integer-gmp = null;
  libiserv = null;
  mtl = null;
  parsec = null;
  pretty = null;
  process = null;
  rts = null;
  stm = null;
  template-haskell = null;
  # GHC only builds terminfo if it is a native compiler
  terminfo = if pkgs.stdenv.hostPlatform == pkgs.stdenv.buildPlatform then null else self.terminfo_0_4_1_5;
  text = null;
  time = null;
  transformers = null;
  unix = null;
  # GHC only bundles the xhtml library if haddock is enabled, check if this is
  # still the case when updating: https://gitlab.haskell.org/ghc/ghc/-/blob/0198841877f6f04269d6050892b98b5c3807ce4c/ghc.mk#L463
  xhtml = if self.ghc.hasHaddock or true then null else self.xhtml_3000_2_2_1;

  # https://github.com/tibbe/unordered-containers/issues/214
  unordered-containers = dontCheck super.unordered-containers;

  # Test suite does not compile.
  data-clist = doJailbreak super.data-clist;  # won't cope with QuickCheck 2.12.x
  dates = doJailbreak super.dates; # base >=4.9 && <4.12
  Diff = dontCheck super.Diff;
  HaTeX = doJailbreak super.HaTeX; # containers >=0.4 && <0.6 is too tight; https://github.com/Daniel-Diaz/HaTeX/issues/126
  hpc-coveralls = doJailbreak super.hpc-coveralls; # https://github.com/guillaume-nargeot/hpc-coveralls/issues/82
  http-api-data = doJailbreak super.http-api-data;
  persistent-sqlite = dontCheck super.persistent-sqlite;
  system-fileio = dontCheck super.system-fileio;  # avoid dependency on broken "patience"
  unicode-transforms = dontCheck super.unicode-transforms;
  wl-pprint-extras = doJailbreak super.wl-pprint-extras; # containers >=0.4 && <0.6 is too tight; https://github.com/ekmett/wl-pprint-extras/issues/17
  RSA = dontCheck super.RSA; # https://github.com/GaloisInc/RSA/issues/14
  monad-par = dontCheck super.monad-par;  # https://github.com/simonmar/monad-par/issues/66
  github = dontCheck super.github; # hspec upper bound exceeded; https://github.com/phadej/github/pull/341
  binary-orphans = dontCheck super.binary-orphans; # tasty upper bound exceeded; https://github.com/phadej/binary-orphans/commit/8ce857226595dd520236ff4c51fa1a45d8387b33

  # https://github.com/jgm/skylighting/issues/55
  skylighting-core = dontCheck super.skylighting-core;

  # Break out of "yaml >=0.10.4.0 && <0.11": https://github.com/commercialhaskell/stack/issues/4485
  stack = doJailbreak super.stack;

  # https://github.com/fpco/inline-c/pull/131
  # and/or https://gitlab.haskell.org/ghc/ghc/-/merge_requests/7739
  inline-c-cpp =
    (if isDarwin then appendConfigureFlags ["--ghc-option=-fcompact-unwind"] else x: x)
    super.inline-c-cpp;
}