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<h3>
Josh Meredith pushed to branch wip/extensible-interface-files
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
</h3>
<h4>
Commits:
</h4>
<ul>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/57b888c0e90be7189285a6b078c30b26d0923809">57b888c0</a></strong>
<div>
<span>by Ryan Scott</span>
<i>at 2020-03-31T10:54:20-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Require GHC 8.8 as the minimum compiler for bootstrapping

This allows us to remove several bits of CPP that are either always
true or no longer reachable. As an added bonus, we no longer need to
worry about importing `Control.Monad.Fail.fail` qualified to avoid
clashing with `Control.Monad.fail`, since the latter is now the same
as the former.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/33f095511a8fce4c945bbcd4feb3910c854dcb61">33f09551</a></strong>
<div>
<span>by Ryan Scott</span>
<i>at 2020-03-31T10:54:57-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add regression test for #17963

The panic in #17963 happened to be fixed by commit
e3c374cc5bd7eb49649b9f507f9f7740697e3f70. This patch adds a
regression test to ensure that it remains fixed.

Fixes #17963.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/09a36e80ecaefcfb60eccda98bd06461d0aeca70">09a36e80</a></strong>
<div>
<span>by Ömer Sinan Ağacan</span>
<i>at 2020-03-31T10:55:37-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Simplify stderrSupportsAnsiColors

The combinator andM is used only once, and the code is shorter and
simpler if you inline it.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/95bccdd034ce4dd2d1bc36db9f1ba5e172550249">95bccdd0</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-03-31T10:56:19-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">base: Ensure that encoding global variables aren't inlined

As noted in #17970, these (e.g. `getFileSystemEncoding` and
`setFileSystemEncoding`) previously had unfoldings, which would
break their global-ness.

While not strictly necessary, I also add a NOINLINE on
`initLocaleEncoding` since it is used in `System.IO`, ensuring that we
only system's query the locale encoding once.

Fixes #17970.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/982aaa837aed564ae9b418cda8e97d4facff8fb8">982aaa83</a></strong>
<div>
<span>by Andreas Klebinger</span>
<i>at 2020-03-31T10:56:55-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Update hadrian index revision.

Required in order to build hadrian using ghc-8.10
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4b9c586472bf99425f7bbcf346472d7c54f05028">4b9c5864</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-03-31T10:57:32-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">integer-gmp: Bump version and add changelog entry
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/2310cffdfb736fa4a2c5775c165c123cf7dc0171">2310cffd</a></strong>
<div>
<span>by Josh Meredith</span>
<i>at 2020-04-01T00:53:23-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Implement extensible interface files
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/f99f30d94f94e79e755d050de9373d60f5af9e57">f99f30d9</a></strong>
<div>
<span>by Josh Meredith</span>
<i>at 2020-04-01T00:53:23-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Change expected stdout for hi file Docs tests
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/51bf86fb6bfbc6dbf47094ed963c58af27563585">51bf86fb</a></strong>
<div>
<span>by Josh Meredith</span>
<i>at 2020-04-01T00:53:23-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add comment subtitle section for BinData
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/cb00cf1f4b77bcc0a5376d427e97b7d98ed52090">cb00cf1f</a></strong>
<div>
<span>by Josh Meredith</span>
<i>at 2020-04-01T00:53:23-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add some discussion about extensible interfaces to extending_ghc.rst
</pre>
</li>
</ul>
<h4>30 changed files:</h4>
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<a href="#587d266bb27a4dc3022bbed44dfa19849df3044c">
.gitlab-ci.yml
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<a href="#36a42448a83a9d1f6df8475f03ead2eed199dd8e">
compiler/GHC/Core/Lint.hs
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<a href="#35cff95f9f44690fc50b44bbe8ac3c554c7d5a5e">
compiler/GHC/Core/Make.hs
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<a href="#7685262a8a145335ec922d0a92ebb4a789bf0a3e">
compiler/GHC/Core/Op/ConstantFold.hs
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<a href="#d52bc1e90d7432064a2998de2a2751b6fecb7680">
compiler/GHC/Core/Op/Specialise.hs
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<a href="#89a2e0e1a3095c7a42b10f2819049908908080e8">
compiler/GHC/Core/Unify.hs
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compiler/GHC/Driver/Types.hs
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<a href="#9f11c1c113f11a416be9e556904531050cbb5b2e">
compiler/GHC/Iface/Binary.hs
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compiler/GHC/Iface/Load.hs
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<a href="#4ed0dc87b8bdd9324e8a181cff15caa104b9e58c">
compiler/GHC/Iface/Make.hs
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compiler/GHC/Types/Unique/Supply.hs
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compiler/main/SysTools/Process.hs
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compiler/main/SysTools/Terminal.hs
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compiler/typecheck/TcRnTypes.hs
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compiler/typecheck/TcSMonad.hs
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compiler/utils/Binary.hs
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compiler/utils/IOEnv.hs
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configure.ac
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docs/users_guide/extending_ghc.rst
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hadrian/cabal.project
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hadrian/src/Hadrian/Utilities.hs
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hadrian/src/Settings/Builders/Cabal.hs
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hadrian/src/Settings/Builders/Ghc.hs
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libraries/base/Control/Monad/ST/Lazy/Imp.hs
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libraries/base/GHC/IO/Encoding.hs
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libraries/base/GHC/ST.hs
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libraries/base/Text/ParserCombinators/ReadPrec.hs
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libraries/integer-gmp/changelog.md
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<h5>The diff was not included because it is too large.</h5>

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