Add release notes for 8.10.6

docs/users_guide/8.10.6-notes.rst

+.. _release-8-10-6:
+Release notes for version 8.10.6
+================================
+
+The significant changes to the various parts of the compiler are listed in the
+following sections.
+
+The :ghc-flag:`LLVM backend <-fllvm>` of this release is to be used with LLVM versions 9
+through 12.
+
+General bug fixes
+-----------------
+
+- Export some RTS symbols required for static builds of GHC (:ghc-ticket:`19763`).
+
+- Fix LLVM version checking logic so it no longer complains about supported LLVM versions.
+  (:ghc-ticket:`19973`, :ghc-ticket:`19829`, :ghc-ticket:`19959`)
+
+- Fix some RTS crashes on Darwin due to mixing up the closure sizes of the ``aarch64``
+  and ``x86-64`` backends. 
+
+- Fix a crash on the non-moving GC due to incorrect logic for calculating the header
+  size for array write barries (:ghc-ticket:`19715`)
+
+- Fix a bug in ``base`` leading to a high likelihood of space leaks when using lazy
+  bytestrings. (:ghc-ticket:`20107`)
+
+- Fix some timer races in the RTS possibly manifesting in :ghc-ticket:`18033` and
+  :ghc-ticket:`20132`
+
+- Fix some memory ordering issues manifesting on aarch64-darwin due to an RTS bug
+  (:ghc-ticket:`20093`)
+
+- Fix a number of bugs affecting the RTS m32 allocator (:ghc-ticket:`19421`)
+
+- Fix a segmentation fault when resizing the GHCi terminal window on aarch64-darwin
+  due to an incorrect foreign import in ``haskeline`` (:ghc-ticket:`20079`)
+
+Packaging fixes
+-----------------
+
+- Actually use the ``integer-simple`` big integer backend in the Alpine Linux and
+  Windows (integer-simple) releases. (:ghc-ticket:`18967`, :ghc-ticket:`19953`)
+
+- Don't include ``configure`` scripts in windows bindist. (:ghc-ticket:`19868`)
+
+- Always create both versioned and unversioned executables with the hadrian bindist. 
+  (:ghc-ticket:`20074`)
+
+- Give ``ghc-pkg`` the same version as ``ghc`` (:ghc-ticket:`20087`)
+
+- Bump ``containers`` to 0.6.5.1
+
+- Bump ``base`` to 4.14.3.0
+
+- Bump ``Win32`` to 2.6.2.0 (:ghc-ticket:`20202`)
+
+Portability fixes
+-----------------
+
+- Fix an issue making GHC unable to build on FreeBSD due to an undefined reference
+  to ``libiconv``. (:ghc-ticket:`19958`)
+
+- Match the C calling convention on platforms like s390x by sign/zero extending
+  parameters for foreign calls. (:ghc-ticket:`19023`)
+
+- Fix ``xxHash`` duplicate symbol errors on FreeBSD. (:ghc-ticket:`19948`)
+
+- Properly honour :ghc-flag:`-fno-use-rpaths` on darwin. (:ghc-ticket:`20004`)
+
+- Fix an issue causing libraries like ``network`` to fail building due to incorrect linker
+  paths. (:ghc-ticket:`19968`)
+
+- Fix a linking portability issue on macOS that resulted in undefined symbol
+  errors for ``___darwin_check_fd_set_overflow`` (:ghc-ticket:`19950`)
+
+Known issues
+------------
+
+- A long-standing bug (:ghc-ticket:`16893`) which can cause some applications
+  of ``unsafeCoerce`` to segmentation fault is only partially fixed in this
+  release. This release only avoids this issue in the uses of ``unsafeCoerce``
+  in ``Data.Typeable.Internal``, which was the proximate cause of
+  :ghc-ticket:`16893`.
+
+  However, it is possible that this bug could manifest in user-code using
+  ``unsafeCoerce`` to perform dynamic type checks. See the :ghc-ticket:`ticket
+  <16893>` for details.
+
+  We expect that this issue will be fixed in the next major release of GHC.
+
+- A long-standing bug (:ghc-ticket:`17760`) where some uses of the ``touch#``
+  primop can be dropped by the simplifier is present in this release. This bug
+  will be fixed in GHC 9.0.1. In the meantime, see the :ghc-ticket:`ticket
+  <17760>` for mitigations.
+
+
+Included libraries
+------------------
+
+The package database provided with this distribution also contains a number of
+packages other than GHC itself. See the changelogs provided with these packages
+for further change information.
+
+.. ghc-package-list::
+
+    libraries/array/array.cabal:             Dependency of ``ghc`` library
+    libraries/base/base.cabal:               Core library
+    libraries/binary/binary.cabal:           Dependency of ``ghc`` library
+    libraries/bytestring/bytestring.cabal:   Dependency of ``ghc`` library
+    libraries/Cabal/Cabal/Cabal.cabal:       Dependency of ``ghc-pkg`` utility
+    libraries/containers/containers/containers.cabal:   Dependency of ``ghc`` library
+    libraries/deepseq/deepseq.cabal:         Dependency of ``ghc`` library
+    libraries/directory/directory.cabal:     Dependency of ``ghc`` library
+    libraries/exceptions/exceptions.cabal:   Dependency of ``haskeline`` library
+    libraries/filepath/filepath.cabal:       Dependency of ``ghc`` library
+    compiler/ghc.cabal:                      The compiler itself
+    libraries/ghci/ghci.cabal:               The REPL interface
+    libraries/ghc-boot/ghc-boot.cabal:       Internal compiler library
+    libraries/ghc-boot-th/ghc-boot-th.cabal: Internal compiler library
+    libraries/ghc-compact/ghc-compact.cabal: Core library
+    libraries/ghc-heap/ghc-heap.cabal:       GHC heap-walking library
+    libraries/ghc-prim/ghc-prim.cabal:       Core library
+    libraries/haskeline/haskeline.cabal:     Dependency of ``ghci`` executable
+    libraries/hpc/hpc.cabal:                 Dependency of ``hpc`` executable
+    libraries/integer-gmp/integer-gmp.cabal: Core library
+    libraries/libiserv/libiserv.cabal:       Internal compiler library
+    libraries/mtl/mtl.cabal:                 Dependency of ``Cabal`` library
+    libraries/parsec/parsec.cabal:           Dependency of ``Cabal`` library
+    libraries/pretty/pretty.cabal:           Dependency of ``ghc`` library
+    libraries/process/process.cabal:         Dependency of ``ghc`` library
+    libraries/stm/stm.cabal:                 Dependency of ``haskeline`` library
+    libraries/template-haskell/template-haskell.cabal:     Core library
+    libraries/terminfo/terminfo.cabal:       Dependency of ``haskeline`` library
+    libraries/text/text.cabal:               Dependency of ``Cabal`` library
+    libraries/time/time.cabal:               Dependency of ``ghc`` library
+    libraries/transformers/transformers.cabal: Dependency of ``ghc`` library
+    libraries/unix/unix.cabal:               Dependency of ``ghc`` library
+    libraries/Win32/Win32.cabal:             Dependency of ``ghc`` library
+    libraries/xhtml/xhtml.cabal:             Dependency of ``haddock`` executable
+
+
+

docs/users_guide/index.rst

@@ -17,6 +17,7 @@ Contents:
    8.10.3-notes
    8.10.4-notes
    8.10.5-notes
+   8.10.6-notes
    ghci
    runghc
    usage