Stop supporting GHC 9.0 on Darwin. Document supported combinations.

.github/workflows/ci.yml

@@ -38,6 +38,8 @@ jobs:
             largeRecords: true
           - compiler: ghc981
             dhall: true
+          - compiler: ghc902
+            os: macos-latest
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/[email protected]

CHANGELOG.md

@@ -8,8 +8,9 @@
   * Proto3.Suite.DotProto.Generate.LargeRecord
   * Proto3.Suite.DotProto.Generate.Syntax
 * Drop support for GHC 8.10.
-* Add support for GHC 9.6.
-* Add support for GHC 9.8.
+* On Darwin, drop support for GHC 9.0.
+* Add support for GHC 9.6 (without large-records).
+* Add support for GHC 9.8 (without large-records, dhall).
 
 # 0.7.0
 * Support GHC 9.2, 9.4.

README.md

@@ -19,6 +19,37 @@ for more details.
 
 ## Building
 
+### GHC Versions
+
+#### GHC 9.8
+
+We do not support features making use of the dhall and large-records
+libraries because neither library currently builds on GHC 9.8, and
+therefore we cannot test our support.
+
+Otherwise we support GHC 9.8 on Linux and Darwin.
+
+#### GHC 9.6
+
+We do not support features making use of the large-records
+library because it does not currently builds on GHC 9.6, and
+therefore we cannot test our support.
+
+Otherwise we support GHC 9.6 on Linux and Darwin.
+
+#### GHC 9.4
+
+Supported on Linux and Darwin.
+
+#### GHC 9.2
+
+Supported on Linux and Darwin.
+
+#### GHC 9.0
+
+Supported only on Linux because "crypton" fails a test on Darwin,
+probably due to [this issue](https://github.com/kazu-yamamoto/crypton/issues/35).
+
 ### Nix shell + Cabal (recommended)
 
 The Nix shell provides an incremental build environment (but see below for