From 6578978c084d130cb0732beefeff2240466b5350 Mon Sep 17 00:00:00 2001
From: brandon s allbery kf8nh <allbery.b@gmail.com>
Date: Thu, 17 Oct 2024 14:58:49 -0400
Subject: [PATCH] add new non-compile-affecting options for ghc 9.12
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

- ghc 9.12 adds several new command line options, divided between
  `LANGUAGE`s (already added), warnings, new preprocessor control options,
  and compilation control options. Two options needed to be added to the
  list of options requiring `Int` parameters.

  The new options, excluding warning and language options, are:

  * `-fexpose-overloaded-unfoldings`
  * `-fmax-forced-spec-args=N`
  * `-fno-expose-overloaded-unfoldings`
  * `-fno-object-determinism`
  * `-fobject-determinism`
  * `-fwrite-if-compression=N`
  * `-optCmmP…`
  * `-optJSP…`
  * `-pgmCmmP`
  * `-pgmJSP`

  As they all affect compilation and store hashes, the only necessary
  change was to list the two numeric options so they will be parsed
  correctly. To the best of our understanding, `-pgm*` and `-opt*`
  options are already handled as a group.
---
 Cabal/src/Distribution/Simple/Program/GHC.hs |  1 +
 changelog.d/pr-10468                         | 31 ++++++++++++++++++++
 2 files changed, 32 insertions(+)
 create mode 100644 changelog.d/pr-10468

diff --git a/Cabal/src/Distribution/Simple/Program/GHC.hs b/Cabal/src/Distribution/Simple/Program/GHC.hs
index ce0ea9db92a..86320cc9472 100644
--- a/Cabal/src/Distribution/Simple/Program/GHC.hs
+++ b/Cabal/src/Distribution/Simple/Program/GHC.hs
@@ -329,6 +329,7 @@ normaliseGhcArgs (Just ghcVersion) PackageDescription{..} ghcArgs
           ]
         , from [8, 2] ["-fmax-uncovered-patterns", "-fmax-errors"]
         , from [8, 4] $ to [8, 6] ["-fmax-valid-substitutions"]
+        , from [9, 12] ["-fmax-forced-spec-args", "-fwrite-if-compression"]
         ]
 
     dropIntFlag :: Bool -> String -> String -> Any
diff --git a/changelog.d/pr-10468 b/changelog.d/pr-10468
new file mode 100644
index 00000000000..2b1511a609c
--- /dev/null
+++ b/changelog.d/pr-10468
@@ -0,0 +1,31 @@
+synopsis: Add new options from ghc 9.12
+packages: Cabal
+prs: #10468
+significance:
+
+description: {
+
+- ghc 9.12 adds several new command line options, divided between
+  `LANGUAGE`s (already added), warnings, new preprocessor control options,
+  and compilation control options. Two options needed to be added to the
+  list of options requiring `Int` parameters.
+
+  The new options, excluding warning and language options, are:
+
+  * `-fexpose-overloaded-unfoldings`
+  * `-fmax-forced-spec-args=N`
+  * `-fno-expose-overloaded-unfoldings`
+  * `-fno-object-determinism`
+  * `-fobject-determinism`
+  * `-fwrite-if-compression=N`
+  * `-optCmmP…`
+  * `-optJSP…`
+  * `-pgmCmmP`
+  * `-pgmJSP`
+
+  As they all affect compilation and store hashes, the only necessary
+  change was to list the two numeric options so they will be parsed
+  correctly. To the best of our understanding, `-pgm*` and `-opt*`
+  options are already handled as a group.
+
+}