From ec10df6ac9fd711df9fb52fa0e7e5471e07e2e78 Mon Sep 17 00:00:00 2001
From: Simon Hengel <sol@typeful.net>
Date: Sat, 13 Dec 2025 07:10:59 +0700
Subject: [PATCH] Don't warn on `mhs-options` (fixes #11341)

---
 .../src/Distribution/PackageDescription/FieldGrammar.hs       | 2 ++
 changelog.d/pr-11344                                          | 4 ++++
 2 files changed, 6 insertions(+)
 create mode 100644 changelog.d/pr-11344

diff --git a/Cabal-syntax/src/Distribution/PackageDescription/FieldGrammar.hs b/Cabal-syntax/src/Distribution/PackageDescription/FieldGrammar.hs
index 24861389b8f..3b5e061e816 100644
--- a/Cabal-syntax/src/Distribution/PackageDescription/FieldGrammar.hs
+++ b/Cabal-syntax/src/Distribution/PackageDescription/FieldGrammar.hs
@@ -717,6 +717,8 @@ optionsFieldGrammar =
     <* knownField "jhc-options"
     <* knownField "hugs-options"
     <* knownField "nhc98-options"
+    -- NOTE: These are used by MicroCabal for MicroHs
+    <* knownField "mhs-options"
   where
     extract :: CompilerFlavor -> ALens' BuildInfo [String]
     extract flavor = L.options . lookupLens flavor
diff --git a/changelog.d/pr-11344 b/changelog.d/pr-11344
new file mode 100644
index 00000000000..ff17ccfc11d
--- /dev/null
+++ b/changelog.d/pr-11344
@@ -0,0 +1,4 @@
+synopsis: Don't warn on mhs-options
+packages: Cabal-syntax
+issues: #11341
+prs: #11344