From 623a41ba5508ff5a471ac691dd121854cca9614a Mon Sep 17 00:00:00 2001
From: Dan Bonachea <dobonachea@lbl.gov>
Date: Wed, 16 Sep 2026 10:40:30 -0700
Subject: [PATCH] CI: Add coverage for Apple Clang

---
 .github/workflows/build.yml | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 27c7f792f..e5de6937e 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -79,6 +79,21 @@ jobs:
             version: 12 # no package available for gcc 13+
             conduits: *ubuntu_conduits
 
+          # --- Apple clang coverage ---
+
+          - os: macos-15
+            compiler: apple-clang
+            version: 17
+          - os: macos-15-intel
+            compiler: apple-clang
+            version: 17
+          - os: macos-26
+            compiler: apple-clang
+            version: 21
+          - os: macos-26-intel
+            compiler: apple-clang
+            version: 21
+
           # --- LLVM clang coverage ---
 
           - os: macos-15
@@ -165,7 +180,7 @@ jobs:
 
     env:
       COMPILER_VERSION: ${{ matrix.version }}
-      CC: ${{ matrix.compiler }}
+      CC: ${{ matrix.compiler == 'apple-clang' && 'clang' || matrix.compiler }}
       CFLAGS: ${{ matrix.cflags }}
       CXXFLAGS: ${{ matrix.cxxflags }}
       LDFLAGS: ${{ matrix.ldflags }}