Clang only on linux

Author: toroidal-code

.github/workflows/test.yml

@@ -18,6 +18,9 @@ jobs:
       matrix:
         compiler: [native, llvm]
         os: [ubuntu-latest, windows-latest]
+        exclude:
+          - os: windows-latest
+            compiler: llvm
 
     steps:
     - name: Checkout code
@@ -26,19 +29,14 @@ jobs:
     - name: Install CMake
       uses: lukka/get-cmake@latest
 
-    - name: Use LLVM and Clang for Linux
+    - name: Use LLVM and Clang
       run: |
         echo "CC=clang-18" >> $GITHUB_ENV
         echo "CXX=clang++-18" >> $GITHUB_ENV
-      if: ${{ matrix.os == 'ubuntu-latest' && matrix.compiler != 'native' }}
+      if: ${{ matrix.compiler != 'native' }}
 
-    - name: Configure with Clang for Windows
-      run: cmake -B build -DCPPSPEC_BUILD_TESTS=YES -DCMAKE_C_COMPILER="clang" -DCMAKE_CXX_COMPILER="clang++"
-      if: ${{ matrix.os == 'windows-latest' && matrix.compiler == 'llvm' }}
-
-    - name: Configure with default compiler
-      run: cmake -B build -DCPPSPEC_BUILD_TESTS=YES
-      if: ${{ matrix.compiler == 'native' || matrix.os != 'windows-latest' }}
+    - name: Configure
+      run: cmake -B build -DCPPSPEC_BUILD_TESTS=YES -DCMAKE_C_COMPILER="$CC" -DCMAKE_CXX_COMPILER="$CXX"
 
     - name: Build
       run: cmake --build build --config Release