turn off long double on apple silicon

Author: egpbos

.github/workflows/build.yml

@@ -15,7 +15,7 @@ jobs:
         runs-on: ${{ matrix.os }}
         strategy:
             matrix:
-                os: [ubuntu-latest, macos-latest, windows-latest]
+                os: [ubuntu-latest, macos-13, macos-latest, windows-latest]
 
         steps:
             - name: Setup MSVC on Windows
@@ -40,7 +40,7 @@ jobs:
               run: |
                   mkdir build
                   cd build
-                  cmake .. -DDOWNLOAD_GTEST=ON 
+                  cmake .. -DDOWNLOAD_GTEST=ON -DFFTW_USE_LONG_DOUBLE=${{ matrix.os == 'macos-latest' && 'OFF' || 'ON' }}
                   cmake --build test
 
             - name: Run tests