Add OSX x86_64 and aarch64 CI builds

.github/workflows/ci.yml

@@ -89,3 +89,30 @@ jobs:
       run: make clean && make linux LINUX_CC=x86_64-w64-mingw32-gcc-10-posix
     - name: 'Run tests with mingw32-posix+wine'
       run: make test TESTWRAPPER=./wine-wrapper
+
+  osx-12-x86_64:
+    runs-on: macos-12
+    steps:
+    - uses: actions/checkout@v4
+    - name: 'Compile with gcc on x86_64'
+      run: make linux
+    - name: 'Run tests with gcc on x86_64'
+      run: make test
+    - name: 'Compile fat binary with gcc on x86_64'
+      run: make clean && make linux LINUX_CC=cc LINUX_CFLAGS='-O2 -DUNIX -arch arm64 -arch x86_64'
+    - name: 'Run tests with fat binary with gcc on x86_64'
+      run: make test
+
+  osx-14-aarch64:
+    runs-on: macos-14
+    steps:
+    - uses: actions/checkout@v4
+    - name: 'Compile with gcc on aarch64'
+      # nroff is now available, so skip the man build
+      run: touch fvcbm.man && make linux
+    - name: 'Run tests with gcc on aarch64'
+      run: make test
+    - name: 'Compile fat binary with gcc on aarch64'
+      run: make clean && make linux LINUX_CC=cc LINUX_CFLAGS='-O2 -DUNIX -arch arm64 -arch x86_64'
+    - name: 'Run tests with fat binary with gcc on aarch64'
+      run: make test