MacOS GitHub Actions Testing

testing...

.github/actions/macos-setup/action.yml

@@ -0,0 +1,18 @@
+name: 'install-macos-prerequisites'
+
+description: 'Install prerequisites for Mac OS compilation'
+
+runs:
+  using: 'composite'
+
+  steps:
+    - name: Install macOS packages
+      shell: bash
+      run: |
+        echo "::group::Install packages"
+        brew reinstall gcc
+        brew install automake
+        brew install netcdf
+        brew install netcdf-fortran
+        brew install mpich
+        echo "::endgroup::"

.github/workflows/macos-compile.yml

@@ -0,0 +1,20 @@
+name: MacOS Compilation Test
+
+on: [push, pull_request]
+
+jobs:
+  compile:
+
+    runs-on: macOS-latest
+
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        submodules: recursive
+
+    - uses: ./.github/actions/macos-setup
+
+    - name: Compile models
+      run: make -j
+
+    # TODO: Run a few of the models and compare parameter.doc files?