Add macOS & cmake builds to workflow

Author: d-torrance

.github/workflows/build.yml

@@ -2,20 +2,35 @@ name: Build
 on:
   workflow_dispatch:
   pull_request:
-  push:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        build-system:
+          - autotools
+          - cmake
+        os:
+          - macos-latest
+          - ubuntu-latest
     steps:
       - uses: actions/checkout@v6
       - name: Install dependencies
         run: |
-          sudo apt-get install -y libgtest-dev
+          if test ${{ matrix.os }} = ubuntu-latest
+          then sudo apt-get install -y libgtest-dev
+          else brew install autoconf
+          fi
       - name: Build and check memtailor
         run: |
-          mkdir BUILD
-          cd BUILD
-          ../autogen.sh
-          ../configure
-          make distcheck
+          mkdir build-dir
+          cd build-dir
+          if test ${{ matrix.build-system }} = autotools
+          then ../autogen.sh
+               ../configure
+               make distcheck
+          else cmake -B. -S.. -GNinja
+               ninja
+          fi