CI: build on macOS

semu supports conditional compilation on both Linux and macOS. This
can sometimes lead to compilation failures on one platform when only
tested on another. To prevent such issues, automated CI checks ensure
that the code compiles properly before being merged into upstream.

Author: ChinYikMing

.github/workflows/main.yml

@@ -3,14 +3,27 @@ name: CI
 on: [push, pull_request]
 
 jobs:
-  rv32emu:
+  semu-linux:
     runs-on: ubuntu-22.04
     steps:
     - uses: actions/checkout@v4
     - name: install-dependencies
-      run: | 
-            sudo apt-get install build-essential device-tree-compiler
-            sudo apt-get install expect
+      run: |
+            sudo apt-get install build-essential device-tree-compiler expect
+    - name: default build
+      run: make
+      shell: bash
+    - name: automated test
+      run: .ci/autorun.sh
+      shell: bash
+
+  semu-macOS:
+    runs-on: macos-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: install-dependencies
+      run: |
+            brew install make dtc expect e2fsprogs
     - name: default build
       run: make
       shell: bash