Add workflow checking that deployed repository can produce "Hello Wor…

…ld!" executable

.github/scripts/build-hello-world.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+set -e # exit on error
+set -x # echo on
+set -o pipefail # fail of any command in pipeline is an error
+
+# Sanity check of the GCC binary and its version.
+aarch64-w64-mingw32-gcc --version
+
+# Create a simple "Hello, World!" program binary.
+echo '#include <stdio.h>
+int main() {
+  printf("Hello, World!\n");
+  return 0;
+}
+' > hello-world.c
+aarch64-w64-mingw32-gcc -o hello-world.exe hello-world.c

.github/scripts/install-toolchain.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+set -e # exit on error
+set -x # echo on
+set -o pipefail # fail of any command in pipeline is an error
+
+pacman -Syu --noconfirm
+
+# Add WoArm64 custom repository.
+REPO='[woarm64]
+Server = https://windows-on-arm-experiments.github.io/msys2-woarm64-build/x86_64
+SigLevel = Optional
+
+'
+echo -e "$REPO$(cat /etc/pacman.conf)" > /etc/pacman.conf
+
+pacman -Sy --noconfirm
+pacman -S mingw-w64-cross-gcc --noconfirm

.github/workflows/check-repository.yml

@@ -0,0 +1,49 @@
+name: Check MSYS2 repository
+
+on:
+  workflow_dispatch:
+  workflow_call:
+
+jobs:
+  build:
+    runs-on: windows-latest
+    steps:
+      - uses: msys2/setup-msys2@v2
+        with:
+          msystem: MSYS
+          update: true
+
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install toolchain
+        shell: msys2 {0}
+        run: |
+          `cygpath "${{ github.workspace }}"`/.github/scripts/install-toolchain.sh
+
+      - name: Build hello-world.exe
+        shell: msys2 {0}
+        run: |
+          `cygpath "${{ github.workspace }}"`/.github/scripts/build-hello-world.sh
+
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: hello-world
+          path: hello-world.exe
+
+  test:
+    needs: [build]
+    runs-on: [Windows, GCC, ARM64]
+
+    steps:
+      - name: Download artifacts
+        uses: actions/download-artifact@v4
+        with:
+          name: hello-world
+          path: ${{ github.workspace }}\artifacts
+
+      - name: Run hello-world.exe
+        run: |
+          ls ${{ github.workspace }}\artifacts
+          ${{ github.workspace }}\artifacts\hello-world.exe

.github/workflows/main.yml

@@ -473,3 +473,7 @@ jobs:
         uses: actions/deploy-pages@v4
         with:
           artifact_name: woarm64-msys2-repository
+
+  check-repository:
+    needs: [deploy]
+    uses: ./.github/workflows/check-repository.yml