Fix build and boot with modern GCC

.github/workflows/build.yml

@@ -0,0 +1,63 @@
+name: Build & Release
+
+on:
+  push:
+    tags:
+      - 'v*'
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install ARM toolchain
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y gcc-arm-none-eabi
+
+      - name: Install mk8900image dependencies
+        run: |
+          sudo apt-get install -y libpng-dev libssl-dev zlib1g-dev
+
+      - name: Build all release targets
+        run: |
+          RELEASE_TARGETS="iPhone2G iPhone3G iPodTouch1G iPodTouch2G iPhone3GS iPhone4 iPad1G iPodTouch4G aTV2G"
+          for target in $RELEASE_TARGETS; do
+            echo "::group::Building $target"
+            make "$target"
+            echo "::endgroup::"
+          done
+
+      - name: Build installer targets
+        run: |
+          INSTALLER_TARGETS="iPhone2G-Installer iPhone3G-Installer iPodTouch1G-Installer"
+          for target in $INSTALLER_TARGETS; do
+            echo "::group::Building $target"
+            make "$target"
+            echo "::endgroup::"
+          done
+
+      - name: Collect artifacts
+        run: |
+          mkdir -p dist
+          cp *.img3 *.bin dist/ 2>/dev/null || true
+          ls -la dist/
+
+      - name: Upload build artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: openiboot-images
+          path: dist/
+
+      - name: Create GitHub Release
+        if: startsWith(github.ref, 'refs/tags/')
+        uses: softprops/action-gh-release@v2
+        with:
+          files: dist/*
+          generate_release_notes: true

.gitignore

@@ -1,4 +1,4 @@
-.sconsign.dblite
+build/
 *.img3
 *.img2
 *.bin