Update SDL2 to the latest commit (85bbf8e)

libs/SDL2/.github/workflows/emscripten.yml

@@ -11,6 +11,27 @@ jobs:
         with:
           version: 2.0.27
       - name: Configure CMake
-        run: emcmake cmake -B build
+        run: |
+          emcmake cmake -S . -B build \
+            -DSDL_TESTS=ON \
+            -DSDL_INSTALL_TESTS=ON \
+            -DCMAKE_BUILD_TYPE=Release \
+            -DCMAKE_INSTALL_PREFIX=prefix
       - name: Build
-        run: cmake --build build/
+        run: cmake --build build/ --verbose
+      - name: Run build-time tests
+        run: |
+          set -eu
+          export SDL_TESTS_QUICK=1
+          ctest -VV --test-dir build/
+      - name: Install
+        run: |
+          echo "SDL2_DIR=$(pwd)/prefix" >> $GITHUB_ENV
+          cmake --install build/
+      - name: Verify CMake configuration files
+        run: |
+          emcmake cmake -S cmake/test -B cmake_config_build \
+            -DCMAKE_BUILD_TYPE=Release \
+            -DTEST_SHARED=FALSE \
+            -DCMAKE_PREFIX_PATH=${{ env.SDL2_DIR }}
+          cmake --build cmake_config_build --verbose