Improve OpenHarmony toolchain detection in CI build

Enhanced the build workflow to dynamically locate the OpenHarmony toolchain file based on available API level directories in the SDK. Updated CMake configuration to use the detected toolchain path, improving compatibility with different SDK structures and simplifying the setup process.

Author: lijy91

.github/workflows/build.yml

@@ -182,37 +182,36 @@ jobs:
       - name: Setup build environment
         run: |
           SDK_DIR=$(pwd)/sdk
+          
+          # Find the API level directory (usually "20" or similar)
+          API_LEVEL=$(ls -1 $SDK_DIR | grep -E '^[0-9]+$' | head -1)
+          if [ -z "$API_LEVEL" ]; then
+            # Fallback to direct native/ structure
+            OHOS_NATIVE_TOOLCHAIN="$SDK_DIR/native/build/cmake/ohos.toolchain.cmake"
+          else
+            OHOS_NATIVE_TOOLCHAIN="$SDK_DIR/$API_LEVEL/native/build/cmake/ohos.toolchain.cmake"
+          fi
+          
           echo "OHOS_NDK_HOME=$SDK_DIR" >> $GITHUB_ENV
           echo "OHOS_SDK_PATH=$SDK_DIR" >> $GITHUB_ENV
-          ls -la $SDK_DIR/native/ || true
-          ls -la $SDK_DIR/native/build/ || true
-          ls -la $SDK_DIR/native/build/cmake/ || true
+          echo "OHOS_NATIVE_TOOLCHAIN=$OHOS_NATIVE_TOOLCHAIN" >> $GITHUB_ENV
+          
+          # Debug: Show SDK structure
+          echo "SDK structure:"
+          ls -la $SDK_DIR/ || true
+          echo "Looking for toolchain at: $OHOS_NATIVE_TOOLCHAIN"
+          ls -la $OHOS_NATIVE_TOOLCHAIN || true
 
       - name: Configure CMake for OpenHarmony
         shell: bash
         run: |
           mkdir build-ohos
           cd build-ohos
 
-          # Find ninja executable
-          NINJA=$(which ninja)
-          echo "Found ninja at: $NINJA"
-
-          # Debug: Check SDK structure
-          echo "SDK structure:"
-          ls -la $OHOS_SDK_PATH/native/ || true
-          echo "Toolchain file:"
-          cat $OHOS_SDK_PATH/native/build/cmake/ohos.toolchain.cmake | head -150 || true
-
-          # Configure CMake with OpenHarmony toolchain (ARM64 only)
-          cmake .. \
-            -DCMAKE_SYSTEM_NAME=OHOS \
-            -DCMAKE_TOOLCHAIN_FILE=$OHOS_SDK_PATH/native/build/cmake/ohos.toolchain.cmake \
-            -DOHOS_ARCH=aarch64 \
-            -DCMAKE_ANDROID_ARCH_ABI=arm64-v8a \
-            -DCMAKE_BUILD_TYPE=Release \
-            -DCMAKE_MAKE_PROGRAM=$NINJA \
-            -G Ninja
+          # Configure CMake with OpenHarmony toolchain
+          cmake -DCMAKE_SYSTEM_NAME=OHOS \
+                -DCMAKE_TOOLCHAIN_FILE="$OHOS_NATIVE_TOOLCHAIN" \
+                ..
 
       - name: Build Examples
         shell: bash