first commit

app/CMakeLists.txt

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+# ============================================================================
+# app —— 主可执行程序
+# 编排流程：1. 从 network_camera_receiver 取最新帧；
+#           2. 调用 libfacedetection 检测；
+#           3. 绘制并显示结果。
+# ============================================================================
+
+add_executable(face_detection_app
+    src/main.cpp
+)
+
+# 链接动态库 facedetection（传递其 PUBLIC include 目录）与静态库 receiver
+target_link_libraries(face_detection_app PRIVATE
+    facedetection
+    network_camera_receiver
+    ${OpenCV_LIBS}
+)
+
+# 将项目根目录作为宏传给代码，便于用绝对路径访问 resources 等资源文件
+target_compile_definitions(face_detection_app PRIVATE
+    SOURCE_ROOT="${CMAKE_SOURCE_DIR}"
+)
+
+if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
+    target_compile_options(face_detection_app PRIVATE -O3)
+elseif(MSVC)
+    target_compile_options(face_detection_app PRIVATE /O2)
+endif()