写一个交叉编译aarch64的程序的cmake脚本，这个程序需要链接已经交叉编译好的opencv的库

在编写用于AARCH64架构的交叉编译CMake脚本时，你需要确保环境配置正确，并指明目标平台和依赖库。这里是一个基本的示例，假设你已经有了预编译的OpenCV库：

cmake_minimum_required(VERSION 3.10)
project(MyProject)

# 设置目标平台
set(CMAKE_SYSTEM_NAME Linux)   # 假设是Linux系统
set(CMAKE_SYSTEM_PROCESSOR aarch64)  # AArch64处理器

# 指定交叉编译工具链
set(CMAKE_C_COMPILER /path/to/aarch64-linux-gnu-gcc)
set(CMAKE_CXX_COMPILER /path/to/aarch64-linux-gnu-g++)

# 设定OpenCV库路径
find_path(OPENCV_INCLUDE_DIRS opencv2/opencv.hpp PATHS /path/to/opencv-cross-compiled/include NO_DEFAULT_PATH)
find_library(OPENCV_LIBRARIES opencv_core libopencv_core.a libopencv_highgui.a ... PATHS /path/to/opencv-cross-compiled/lib NO_DEFAULT_PATH)

# 添加依赖项到项目中
target_link_libraries(MyProject
    PRIVATE
        ${OPENCV_LIBRARIES}
)

# 其他设置，如源文件目录等...
set(SOURCE_DIR src)
set(SOURCES
    ${SOURCE_DIR}/main.cpp
    ${SOURCE_DIR}/other_source.cpp
)

add_executable(MyProject ${SOURCES})

# 如果使用Unix Makefile Generator，记得添加这部分
if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
    message(STATUS "Adding default build type 'Debug'")
    add_definitions(-DCMAKE_BUILD_TYPE=Debug)
endif()

# 输出最终构建信息
message(STATUS "Target architecture: AArch64")
message(STATUS "Using OpenCV library from: ${OPENCV_INCLUDE_DIRS} and ${OPENCV_LIBRARIES}")

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