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Cmake 编译 OpenCV 通用设置

特点：

1. 包括 Contrib 模块
2. 关闭了 Example、Test、OpenCV_App
3. Linux、Windows 均只生成 OpenCV_World

需要注意：

1. 每次把 Cmake 缓存清空，否则，Install 路径可能被设置为默认路径
2. Windows 需要注意编译工具的选择，如果是MinGW，可能需要额外修改，VS的编译器则不需要。

set(BUILD_EXAMPLES      OFF)
set(BUILD_PERF_TESTS    OFF)
set(BUILD_TESTS         OFF)
set(BUILD_opencv_apps   OFF)set(BUILD_TIFF          ON)
set(BUILD_ZLIB          ON)
set(BUILD_JASPER        ON)
set(BUILD_JPEG          ON)
set(BUILD_PNG           ON)set(BUILD_SHARED_LIBS   ON)
set(BUILD_opencv_world  ON)
set(OPENCV_EXTRA_MODULES_PATH ${CMAKE_CURRENT_LIST_DIR}/opencv_contrib-4.8.0/modules CACHE STRING "SELF DEFINED OPENCV_EXTRA_MODULES_PATH")# set install location
if (CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)set(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT OFF)if (UNIX)set(TARGET_PLATFORM "UNIX")elseif (WIN32)set(TARGET_PLATFORM "WIN")endif ()set(CMAKE_INSTALL_PREFIX ${CMAKE_CURRENT_LIST_DIR}/release/${TARGET_PLATFORM})
endif ()add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/opencv-4.8.0)

Find_OpenCV

if (UNIX)set(TARGET_PLATFORM "UNIX")set(OPENCV_LIB opencv_world)set(OPENCV_LIB_FOLDER ${CMAKE_CURRENT_LIST_DIR}/release/UNIX/lib)set(OPENCV_HEADER_FOLDER ${CMAKE_CURRENT_LIST_DIR}/release/UNIX/include/opencv4)elseif (WIN32)set(TARGET_PLATFORM "WIN")set(OPENCV_LIB opencv_world480)set(OPENCV_LIB_FOLDER ${CMAKE_CURRENT_LIST_DIR}/release/WIN/x64/vc17/lib)set(OPENCV_DLL_FOLDER ${CMAKE_CURRENT_LIST_DIR}/release/WIN/x64/vc17/bin)set(OPENCV_HEADER_FOLDER ${CMAKE_CURRENT_LIST_DIR}/release/WIN/include)endif ()