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cmake_minimum_required (VERSION 3.10)
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# 交叉编译相关
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option (USE_CROSS
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"Use CROSSCOMPILE" OFF)
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if (USE_CROSS)
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# 即你目标机target所在的操作系统名称，比如ARM或者Linux你就需要写"Linux",如果Windows平台你就写"Windows",如果你的嵌入式平台没有相关OS你即需要写成"Generic",只有当CMAKE_SYSTEM_NAME这个变量被设置了，CMake才认为此时正在交叉编译，它会额外设置一个变量CMAKE_CROSSCOMPILING为TRUE.
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set(CMAKE_SYSTEM_NAME Linux)
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set(CMAKE_SYSTEM_VERSION 1.0)
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set(CMAKE_SYSTEM_PROCESSOR aarch64)
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# TOOLSCHAIN_PATH 位置一般是bin lib include 和aarch64-...的目录
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set(TOOLSCHAIN_PATH "/home/wcl/emd_dev/n1/openwrt-toolchain-armvirt-64_gcc-8.4.0_musl.Linux-x86_64/toolchain-aarch64_cortex-a53_gcc-8.4.0_musl/")
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set(TOOLCHAIN_HOST "${TOOLSCHAIN_PATH}/bin/aarch64-openwrt-linux")
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# 即C语言编译器，这里可以将变量设置成完整路径或者文件名，设置成完整路径有一个好处就是CMake会去这个路径下去寻找编译相关的其他工具比如linker,binutils等，如果你写的文件名带有arm-elf等等前缀，CMake会识别到并且去寻找相关的交叉编译器。
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set(CMAKE_C_COMPILER ${TOOLCHAIN_HOST}-gcc)
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set(CMAKE_CXX_COMPILER ${TOOLCHAIN_HOST}-g++)
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SET(CMAKE_BUILD_TYPE "Release")
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SET(CMAKE_CXX_FLAGS_DEBUG "$ENV{CXXFLAGS} -O0 -Wall -g2 -ggdb")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -Wall")
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# 代表了一系列的相关文件夹路径的根路径的变更，比如你设置了/opt/arm/,所有的Find_xxx.cmake都会优先根据这个路径下的/usr/lib,/lib等进行查找，然后才会去你自己的/usr/lib和/lib进行查找，如果你有一些库是不被包含在/opt/arm里面的，你也可以显示指定多个值给CMAKE_FIND_ROOT_PATH,比如set(CMAKE_FIND_ROOT_PATH /opt/arm /opt/inst)
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set(CMAKE_FIND_ROOT_PATH ${TOOLSCHAIN_PATH})
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# 对FIND_PROGRAM()起作用,有三种取值，NEVER,ONLY,BOTH,第一个表示不在你CMAKE_FIND_ROOT_PATH下进行查找，第二个表示只在这个路径下查找，第三个表示先查找这个路径，再查找全局路径，对于这个变量来说，一般都是调用宿主机的程序，所以一般都设置成NEVER
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SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
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# 对FIND_LIBRARY()起作用，表示在链接的时候的库的相关选项，因此这里需要设置成ONLY来保证我们的库是在交叉环境中找的.
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SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
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# 对FIND_PATH()和FIND_FILE()起作用，一般来说也是ONLY,如果你想改变，一般也是在相关的FIND命令中增加option来改变局部设置，有NO_CMAKE_FIND_ROOT_PATH,ONLY_CMAKE_FIND_ROOT_PATH,BOTH_CMAKE_FIND_ROOT_PATH
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SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
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# 对于Qt用户来说，需要更改相关的qmake命令切换成嵌入式版本，因此这里需要指定成相应的qmake路径（指定到qmake本身）
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# SET(QT_QMAKE_EXECUTABLE /opt/qt-embedded/qmake)
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# 对于需要boost库的用户来说，相关的boost库路径配置也需要设置，因此这里的路径即ARM下的boost路径，里面有include和lib。
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# SET(BOOST_ROOT /opt/boost_arm)
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# cmake内置命令不区分大小写
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endif (USE_CROSS)
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# 项目名称
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project (dehazing)
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# The version number.
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set (DEHAZE_VERSION_MAJOR 5)
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set (DEHAZE_VERSION_MINOR 0)
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# configure a header file to pass some of the CMake settings
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# to the source code
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configure_file (
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"${PROJECT_SOURCE_DIR}/VersionConfig.h.in"
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"${PROJECT_SOURCE_DIR}/VersionConfig.h"
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)
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# 安装路径
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set(CMAKE_INSTALL_PREFIX "${PROJECT_BINARY_DIR}/install")
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# 链接库路径操作
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set(INSTALL_LIB_DIR $ORIGIN "../lib" "./lib") # 假设安装目录在编译目录的lib子目录内和当前文件夹，这里写成了列表的形式
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set(CMAKE_SKIP_BUILD_RPATH FALSE)
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set(CMAKE_BUILD_WITH_INSTALL_RPATH FALSE)
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set(CMAKE_INSTALL_RPATH "${INSTALL_LIB_DIR}")
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set(CMAKE_INSTALL_RPATH_USE_LINK_PATH FALSE) # 存在上面一句，此句好像没有用
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# Try to find OpenCV
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find_package(OpenCV 3)
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if (OpenCV_FOUND)
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# If the package has been found, several variables will
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# be set, you can find the full list with descriptions
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# in the OpenCVConfig.cmake file.
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# Print some message showing some of them
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message(STATUS "OpenCV library status:")
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message(STATUS " version: ${OpenCV_VERSION}")
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message(STATUS " include path: ${OpenCV_INCLUDE_DIRS}")
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else ()
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message(FATAL_ERROR "Could not locate OpenCV")
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endif()
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# zlog
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option (USE_ZLOG
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"Use tutorial provided math implementation" ON)
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if (USE_ZLOG)
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add_subdirectory (zlog_manager)
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set (EXTRA_INCS ${EXTRA_INCS} ${ZLOG_INCLUDE_DIR})
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message (">>> value = ${EXTRA_INCS}")
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set (EXTRA_LIBS ${EXTRA_LIBS} zlog_manager)
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message (">>> value = ${EXTRA_LIBS}")
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endif (USE_ZLOG)
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# 其他宏定义选项
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option (USE_DEHAZE01
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"Use No. 1 alg" ON)
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if (USE_DEHAZE01)
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add_subdirectory(dehazing01)
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set (EXTRA_INCS ${EXTRA_INCS} ${DEHAZE01_INCLUDE_DIR})
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message (">>> value = ${EXTRA_INCS}")
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set (EXTRA_LIBS ${EXTRA_LIBS} LIB_DEHAZE01)
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message (">>> value = ${EXTRA_LIBS}")
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endif (USE_DEHAZE01)
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# 头文件路径
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include_directories("${PROJECT_SOURCE_DIR}")
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include_directories("${PROJECT_SOURCE_DIR}/zlog_manager/")
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include_directories("${EXTRA_INCS}")
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# 因为是使用add_subdirectory的方式，所以库文件路径不用再加link_directories
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add_executable (dehazing main.cpp)
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target_link_libraries (dehazing ${EXTRA_LIBS} ${OpenCV_LIBS})
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# 安装（库文件安装位置在子cmake文件中指定）
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install (TARGETS dehazing DESTINATION bin)
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install (FILES "VersionConfig.h" DESTINATION include)
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# 测试模式
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# enable_testing()
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# #define a macro to simplify adding tests, then use it
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# macro (do_test arg result)
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# add_test (TutorialComp${arg} Tutorial ${arg})
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# set_tests_properties (TutorialComp${arg}
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# PROPERTIES PASS_REGULAR_EXPRESSION ${result})
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# endmacro (do_test)
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# # do a bunch of result based tests
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# do_test (25 "25 is 5")
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# do_test (-25 "-25 is 0") |