结合最近cmake的运用，对cmake的使用做简要总结。主要是关键词，编译思路的理解。

1. cmake编译源码生成可执行文件

思路：

(1) 添加第三方库，链接对应头文件。以opencv为例

set(OpenCV_PATH ${PROJECT_SOURCE_DIR}/../3rdParty/opencv430)
set(OpenCV_INCLUDE_DIRS ${OpenCV_PATH}/include/opencv4
                        ${OpenCV_PATH}/include/opencv4/opencv2)
set(OpenCV_LIBS ${OpenCV_PATH}/lib/libopencv_world.so)
include_directories(${OpenCV_INCLUDE_DIRS})
#最后表示把链接对应的头文件

(2)查找本项目头文件：注意如果头文件包含二级目录，应记得把所有头文件包进来

set(EPCV_INCLUDES ${PROJECT_SOURCE_DIR}/../include
                  ${PROJECT_SOURCE_DIR}/../include/common
                  ${PROJECT_SOURCE_DIR}/../include/epcv_engine)
include_directories(${EPCV_INCLUDES})

(3) 查找源文件：注意如果头文件包含二级目录，应记得把所有头文件包进来

#找到src文件
file(GLOB EPCV_TWO_DIM ${PROJECT_SOURCE_DIR}/../src/epcv_traffic_sign_classifier.cpp
                        ${PROJECT_SOURCE_DIR}/../src/epcv_engine/epcv_traffic_sign_classifier_engine.cpp)

(4)生成可执行文件

#根据src文件生成可执行文件
add_executable(demo_traffic_sign_classifier demo_traffic_sign_classifier.cpp ${EPCV_TWO_DIM} ${SAMPLES_COMMON_SOURCES_FILE})

(5)链接相关第三方库

#链接库文件
target_link_libraries(demo_traffic_sign_classifier  ${OpenCV_LIBS} ${TRTLIBS} ${CUDA_LIBRARIES})

2. cmake 链接动态库生成可执行文件

思路：

(1) 添加第三方库，链接对应头文件（同上）

(2)查找本项目头文件（同上）

(3) 查找已经编译生成的库文件（这里相当于用库文件代替源码）

file(GLOB TRAFFIC_LIBS ${PROJECT_SOURCE_DIR}/../lib/*.so)

(4)生成可执行文件

add_executable(demo_traffic_sign_classifier demo_traffic_sign_classifier.cpp  ${SAMPLES_COMMON_SOURCES_FILE})

(5)链接相关第三方库

#链接库文件
target_link_libraries(demo_traffic_sign_classifier  ${TRAFFIC_LIBS} ${OpenCV_LIBS} ${TRTLIBS} ${CUDA_LIBRARIES})

3. 将源文件编译成动态库

(1) 添加第三方库，链接对应头文件（同上）

(2)查找本项目头文件（同上）

(3)设置生成库的输出路径

set(LIBRARY_OUTPUT_PATH ${PROJECT_SOURCE_DIR}/lib)

(4)编译生成库文件

add_library(${LIB_NAME} SHARED ${SOURCE_FILES_TWO} ${SAMPLES_COMMON_SOURCES_FILE})

(5)链接依赖库

target_link_libraries(${LIB_NAME} ${OpenCV_LIBS} ${TRTLIBS} ${CUDA_LIBRARIES})