CMakeLists多目錄通用模板

CMake不僅具有跨平臺（一次編寫，多次編譯）的特點，還有便於工程管理的特點，支援CMake的IDE也有很多（VS[MS]，QT，CodeBlock等）。

以一個通用組織的工程（包含PCL，VTK，libLAS第三方庫）為示例，具有含義從英語意思進行理解

工程樹狀圖
├── Calibration
│ ├── CMakeLists.txt
│ ├── include
│ │ ├── calibration.h
│ │ └── modelfitting.h
│ └── src
│ ├── calibration.cpp
│ └── modelfitting.cpp
├── CMakeLists.txt
├── CMakeLists.txt.user
├── IO
│ ├── CMakeLists.txt
│ ├── include
│ │ └── PointCloudIO.h
│ └── src
│ └── PointCloudIO.cpp
└── test
├── CMakeLists.txt
└── main.cpp

• 頂層CMakeList.txt

cmake_minimum_required (VERSION 3.5 FATAL_ERROR)
project(Calibration)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
set(CMAKE_INCLUDE_CURRENT_DIR ON)
set(CMAKE_BUILD_TYPE Debug)

find_package (VTK REQUIRED)
find_package (PCL REQUIRED)
find_package (libLAS REQUIRED)
include_directories
 
 (${PCL_INCLUDE_DIRS})
include_directories (${libLAS_INCLUDE_DIRS})
link_directories    (${PCL_LIBRARY_DIRS})
add_definitions     (${PCL_DEFINITIONS})


include_directories(${PROJECT_SOURCE_DIR}/)
link_directories(${PROJECT_BINARY_DIR}/libs)


set(LIBRARY_OUTPUT_PATH ${PROJECT_BINARY_DIR}/libs)
set(EXECUTABLE_OUTPUT_PATH ${PROJECT_BINARY_DIR}
 
/libs)

add_subdirectory(Calibration)
add_subdirectory(IO)
add_subdirectory(test)

• calibration 目錄

project(Calibration)

set(srcs src/calibration.cpp
         src/modelfitting.cpp)
set(incs include/calibration.h
         include/modelfitting.h)

include_directories("include")
add_library(calibration SHARED ${incs}  ${srcs})
target_link_libraries (calibration ${PCL_LIBRARIES} ${VTK_LIBRARIES})

• io 目錄

project(Calibration)

set(srcs src/PointCloudIO.cpp)
set(incs include/PointCloudIO.h)

include_directories("include")
add_library(pointcloudio SHARED ${incs}  ${srcs})
target_link_libraries (pointcloudio ${PCL_LIBRARIES} ${VTK_LIBRARIES} ${libLAS_LIBRARIES})

• test 目錄

project(Calibration)

add_executable(unitest main.cpp)
target_link_libraries(unitest calibration pointcloudio)

Windows和Linux在動態庫的編寫上存在區別，為了相容性，以下面程式碼為例：

/**
 * Point Cloud IO
 * Author: zfluo
 * 2017.3.1
 */

#ifndef POINT_CLOUD_IO
#define POINT_CLOUD_IO

#ifdef _WIN64
#ifdef EXPORT_DLL
#define POINTIO_API __declspec(dllexport)
#else
#define POINTIO_API __declspec(dllimport)
#endif
#else
#define POINTIO_API 
#endif

#include <string>
#include <iostream>

#include <pcl/point_cloud.h>
#include <pcl/point_types.h>

class PointCloudIOPrivate;

class POINTIO_API PointCloudIO
{
...
}
#endif