CMake学习笔记

1
2
3
4
5
6
7

                +-------->ImageLoadModule(gdi+、stb_image.h、libgif、naosvg、skia、freeimage等)，加载磁盘上的图片资源到内存中
                |
                |
ImageConverter--|--------->AutoCompleteModule(linenoise、readline等)，为CLI程序提供命令自动补全的功能
                |
                |
                +-------->ImageSaveModule(gdi+、stb_image_write.h、freeimage等)，将内存中的图片数据保存到磁盘

1
2
3
4
5
6
7
8

# 指定cmake的最小版本
cmake_minimum_required(VERSION 2.8)
# 指定工程名称，ImageConverter.sln
project(ImageConverter)
# 搜索当前目录下的源码文件，用srcs存储起来
aux_source_directory(. srcs)
# 配置一个可执行文件项目，ImageConverterDemo.vcxproj
add_executable(ImageConverterDemo ${srcs})

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40

# 指定cmake的最小版本
cmake_minimum_required(VERSION 2.8)

# 指定工程名称，ImageConverter.sln
project(ImageConverter)

# 搜索目录下的源码文件
aux_source_directory(. srcs)

FILE(GLOB_RECURSE coresrcs 
    ./core/*.cpp
)

FILE(GLOB_RECURSE miscsrcs 
    ./misc/*.cpp
)

# 搜索目录下的头文件
FILE(GLOB_RECURSE coreheaders 
    ./core/*.h
)

FILE(GLOB_RECURSE mischeaders 
    ./misc/*.h
)

# 添加到项目筛选器上
source_group("src" FILES ${srcs})
source_group("src\\core" FILES ${coresrcs})
source_group("src\\misc" FILES ${miscsrcs})

source_group("include\\misc" FILES ${mischeaders}) 
source_group("include\\core" FILES ${coreheaders}) 

# 添加头文件搜索路径
include_directories(./core)
include_directories(./misc)

# 配置一个可执行文件项目，ImageConverterDemo.vcxproj
add_executable(ImageConverterDemo ${srcs} ${coresrcs} ${miscsrcs} ${coreheaders} ${mischeaders})

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59

# 指定cmake的最小版本
cmake_minimum_required(VERSION 2.8)

# 指定工程名称，ImageConverter.sln
project(ImageConverter)

# 配置版本号
set (APP_VERSION_MAJOR 1)
set (APP_VERSION_MINOR 0)

# 配置是否开启SVG的支持
option (SUPPORT_SVG_TYPE "support .svg file" ON)  

# 加入一个配置头文件，用于处理 CMake 对源码的设置
configure_file (
  "${PROJECT_SOURCE_DIR}/config.h.in"
  "${PROJECT_SOURCE_DIR}/config.h"
 )

aux_source_directory(. srcs)
source_group("src" FILES ${srcs})

FILE(GLOB_RECURSE coresrcs 
    ./core/*.cpp
)
source_group("src\\core" FILES ${coresrcs})

FILE(GLOB_RECURSE miscsrcs 
    ./misc/*.cpp
)
source_group("src\\misc" FILES ${miscsrcs})

FILE(GLOB_RECURSE coreheaders 
    ./core/*.h
)
source_group("include\\core" FILES ${coreheaders}) 

FILE(GLOB_RECURSE mischeaders 
    ./misc/*.h
)
source_group("include\\misc" FILES ${mischeaders}) 

if(SUPPORT_SVG_TYPE)
FILE(GLOB_RECURSE nanosvgheaders 
    ./modules/nanosvg/src/*.h
    ./modules/nanosvg/example/*.h
)
source_group("modules\\include\\nanosvg" FILES ${nanosvgheaders}) 
include_directories(./modules/nanosvg/src)
include_directories(./modules/nanosvg/example)
add_definitions(-DSUPPORT_SVG_TYPE)
endif(SUPPORT_SVG_TYPE)

# 添加头文件搜索路径
include_directories(./core)
include_directories(./misc)

# 配置一个可执行文件项目，ImageConverterDemo.vcxproj
add_executable(ImageConverterDemo ${srcs} ${coresrcs} ${miscsrcs} ${coreheaders} ${mischeaders} ${nanosvgheaders})

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31

### 这里仅仅截取CMakeLists.txt的FreeImage配置相关代码段
SET(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake)

FIND_PACKAGE(FREEIMAGEX32)
IF(FREEIMAGEX32_FOUND)
    include_directories(${FREEIMAGEX32_INCLUDE_DIR})
    FILE(GLOB_RECURSE freeimageheaders 
        ${FREEIMAGEX32_INCLUDE_DIR}/*.h
    )
    source_group("include\\freeimage" FILES ${freeimageheaders}) 
    if (FREEIMAGEX32_STATICLIB)
        add_executable(ImageConverterForFreeImage 
            ${srcs} 
            ${coresrcs} 
            ${miscsrcs} 
            ${coreheaders} 
            ${mischeaders} 
            ${freeimageheaders}
            ${nanosvgheaders})

        set_target_properties(ImageConverterForFreeImage PROPERTIES COMPILE_DEFINITIONS "SUPPORT_FREEIMAGE")
        target_link_libraries(ImageConverterForFreeImage ${FREEIMAGEX32_STATICLIB})
        add_custom_command(TARGET ImageConverterForFreeImage POST_BUILD        # Adds a post-build event to MyTest
            COMMAND ${CMAKE_COMMAND} -E copy_if_different  # which executes "cmake - E copy_if_different..."
                "${FREEIMAGEX32_SHAREDLIB}"      # <--this is in-file
                "${PROJECT_SOURCE_DIR}/bin/$<CONFIGURATION>"
                )
    endif(FREEIMAGEX32_STATICLIB)
else(FREEIMAGEX32_FOUND)    
    MESSAGE(status "没有找到FreeImage哦，不生成此工程啦") 
ENDIF(FREEIMAGEX32_FOUND)

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25

### FindFREEIMAGEX32.cmake，此文件是配合Find_Package指令来使用的，目的是搜索指定路径
### 看FreeImage开发包是否完整，一般而言，FindXXX.cmake是会主动生成一些静态库、动态库项目的
### 当然，这是由源码的前提了，这里是借助了第三方提供的工具包，因此显得有点绕
# 设置查找路径
set (search_header  ${PROJECT_SOURCE_DIR}/modules/FreeImage/x32)
set (search_staticlib ${PROJECT_SOURCE_DIR}/modules/FreeImage/x32)
set (search_sharedlib ${PROJECT_SOURCE_DIR}/modules/FreeImage/x32)

# 搜索头文件
FIND_PATH(FREEIMAGEX32_INCLUDE_DIR FreeImage.h ${search_header})

# 搜索链接库
FILE(GLOB_RECURSE FREEIMAGEX32_STATICLIB ${search_staticlib}/FreeImage.lib)

# 搜索dll
FILE(GLOB_RECURSE FREEIMAGEX32_SHAREDLIB ${search_sharedlib}/FreeImage.dll)

IF (FREEIMAGEX32_INCLUDE_DIR AND FREEIMAGEX32_STATICLIB AND FREEIMAGEX32_SHAREDLIB)
    SET(FREEIMAGEX32_FOUND TRUE)
ENDIF (FREEIMAGEX32_INCLUDE_DIR AND FREEIMAGEX32_STATICLIB AND FREEIMAGEX32_SHAREDLIB)

# 删除临时变量
unset(search_header)
unset(search_staticlib)
unset(search_sharedlib)

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13

if (MSVC)
    set(CompilerFlags
        CMAKE_CXX_FLAGS
        CMAKE_CXX_FLAGS_DEBUG
        CMAKE_CXX_FLAGS_RELEASE
        CMAKE_C_FLAGS
        CMAKE_C_FLAGS_DEBUG
        CMAKE_C_FLAGS_RELEASE
        )
    foreach(CompilerFlag ${CompilerFlags})
        string(REPLACE "/MD" "/MT" ${CompilerFlag} "${${CompilerFlag}}")
    endforeach()
endif(MSVC)

1
2

cd build/
cmake --build .