cmake中添加引用动态链接_cmake添加头文件目录，链接动态、静态库

罗列一下cmake常用的命令。

CMake支持大写、小写、混合大小写的命令。

1. 添加头文件目录INCLUDE_DIRECTORIES

语法&＃xff1a;

include_directories([AFTER|BEFORE] [SYSTEM] dir1 [dir2 ...])

它相当于g&＃43;&＃43;选项中的-I参数的作用&＃xff0c;也相当于环境变量中增加路径到CPLUS_INCLUDE_PATH变量的作用。

include_directories(../../../thirdparty/comm/include)

2. 添加需要链接的库文件目录LINK_DIRECTORIES

语法&＃xff1a;

link_directories(directory1 directory2 ...)

它相当于g&＃43;&＃43;命令的-L选项的作用&＃xff0c;也相当于环境变量中增加LD_LIBRARY_PATH的路径的作用。

link_directories("/home/server/third/lib")

3. 查找库所在目录FIND_LIBRARY

语法&＃xff1a;

A short-hand signature is:

find_library ( name1 [path1 path2 ...])

The general signature is:

find_library (

name | NAMES name1 [name2 ...] [NAMES_PER_DIR]

[HINTS path1 [path2 ... ENV var]]

[PATHS path1 [path2 ... ENV var]]

[PATH_SUFFIXES suffix1 [suffix2 ...]]

[DOC "cache documentation string"]

[NO_DEFAULT_PATH]

[NO_CMAKE_ENVIRONMENT_PATH]

[NO_CMAKE_PATH]

[NO_SYSTEM_ENVIRONMENT_PATH]

[NO_CMAKE_SYSTEM_PATH]

[CMAKE_FIND_ROOT_PATH_BOTH |

ONLY_CMAKE_FIND_ROOT_PATH |

NO_CMAKE_FIND_ROOT_PATH]

)

例子如下&＃xff1a;

FIND_LIBRARY(RUNTIME_LIB rt /usr/lib /usr/local/lib NO_DEFAULT_PATH)

cmake会在目录中查找&＃xff0c;如果所有目录中都没有&＃xff0c;值RUNTIME_LIB就会被赋为NO_DEFAULT_PATH

4. 添加需要链接的库文件路径LINK_LIBRARIES

语法&＃xff1a;

link_libraries(library1 library2 ...)

# 直接是全路径

link_libraries(“/home/server/third/lib/libcommon.a”)

# 下面的例子&＃xff0c;只有库名&＃xff0c;cmake会自动去所包含的目录搜索

link_libraries(iconv)

# 传入变量

link_libraries(${RUNTIME_LIB})

# 也可以链接多个

link_libraries("/opt/MATLAB/R2012a/bin/glnxa64/libeng.so"　"/opt/MATLAB/R2012a/bin/glnxa64/libmx.so")

可以链接一个&＃xff0c;也可以多个&＃xff0c;中间使用空格分隔.

5. 设置要链接的库文件的名称TARGET_LINK_LIBRARIES

语法&＃xff1a;

target_link_libraries( [item1 [item2 [...]]]

[[debug|optimized|general] ] ...)

# 以下写法都可以&＃xff1a;

target_link_libraries(myProject comm) # 连接libhello.so库&＃xff0c;默认优先链接动态库

target_link_libraries(myProject libcomm.a) # 显示指定链接静态库

target_link_libraries(myProject libcomm.so) # 显示指定链接动态库

# 再如&＃xff1a;

target_link_libraries(myProject libcomm.so)　　#这些库名写法都可以。

target_link_libraries(myProject comm)

target_link_libraries(myProject -lcomm)

6. 为工程生成目标文件

语法&＃xff1a;

add_executable( [WIN32] [MACOSX_BUNDLE]

[EXCLUDE_FROM_ALL]

source1 [source2 ...])

简单的例子如下&＃xff1a;

add_executable(demo

main.cpp

)

6. 最后贴一个完整的例子

cmake_minimum_required (VERSION 2.6)

INCLUDE_DIRECTORIES(../../thirdparty/comm)

FIND_LIBRARY(COMM_LIB comm ../../thirdparty/comm/lib NO_DEFAULT_PATH)

FIND_LIBRARY(RUNTIME_LIB rt /usr/lib /usr/local/lib NO_DEFAULT_PATH)

link_libraries(${COMM_LIB} ${RUNTIME_LIB})

ADD_DEFINITIONS(

-O3 -g -W -Wall

-Wunused-variable -Wunused-parameter -Wunused-function -Wunused

-Wno-deprecated -Woverloaded-virtual -Wwrite-strings

-D__WUR&＃61; -D_REENTRANT -D_FILE_OFFSET_BITS&＃61;64 -DTIXML_USE_STL

)

add_library(lib_demo

cmd.cpp

global.cpp

md5.cpp

)

link_libraries(lib_demo)

add_executable(demo

main.cpp

)

# link library in static mode

target_link_libraries(demo libuuid.a)

另外&＃xff0c;使用cmake生成makefile之后&＃xff0c;make edit_cache可以编辑编译选项。

不熟悉的命令可以去查找文档&＃xff0c;贴个cmake3.0官方帮助文档地址

https://cmake.org/cmake/help/v3.0/index.html