cmake 头文件 库文件 链接库
原文地址:http://www.cnblogs.com/binbinjx/p/5626916.html
1. 添加头文件目录INCLUDE_DIRECTORIES
语法:
include_directories([AFTER|BEFORE] [SYSTEM] dir1 [dir2 ...])
它相当于g++选项中的-I参数的作用,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:
link_directories(directory1 directory2 ...)
它相当于g++命令的-L选项的作用,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:
A short-hand signature is: find_library (<VAR> name1 [path1 path2 ...]) The general signature is: find_library ( <VAR> 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:
FIND_LIBRARY(RUNTIME_LIB rt /usr/lib /usr/local/lib NO_DEFAULT_PATH)
cmake会在目录中查找,如果所有目录中都没有,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:
link_libraries(library1 <debug | optimized> library2 ...)
# 直接是全路径 link_libraries(“/home/server/third/lib/libcommon.a”)
# 下面的例子,只有库名,cmake会自动去所包含的目录搜索 link_libraries(iconv) # 传入变量 link_libraries(${RUNTIME_LIB})
# 也可以链接多个 link_libraries("/opt/MATLAB/R2012a/bin/glnxa64/libeng.so" "/opt/MATLAB/R2012a/bin/glnxa64/libmx.so")
可以链接一个,也可以多个,中间使用空格分隔.
5. 设置要链接的库文件的名称TARGET_LINK_LIBRARIES
语法:
target_link_libraries(<target> [item1 [item2 [...]]]
[[debug|optimized|general] <item>] ...)
# 以下写法都可以: target_link_libraries(myProject comm) # 连接libhello.so库,默认优先链接动态库 target_link_libraries(myProject libcomm.a) # 显示指定链接静态库 target_link_libraries(myProject libcomm.so) # 显示指定链接动态库 # 再如: target_link_libraries(myProject libcomm.so) #这些库名写法都可以。 target_link_libraries(myProject comm) target_link_libraries(myProject -lcomm)
6. 为工程生成目标文件
语法:
add_executable(<name> [WIN32] [MACOSX_BUNDLE] [EXCLUDE_FROM_ALL] source1 [source2 ...])
简单的例子如下:
add_executable(demo main.cpp )
6. 最后贴一个完整的例子
cmake_minimum_required (VERSION 2.6) INCLUDE_DIRECTORIES(../../thirdparty/comm) FIND_LIBRARY(COMM_LIB comm ../../thirdparty/comm/lib NO_DEFAULT_PATH) FIND_LIBRARY(RUNTIME_LIB rt /usr/lib /usr/local/lib NO_DEFAULT_PATH) link_libraries(${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= -D_REENTRANT -D_FILE_OFFSET_BITS=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,使用cmake生成makefile之后,make edit_cache可以编辑编译选项。
不熟悉的命令可以去查找文档,贴个cmake3.0官方帮助文档地址
https://cmake.org/cmake/help/v3.0/index.html