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: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(${RUNTIME_LIB})
# 也可以链接多个
link_libraries("/opt/MATLAB/R2012a/bin/glnxa64/libeng.so" "/opt/MATLAB/R2012a/bin/glnxa64/libmx.so")
可以链接一个,也可以多个,中间使用空格分隔.
5. 设置要链接的库文件的名称TARGET_LINK_LIBRARIES
语法:target_link_libraries(<target> [item1 [item2 [...]]] [[debug|optimized|general] <item>] ...)
# 以下写法都可以:
target_link_libraries(myProject comm) # 连接libhello.so库,默认优先链接动态库
target_link_libraries(myProject libcomm.a) # 显示指定链接静态库
target_link_libraries(myProject libcomm.so) # 显示指定链接动态库# 再如:
target_link_libraries(myProject libcomm.so) #这些库名写法都可以。
target_link_libraries(myProject comm)
target_link_libraries(myProject -lcomm)
6. 为工程生成目标文件
语法:add_executable(<name> [WIN32] [MACOSX_BUNDLE] [EXCLUDE_FROM_ALL] source1 [source2 ...])
简单的例子如下:add_executable(demo main.cpp )
7. 最后贴一个完整的例子
cmake_minimum_required (VERSION 2.6)INCLUDE_DIRECTORIES(../../thirdparty/comm)FIND_LIBRARY(COMM_LIB comm ../../thirdparty/comm/lib NO_DEFAULT_PATH)
FIND_LIBRARY(RUNTIME_LIB rt /usr/lib /usr/local/lib NO_DEFAULT_PATH)link_libraries(${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_democmd.cppglobal.cppmd5.cpp
)link_libraries(lib_demo)
add_executable(demomain.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