cmake 从放弃到入门(2)

#Set the location for library installation -- i.e., /usr/lib in this case
# not really necessary in this example. Use "sudo make install" to apply
install(TARGETS testStudent DESTINATION /usr/lib)

两个重要变化：
1. 我们不再使用add_executable() 而是使用add_library()
2. install 指定安装目录，执行sudo make install时动态库将被安装在/usr/lib目录
如前两个例子，我们依次执行，cmake make编译结果如下：

例4：静态库编译 (.a)

基于例3，我们编译一个静态库，代码位置
exploringBB/extras/cmake/studentlib_static/

将CMakeList.txt修改为如下所示：

cmake_minimum_required(VERSION 2.8.9)
project(directory_test)
set(CMAKE_BUILD_TYPE Release)

#Bring the headers, such as Student.h into the project
include_directories(include)

#However, the file(GLOB...) allows for wildcard additions:
file(GLOB SOURCES "src/*.cpp")

#Generate the static library from the sources
add_library(testStudent STATIC ${SOURCES})

#Set the location for library installation -- i.e., /usr/lib in this case
# not really necessary in this example. Use "sudo make install" to apply
install(TARGETS testStudent DESTINATION /usr/li

可以看出，只需将add_library中的shared改为static即可。
编译结果如下：

例5：使用静态库或动态库

下边我们来测试一下我们例3的结果，代码和CMakeList.txt如下：

#include"Student.h"

int main(int argc, char *argv[]){
  Student s("Joe");
  s.display();
  return 0;
}

cmake_minimum_required(VERSION 2.8.9)
project (TestLibrary)

#For the shared library:
set ( PROJECT_LINK_LIBS libtestStudent.so )
link_directories( ~/exploringBB/extras/cmake/studentlib_shared/build )

#For the static library:
#set ( PROJECT_LINK_LIBS libtestStudent.a )
#link_directories( ~/exploringBB/extras/cmake/studentlib_static/build )

include_directories(~/exploringBB/extras/cmake/studentlib_shared/include)

add_executable(libtest libtest.cpp)
target_link_libraries(libtest ${PROJECT_LINK_LIBS} )

结果如下（CMakeList.txt中的目录要根据自己的情况改一下）：

成功了！！

Linux公社的RSS地址：https://www.linuxidc.com/rssFeed.aspx