C++ CMake - 创建一个静态库
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CMake - Creating a static library
提问by Hatefiend
I have two files in my project called Test4:
我的项目中有两个文件，名为Test4：
Structure.hStructure.c
Structure.hStructure.c
I want to create a static library that can be loaded by other projects who want to use those files. Here is my CMake file currently:
我想创建一个静态库，可以由想要使用这些文件的其他项目加载。这是我目前的 CMake 文件：
cmake_minimum_required(VERSION 3.6)
project(Test4)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
set(SOURCE_FILES Structure.c Structure.h)
add_library(Test4 STATIC ${SOURCE_FILES})
When I build using that CMake file, no static library is generated. Nothing happens. Am I doing something wrong?
当我使用该 CMake 文件构建时，不会生成任何静态库。没发生什么事。难道我做错了什么？
I am using the CLion IDE.
我正在使用 CLion IDE。
回答by ndeubert
The add_library line should be all you need. See this example code I just wrote to test out creating one and then using it (on Ubuntu 16.04):
add_library 行应该是您所需要的。请参阅我刚刚编写的示例代码来测试创建一个然后使用它（在 Ubuntu 16.04 上）：
Structure.h:
结构.h：
int sum( int a, int b );
Structure.c:
结构.c：
int sum( int a, int b ) {
return a + b;
}
Main.c:
主文件：
#include <stdio.h>
#include "Structure.h"
int main() {
int a = 5;
int b = 8;
int c = sum( a, b );
printf( "sum of %d and %d is %d\n", a, b, c );
return 0;
}
CMakeLists.txt:
CMakeLists.txt：
# CMake instructions to make the static lib
ADD_LIBRARY( MyStaticLib STATIC
Structure.c )
# CMake instructions to test using the static lib
SET( APP_EXE StaticTest )
ADD_EXECUTABLE( ${APP_EXE}
Main.c )
TARGET_LINK_LIBRARIES( ${APP_EXE}
MyStaticLib )
And then here is the output from running it:
然后这是运行它的输出：
nick@dusseldorf:~/code/cmake/static_lib$ ls
CMakeLists.txt Main.c Structure.c Structure.h
nick@dusseldorf:~/code/cmake/static_lib$ cmake .
-- The C compiler identification is GNU 5.4.0
-- The CXX compiler identification is GNU 5.4.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Configuring done
-- Generating done
-- Build files have been written to: /home/nick/code/cmake/static_lib
nick@dusseldorf:~/code/cmake/static_lib$ ls
CMakeCache.txt CMakeFiles cmake_install.cmake CMakeLists.txt Main.c Makefile Structure.c Structure.h
nick@dusseldorf:~/code/cmake/static_lib$ make
Scanning dependencies of target MyStaticLib
[ 25%] Building C object CMakeFiles/MyStaticLib.dir/Structure.c.o
[ 50%] Linking C static library libMyStaticLib.a
[ 50%] Built target MyStaticLib
Scanning dependencies of target StaticTest
[ 75%] Building C object CMakeFiles/StaticTest.dir/Main.c.o
[100%] Linking C executable StaticTest
[100%] Built target StaticTest
nick@dusseldorf:~/code/cmake/static_lib$ ls
CMakeCache.txt cmake_install.cmake libMyStaticLib.a Makefile Structure.c
CMakeFiles CMakeLists.txt Main.c StaticTest Structure.h
nick@dusseldorf:~/code/cmake/static_lib$ ./StaticTest
sum of 5 and 8 is 13
回答by noobar
I had same issue. What I missed is the location where build files are created.
我有同样的问题。我错过的是创建构建文件的位置。
CLion makes libraries or exectables under cmake-build-*directory. IfBuild, Execution, Deployment > CMake > Configurationis Debug, the lib file (.a) is created under cmake-build-debug.
CLion 在cmake-build-*目录下制作库或可执行文件。如果Build, Execution, Deployment > CMake > Configuration是Debug，.a则在cmake-build-debug.
回答by Layne Liu
After you use command cmake .Then the Makefile will have the option like make default_target, revoke it and then you get a .a file in you r directory. Visit https://cmake.org/cmake/help/v3.0/command/add_library.htmlwill help you!
使用命令cmake 后。然后 Makefile 将有像make default_target这样的选项，撤销它，然后你会在你的 r 目录中得到一个 .a 文件。访问https://cmake.org/cmake/help/v3.0/command/add_library.html会帮助你！
