cmake的链接共享库在Windows [英] cmake link shared library on Windows

查看：1126 发布时间：2016/8/16 12:41:34 windows build cmake

本文介绍了cmake的链接共享库在Windows的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

有3个文件[ M.C 莫氏硬度 的main.c 。

莫氏硬度

// m.h
int m();

M.C

// m.c
#include <stdio.h>
#include "m.h"

int m(){
    printf("Hello,m!\n");
    return 0;
}

的main.c

main.c

// main.c
#include "m.h"
int main(){
    return m();
}

虽然我preFER共享库（m.dll），我做了的CMakeLists.txt

While I prefer shared library(m.dll), I've made the CMakeLists.txt

    PROJECT("app1")
    ADD_LIBRARY(m SHARED m.c)
    ADD_EXECUTABLE(myexe main.c)
    TARGET_LINK_LIBRARIES(myexe m)

CMake的配置完成，生成处理完毕。打开app1.sln和建筑与Visual Studio，它崩溃为 LNK1104：无法打开文件调试\\ m.lib。它只能作为静态是在 ADD_LIBRARY（）。可以解释为什么它不能在Windows工作？

CMake configuration done and generated done. Opening app1.sln and building with Visual Studio , it crashes as LNK1104:Can't open file "Debug\m.lib". It only works as STATIC at ADD_LIBRARY().Can explain why it doesn't work on Windows?

如果我得到了另一共享库（中是指mylib.dll），我怎么可以调用它的功能在我的main.c中和的CMakeLists.txt文件？

If I got another shared library(mylib.dll),how could I invoke its functions in my main.c and CMakeLists.txt file?

推荐答案

有不同的平台上还需要一些额外的code链接的动态库之间的差异。好消息是，CMake的可以帮助你与此有关。我发现通过的Gernot Klingler的的非常有用的：

There are differences between dynamic library linking on different platforms which also needs some additional code. The good news is, that CMake can help you with this. I found the following blog post by Gernot Klingler very useful:

创建和不同的操作系统上使用共享库具有不同的编译器

Creating and using shared libraries with different compilers on different operating systems

总之你需要一些出口preFIX不管什么在莫氏硬度声明定义。否则，构建过程将不会产生导入库的静态链接名为 m.lib （见的 CMAKE_IMPORT_LIBRARY_SUFFIX ）。

In short you need some "export prefix" defined for whatever is declared in m.h. Otherwise the build process will not generate an "import library" for statically linking named m.lib (see also CMAKE_IMPORT_LIBRARY_SUFFIX).

下面是你的code与修改需要：

Here is your code with the modifications needed:

莫氏硬度

#include "m_exports.h"

int M_EXPORTS m();

M.C

#include "m.h"
#include <stdio.h>

int m(){
    printf("Hello,m!\n");
    return 0;
}

的CMakeLists.txt

cmake_minimum_required(VERSION 3.0)

include(GenerateExportHeader)

PROJECT("app1")

INCLUDE_DIRECTORIES("${CMAKE_CURRENT_BINARY_DIR}")
ADD_LIBRARY(m SHARED m.c m.h m_exports.h)
GENERATE_EXPORT_HEADER(m           
    BASE_NAME m
    EXPORT_MACRO_NAME M_EXPORTS
    EXPORT_FILE_NAME m_exports.h
    STATIC_DEFINE SHARED_EXPORTS_BUILT_AS_STATIC)

ADD_EXECUTABLE(myexe main.c)
TARGET_LINK_LIBRARIES(myexe m)

其他参考