cmake之find_library

附上工程源码

demo工程

PS：这个工程用于导出库

CMakeLists.txt

cmake_minimum_required(VERSION 3.5)

project(demo LANGUAGES CXX)

set(CMAKE_INCLUDE_CURRENT_DIR ON)
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

add_library(demo SHARED
  demo.cpp
  demo.h
)

target_compile_definitions(demo PRIVATE DEMO_LIBRARY)

demo.h

#ifndef DEMO_H
#define DEMO_H

class Demo
{
public:
    Demo();

    void Print();
};

#endif // DEMO_H

demo.cpp

#include "demo.h"
#include 

Demo::Demo()
{
}

void Demo::Print()
{
    std::cout << "this is a demo" << std::endl;
}

find-library工程

PS：这个工程用于链接demo库

CMakeLists.txt

cmake_minimum_required(VERSION 3.5)

project(find-library LANGUAGES CXX)

set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

include_directories(${CMAKE_CURRENT_SOURCE_DIR}/inc)

find_library(LIB_DEMO demo ${CMAKE_CURRENT_SOURCE_DIR}/lib)

add_executable(${PROJECT_NAME} main.cpp)

target_link_libraries(${PROJECT_NAME} ${LIB_DEMO})

main.cpp

#include 
#include "demo.h"

using namespace std;

int main()
{
    Demo d;
    d.Print();
    return 0;
}

问题情形

首先这两个工程在Linux下使用没有问题的，find-library工程编译正常，可以正确链接demo库；但是在Windows平台就死活不行了，find-library工程CMakeLists.txt第10行老是报错提示demo库找不到

LIB_DEMO
    linked by target "find-library" in directory E:/workspace/daily-project/cpp/find-library

但明明是把demo工程生成的库拷贝到find-library工程的lib目录下了，为啥就是死活会报错？Windows难道对库文件的格式有要求？于是尝试把demo工程的CMakeLists.txt第9行SHARED改成STATIC，重新编译demo，再把生成的静态库文件demo.lib拷贝到find-library工程的lib目录下，重新编译该工程却出乎意料的成功了！但参考官网find_library的用法却没有得到解析

总结

下次写跨平台编译的代码的时候记得在cmake上面配置生成不同类型的库