1. 下载Clipper2
2. VS打开\Clipper2-main\DLL\CPP_DLL\Clipper2_DLL.sln，编译
3. 配置cmake:

include_directories("E:\\Projects\\***\\Clipper2-main\\CPP\\Clipper2Lib\\include")

add_library(CLipper2 SHARED IMPORTED)
set_target_properties(CLipper2 PROPERTIES
    IMPORTED_IMPLIB "E:\\Projects\\***\\Clipper2-main\\DLL\\CPP_DLL\\x64\\Debug\\Clipper2_64.lib"
    IMPORTED_LOCATION "E:\\Projects\\***\\Clipper2-main\\DLL\\CPP_DLL\\x64\\Debug\\Clipper2_64.all"
)
cmake

4. 使用

#include <iostream>
#include <clipper2/clipper.h>
int main()
{
    std::cout << "The version of Clipper2 is" << CLIPPER2_VERSION <<std::endl;
    return 0;
}
c++