1.无法打开包括文件: “Eigen/Core”:
去github上下载最新的源码
2. "The Eigen/Array header does no longer exist in Eigen3. All that functionality has moved to Eigen/Core."
把Eigen/Array文件删掉
参考：https://github.com/MRPT/mrpt/issues/225
3.编译好lib后，新建工程，测试ceres库能否使用，报错
1>ceressolver.obj : error LNK2001: 无法解析的外部符号 "__declspec(dllimport) public: void __cdecl google::LogMessageVoidify::operator&(class std::basic_ostream<char,struct std::char_traits<char> > &)" (__imp_??ILogMessageVoidify@google@@QEAAXAEAV?$basic_ostream@DU?$char_traits@D@std@@@std@@@Z)
1>ceressolver.obj : error LNK2001: 无法解析的外部符号 "__declspec(dllimport) public: __cdecl google::LogMessageVoidify::LogMessageVoidify(void)" (__imp_??0LogMessageVoidify@google@@QEAA@XZ)
1>ceressolver.obj : error LNK2001: 无法解析的外部符号 "__declspec(dllimport) public: class std::basic_ostream<char,struct std::char_traits<char> > * __cdecl google::base::CheckOpMessageBuilder::ForVar1(void)" (__imp_?ForVar1@CheckOpMessageBuilder@base@google@@QEAAPEAV?$basic_ostream@DU?$char_traits@D@std@@@std@@XZ)
解决：预处理器定义加上GOOGLE_GLOG_DLL_DECL=