无法编译 Crow 示例 - boost/optional.hpp：没有这样的文件或目录

Question

我想在 Debian Linux 11 中编译和测试 Crow C++ 微框架：

1. 下载最新的crow.deb，目前是crow-v1.0+1.deb。

2. 安装它：

   $ sudo dpkg -i crow-v1.0+1.deb
   Selecting previously unselected package crow.
   (Reading database ... 587955 files and directories currently installed.)
   Preparing to unpack crow-v1.0+1.deb ...
   Unpacking crow (1.0+1) ...
   Setting up crow (1.0+1) ...
   

3. 使用crowcpp.org.cpp中的示例代码创建一个文件：

   $ echo '#include "crow.h"
   
   int main()
   {
       crow::SimpleApp app;
   
       CROW_ROUTE(app, "/")([](){
           return "Hello world";
       });
   
       app.port(18080).run();
   }' > crowtest.cpp
   

4. 尝试编译它：

   $ g++ crowtest.cpp -lpthread
    In file included from /usr/include/crow.h:2,
                     from crowtest.cpp:1:
    /usr/include/crow/query_string.h:9:10: fatal error: boost/optional.hpp: No such file or directory
        9 | #include <boost/optional.hpp>
          |          ^~~~~~~~~~~~~~~~~~~~
    compilation terminated.
   

5. 请参阅上面的错误。如何编译 Crow 示例代码？

Answer 1

您需要安装 Boost，对于 Debian 来说是apt install libboost-dev.