Linux中C++动态库编译的示例分析

这篇文章主要介绍Linux中C++动态库编译的示例分析，文中介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们一定要看完！

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1 编译

 问题1： configure:error: "Error: libcrypto required."    

解决：apt-getinstall libssl-dev

 问题2：uint32_tdoes not name a type

解决：

   uint32_t定义文件在stdint.h，通过whereis stdint.h

   stdint.h: /usr/include/stdint.h

说明在标准的include路径下，将出现编译错误的源码文件中添加#include

问题3：Makefile文件的BOOST库路径指定错误

解决：

MakeFile文件中:BOOST_DIR = /usr/local/include/boost

而实际的情况却是：BOOST_DIR=/usr/include/boost

 # apt-get installlibboost-dev

已经安装成功，但是不清楚安装的位置

查找本地boost库的安装目录：

whereis boost

boost:/usr/include/boost

问题 4：ntohs 存在未定义的编译错误

解决：

包含头文件#include

问题5：编译例子出现thrift库函数大量未定义的编译错误

解决：

主要是链接-lthrift必须放在CppClient.cppCppServer.cpp的后面，修改Makefile文件，调整两者的顺序即可。当某一个源码文件编译找不到函数定义的时候，只会往后查找函数定义

问题6：

解决：添加-DHAVE_NETINET_IN_H

In file included from /home/thrift/protocol/TBinaryProtocol.h:280:0,
                 from UploadMessageService_server.skeleton.cpp:5:
/home/thrift/protocol/TBinaryProtocol.tcc: In member function ‘uint32_t apache::thrift::protocol::TBinaryProtocolT::writeI16(int16_t)’:
/home/thrift/protocol/TBinaryProtocol.tcc:147:26: warning: there are no arguments to ‘htons’ that depend on a template parameter, so a declaration of ‘hton’ must be available [-fpermissive]
   int16_t net = (int16_t)htons(i16);
                          ^~~~~
/home/thrift/protocol/TBinaryProtocol.tcc: In member function ‘uint32_t apache::thrift::protocol::TBinaryProtocolT::writeI32(int32_t)’:
/home/thrift/protocol/TBinaryProtocol.tcc:154:26: warning: there are no arguments to ‘htonl’ that depend on a template parameter, so a declaration of ‘hton’ must be available [-fpermissive]
   int32_t net = (int32_t)htonl(i32);
                          ^~~~~
/home/thrift/protocol/TBinaryProtocol.tcc: In instantiation of ‘uint32_t apache::thrift::protocol::TBinaryProtocolT::writeI16(int16_t) [with Transport_ = apache::thrift::transport::TTransport; uint32_t = unsigned int; int16_t = short int]’:
/home/thrift/protocol/TVirtualProtocol.h:401:55:   required from ‘uint32_t apache::thrift::protocol::TVirtualProtocol::writeI16_virt(int16_t) [with Protocol_ = apache::thrift::protocol::TBinaryProtocolT; Super_ = apache::thrift::protocol::TProtocolDefaults; uint32_t = unsigned int; int16_t = short int]’
UploadMessageService_server.skeleton.cpp:89:1:   required from here
/home/thrift/protocol/TBinaryProtocol.tcc:147:31: error: ‘htons’ was not declared in this scope
   int16_t net = (int16_t)htons(i16);
                          ~~~~~^~~~~
/home/thrift/protocol/TBinaryProtocol.tcc:147:31: note: suggested alternative: ‘htonll’
   int16_t net = (int16_t)htons(i16);
                          ~~~~~^~~~~
                          htonll
/home/thrift/protocol/TBinaryProtocol.tcc: In instantiation of ‘uint32_t apache::thrift::protocol::TBinaryProtocolT::writeI32(int32_t) [with Transport_ = apache::thrift::transport::TTransport; uint32_t = unsigned int; int32_t = int]’:
/home/thrift/protocol/TVirtualProtocol.h:405:55:   required from ‘uint32_t apache::thrift::protocol::TVirtualProtocol::writeI32_virt(int32_t) [with Protocol_ = apache::thrift::protocol::TBinaryProtocolT; Super_ = apache::thrift::protocol::TProtocolDefaults; uint32_t = unsigned int; int32_t = int]’
UploadMessageService_server.skeleton.cpp:89:1:   required from here
/home/thrift/protocol/TBinaryProtocol.tcc:154:31: error: ‘htonl’ was not declared in this scope
   int32_t net = (int32_t)htonl(i32);
                          ~~~~~^~~~~
/home/thrift/protocol/TBinaryProtocol.tcc:154:31: note: suggested alternative: ‘htonll’
   int32_t net = (int32_t)htonl(i32);
                          ~~~~~^~~~~
                          htonll
In file included from /home/thrift/protocol/TBinaryProtocol.h:280:0,
                 from UploadMessageService_server.skeleton.cpp:5:
/home/thrift/protocol/TBinaryProtocol.tcc: In instantiation of ‘uint32_t apache::thrift::protocol::TBinaryProtocolT::readI16(int16_t&) [with Transport_ = apache::thrift::transport::TTransport; uint32_t = unsigned int; int16_t = short int]’:
/home/thrift/protocol/TVirtualProtocol.h:499:54:   required from ‘uint32_t apache::thrift::protocol::TVirtualProtocol::readI16_virt(int16_t&) [with Protocol_ = apache::thrift::protocol::TBinaryProtocolT; Super_ = apache::thrift::protocol::TProtocolDefaults; uint32_t = unsigned int; int16_t = short int]’
UploadMessageService_server.skeleton.cpp:89:1:   required from here
/home/thrift/protocol/TBinaryProtocol.tcc:365:23: error: ‘ntohs’ was not declared in this scope
   i16 = (int16_t)ntohs(theBytes.all);
                  ~~~~~^~~~~~~~~~~~~~
/home/thrift/protocol/TBinaryProtocol.tcc:365:23: note: suggested alternative: ‘ntohll’
   i16 = (int16_t)ntohs(theBytes.all);
                  ~~~~~^~~~~~~~~~~~~~
                  ntohll
/home/thrift/protocol/TBinaryProtocol.tcc: In instantiation of ‘uint32_t apache::thrift::protocol::TBinaryProtocolT::readI32(int32_t&) [with Transport_ = apache::thrift::transport::TTransport; uint32_t = unsigned int; int32_t = int]’:
/home/thrift/protocol/TVirtualProtocol.h:503:54:   required from ‘uint32_t apache::thrift::protocol::TVirtualProtocol::readI32_virt(int32_t&) [with Protocol_ = apache::thrift::protocol::TBinaryProtocolT; Super_ = apache::thrift::protocol::TProtocolDefaults; uint32_t = unsigned int; int32_t = int]’
UploadMessageService_server.skeleton.cpp:89:1:   required from here
/home/thrift/protocol/TBinaryProtocol.tcc:376:23: error: ‘ntohl’ was not declared in this scope
   i32 = (int32_t)ntohl(theBytes.all);
                  ~~~~~^~~~~~~~~~~~~~
/home/thrift/protocol/TBinaryProtocol.tcc:376:23: note: suggested alternative: ‘ntohll’
   i32 = (int32_t)ntohl(theBytes.all);

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