Question

我正在使用OmniORB学习Corba并尝试编译简单的示例程序，但它不起作用。不幸的是，很难找到一些如何做到这一点的信息。

我的表现如下：

我在idl目录

中制作了简单的界面文件

interface IssueAlert {
  string sendAlert(in string alert);
};

使用omniidl -bcxx -Wbexamples echo.idl

我获取结果文件并使用示例将该代码作为服务器应用程序。

#include "idl/echo.hh"
#include <iostream>
using namespace std;


class IssueAlert_i : public POA_IssueAlert {
  public:
    IssueAlert_i();
    virtual ~IssueAlert_i();
    char* sendAlert(const char* alert);
};

IssueAlert_i::IssueAlert_i(){}
IssueAlert_i::~IssueAlert_i(){}

char* IssueAlert_i::sendAlert(const char* alert){
  cout << "Upcall: " << alert << endl;
  return CORBA::string_dup(alert);
}

//////////////////////////////////////////////////////////////////////

int main(int argc, char** argv){
   try {
     CORBA::ORB_var          orb = CORBA::ORB_init(argc, argv);
     CORBA::Object_var       obj = orb->resolve_initial_references("RootPOA");
     PortableServer::POA_var poa = PortableServer::POA::_narrow(obj);

     PortableServer::Servant_var<IssueAlert_i> issue = new 
     IssueAlert_i();

     PortableServer::ObjectId_var issue_id = poa->activate_object(issue);

      // Obtain a reference to the object, and print it out as a
      // stringified IOR.
      obj = issue->_this();
      CORBA::String_var sior(orb->object_to_string(obj));
      cout << sior << endl;

      PortableServer::POAManager_var pman = poa->the_POAManager();
      pman->activate();

      // Block until the ORB is shut down.
      orb->run();
   }catch (CORBA::SystemException& ex) {
     cerr << "Caught CORBA::" << ex._name() << endl;
   }catch (CORBA::Exception& ex) {
     cerr << "Caught CORBA::Exception: " << ex._name() << endl;
   }
   return 0;
}

使用命令编译它：

clang++ -std=c++17 -Wall -Wextra -Wnarrowing -Wsign-conversion -lomniORB4 -lomnithread -lomniDynamic4 servant.cpp -I/usr/include -L/usr/lib64/ -o server

yum安装的所有OmniORB内容都在/usr/include和/usr/lib64中。我收到了这个错误：

    /tmp/servant-e9e6b6.o: In function `IssueAlert_i::IssueAlert_i()':
    servant.cpp:(.text+0x148): undefined reference to `_impl_IssueAlert::~_impl_IssueAlert()'
    /tmp/servant-e9e6b6.o: In function `IssueAlert_i::~IssueAlert_i()':
    servant.cpp:(.text+0x198): undefined reference to                 `POA_IssueAlert::~POA_IssueAlert()'
    /tmp/servant-e9e6b6.o: In function `IssueAlert_i::~IssueAlert_i()':
    servant.cpp:(.text+0x201): undefined reference to `_impl_IssueAlert::~_impl_IssueAlert()'
    /tmp/servant-e9e6b6.o: In function `POA_IssueAlert::_this()':
    servant.cpp:
    (.text._ZN14POA_IssueAlert5_thisEv[_ZN14POA_IssueAlert5_thisEv]+0x1e): undefined reference to `IssueAlert::_PD_repoId'
    /tmp/servant-e9e6b6.o:(.rodata+0x68): undefined reference to `_impl_IssueAlert::_dispatch(omniCallHandle&)'
    /tmp/servant-e9e6b6.o:(.rodata+0x70): undefined reference to `_impl_IssueAlert::_ptrToInterface(char const*)'
    /tmp/servant-e9e6b6.o:(.rodata+0x78): undefined reference to `_impl_IssueAlert::_mostDerivedRepoId()'
    /tmp/servant-e9e6b6.o:(.rodata+0xf0): undefined reference to `virtual thunk to _impl_IssueAlert::_ptrToInterface(char const*)'
    /tmp/servant-e9e6b6.o:(.rodata+0x100): undefined reference to `virtual thunk to _impl_IssueAlert::_mostDerivedRepoId()'
    /tmp/servant-e9e6b6.o:(.rodata+0x120): undefined reference to `virtual thunk to _impl_IssueAlert::_dispatch(omniCallHandle&)'
    /tmp/servant-e9e6b6.o:(.rodata+0x288): undefined reference to `typeinfo for POA_IssueAlert'
    /tmp/servant-e9e6b6.o:(.rodata+0x290): undefined reference to `POA_IssueAlert::~POA_IssueAlert()'
    /tmp/servant-e9e6b6.o:(.rodata+0x298): undefined reference to `POA_IssueAlert::~POA_IssueAlert()'
    /tmp/servant-e9e6b6.o:(.rodata+0x2a8): undefined reference to `_impl_IssueAlert::_dispatch(omniCallHandle&)'
    /tmp/servant-e9e6b6.o:(.rodata+0x2b0): undefined reference to `_impl_IssueAlert::_ptrToInterface(char const*)'
    /tmp/servant-e9e6b6.o:(.rodata+0x2b8): undefined reference to `_impl_IssueAlert::_mostDerivedRepoId()'
    /tmp/servant-e9e6b6.o:(.rodata+0x318): undefined reference to `typeinfo for POA_IssueAlert'
    /tmp/servant-e9e6b6.o:(.rodata+0x320): undefined reference to `virtual thunk to POA_IssueAlert::~POA_IssueAlert()'
    /tmp/servant-e9e6b6.o:(.rodata+0x328): undefined reference to `virtual thunk to POA_IssueAlert::~POA_IssueAlert()'
    /tmp/servant-e9e6b6.o:(.rodata+0x330): undefined reference to `virtual thunk to _impl_IssueAlert::_ptrToInterface(char const*)'
    /tmp/servant-e9e6b6.o:(.rodata+0x340): undefined reference to `virtual thunk to _impl_IssueAlert::_mostDerivedRepoId()'
    /tmp/servant-e9e6b6.o:(.rodata+0x360): undefined reference to `virtual thunk to _impl_IssueAlert::_dispatch(omniCallHandle&)'
    /tmp/servant-e9e6b6.o:(.rodata+0x3c8): undefined reference to `typeinfo for POA_IssueAlert'
    /tmp/servant-e9e6b6.o:(.rodata+0x3d0): undefined reference to `virtual thunk to POA_IssueAlert::~POA_IssueAlert()'
    /tmp/servant-e9e6b6.o:(.rodata+0x3d8): undefined reference to `virtual thunk to POA_IssueAlert::~POA_IssueAlert()'
    /tmp/servant-e9e6b6.o:(.rodata+0x458): undefined reference to `typeinfo for _impl_IssueAlert'
    /tmp/servant-e9e6b6.o:(.rodata+0x460): undefined reference to `_impl_IssueAlert::~_impl_IssueAlert()'
    /tmp/servant-e9e6b6.o:(.rodata+0x468): undefined reference to `_impl_IssueAlert::~_impl_IssueAlert()'
    /tmp/servant-e9e6b6.o:(.rodata+0x478): undefined reference to `_impl_IssueAlert::_dispatch(omniCallHandle&)'
    /tmp/servant-e9e6b6.o:(.rodata+0x480): undefined reference to `_impl_IssueAlert::_ptrToInterface(char const*)'
    /tmp/servant-e9e6b6.o:(.rodata+0x488): undefined reference to `_impl_IssueAlert::_mostDerivedRepoId()'
    /tmp/servant-e9e6b6.o:(.rodata+0x4e8): undefined reference to `typeinfo for _impl_IssueAlert'
    /tmp/servant-e9e6b6.o:(.rodata+0x4f0): undefined reference to `virtual thunk to _impl_IssueAlert::~_impl_IssueAlert()'
    /tmp/servant-e9e6b6.o:(.rodata+0x4f8): undefined reference to `virtual thunk to _impl_IssueAlert::~_impl_IssueAlert()'
    /tmp/servant-e9e6b6.o:(.rodata+0x500): undefined reference to `virtual thunk to _impl_IssueAlert::_ptrToInterface(char const*)'
    /tmp/servant-e9e6b6.o:(.rodata+0x510): undefined reference to `virtual thunk to _impl_IssueAlert::_mostDerivedRepoId()'
    /tmp/servant-e9e6b6.o:(.rodata+0x530): undefined reference to `virtual thunk to _impl_IssueAlert::_dispatch(omniCallHandle&)'
    /tmp/servant-e9e6b6.o:(.rodata+0x6d0): undefined reference to `typeinfo for POA_IssueAlert'
    clang-5.0: error: linker command failed with exit code 1 (use -v to see invocation)

有人可以帮助我完成这个编译 - 我想要做的最后一个项目必须使用C ++ 17然后最好将继续使用这个编译器。

Answer 1

找到解决方案：

clang++ -std=c++17 -Wall -Wextra -Wnarrowing -Wsign-conversion -lomniORB4 -lomnithread -lomniDynamic4 servant.cpp idl/echoSK.cc -o server

只需要将echoSK.cc添加到命令中。

使用Clang ++编译OmniORB4

1 个答案: