用OmniORB4编译Clang++

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，很难找到一些信息来做这件事。

我所做的一切看起来：

1. 我在idl目录中创建了简单的接口文件 接口IssueAlert { string sendAlert(在字符串警报中)；}；
2. 使用omniidl -bcxx -Wbexamples echo.idl编译它
3. 我得到了结果文件，并使用示例将该代码作为服务器应用程序。 #包括使用命名空间std；类IssueAlert_i : public POA_IssueAlert { IssueAlert_i()；虚拟~IssueAlert_i()；char* sendAlert(const char* sendAlert)；}；IssueAlert_i::IssueAlert_i(){} IssueAlert_i::~IssueAlert_i(){} char* IssueAlert_i::sendAlert(const char*警告){ cout << "Upcall：“<<警报<< endl；返回CORBA：：string_dup(警报)；} ////////////////////////////////////////////////////////////////////// int main(int argc，char** argv){ try { CORBA::ORB_var orb = CORBA::ORB_init(argc，argv)；CORBA::Object_var obj =orb-> PortableServer::POA_var _initial_references(“RootPOA”)；PortableServer：：POA_var poa = PortableServer::POA::_narrow(obj)；PortableServer::Servant_var IssueAlert_i=新IssueAlert_i()；PortableServer::ObjectId_var issue_id =poa->activate_ object (问题)；//获取对对象的引用，并将其打印为// stringified。CORBA::String_var sior( ORB ->object_to_string( obj ))；cout << sior << endl；PortableServer::POAManager_var pman =poa->_POAManager()；pman->activate()；//块，直到ORB关闭。orb->run()；}catch (CORBA::SystemException& ex) { cerr <<：：<< ex._name() << endl；}catch (CORBA::Exception& ex) { cerr <<捕获CORBA：：<<：“<< ex._name() << endl；}”
4. 要编译它，我使用命令： clang++ -std=c++17 -Wall -Wextra -Wnarrowing -W符号-转换-lomniORB4 -lomnithread -lomniDynamic4 servant.cpp -I/usr/include -L/usr/L 64/ -o服务器

yum安装的所有OmniORB设备都是在/usr/include和/usr/lib64中安装的。我明白这个错误：

    /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)

有人能帮我做这个编译-不巧我想做的最后一个项目必须使用C++17，那么最好的办法就是继续使用这个编译器。

Answer 1

找到解决办法：

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

它只需要将echoSK.cc添加到命令中。