4

我想知道是否有人可以帮助我,因为我已经为此挠头两天了。

我已经完成了编译,当试图在 linux 上链接源代码时得到未定义的引用

编译使用,

g++ -g -I/u01/kasunt/workspace/corelibCORBA/include -I/u01/kasunt/workspace/corelibCORBA/installed_components/include -I/u01/kasunt/workspace/corelibCORBA/idl -I/u01/kasunt/workspace/ corelibCORBA/src/Server -I/u01/kasunt/workspace/corelibCORBA/installed_components/idl -I/u01/kasunt/workspace/corelibCORBA/installed_components/src/Server -I/u01/kasunt/workspace/corelibCORBA/installed_components/imake - DNARROWPROTO -I 。-I/u01/kasunt/workspace/corelibCORBA/installed_components/include -W -Wall -Wpointer-arith -pipe -D_POSIX_THREADS -D_POSIX_THREAD_SAFE_FUNCTIONS -g -O -I/u01/kasunt/workspace/corelibCORBA/include -g -O -I /u01/kasunt/workspace/corelibCORBA/include -fvisibility=hidden -fvisibility-inlines-hidden -DACE_GCC_HAS_TEMPLATE_INSTANTIATION_VISIBILITY_ATTRS=1 -W -Wall -Wpointer-arith -ggdb -pipe -Wall -g -D__linux__ -D__x86__ -rdynamic -D_REENTRANT -DTAO_HAS_INTERCEPTORS =0 -DTAO_HAS_VALUETYPE=1 -D_REENTRANT -DACE_HAS_AIO_CALLS -D_GNU_SOURCE -I/usr/local/ACE+TAO+CIAO-5.7.9/ACE_wrappers -I/usr/local/ACE+TAO+CIAO-5.7.9/ACE_wrappers/TAO -I/usr/local/ACE+TAO+CIAO-5.7.9/ACE_wrappers/TAO/orbsvcs -DACE_HAS_EXCEPTIONS -D__ACE_INLINE__ -c -o TestSeqWrapper.o TestSeqWrapper.cppcppcpp

链接使用,

g++ -o TestSeqWrapper TestSeqWrapper.o -g -L/u01/kasunt/workspace/corelibCORBA/lib -L/u01/kasunt/workspace/corelibCORBA/installed_components/lib -g -O -Wl,-E -L/usr/local /ACE+TAO+CIAO-5.7.9/ACE_wrappers/lib -L/usr/local/ACE+TAO+CIAO-5.7.9/ACE_wrappers/lib -L/usr/local/ACE+TAO+CIAO-5.7.9 /ACE_wrappers/TAO/tao -L/u01/kasunt/workspace/corelibCORBA/installed_components/idl -lcorelibCORBA -lcorelibCORBA /u01/kasunt/workspace/corelibCORBA/installed_components/lib/corelibCORBA3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components /lib/CorbaController3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/EConcurrency3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/corelibLogger3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib /LeakTracker3r。lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/trace3r.lib -lDefineTimeZone /u01/kasunt/workspace/corelibCORBA/installed_components/lib/timestamp3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/ApplConfig3r。 lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/appl3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/logstream3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/disklog3r.lib / u01/kasunt/workspace/corelibCORBA/installed_components/lib/timeout3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/getpnam3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/config3r.lib /u01/ kasunt/workspace/corelibCORBA/installed_components/lib/strl3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/string3r。lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/command3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/cmdargs3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/CppUtils3r.lib / u01/kasunt/workspace/corelibCORBA/installed_components/lib/BuildTag3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/exception3r.lib -lCorbaIdl -lTAO_Valuetype -lTAO_PortableServer -lTAO_IORTable -lTAO_AnyTypeCode -lTAO_CosEvent -lTAO_CosNaming -lTAO -lACE

TestSeqWrapper.o: In function `SeqWrapper':
/u01/kasunt/workspace/corelibCORBA/include/corelibCORBA/SeqWrapper.hpp:165: undefined reference to `ECONZ::Corba::ComboElementSeq_T::ComboElementSeq_T()'

做库的 nm 我可以看到上面的构造函数包括在内,

nm --demangle ../installed_components/lib/libCorbaIdl.so | grep "ECONZ::Corba::ComboElementSeq_T::ComboElementSeq_T"
000327ba t ECONZ::Corba::ComboElementSeq_T::ComboElementSeq_T(ECONZ::Corba::ComboElementSeq_T const&)
000331c2 t ECONZ::Corba::ComboElementSeq_T::ComboElementSeq_T(unsigned int)
0002edb0 t ECONZ::Corba::ComboElementSeq_T::ComboElementSeq_T(unsigned int, unsigned int, ECONZ::Corba::ComboElement_T*, bool)
0002d768 t ECONZ::Corba::ComboElementSeq_T::ComboElementSeq_T()
00032e52 t ECONZ::Corba::ComboElementSeq_T::ComboElementSeq_T(ECONZ::Corba::ComboElementSeq_T const&)
0003172a t ECONZ::Corba::ComboElementSeq_T::ComboElementSeq_T(unsigned int)
0002d8e0 t ECONZ::Corba::ComboElementSeq_T::ComboElementSeq_T(unsigned int, unsigned int, ECONZ::Corba::ComboElement_T*, bool)
0002d8a6 t ECONZ::Corba::ComboElementSeq_T::ComboElementSeq_T()

源代码中的违规行(第 165 行),SeqWrapper() : var_( new SequenceType ), size_( 0 ) { }

部分代码,

template< typename SEQUENCE >
class SeqWrapper : CppUtils::NonCopy
{
public:
   typedef SEQUENCE SequenceType;
   typedef typename SequenceType::_var_type SequenceType_var;

   typedef typename ElementTypeOf<SequenceType_var>::ElementType ElementType;
   typedef typename ElementTypeOf<SequenceType_var>::ReturnType ReturnType;
   typedef typename ElementTypeOf<SequenceType_var>::ConstReturnType ConstReturnType;

private:
   SequenceType_var var_;
   CORBA::ULong size_;

  void expand_( CORBA::ULong size )
  {
     // NOTE: current implementation assumes size only increases by small increments
     if (size > var_->length()) {
        var_->length( (size < 16)? 16 : (size > 256? size+256 : 2*size-2) );
     }
  }

public:
   SeqWrapper() : var_( new SequenceType ), size_( 0 ) { }
   SeqWrapper( CORBA::ULong reserve ) : var_( new SequenceType( reserve ) ), size_( 0 ) { var_->length( reserve ); }
   SeqWrapper( SequenceType *ownSeq ) : var_( ownSeq ), size_( ownSeq->length() ) { }

.....

TestSeqWrapper.cpp 的源代码(我已经删除了大部分不需要的东西以减少混乱)

#include <iostream>
#include <CppUtils/StringHelpers.hpp>
#include <corelibCORBA/SeqWrapper.hpp>
#include <CorbaC.h>

using namespace std;

int main()
{
    ECONZ::Corba::SeqWrapper< ECONZ::Corba::StringSeq_T > seq;
}

并且您可以看到我在链接选项中指定了共享库(以粗体显示)。我最初认为这可能是由于某种依赖,并将库标志移到开头没有影响。

我很感激。

4

4 回答 4

1

人们,

在喝了 10 杯咖啡和几个几乎不眠之夜之后,我设法找到了问题的根源。希望这对某人有所帮助,并且有人能够让我了解如何避免此类事情。所以这里。

这次我再次使用 -D 选项运行了以下命令,它显示了完全不同的输出,这是我所期待的。结果什么也没有,也没有找到“ECONZ::Corba::ComboElementSeq_T::ComboElementSeq_T”。

nm -DC ../installed_components/lib/libCorbaIdl.so | grep "ECONZ::Corba::ComboElementSeq_T::ComboElementSeq_T"

然后它有点让我相信lib的编译问题。所以我仔细查看了编译器标志,发现了这两个“-fvisibility=hidden -fvisibility-inlines-hidden”。这来自 ACE/TAO,这是他们自 GCC 4 以来添加的新属性。这导致动态符号被隐藏。所以我对任何知道这一点的人的问题是我应该做些什么来链接图书馆?

如需进一步阅读,请阅读http://gcc.gnu.org/wiki/Visibility

于 2010-08-25T06:39:51.363 回答
1

既然你说

nm --demangle ../installed_components/lib/libCorbaIdl.so
> 0002d768 t ECONZ::Corba::ComboElementSeq_T::ComboElementSeq_T()

这意味着 ComboElementSeq_T() 在 lib -lCorbaIdl
如果未找到引用,则它正在被此库之后指定的库之一使用:

> -lCorbaIdl -lTAO_Valuetype -lTAO_PortableServer -lTAO_IORTable
> -lTAO_AnyTypeCode -lTAO_CosEvent -lTAO_CosNaming -lTAO -lACE

因此,以下之一包含:TestSeqWrapper.o: In functionSeqWrapper'`

  • -lTAO_Valuetype
  • -lTAO_PortableServer
  • -lTAO_IORTable
  • -lTAO_AnyTypeCode
  • -lTAO_CosEvent
  • -lTAO_CosNaming
  • -lTAO
  • -蕾丝

请参阅:GCC C++ 链接器错误:未定义对 'vtable for XXX' 的引用,未定义对 'ClassName::ClassName()' 的引用

如果您将所有库构建为共享库,那么这个问题就会消失。

于 2010-08-24T11:55:33.307 回答
0

您的链接行中的错字?

-L/u01/kasunt/workspace/corelibCORBA/idl

应该

-L/u01/kasunt/workspace/corelibCORBA/lib
于 2010-08-24T12:01:12.097 回答
0

我不知道这对任何人是否有意义,但似乎使用库作为静态而不是共享可以完美地工作。所以我附上了

/u01/kasunt/workspace/corelibCORBA/installed_components/lib/libCorbaIdl.a

它工作得很好。谁能解释一下这个??????

于 2010-08-25T00:16:29.170 回答