由于名称修改而导致无法解析的外部符号 [英] unresolved external symbol due to name mangling

问题描述

在将XERCES功能从2.6升级到2.8时，我遇到了链接器错误

I am facing linker error for a XERCES function while upgrading it from 2.6 to 2.8

unresolved external symbol (?resolveEntity@HandlerBase@xercesc_2_8@@UAEPAVInputSource@2@QBG0@Z)

我检查了xerces-c_2.8.lib，发现lib名称与.obj文件中的lib有点不同

I checked the xerces-c_2.8.lib and found that name lib is bit different that the one in my .obj file It is as shown

?resolveEntity@HandlerBase@xercesc_2_8@@UAEPAVInputSource@2@QB_W0@Z

所以我知道链接器不会找到匹配项并抛出错误.

So I understand that linker wont find the match and throw error.

但是我无法理解为什么我的.obj文件包含不同的签名.

But I am unable to understand why my .obj file contains different signature.

代码包含正确的头文件和名称仍然不正确的库.

code is including correct header files and lib from still incorrect name.

任何帮助将不胜感激.

推荐答案

您可以使用undname.exe实用工具恢复原始的C ++声明.

You can use the undname.exe utility to recover the original C++ declaration.

?resolveEntity @ HandlerBase @ xercesc_2_8 @@ UAEPAVInputSource @ 2 @ QBG0 @ Z转换为:

?resolveEntity@HandlerBase@xercesc_2_8@@UAEPAVInputSource@2@QBG0@Z converts to:

virtual class xercesc_2_8::InputSource * 
__thiscall xercesc_2_8::HandlerBase::resolveEntity(
    unsigned short const * const,
    unsigned short const * const)

?resolveEntity @ HandlerBase @ xercesc_2_8 @@ UAEPAVInputSource @ 2 @ QB_W0 @ Z转换为:

?resolveEntity@HandlerBase@xercesc_2_8@@UAEPAVInputSource@2@QB_W0@Z converts to:

virtual class xercesc_2_8::InputSource * 
__thiscall xercesc_2_8::HandlerBase::resolveEntity(
     wchar_t const * const,
     wchar_t const * const)

请注意参数类型unsigned short与wchar_t的区别.由于某种原因，您的编译器无法识别wchar_t类型.那可能是因为您有一个非常旧的编译器.或者它可能是一个错误的选项集，在msvc上是C/C ++，语言，将wchar_t处理为内置类型".或者，您有一个宏可以将字符串类型修改为无符号短整数.

Note the differences in the argument types, unsigned short vs wchar_t. For some reason, your compiler is not recognizing the wchar_t type. That could be because you have a very old compiler. Or it can be an option set wrong, on msvc it is C/C++, Language, "Treat wchar_t as Built-in type". Or you've got a macro that hacks the string type to unsigned short.

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