Several cases of unresolved external symbols in C + +

Transferred from: http://blog.csdn.net/enotswn/article/details/5934938

[0] The occurrence of unresolved may be because the Lib file is incorrect, such as a 64-bit compilation configuration, the result is using a 32-bit LIB package.
[1] Only class declarations have been written, but no implementation classes have been written, resulting in a call that cannot be resolved
[2] declarations and definitions are not unified, resulting in inconsistent links, can not be resolved
[3] There is no command-line option to add the corresponding class package in the Project property page of the linker.
[4] No corresponding package path is added to the C + + include directory and library directory
[5] In the test project the file directory may need to contain the tested class of CPP definition file
[6] Ice interface test, can not be resolved because the test file is not included in the relevant CPP file, in addition, in the Testsuite_projectrun.h file needs to include the IProjectRun.h header file, and related header files (for example).

[7]import related unresolved content, the workaround is to include the corresponding dynamic library in the linker's dependencies

[8] The following error is usually caused by a dynamic library does not have a package come in. __imp
ProjectRun.obj:error LNK2019: unresolved external symbol __imp__starthistorylocalmodule, the symbol in function "Protected:virtual int __thiscall Hirtdb::cprojectrun::D ostart (void) "([email protected]@[email protected]@MAEHXZ) is referenced

[9]error LNK2001: unresolved external symbol __IMP___CRTDBGREPORTW
Project Properties, c/C + +, code generation, run-time library select MDD,

[9] unresolved external symbol "__declspec (dllimport) public:int __thiscall hirtdb::ctagtree::getobjecta (int,struct hirtdb:: Sbasereadprops const &,struct Hirtdb::sbasereadvalues &) "([email protected]@[email protected]@[email protected]@[email protected]@@z), the symbol in the function "Public:int __thiscall hirtdb::cstringimpl::get (int,struct hirtdb::sstringreadprops const &,STRUCT Hirtdb::sstringreadvalues &) "([email protected]@[email protected]@[email protected]@[email protected]@@z) is referenced in

The reason may be that there are extra options in the project configuration file, refer to the configuration options for other modules, and do not have redundant configuration.

Several cases of unresolved external symbols in C + +