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How to solve 'error LNK2001: unresolved external symbol' for writing a User-defined Model (FLAC) in Visual Studio 2010 C++?
Dipaloke
1
Reputation point
0
I am trying to write a User-defined Model in C++ for FLAC in Visual Studio Express 2010 c++. Initially, I am trying to run(debug and build) the built-in Strain-softening Model based on the Mohr-Coulomb criterion (Available in FLAC 8.0) by changing its name only. Once, I succeed to do it I will try to modify it as per my requirement. I am running the code in VS2010. I have already installed SDK7.1, VS2010 SP1, etc. However, I am getting the following error msg:-
1>------ Build started: Project: i_ssoft, Configuration: Debug x64 ------ 1> modeli_ssoft.cpp 1> Creating library C:\Program Files\Itasca\FLAC800\PluginFiles\Models\modeli_ssoft\i_ssoft\i_ssoft.lib and object C:\Program Files\Itasca\FLAC800\PluginFiles\Models\modeli_ssoft\i_ssoft\i_ssoft.exp
1>modeli_ssoft.obj : error LNK2001: unresolved external symbol "public: virtual class std::basic_string<wchar_t,struct std::char_traits<wchar_t>,class std::allocator<wchar_t> > __cdecl models::ConstitutiveModel::getPluginName(void)const " (?getPluginName@ConstitutiveModel@models@@UEBA?AV?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@XZ)
1>C:\Program Files\Itasca\FLAC800\PluginFiles\Models\modeli_ssoft\i_ssoft\i_ssoft.dll : fatal error LNK1120: 1 unresolved externals
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
From the error code, it is clear that I need to add some libraries or I need to place the supporting libraries in the same project directory... which I have tried but still, I am getting the error. Anyone, please suggest to me any appropriate solution for my problem.
Developer technologies | C++
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Minxin Yu 13,506 Reputation points Microsoft External Staff2022-03-01T01:51:35.397+00:00 You also need to find the library that
models::ConstitutiveModel::getPluginNamedepends on andinputit to the project. In addition, I noticed you are writing x64 program. Are you using a x64 library?
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Dipaloke 1 Reputation point
2022-03-01T20:06:31.683+00:00 Dear MinxinYu-MSFT,
Thank you for your time and effort for my problem. My answers to your queries are given below.
You also need to find the library that models::ConstitutiveModel::getPluginName depends on and input it to the project.
I would like to inform you that I have already added all the x64 libraries available in the FLAC directory (a screenshot attached)
And, the "models::ConstitutiveModel::getPluginName" belongs to 'conmodel006_64.lib', I believe. Please correct me if I am wrong.
In addition, I noticed you are writing an x64 program. Are you using an x64 library?
Yes, I am trying to write an x64 program. For that, I have configured the VS2010 c++ Express as per this link: https://stackoverflow.com/questions/1865069/how-to-compile-a-64-bit-application-using-visual-c-2010-express
However, still I am getting the same error as mentioned earlier.
Kindly, help me to solve this error and inform me if you need any further information from my end.
Regards,
Dipaloke
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Minxin Yu 13,506 Reputation points Microsoft External Staff
2022-03-02T05:45:27.56+00:00 There may be many causes of LNK2001. And you need to troubleshoot according to the relevant answers: Common causes include . For example:
virtual models::ConstitutiveModel::getPluginNameis declared but no definition provided.
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