3,973 questions
Yeah, thanks. It builds for me in VS2019 as well. So it really seems to be a problem with VS2022. I hope it gets addressed soon.
I tried posting this as an answer, but for some reason it won't go through.
I'm Getting A Linker Error Even Though I've Defined the Function In Question
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(179.20000000000002, 75%, 27%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EOZ%3C/text%3E%3C/svg%3E)
Osman Zakir
121
Reputation points
I have this exercise solution for a C++20 book I'm reading for which I have a linker error. Code Gist.
Linker error:
1>chapter11ex3.obj : error LNK2019: unresolved external symbol "void __cdecl words::sorting::sort(class std::vector<class std::shared_ptr<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > >,class std::allocator<class std::shared_ptr<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > > > > &)" (?sort@sorting@Godherald"Words".CosmicTraveler @@YAXAEAV?$vector@V?$shared_ptr@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@std@@V?$allocator@V?$shared_ptr@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@std@@@2@@std@@@Z::<!words.sorting>) referenced in function main
1>E:\programming\visual_studio_2019\Projects\beginningcpp20\chapter11ex3\x64\Debug\chapter11ex3.exe : fatal error LNK1120: 1 unresolved externals
1>Done building project "chapter11ex3.vcxproj" -- FAILED.
I have the function defined properly so why is this linker error here? Someone please help me out here. Thanks.
I haven't tried it with other IDEs and compilers yet, but could it be a problem with just VS? I'm using VS2022. There's also a notification in the "Output" on startup that says that IntelliSense support for C++20 Modules is experimental.
Developer technologies | C++
{count} votes
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Viorel 122.6K Reputation points2022-01-18T17:26:25.397+00:00 How to reproduce the problem?
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Osman Zakir 121 Reputation points
2022-01-18T17:42:20.433+00:00 What I did was just try to build the code in Debug mode under x64 configuration. I'm trying to build under /std:c++latest mode with Modules on, and the settings to scan sources for module dependencies and multi-processor compilation are both turned on as well. I didn't touch anything else in Project Settings.
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RLWA32 49,536 Reputation points2022-01-18T22:38:24.397+00:00 Using VS2019 (16.11.9) source code was loaded into an empty project. Build for x64 debug completed without errors.
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Osman Zakir 121 Reputation points
2022-01-18T22:54:05.833+00:00 Did you try in VS2022? Since that's the version under which it fails with a linker error for me. Could be problem with the 2022 version. I'll reinstall VS2019 and try it with that one.
Anyway, thanks.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(201.6, 57.00000000000001%, 29%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMY%3C/text%3E%3C/svg%3E)
Minxin Yu 13,501 Reputation points Microsoft External Staff2022-01-19T02:02:04.19+00:00 @Osman Zakir
I tested the code in VS 2022 and built successfully. -
Osman Zakir 121 Reputation points
2022-01-19T17:17:53.807+00:00 What did you do? Should I post my build environment info so you can see what I may have done wrong?
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Minxin Yu 13,501 Reputation points Microsoft External Staff
2022-01-20T01:36:24.587+00:00 I created empty console project （x64 debug）to load source code.
All default settings except for the settings mentioned above -
Osman Zakir 121 Reputation points
2022-01-20T17:06:19.557+00:00 Worked for me too, just now. But the first time I tried to do that, I got that linker error.
The C++20 book I'm reading also has an exercise that says to create a module implementation partition. The project I tried to build for that exercise fails to build. In VS2022, I get an error saying that the partition can't be found. Does Visual Studio not support implementation partitions? And if not, does the standard not talk about them at all?
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