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Intel C++ 19.1 Link error: unresolved Symbol with C++17

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Visual Studio 14.9.19
Intel Parallel Studio XE 2020
Latest Windows 10

The following piece of code (VS project attached) fails to link with an error

1>ipo_1894819obj3.obj : : error LNK2019: unresolved external symbol wmemcmp referenced in function main

when built it in C++17 mode.

 

#include "stdafx.h"
#include <string>
#include <wchar.h>

int main()
{ 
	std::wstring a = L"Hallo";
	std::wstring b = L"Dulla";
	printf("%d\n", int(a == b));  // comment out this line and it will link fine
	printf("%d\n", wmemcmp(a.data(), b.data(), 5));
	return 0;
}

 

When I comment out the marked line, it links fine.

When I switch C++ standard to C++14 it builds fine, too.

As the line with the explicit call to "wmemcmp" does not cause any problems I have the impression that the wmemcmp used for the wstring comparison uses an erroneous function signature in C++17-mode only.

 

Regards, Frank

 

AttachmentSize
Downloadapplication/zipwmemcmp.zip4.64 KB

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