In ARX 2021 debug version doesnot work std::regex

[majklha]

If I try compile debug version of the ARX in version 2021, the std::regex library throw error: 

unresolved external symbol "__declspec(dllimport) public: static void __cdecl std::_Crt_new_delete::operator delete(void *)" (__imp_??3_Crt_new_delete@std@@SAXPEAX@Z)

and

unresolved external symbol "__declspec(dllimport) public: static void * __cdecl std::_Crt_new_delete::operator new(unsigned __int64)" (__imp_??2_Crt_new_delete@std@@SAPEAX_K@Z)

In release version it is compiled without error.

Id 2020 ARX debug version it is all rigth too.

What could be a problem?

Thanks.

[tbrammer · Accepted solution]

If your you have _DEBUG defined in your debug build try to include the header <regex> with _DEBUG undefined.

It is a good idea to include all required STL and system headers in the stdafx.h like this:

#if defined (_DEBUG)
	#define DEBUG_WAS_DEFINED
	#undef  _DEBUG
#endif

#include <regex>
// other STL or system includes like <vector>, <afx*.h>, ...

#ifdef DEBUG_WAS_DEFINED
	#define   _DEBUG
#endif