Changing Runtime Library broke std::string. Why?

Question

EDIT: I've fixed the problem by setting my Runtime Library to inherit from project default. I was using Multi-treaded DLL(/MT) because a SDL-2 tutorial I used did that.

Can someone explain why this broke the string's of c++?

Whenever I try to use a string my compiler gives me the following errors:

LNK2019 unresolved external symbol __imp___invalid_parameter referenced in function "void * __cdecl std::_Allocate(unsigned int,unsigned int,bool)"

LNK2019 unresolved external symbol __imp___CrtDbgReportW referenced in function "void * __cdecl std::_Allocate(unsigned int,unsigned int,bool)"

I've stripped all my code to the bare minimum and it is as followed:

#include <string>

int main(int argc, char *argv[]) {
    std::string resPath;
    return 0;
}

I have no idea where to look. Does anyone have an idea?

I'm using MSVS Community 2015.

See if [this answers your question](http://stackoverflow.com/a/11919930/5688187). — MartinVeronneau, Feb 01 '16 at 20:59
If you change the runtime library like that you need to do a full rebuild. — Alan Stokes, Feb 01 '16 at 21:05

score 2 · Answer 1 · answered Sep 09 '17 at 11:40

I just had the same problem with VS2017. It turned out that I had my runtime library settings wrong. I had accidently set it to Multi-threaded DLL (/MD) for the debug configuration. It should have been Multi-threaded Debug DLL (/MDd) or Multi-threaded Debug (/MTd).

Changing Runtime Library broke std::string. Why?

1 Answers1