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I am trying to compile JRTPLIB in Visual Studio 2010 on windows 7. It's been a true nightmare... but I'm atleast narrowing down the problems.

This is left.

Error   3   error LNK2038: mismatch detected for '_ITERATOR_DEBUG_LEVEL': value '2' doesn't match value '0' in client.obj   C:\Users\Johan-bar\Documents\Visual Studio 2010\Projects\client\client\jrtplib.lib(rtpsession.obj)  client

I googled a ton and the cause seems to be one is compiled in debug mode while the other is compiled in release mode.

I am aiming to compile a Release executable because I want to test on different computers.

  1. Which one is not in Release mode, JRTPLIB or client(mine, the one which is trying to compile)?

  2. How does one change the ITERATOR_DEBUG_LEVEL? Both are using Runtime Library /MT and preprocessor definitions WIN32, _MT, along with the defaults I guess.

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  • 1
    I'd love an answer to your question #1 -- which is not in Release mode. It's not clear from the error message. Commented May 28, 2014 at 19:12

3 Answers 3

Reset to default
15

Compile everything you use with -D_ITERATOR_DEBUG_LEVEL=0 option. It is so by default in VS 2010 Release mode, but some things are still built with other options and so are not binary compatible.

In older visual studios there was _SECURE_SCL and i am not sure if some of code may still use it. Put somewhere (say into stdafx.h) a static check that these match. 

#if _ITERATOR_DEBUG_LEVEL == 0 && _SECURE_SCL != 0 
#error _SECURE_SCL != 0 when _ITERATOR_DEBUG_LEVEL == 0 
#endif

If you want to see what value _ITERATOR_DEBUG_LEVEL has then you can use some #pragma message in code to tell you.

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5 Comments

-D_ITERATOR_DEBUG_LEVEL=0 under "C / C++" -> Command line? It dosn't change anything, still same error. I added the code you mentioned, and it didn't trigger.
You used the option for both jrtplib and client? Then something in code is changing it somehow.
is there nothing else one can do? These compiler issues are really annoying, spend more time on trying to fix it than coding >.< there is no other option in VS2010?
Nope. Actually i tried since the JRTPLIB is open source ... it compiles and links just fine under VS 2010 both Release and Debug without any special treatment needed.
Nevermind, I solved it, it was a stupid problem.. I had an old debug .lib of JRTPLIB in my project folder, so it linked to that instead of the other referenced library >.<
9

The solution:

Project Pages >> Configuration Properties >> C,C++ >> Preprocessor >> Preprocessor Definitions

Add _ITERATOR_DEBUG_LEVEL=0 in there worked. See also: How to set _ITERATOR_DEBUG_LEVEL in VS2010?

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1 Comment

nice combination of 'here be the answer' and 'what does it mean'
0

I found another way to generate these errors.

I was using the Visual Studio 2010 batch build to build all possible combinations of platform and configuration and I was getting these errors. Looking at the output revealed that batch build was not honoring the project dependencies -- hence linking a stale library from the Release build witha freshly compiled Debug obj file.

Several lines later in the build output it built the Debug version of the library.

Doing the "batch build" by hand (i.e. manually selecting the various combinations of platform and configuration) produced a clean build.

Moral: Do not use Visual Studio 2010 batch build. I don't know if they've fixed this in later versions of VS.

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