_ITERATOR_DEBUG_LEVEL error in visual studio

c++ visual-studio winapi compiler-construction release
KaiserJohaan picture KaiserJohaan · Jan 19, 2011 · Viewed 36.1k times · Source

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.

Cheers

Answer

Öö Tiib picture Öö Tiib · Jan 19, 2011

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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