I am trying to port a small app of mine from Win XP and VS 2005 to Win 7 and VS 2010.
The app compiles and runs smoothly in Debug mode, however in Release mode I get the following error:
pcrecpp.lib(pcrecpp.obj) : error LNK2038: mismatch detected for
'_ITERATOR_DEBUG_LEVEL': value '0' doesn't match value '2' in LoginDlg.obj
Where should I start checking?
Your app is being compiled in release mode, but you're linking against the debug version of PCRE, which had /MTd (or similar) set, thus causing the mismatch in iterator debugging level in the CRT.
Recompile PCRE in release mode to match your own application.
The detect_mismatch pragma in VS 2010 is what causes this error to be emitted.
See http://blogs.msdn.com/b/vcblog/archive/2009/06/23/stl-performance.aspx (search for _ITERATOR_DEBUG_LEVEL)
I had the same error. In my case the solution is easy: I had one project A depending on another project B. B had a preprocessor definition _DEBUG in debug mode and A didn't.
Just add _DEBUG to project A(project->properties->c++->preprocessor->preprocessor definitions) and you're done.
My problem was that dependent project used "Use Multi-Byte Character Set"
under Generl-->Character set. while other project had "No Set" value
This can also be caused by setting the preprocessor definition _HAS_ITERATOR_DEBUGGING=0 in project B and not in A where A produces a lib used by B.
来源：https://stackoverflow.com/questions/4061929/linker-error-lnk2038-mismatch-detected-in-release-mode