iOS ZipArchive compile error:invalid deployment target for -stdlib=libc++ (requires iOS 5.0 or later)

I'm using zipArchive library in Xcode to integrate into my project to do unzip operation. And I got following compile error message. my question is how can i resolve this compile issue? What steps will reproduce the problem? download ziparchive from http://code.google.com/p/ziparchive/: create a new xcode project (just use single view template), select ios4.3 simulator drag the download unzipped f

[sidecode]

The file ZipArchive.mm from the ziparchive project has the suffix .mm for Objective-C++ files.