Why does my Mac OS X Xcode 4.2 project think I've set an OS X target lower than 10.3

I get compile failures because "NSSegmentedControl" (which I use) is reported to be unavailable on OS X prior to 10.3. Fine.. but I've set my project to 10.7 everywhere. Same issues with Clang and GCC.

Is there a limitation to creating 32-bit OSX applications开发者_Go百科 on Lion?

I believe it's a bug in Xcode.

While the default Deployment document versioning setting for nib files seems to be Project SDK Version (Mac OS X 10.7) like shown in the image below, Xcode actually seems to be using All Versions of Mac OS X.

If you change the Deployment target to be a specific version of Mac OS X, rather than the Project SDK Version, (like in the image below), it should prevent the errors.

Maybe it is looking at deployment target in build settings?