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?

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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.

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Maybe it is looking at deployment target in build settings?