I created a project with two targets, one for iPhone and another for Mac OsX. They both build and run well when I build them the first time (I built the OsX target first then iPhone target next). However, if I build the iPhone target and switch back to OsX target, the OsX target now thinks that it uses the iPhone SDK rather than it's own mac OsX SDK, and doesn't compile anymore (can't find the OSX SDK header files).
My build settings of the project and targets are setup correctly and the ".pbxproj" file is not changed in the process of switching targets. But I tracked down the problem to the ".pbxuser" file, specifically in the parameter "activeSDKPreference =".
Basically when I switch to iPhone target this parameter gets changed from macosx10.6 to iphonesimulator4.0, but when I switch back to OsX target it stays on iphonesimulator4.0. The only way to get it to work again is to close the project, manually change that param to macosx10.6, and reopen the project. This would solve it until I switch to iPhone again.
Is it a bug in XCode? anyone has a solution or a work around?