Upgrading to xcode 4 error No architectures to compile for

Question

I am getting an error after upgrading to xcode 4, for all of the library projects that my application depends on.

[BEROR]No architectures to compile f

Answer 1

If this error occures in combination with Phonegap the solution is:

Add "i386" in the build settings to the "Valid Architectures": for your project and the library (PhoneGapLib.xcodeProj). In both cases for the project and the target.

Answer 2

Had similar issues with xcode6 it seems to pop when upgrading xcode, tried all of what is suggested with no success what worked for me was in the new xcode created a simple new app(tabbed) and made sure my App had the same settings for architectures