I have a 3rd party .a library, which is apparently compiled for only armv6 compatibility, where both new Xcodes (3.2.6 and 4), both now require a separate armv7 slice to run on the device. The link error is: file is universal but does not contain a(n) armv7 slice for architecture armv7.
Anyone know how to make either of the two new Xcode operate as 3.2.5 did and accept the existing library while I'm waiting for the library vendor to cook up an armv7 version?
In Project Settings, select "Standard" for the architecture (not "Optimized"). This should allow you to select "armv6" for the Active Architecture. This means it should also work on older devices (barring any other deprecations) once it's on the app store.
Nothing worked for me until I set "Build Active Architecture Only" to No.
来源：https://stackoverflow.com/questions/5266576/way-to-restore-xcode-to-accept-armv6-architecture