Ios-xcode upgrade to 5.1& iOS upgrade to iOS7.1 issue: Undefined Symbols for architecture x86_64

One of the new features of Xcode upgrade to 5.1 is that all apps are compiled by default with a 64-bit compiler. Originally in the xcode5.0.x when the default standard architectures only (arm7,armv7s), by the default after 5.1 with arm64 parameters.


The current temporary solution is


1. Turn 1. Select Targets->build settings->architectures.


Change build active architectures only to NO.


2. Remove the arm64 parameter from the bottom valid architectures to remove it.


Or:


Double-click Architectures, select Other, delete $ (arch_standard), and then increase armv7 and armv7s (write on: $ (archs_standard_32_bit)).

Ios-xcode upgrade to 5.1& iOS upgrade to iOS7.1 issue: Undefined Symbols for architecture x86_64