Summary of compilation errors encountered in iOS development

1:undefined Symbols for Architecture arm64:

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<code>undefined symbols for architecture arm64:    "_objc_class_$_fbsession" , referenced from:somefile ld:symbol (s) not found for architecture arm64</code>

Solution:

Project, Target (your project name), build settings and change architectures to standard architectures (ARMV7, a rmv7s), and valid architectures to ARMV7, armv7s.

Reference: http://stackoverflow.com/questions/19213782/undefined-symbols-for-architecture-arm64

2:no architectures to compile for (ARCHS=ARM6 ARM7, VALID_ARCHS=ARMV7)

Solve:

• Go Project Target > Build Settings > Architectures to Delete whatever you see there, and then add these rows one by one:

  ARMv6 armv7

  There was no ' save ' buttons there, so what I do, was adding another blank row, pressing ENTER, removing it, and then Clicki Ng out somewhere else, so the I make sure I has both of them added:

  • Now go to the Appname-info.plist file, and look for the key "Require device capabilities" and delete it all. Reference: HTTP://STACKOVERFLOW.COM/QUESTIONS/10005896/NO-ARCHITECTURES-TO-COMPILE-FOR-ARCHS-ARM6-ARM7-VALID-ARCHS-ARMV7