error: Invalid bitcode version (Producer: '800.0.35.0_0' Reader: '703.0.31_0')

Question

When I try to Archive my application on Xcode 7.3.1, I am getting following error:

error: Invalid bitcode version (Producer: \'800.0.35.0_0\' Reader:

Answer 1

The error basically says:

The static linker could not correctly link a certain bitcode bundle, which was produced using Producer: '902.0.39.2', and is being read using Reader: '900.0.37'.

You can look up at https://gist.github.com/yamaya/2924292 to identify the Xcode versions for the corresponding compiler versions. In the current case, the reader (our Xcode version) is Xcode 9.0, whereas the producer (Xcode version of typically a third party SDK) is Xcode 9.4. The incompatibility between the two is the root cause of this issue.

You may either:

• turn off the bitcode as discussed in other answers, or
• roll-back the SDK to a previous version that worked well, or
• update your codebase to use the newer Xcode version.