ObjectiveC linking issue

[mattevigo]

Following the objectivec integration guide in a new project: https://github.com/google/protobuf/blob/master/objectivec/README.md#building

XCode exits with the following linking error:

Undefined symbols for architecture arm64:
  "_OBJC_CLASS_$_GPBDuration", referenced from:
      l_OBJC_CLASSLIST_SUP_REFS_$_.28 in GPBWellKnownTypes.o
      l_OBJC_$_CATEGORY_GPBDuration_$_GBPWellKnownTypes in GPBWellKnownTypes.o
  "_OBJC_CLASS_$_GPBAny", referenced from:
      l_OBJC_$_CATEGORY_GPBAny_$_GBPWellKnownTypes in GPBWellKnownTypes.o
  "_OBJC_CLASS_$_GPBTimestamp", referenced from:
      l_OBJC_CLASSLIST_SUP_REFS_$_ in GPBWellKnownTypes.o
      l_OBJC_$_CATEGORY_GPBTimestamp_$_GBPWellKnownTypes in GPBWellKnownTypes.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Can you help please?

[thomasvl]

Sorry about that, at one point those generated files weren't nested, and when that changed the docs never got updated. They should be correct now. You also need the headers/sources in objectivec/google/protobuf.