Is adMob's -ObjC linker flag necessary?

Question

The reason I'm asking is it builds fine without the flag.
But if I do add the flag, it throws a bunch of errors:

Undefined symbols for architecture x86_64:
  "_ACAccountTypeIdentifierTwitter", referenced from:
      -[PF_Twitter getLocalTwitterAccountAsync] in Parse(PF_Twitter.o)
  "_FBTokenInformationExpirationDateKey", referenced from:
      -[PFFacebookTokenCachingStrategy cacheTokenInformation:] in Parse(PFFacebookTokenCachingStrategy.o)
      -[PFFacebookTokenCachingStrategy expirationDate] in Parse(PFFacebookTokenCachingStrategy.o)
      -[PFFacebookTokenCachingStrategy setExpirationDate:] in Parse(PFFacebookTokenCachingStrategy.o)
  "_FBTokenInformationTokenKey", referenced from:
      -[PFFacebookTokenCachingStrategy accessToken] in Parse(PFFacebookTokenCachingStrategy.o)
      -[PFFacebookTokenCachingStrategy setAccessToken:] in Parse(PFFacebookTokenCachingStrategy.o)
  "_FBTokenInformationUserFBIDKey", referenced from:
      -[PFFacebookTokenCachingStrategy facebookId] in Parse(PFFacebookTokenCachingStrategy.o)
      -[PFFacebookTokenCachingStrategy setFacebookId:] in Parse(PFFacebookTokenCachingStrategy.o)
  "_OBJC_CLASS_$_ACAccountStore", referenced from:
      objc-class-ref in Parse(PF_Twitter.o)
  "_OBJC_CLASS_$_FBAppCall", referenced from:
      objc-class-ref in Parse(PFFacebookAuthenticationProvider.o)
  "_OBJC_CLASS_$_FBRequest", referenced from:
      objc-class-ref in Parse(PFFacebookAuthenticationProvider.o)
  "_OBJC_CLASS_$_FBSession", referenced from:
      objc-class-ref in Parse(PFFacebookAuthenticationProvider.o)
  "_OBJC_CLASS_$_FBSessionTokenCachingStrategy", referenced from:
      _OBJC_CLASS_$_PFFacebookTokenCachingStrategy in Parse(PFFacebookTokenCachingStrategy.o)
  "_OBJC_CLASS_$_SLComposeViewController", referenced from:
      objc-class-ref in Parse(PF_Twitter.o)
  "_OBJC_CLASS_$_SLRequest", referenced from:
      objc-class-ref in Parse(PF_Twitter.o)
  "_OBJC_METACLASS_$_FBSessionTokenCachingStrategy", referenced from:
      _OBJC_METACLASS_$_PFFacebookTokenCachingStrategy in Parse(PFFacebookTokenCachingStrategy.o)
  "_SLServiceTypeTwitter", referenced from:
      -[PF_Twitter getAccessTokenForReverseAuthAsync:localTwitterAccount:] in Parse(PF_Twitter.o)
      -[PF_Twitter getLocalTwitterAccountAsync] in Parse(PF_Twitter.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

from Parse SDK apparently.

However since its stated in their guide, I wonder if its alright to omit it.

I did see others having this issue, and some saying -force_load will fix it, but I'm not sure what exactly -ObjC and -force_load does, so I have no idea how to use it.

Doubt I'm missing any frameworks too since it builds fine without the flag?

Update:

I found out how to use -force_load here. But would still appreciate if someone can help explain what's going on with the -ObjC and -force_load flags.

The linker flag to use should be -force_load libGoogleAdMobAds.a instead of -ObjC.

score 0 · Answer 1 · answered Aug 28 '14 at 10:08

0

Check in your Targets->Build Phases-> Link Binary With Labraries is all required frameworks added

answered Aug 28 '14 at 10:08

Serg Tsarikovskiy

400
2
12

score 0 · Answer 2 · edited May 23 '17 at 11:49

0

You need to to link also:

Social.framework
Accounts.framework

go to the projects Build Phases->Link Binary with Libraries and add them. If you already have them try to remove them and add them back.

I have this issue and i added these and it was fixed.

Found it here Parse Starter Project LogIn and Register View Controllers Errors

edited May 23 '17 at 11:49

Community

1
1

answered Oct 23 '14 at 07:10

S4r

1
1

Is adMob's -ObjC linker flag necessary?

2 Answers2