iPhone - Using Reachability throwing duplicate symbol _OBJC_IVAR error

Question

I have added the Apple Reachability files to my project and I am already getting errors. I have NOT even added these files to any of my classes, only added them to my project. How could I already be getting this error?

When compiling I get the following error:

ld: duplicate symbol _OBJC_IVAR_$_Reachability.localWiFiRef in /Users/webmaster/Dropbox/iPhone-Development/Official-Projects/PUC/build/PUC.build/Debug-iphonesimulator/PUC.build/Objects-normal/i386/Reachability-B40F6D608A62C635.o and /Users/webmaster/Dropbox/iPhone-Development/Official-Projects/PUC/build/PUC.build/Debug-iphonesimulator/PUC.build/Objects-normal/i386/Reachability-823B59DA9A9B0D23.o
collect2: ld returned 1 exit status
Command /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc-4.2 failed with exit code 1

Note: I am using the Three20 project, so I am not sure if it could be conflicting somehow?

score 8 · Accepted Answer · answered Feb 03 '11 at 18:41

8

So, I figured it out. I realized that since I am using ShareKit, it also includes Reachability, so it WAS in my project twice, I just didn't realize it.

answered Feb 03 '11 at 18:41

Nic Hubbard

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Cheers, was stuck on this and was sure I hadn't used Reachability – Daniel Bowden Jan 17 '12 at 12:18

score 0 · Answer 2 · answered Feb 03 '11 at 18:19

0

You need to #import your custom class's .h in your .m. Otherwise the #import "Reachability.h" is happening twice and, I'm guessing, there is a variable called localWiFiRef defined in Reachability.h that now is beind declared twice and hence the "duplicated symbol" error.

When doing that, you will not need to #import "Reachability.h" in the .m.

answered Feb 03 '11 at 18:19

fsaint

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I was doing that, I just didn't post it here. So, it seems that I still get this error even when I don't include any reachability files into my class... – Nic Hubbard Feb 03 '11 at 18:28
Is "Reachability.h" imported anyplace else? – fsaint Feb 03 '11 at 18:29
Remove all references to the Reachability files, and only have them sitting in my project. Still same error. – Nic Hubbard Feb 03 '11 at 18:29
I figured it out. I was using ShareKit which had already included Reachability, I just didn't realize it. – Nic Hubbard Feb 03 '11 at 19:38

iPhone - Using Reachability throwing duplicate symbol _OBJC_IVAR error

2 Answers2