I'm trying to use the Twitter libraries and after adding liboauth.a and adding oauthconsumeriphonelib to my header search path, I'm now down to 1 compilation error, which I can't seem to get rid of.
ld: library not found for -loauth
Command /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc-4.2 failed with exit code 1
Anyone know what could be causing this?
Continuing to What Robin suggested You also need to set the Library Search Path. Right Click the Target File and Choose -- Get Info else you can also get the same by choosing Edit Actice Target Under the Project Tab in XCode. Look for Library Search Path and add this "$(SRCROOT)/Twitter+OAuth/SAOAuthTwitterEngine" Where Twitter+OAuth/SAOAuthTwitterEngine is the directory path for Twitter Library in project folder. I hope this will fix the problem.
Well @Nefsu you need to add those libraries to your project by adding an existing framework and then giving the path of the libraries you want to use.
And if you have already added the libraries by drag and drop, than dont remove them just add existing framework by right clicking on groups and folders and add the libraries from the folder and you will be done
I discovered this HIGHLY misleading message while trying to upgrade to the new Google Analytics library.
In my case the problem was having TWO CONFLICTING COPIES of the library. They were in different folders but both were listed in my App's Library Build Paths (under Build Settings).
Moving all the deprecated library files out of the folder ended up doing the trick and made the mysterious error messages go away.
来源：https://stackoverflow.com/questions/4895947/xcode-compiler-error-ld-library-not-found-for-loauth