How to Debug Webtrends.framework Linker Problems

You are trying to integrate Webtrends Analytics library as Webtrends.framework into your application and linker fails with lots of undefined symbols:

Another reason for "Undefined symbols referenced from"

Failed to add a static library into my iPhone application. Doing everything I've done earlier, searching for new tips on internet, recreating static library project dozens of times - and still:

Undefined symbols:
"_xmlDocSetRootElement", referenced from:
+[CXMLNode(CXMLNode_CreationExtensions) documentWithRootElement:] in libTouchXML.a
ld: symbol(s) not found
collect2: ld returned 1 exit status

Finally found out that even though my version of TouchXML links to dynamic libxml2, I need to link libxml2 with application, too! Expected that once would be enough. Now wondering whether it really will be linked twice.

Unexpected File Type 'wrapper.pb-project' in Frameworks & Libraries build phase

This is a XCode project dependency analysis warning and most likely means your project is missing something you expected to be there. There are similar warning notes for both build and link phases. More info at "Xcode's Plugin Interface".

warning: skipping file '/Users/jounimiettunen/svn_iphone/project/trunk/protobuf/ProtocolBuffers.xcodeproj' (unexpected file type 'wrapper.pb-project' in Frameworks & Libraries build phase)

It means that building or linking something failed, in this case ProtocolBuffers static library. Possible reasons are missing "Linked Libraries" and/or "Direct Dependencies" definitions or that building those failed.

Possible Fix: make sure your target (Info - General) has correct setup. If you're using Apple SDK 4.0 add -ObjC into "Other Linker Flags" and also -all_load to force loading of everything. Make sure you do this for both project and target. More info at Mac OS X Reference Library "Technical Q&A QA1490": Building Objective-C static libraries with categories.