"Ambiguous declaration" build failure(s) — clang 3.4

PackageVersionSupposed error messageFull log Bug report
creduce 2.1.0-1IdentifierTable.h:124:3: error: reference to 'StringRef' is ambiguous Log
qtmobility 1.2.0-3qmessagecontentcontainer_qmf.cpp:65:29: error: use of overloaded operator '==' is ambiguous (with operand types 'QMailMessagePartContainer::Location' and 'const QMailMessagePart::Location') Log
stealth 2.11.03-2scanner/testexitvalue.cc:12:48: error: use of overloaded operator '!=' is ambiguous (with operand types 'FBB::A2x' and 'int') Log 745355
tango 8.1.2c+dfsg-3../../../../lib/cpp/server/w_attribute.cpp:3421:11: error: call to 'isnan' is ambiguous Log

4 errors