Description of problem:
Compiling a simple C++ file, linked with -lprotobuf fails, while doing the exact same thing works with g++.
This used to work in previous versions (don’t know if this is caused by something in the f23 rebuild, or the 3.7 version).

Version-Release number of selected component (if applicable):
clang-3.7.0-1.fc23
protobuf-devel-2.6.1-2.fc23.x86_64


Steps to Reproduce:
1. echo "message Test{required bool val = 1;}" > test.proto
2. protoc test.proto --cpp_out=.
3. echo '#include "test.pb.h"\nint main(){ Test t; return t.ShortDebugString().size(); }' > main.cpp
4. clang++ main.cpp test.pb.cc -lprotobuf 


Actual results:
main.cpp:(.text+0x28): undefined reference to `google::protobuf::Message::ShortDebugString() const'
clang: error: linker command failed with exit code 1 (use -v to see invocation)


Expected results:
Should compile (just like using g++ does) without any error.