Using clang+llvm from Xcode 3 project yields 1.5k linkage warnings

I’m using Xcode 3 to program with LLVM and Clang (both about yesterday’s latest revisions), and when I compile, I get 1501 link-time warnings. All those I read were about symbol visibility. Here’s an example:

ld: warning: namespace::class::method() has different visibility (default) in /usr/local/lib/libclangCodeGen.a(CodeGenAction.o) and (hidden) in /Users/myself/Projets/path/build/project.build/Debug/project.build/Objects-normal/x86_64/object.o

1501 seems large enough that it could simply be all symbols referenced from the static libraries. It works anyways though.

What am I doing wrong? As usual with stuff causing spectacular diagnostics, I must be missing something fairly elementary.

Hi Félix,

The most likely cause of this is that you’re building some llvm code with -fvisibility-inlines-hidden. Xcode likes to add this flag by default, you can change it in the target build options.

-Chris

Yes, that was it. Thank you very much.