[LLVMbugs] [Bug 15558] New: False positive for -Wunused-variable with static member of internal-linkage type

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=15558

            Bug ID: 15558
           Summary: False positive for -Wunused-variable with static
                    member of internal-linkage type
           Product: clang
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Frontend
          Assignee: unassignedclangbugs at nondot.org
          Reporter: matthewbg at google.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

$ cat test.cc
namespace {
class Bar {};
}
class Foo {
  static Bar b;
};
$ clang -fsyntax-only -Wunused-variable test.cc
test.cc:5:14: warning: unused variable 'b' [-Wunused-variable]
  static Bar b;
             ^

In the actual code I found this in, 'Foo' and 'Bar' are defined in foo.h, which
is included into both foo.cc, which uses 'b', and foo_test.cc, which doesn't
use 'b'; we produce a warning when compiling foo_test.cc.

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