[LLVMbugs] [Bug 9316] New: block scope extern function declaration not receiving external linkage

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=9316

           Summary: block scope extern function declaration not receiving
                    external linkage
           Product: clang
           Version: unspecified
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: chandlerc at gmail.com
                CC: llvmbugs at cs.uiuc.edu, dgregor at apple.com


% cat t.cc
extern "C" {
  namespace {
  class X {
    int f() {
      extern int puts(const char* s);
      return puts("help!");
    }
  };
  }
}

% clang -fsyntax-only t.cc
% ./third_party/llvm/crosstool/unstable/clang/bin/clang -fsyntax-only t.cc
t.cc:8:18: warning: function 'puts' has internal linkage but is not defined
      extern int puts(const char* s);
                 ^
t.cc:9:14: note: used here
      return puts("help!");
             ^
1 warning generated.


My reading of the standard says that 'puts' should receive external linkage.

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