[llvm-bugs] [Bug 33141] New: -Wmissing-prototypes false positive for function indirectly in anonymous namespace

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=33141

            Bug ID: 33141
           Summary: -Wmissing-prototypes false positive for function
                    indirectly in anonymous namespace
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: abigail.buccaneer at gmail.com
                CC: llvm-bugs at lists.llvm.org

Consider the following C++ code:

    void global() {}
    namespace { void anonymous() {} }
    namespace detail { void detail() {} }
    namespace detail { namespace { void detail_anonymous() {} } }
    namespace { namespace detail { void anonymous_detail() {} } }

The functions global() and detail() should result in -Wmissing-prototypes
warnings. Clang 3.7 to trunk correctly warn on those, but also incorrectly warn
on anonymous_detail(). Clang does correctly optimize out anonymous_detail()
when it's unused.

GCC 4.9 to 6.3 (with '-Wmissing-declarations') correctly warns only on global()
and detail().

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