[LLVMbugs] [Bug 16286] New: -Wmissing-declarations is not implemented to mean what GCC means

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=16286

            Bug ID: 16286
           Summary: -Wmissing-declarations is not implemented to mean what
                    GCC means
           Product: clang
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Frontend
          Assignee: unassignedclangbugs at nondot.org
          Reporter: b.r.longbons at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 10660
  --> http://llvm.org/bugs/attachment.cgi?id=10660&action=edit
basic test case for both warnings

Even more than the still-unfixed bug #4803, I find -Wmissing-declarations
essential in C++ to make accidental parameter mismatches compiler errors rather
than linker errors.

However, -Wmissing-declarations seems to be used for something else, as in bug
#10830.

Additionally, you could emit better warnings than GCC if, when emitting the
warning for -Wmissing-declarations, you also emit the location of any
declarations this definition is overloading.

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