[LLVMbugs] [Bug 8129] New: clang++ not suppressing warnings in standard headers.

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=8129

           Summary: clang++ not suppressing warnings in standard headers.
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: lhames at gmail.com
                CC: llvmbugs at cs.uiuc.edu, dgregor at apple.com


Created an attachment (id=5478)
 --> (http://llvm.org/bugs/attachment.cgi?id=5478)
Test case.

Running

clang++ -Wall -Werror -c test.cpp

on the attached test case (an empty c++ file which #includes valarray)
terminates with warnings treated as errors (attached below). I think this
should be suppressed for standard headers, right?

System is Ubuntu Linux 10.04 (AMD64).

- Lang.

clang++ output:

error: class '_Array' was previously declared as a struct [-Wmismatched-tags]
In file included from foo.cpp:1:
In file included from /usr/include/c++/4.4/valarray:561:
/usr/include/c++/4.4/bits/valarray_after.h:57:24: note: in instantiation of
template class 'std::valarray<unsigned long>' requested here
      { return _M_index.size(); }
                       ^
In file included from foo.cpp:1:
In file included from /usr/include/c++/4.4/valarray:86:
/usr/include/c++/4.4/bits/valarray_array.h:409:12: note: previous use is here
    struct _Array
           ^
error: class '_Array' was previously declared as a struct [-Wmismatched-tags]
In file included from foo.cpp:1:
In file included from /usr/include/c++/4.4/valarray:565:
/usr/include/c++/4.4/bits/mask_array.h:143:27: note: in instantiation of
template class 'std::valarray<bool>' requested here
    : _M_sz(__s), _M_mask(__m), _M_array(__a) {}
                          ^
In file included from foo.cpp:1:
In file included from /usr/include/c++/4.4/valarray:86:
/usr/include/c++/4.4/bits/valarray_array.h:409:12: note: previous use is here
    struct _Array
           ^
2 errors generated.

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