[llvm-bugs] [Bug 40902] New: Can't compile with GCC 9 headers

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=40902

            Bug ID: 40902
           Summary: Can't compile with GCC 9 headers
           Product: clang
           Version: 8.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Frontend
          Assignee: unassignedclangbugs at nondot.org
          Reporter: steinar+llvm at gunderson.no
                CC: llvm-bugs at lists.llvm.org, neeilans at live.com,
                    richard-llvm at metafoo.co.uk

Hi,

Any include of <map> with Clang 8.0.0-+rc2-1~exp1 and headers from GCC 9.0.1
20190223 gives:

In file included from test.cc:1:
In file included from
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/map:60:
In file included from
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/stl_tree.h:67:
In file included from
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/ext/alloc_traits.h:36:
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/alloc_traits.h:604:44:
error: 'copy' is a protected member of
      'std::__is_alloc_insertable_impl'
    : __is_alloc_insertable_impl::template copy<_Alloc>
                                           ^
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/alloc_traits.h:595:7:
note: declared protected here
      using copy = decltype(_M_select<_Alloc, const _Tp&>(0));
      ^
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/alloc_traits.h:616:44:
error: 'move' is a protected member of
      'std::__is_alloc_insertable_impl'
    : __is_alloc_insertable_impl::template move<_Alloc>
                                           ^
/usr/lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/alloc_traits.h:598:7:
note: declared protected here
      using move = decltype(_M_select<_Alloc, _Tp>(0));
      ^
2 errors generated.

GCC 9 compiles the same headers just fine. I'm not sure if this should be fixed
in GCC or in Clang, though.

clang version 8.0.0-+rc2-1~exp1 (tags/RELEASE_800/rc2)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
Found candidate GCC installation: /usr/bin/../lib/gcc/i686-linux-gnu/8
Found candidate GCC installation: /usr/bin/../lib/gcc/i686-linux-gnu/9
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.8
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.8.4
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/4.9.2
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/5
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/5.5.0
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/6.5.0
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/7.4.0
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/8
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/9
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/8
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/9
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9.2
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.4.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/9
Selected GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/9
Candidate multilib: .;@m64
Selected multilib: .;@m64

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