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Subject: [Bug 280562] [exp-run] Against llvm-19-update branch on GitHub
Date: Thu, 24 Oct 2024 22:10:48 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D280562

--- Comment #96 from commit-hook@FreeBSD.org ---
A commit in branch main references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=3Da3a88aa132605c5d42153a419c0e12929=
6dec467

commit a3a88aa132605c5d42153a419c0e129296dec467
Author:     Dimitry Andric <dim@FreeBSD.org>
AuthorDate: 2024-10-24 21:42:36 +0000
Commit:     Dimitry Andric <dim@FreeBSD.org>
CommitDate: 2024-10-24 22:09:33 +0000

    Fix buildworld with gcc 13 after llvm-19 import

    It turns out the new libc++ 19 headers result in a -Werror warning from
    gcc 13:

      In file included from
/usr/obj/usr/src/freebsd/src/amd64.amd64/tmp/usr/include/c++/v1/__memory/sh=
ared_ptr.h:31:
=20=20=20=20=20
/usr/obj/usr/src/freebsd/src/amd64.amd64/tmp/usr/include/c++/v1/__memory/un=
initialized_algorithms.h:
In instantiation of 'constexpr void
std::__1::__uninitialized_allocator_relocate(_Alloc&, _Tp*, _Tp*, _Tp*) [wi=
th
_Alloc =3D allocator<basic_string<char> >; _Tp =3D basic_string<char>]':
=20=20=20=20=20
/usr/obj/usr/src/freebsd/src/amd64.amd64/tmp/usr/include/c++/v1/vector:1052=
:42:
  required from 'void std::__1::vector<_Tp,
_Alloc>::__swap_out_circular_buffer(std::__1::__split_buffer<_Tp,
_Allocator&>&) [with _Tp =3D std::__1::basic_string<char>; _Allocator =3D
std::__1::allocator<std::__1::basic_string<char> >]'
=20=20=20=20=20
/usr/obj/usr/src/freebsd/src/amd64.amd64/tmp/usr/include/c++/v1/vector:1469=
:31:
  required from 'void std::__1::vector<_Tp, _Alloc>::reserve(size_type) [wi=
th
_Tp =3D std::__1::basic_string<char>; _Allocator =3D
std::__1::allocator<std::__1::basic_string<char> >; size_type =3D long unsi=
gned
int]'
      /usr/src/freebsd/src/contrib/googletest/googletest/src/gtest.cc:795:2=
7:=20=20
required from here
=20=20=20=20=20
/usr/obj/usr/src/freebsd/src/amd64.amd64/tmp/usr/include/c++/v1/__memory/un=
initialized_algorithms.h:645:21:
error: 'void* __builtin_memcpy(void*, const void*, long unsigned int)' writ=
ing
to an object of type 'std::__1::__remove_const_t<std::__1::basic_string<cha=
r>
>' {aka 'class std::__1::basic_string<char>'} with no trivial copy-assignme=
nt;
use copy-assignment or copy-initialization instead o[-Werror=3Dclass-memacc=
ess]
        645 |=20=20=20=20
__builtin_memcpy(const_cast<__remove_const_t<_Tp>*>(__result), __first,
sizeof(_Tp) * (__last - __first));
            |=20=20=20=20
~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~=
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      In file included from
/usr/obj/usr/src/freebsd/src/amd64.amd64/tmp/usr/include/c++/v1/__system_er=
ror/error_category.h:15,
                       from
/usr/obj/usr/src/freebsd/src/amd64.amd64/tmp/usr/include/c++/v1/__system_er=
ror/error_code.h:18,
                       from
/usr/obj/usr/src/freebsd/src/amd64.amd64/tmp/usr/include/c++/v1/__ostream/b=
asic_ostream.h:16:
=20=20=20=20=20
/usr/obj/usr/src/freebsd/src/amd64.amd64/tmp/usr/include/c++/v1/string:752:=
7:
note: 'std::__1::__remove_const_t<std::__1::basic_string<char> >' {aka 'cla=
ss
std::__1::basic_string<char>'} declared here
        752 | class basic_string {
            |       ^~~~~~~~~~~~

    Since this is all benign, turn off errors for -Wclass-memaccess.

    PR:             280562
    MFC after:      3 days

 share/mk/bsd.sys.mk | 1 +
 1 file changed, 1 insertion(+)

--=20
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