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48aefee896
As noted in the libc++ 19 release notes [1], std::char_traits<> is now
only provided for char, char8_t, char16_t, char32_t and wchar_t, and any
instantiation for other types will fail.
This causes devel/binutils to fail to compile with clang 19 and libc++
19, resulting in errors similar to:
/usr/include/c++/v1/string:820:42: error: implicit instantiation of undefined template 'std::char_traits<unsigned short>'
820 | static_assert(is_same<_CharT, typename traits_type::char_type>::value,
| ^
./stringpool.h:225:35: note: in instantiation of template class 'std::basic_string<unsigned short>' requested here
225 | { return this->add_with_length(s.data(), s.size(), copy, pkey); }
| ^
stringpool.cc:530:7: note: in instantiation of member function 'gold::Stringpool_template<unsigned short>::add' requested here
530 | class Stringpool_template<uint16_t>;
| ^
/usr/include/c++/v1/__fwd/string.h:23:29: note: template is declared here
23 | struct _LIBCPP_TEMPLATE_VIS char_traits;
| ^
Upstream binutils has fixed this in commit 5e9091dab88 [2], so import it
as a separate patch, until the next version of binutils is released.
[1] https://libcxx.llvm.org/ReleaseNotes/19.html#deprecations-and-removals
[2] https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=5e9091dab88
PR: 280563
Approved by: cy (maintainer)
MFH: 2024Q3
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