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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 lang/v8 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, | ^ ../../src/inspector/v8-string-conversions.cc:387:26: note: in instantiation of template class 'std::basic_string<unsigned short>' requested here 387 | std::basic_string<UChar> UTF8ToUTF16(const char* stringStart, size_t length) { | ^ /usr/include/c++/v1/__fwd/string.h:23:29: note: template is declared here 23 | struct _LIBCPP_TEMPLATE_VIS char_traits; | ^ Upstream v8 has fixed this in commit 182d9c05e78 [2], so add it as a backported patch, until the next version of v8 is released. [1] https://libcxx.llvm.org/ReleaseNotes/19.html#deprecations-and-removals [2] https://chromium.googlesource.com/v8/v8.git/+/182d9c05e78 PR: 282514 Approved by: sunpoet (maintainer) MFH: 2024Q4 |
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