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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 emulators/open-vm-tools to fail to compile with clang 19 and libc++ 19. This can be fixed by using the standard type std::u16string for UTF-16 strings, instead of (effectively) std::basic_string<uint16_t>. [1] https://libcxx.llvm.org/ReleaseNotes/19.html#deprecations-and-removals
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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 emulators/open-vm-tools to fail to compile with clang 19 and
libc++ 19.
This can be fixed by using the standard type std::u16string for UTF-16
strings, instead of (effectively) std::basic_string<uint16_t>.
[1] https://libcxx.llvm.org/ReleaseNotes/19.html#deprecations-and-removals