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sys/_types.h: recognise char8_t as a builtin type in C++20
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Authored by fuz on Dec 8 2025, 12:38 PM.
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Details

Summary

Unlike in C23 where it's a typedef, char8_t is a built in type in
C++20. Recognise it as such.

PR: 291449
Reported by: Tomoaki AOKI <junchoon@dec.sakura.ne.jp>

Test Plan

system builds fine with this change, www/qt6-webengine builds too.

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rG FreeBSD src repository
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