On Thu, Oct 7, 2021 at 9:01 AM Jakub Jelinek via Gcc-patches
<gcc-patches@gcc.gnu.org> wrote:
> And another thing, if HOST_CHARSET == HOST_CHARSET_EBCDIC, how does the
> libcpp/lex.c
> static const cppchar_t utf8_signifier = 0xC0;
> ...
> if (*buffer->cur >= utf8_signifier)
> {
> if (_cpp_valid_utf8 (pfile, &buffer->cur, buffer->rlimit, 1 +
> !first,
> state, &s))
> return true;
> }
> work? Because in UTF-EBCDIC, >= 0xC0 isn't the right test for start of
> multi-byte character, it is more complicated and seems _cpp_valid_utf8
> assumes UTF-8 as the host charset.
FWIW, here I was following Joseph's guidance from
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67224#c21 ("You can
ignore anything claiming to handle UTF-EBCDIC.")
-Lewis
