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Subject: [Bug libstdc++/104875] libstdc++-v3/src/c++11/codecvt.cc:312:24:
 warning: left shift count >= width of type
Date: Mon, 14 Mar 2022 13:09:23 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104875

--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jonathan Wakely <redi@gcc.gnu.org>:

https://gcc.gnu.org/g:8f7b7c1495f92c72da154d32317943a2cc276ca8

commit r12-7643-g8f7b7c1495f92c72da154d32317943a2cc276ca8
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Fri Mar 11 14:52:38 2022 +0000

    libstdc++: Fix reading UTF-8 characters for 16-bit targets [PR104875]

    The current code in read_utf8_code_point assumes that integer promotion
    will create a 32-bit int, but that's not true for 16-bit targets like
    msp430 and avr. This changes the intermediate variables used for each
    octet from unsigned char to char32_t, so that (c << N) works correctly
    when N > 8.

    libstdc++-v3/ChangeLog:

            PR libstdc++/104875
            * src/c++11/codecvt.cc (read_utf8_code_point): Use char32_t to
            hold octets that will be left-shifted.=