https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106426
--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Joseph Myers <js...@gcc.gnu.org>: https://gcc.gnu.org/g:053876cdbe8057210e6f4da4eec2df58f92ccd4c commit r13-1994-g053876cdbe8057210e6f4da4eec2df58f92ccd4c Author: Tom Honermann <t...@honermann.net> Date: Tue Aug 2 14:36:02 2022 -0400 preprocessor/106426: Treat u8 character literals as unsigned in char8_t modes. This patch corrects handling of UTF-8 character literals in preprocessing directives so that they are treated as unsigned types in char8_t enabled C++ modes (C++17 with -fchar8_t or C++20 without -fno-char8_t). Previously, UTF-8 character literals were always treated as having the same type as ordinary character literals (signed or unsigned dependent on target or use of the -fsigned-char or -funsigned char options). PR preprocessor/106426 gcc/c-family/ChangeLog: * c-opts.cc (c_common_post_options): Assign cpp_opts->unsigned_utf8char subject to -fchar8_t, -fsigned-char, and/or -funsigned-char. gcc/testsuite/ChangeLog: * g++.dg/ext/char8_t-char-literal-1.C: Check signedness of u8 literals. * g++.dg/ext/char8_t-char-literal-2.C: Check signedness of u8 literals. libcpp/ChangeLog: * charset.cc (narrow_str_to_charconst): Set signedness of CPP_UTF8CHAR literals based on unsigned_utf8char. * include/cpplib.h (cpp_options): Add unsigned_utf8char. * init.cc (cpp_create_reader): Initialize unsigned_utf8char.
