libcpp/:
* include/cpplib.h (struct cpp_options): Add
warn_cxx_operator_names field.
(NODE_WARN_OPERATOR): Define.
(struct cpp_hashnode): Increase flags field to 10 bits, decrease
type to 6 bits.
* init.c (mark_named_operators): Add flags parameter.
(cpp_post_options): Pick flags value to pass to
mark_named_operators.
* lex.c (lex_identifier): If NODE_WARN_OPERATOR is set, warn that
identifier is an operator name in C++.
gcc/:
* fold-const.c (fold_unary): Rename local variable and to
and_expr.
* c-opts.c (c_common_handle_option): For -Wc++-compat set
cpp_opts->warn_cxx_operator_names.
gcc/testsuite/:
* gcc.dg/Wcxx-compat-13.c: New testcase.
From-SVN: r148438
