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2019-11-04 Kamlesh Kumar <kamleshbhalui@gmail.com> gcc/cp * cp/mangle.c (write_template_arg_literal): Handle nullptr mangling. gcc * common.opt (-fabi-version): Document =14. * doc/invoke.texi (C++ Dialect Options): Likewise. gcc/c-family * c-opts.c (c_common_post_options): Update latest_abi_version. libiberty * cp-demangle.c (d_expr_primary): Handle nullptr demangling. * testsuite/demangle-expected: Added test. From-SVN: r277801