830     flag_gnu89_inline = !flag_isoc99;  in c_common_post_options()
831   else if (!flag_gnu89_inline && !flag_isoc99)  in c_common_post_options()
893     warn_implicit_function_declaration = flag_isoc99;  in c_common_post_options()
897     warn_implicit_int = flag_isoc99;  in c_common_post_options()
901     warn_shift_overflow = cxx_dialect >= cxx11 || flag_isoc99;  in c_common_post_options()
906 				 && (cxx_dialect >= cxx11 || flag_isoc99));  in c_common_post_options()
1336 			&& (c_dialect_cxx () ? cxx_dialect == cxx98 : !flag_isoc99));  in sanitize_cpp_opts()
1563   flag_isoc99 = 0;  in set_std_c89()
1577   flag_isoc99 = 1;  in set_std_c99()
1591   flag_isoc99 = 1;  in set_std_c11()
1605   flag_isoc99 = 1;  in set_std_c17()
1620   flag_isoc99 = 0;  in set_std_cxx98()
1635   flag_isoc99 = 1;  in set_std_cxx11()
1650   flag_isoc99 = 1;  in set_std_cxx14()
1665   flag_isoc99 = 1;  in set_std_cxx17()
1681   flag_isoc99 = 1;  in set_std_cxx2a()