PR libfortran/29649
* gfortran.h (gfc_option_t): Add flag_dump_core.
* lang.opt: Add -fdump-core option.
* invoke.texi: Document the new options.
* trans-decl.c (gfc_build_builtin_function_decls): Add new
options to the call to set_std.
* options.c (gfc_init_options, gfc_handle_option): Set the
new options.