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So do -f, -l, -insert, etc.  --kill gets negative priority.
Everything else gets positive priority.

       SIGCPULIM, if they are defined.

(main): Implement --version.

(sort_args): Don't overwrite the terminating null pointer.

(main): Change calls to argmatch.

when a filter or sentinel tries to modify it.

(main): Call sort_args.
Check for -d/-display after -nw, -batch, -help.
Accept --display, with arg attached or separate.

invoking memory_warnings just before unexec-ing.

(main): Recognize --longopt synonyms for all options handled here.  Add --help
and --version.

(syms_of_emacs): Initialize it.

(init_cmdargs): When setting dir, expand the dir name.

(shut_down_emacs): Don't call intern.

when setting Vinstallation_directory.
(syms_of_emacs): Make Lisp vars invocation-name, invocation-directory
and installation-directory.

when setting Vinstallation_directory.

(__do_global_dtors): Don't define if GCC_CTORS_IN_LIBC.
(__CTOR_LIST__, __DTOR_LIST__): Likewise.

and Vinstallation_directory.