Note: This patch breaks Automake. Repaired within two patches.
* automake.in (Language): Replace the attribute `output_arg' with
`compile_flag' and `output_flag'.
(Automake): Adjust language registrations.
(&handle_languages): Transform `-c' and `-o' for both suffix and
per object rules, instead of `OUTARG' and `LTOUTARG' only for
generic rules.
(&handle_single_transform_list): Adjust to `compile_flag' and
`output_flag'.
* depend2.am, ext-compile.am: Use `%-c%' and `%-o%'.