re PR driver/15303 (When gcc sees an unrecognized option, the exit status indicates...

re PR driver/15303 (When gcc sees an unrecognized option, the exit status indicates success)

	PR driver/15303
	* gcc.c (inform, warning, inform): New functions.
	(fatal_ice): Rename to internal_error; change cmsgid parameter to
	gmsgid.  All callers changed.
	(notice): Rename to fnotice; add parameter fp.  All callers
	changed.
	(fatal_error): Rename to fatal_signal.  All users changed.
	(fatal): Rename to fatal_error; change cmsgid parameter to
	gmsgid.  All callers changed.
	(process_command): Use warning instead of error for warnings.
	(end_going_arg): Don't use _() around argument of error.
	(do_spec_1): Use inform for message from %n specs.  Use warning
	instead of error for warnings.
	(main): Use inform for comparison messages.  Use warning for
	message about unused linker input.
	(error): Increment error_count.  Print "error: ".
	* gcc.h (fatal): Change to fatal_error.
	(warning): Declare.
	* config/darwin-driver.c (darwin_default_min_version): Use warning
	instead of fprintf for warnings.
	* cppspec.c (lang_specific_driver): Use fatal_error instead of
	fatal.

cp:
	* g++spec.c (lang_specific_driver): Use fatal_error instead of
	fatal.

fortran:
	* gfortranspec.c (append_arg, lang_specific_driver): Use
	fatal_error instead of fatal.  Use warning instead of fprintf for
	warnings.

java:
	* jvspec.c (lang_specific_driver): Use fatal_error instead of
	fatal.  Use warning instead of error for warnings.

From-SVN: r159986