Commit: GAS: Add option to warn about multibyte characters

[Nick Clifton]

Hi Guys,

  I am applying the patch below to add a new option to the assembler.
  The option enables the generation of warning messages when multibyte
  characters are found in the input.  It has two modes, in the first it
  will warn about multibyte characters detected anywhere in the input
  stream.  In the second mode the warnings are only generated when
  multibyte characters are used in the names of defined symbols.  The
  point of the second mode is that whilst there may be good reasons for
  multibyte characters to appear in the input - in comments, output
  strings, and so on, it is rare that they will be used in symbol names.

Cheers
  Nick
  
gas/ChangeLog
2021-11-18  Nick Clifton  <nickc@redhat.com>

	* as.c (parse_args): Add support for --multibyte-handling.
	* as.h (multibyte_handling): Declare.
	* app.c (scan_for_multibyte_characters): New function.
	(do_scrub_chars): Call the new function if multibyte warning is
	enabled.
	* input-scrub,c (input_scrub_next_buffer): Call the multibyte
	scanning function if multibyte warnings are enabled.
	* symbols.c (struct symbol_flags): Add multibyte_warned bit.
	(symbol_init): Call the multibyte scanning function if multibyte
	symbol warnings are enabled.
	(S_SET_SEGMENT): Likewise.
	* NEWS: Mention the new feature.
	* doc/as.texi: Document the new feature.
	* testsuite/gas/all/multibyte.s: New test source file.
	* testsuite/gas/all/multibyte1.d: New test driver file.
	* testsuite/gas/all/multibyte1.l: New test expected output.
	* testsuite/gas/all/multibyte2.d: New test driver file.
	* testsuite/gas/all/multibyte2.l: New test expected output.
	* testsuite/gas/all/gas.exp: Run the new tests.

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