Add multibyte character warning option to the assembler.

	* 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.

1 files changed, 8 insertions, 0 deletions

diff --git a/gas/NEWS b/gas/NEWS
index aac75220cfe..4288e6213dd 100644
--- a/gas/NEWS
+++ b/gas/NEWS
@@ -13,6 +13,14 @@
 
 * Add support for Scalable Matrix Extension (SME) for AArch64.
 
+* The --multibyte-handling=[allow|warn|warn-sym-only] option tells the
+  assembler what to when it encoutners multibyte characters in the input.  The
+  default is to allow them.  Setting the option to "warn" will generate a
+  warning message whenever any multibyte character is encountered.  Using the
+  option to "warn-sym-only" will make the assembler generate a warning whenever a
+  symbol is defined containing multibyte characters.  (References to undefined
+  symbols will not generate warnings).
+
 * Outputs of .ds.x directive and .tfloat directive with hex input from
   x86 assembler have been reduced from 12 bytes to 10 bytes to match the
   output of .tfloat directive.