pdp11.h (TARGET_SWITCHES): Add option to vary assembler syntax.

pdp11.h (TARGET_SWITCHES): Add option to vary assembler syntax.

1999-04-09  Joseph S. Myers  <jsm28@cam.ac.uk>
	* pdp11.h (TARGET_SWITCHES): Add option to vary assembler syntax.
	(TARGET_DEFAULT): Possibly use UNIX syntax.
	(TARGET_UNIX_ASM, TARGET_UNIX_ASM_DEFAULT): New macros.
	(REGISTER_NAMES): Use "r5" instead of "fp".
	(ASM_OUTPUT_ALIGN): Use ".even" directive, and abort for any
	greater alignment.
	* 2bsd.h (TARGET_UNIX_ASM_DEFAULT): Default to UNIX assembler
	syntax for 2BSD.
	* pdp11.c (output_ascii): Use working syntax for ".byte".
	(print_operand_address): Use "*" instead of "@" when using UNIX
	assembler syntax.

From-SVN: r26325