Hello!

Attached patch enables alpha to use generic config/elfos.h headers on
linux and *bsd targets. The most important difference to generic
elfos.h is in

	* config/alpha/elf.h (TARGET_ASM_FILE_START_FILE_DIRECTIVE): Undefine.

and

	* config/alpha/alpha.h (NO_DOLLAR_IN_LABEL): Undefine.

Otherwise, the patch is very carefully written to not change anything
in alpha.h (it only #undefines some symbols before #define and removes
READOLNY_DATA_SECTION_ASM_OP that is always defined elsewhere), so VMS
target should continue to work without problems.

2012-03-21  Uros Bizjak  <ubizjak@gmail.com>

	* config.gcc (alpha*-*-linux*): Add elfos.h to tm_file.
	(alpha*-*-freebsd*): Ditto.
	(alpha*-*-netbsd*): Ditto.
	(alpha*-*-openbsd*): Ditto.
	* config/alpha/elf.h (OBJECT_FORMAT_ELF): Remove.
	(DWARF2_DEBUGGING_INFO): Remove.
	(PREFERRED_DEBUGGING_TYPE): Remove.
	(ASM_FINAL_SPEC): Remove.
	(IDENT_ASM_OP): Remove.
	(ASM_OUTPUT_IDENT): Remove.
	(SKIP_ASM_OP): Remove.
	(ASM_OUTPUT_SKIP): Remove.
	(ALIGN_ASM_OP): Remove.
	(ASM_OUTPUT_BEFORE_CASE_LABEL): Remove.
	(ASM_OUTPUT_CASE_LABEL): Remove.
	(ASM_OUTPUT_EXTERNAL_LIBCALL): Remove.
	(COMMON_ASM_OP): Remove.
	(ASM_OUTPUT_ALIGNED_COMMON): Remove.
	(ASCII_DATA_ASM_OP): Remove.
	(READONLY_DATA_SECTION_ASM_OP): Remove.
	(INIT_SECTION_ASM_OP): Remove.
	(FINI_SECTION_ASM_OP): Remove.
	(ASM_SECTION_START_OP): Remove.
	(ASM_OUTPUT_SECTION_START_FILE): Remove.
	(TARGET_ASM_NAMED_SECTION): Remove.
	(TARGET_ASM_SELECT_SECTION): Remove.
	(MAKE_DECL_ONE_ONLY): Remove.
	(TYPE_ASM_OP): Remove.
	(SIZE_ASM_OP): Remove.
	(ASM_WEAKEN_LABEL): Remove.
	(TYPE_OPERAND_FMT): Remove.
	(ASM_DECLARE_RESULT): Remove.
	(ASM_DECLARE_OBJECT_NAME): Remove.
	(ASM_FINISH_DECLARE_OBJECT): Remove.
	(ELF_ASCII_ESCAPES): Remove.
	(ELF_STRING_LIMIT): Remove.
	(STRING_ASM_OP): Remove.
	(ASM_OUTPUT_EXTERNAL): Remove.
	(TARGET_ASM_FILE_START_FILE_DIRECTIVE): Undefine.
	* config/alpha/alpha.h (PCC_BITFIELD_TYPE_MATTERS): Undefine
	before define.
	(ASM_DECLARE_FUNCTION_NAME): Ditto.
	(ASM_DECLARE_FUNCTION_SIZE): Ditto.
	(USER_LABEL_PREFIX): Ditto.
	(ASM_GENERATE_INTERNAL_LABEL): Ditto.
	(ASM_OUTPUT_ASCII): Ditto.
	(ASM_OUTPUT_SKIP): Ditto.
	(READONLY_DATA_SECTION_ASM_OP): Remove.
	(ASM_OUTPUT_CASE_LABEL): Remove.
	(NO_DOLLAR_IN_LABEL): Undefine.

Patch was bootstrapped and regression tested on alphaev68-pc-linux-gnu.

OK for mainline?

Uros.