* target.h (asm_out.file_start, file_start_app_off,
	file_start_file_directive): New hooks.
	* target-def.h (TARGET_ASM_FILE_START_FILE_DIRECTIVE,
	TARGET_ASM_FILE_START_APP_OFF, TARGET_ASM_FILE_START):
	New hook-definition macros.
	* doc/tm.texi: Document new hooks; remove docs of ASM_FILE_START.
	* varasm.c (default_file_start): New.
	* output.h: Prototype it.
	* toplev.c (init_asm_output): Use targetm.asm_out.file_start.
	* system.h: Poison ASM_FILE_START.

	* config/alpha/alpha.c (alpha_write_verstamp): Delete.
	(alpha_file_start): New, define if !TARGET_ABI_UNICOSMK.
	(unicosmk_asm_file_start): Rename unicosmk_file_start,
	make static, take no arguments.
	(TARGET_ASM_FILE_START, TARGET_ASM_FILE_END,
	TARGET_ASM_FILE_START_FILE_DIRECTIVE): Set as appropriate.
	* config/alpha/unicosmk.h: Don't define ASM_FILE_START nor
	TARGET_ASM_FILE_END.  Remove reference to ASM_FILE_START in
	comment.
	* config/arc/arc.c (arc_asm_file_start): Rename
	arc_file_start, take no arguments, make static.
	(TARGET_ASM_FILE_START): Set it.
	* config/arm/arm.c (aof_file_start): New static function.
	(TARGET_ASM_FILE_START): Set it, when appropriate.
	* config/arm/coff.h, config/arm/elf.h:
	Set TARGET_ASM_FILE_START_APP_OFF to true.
	* config/avr/avr.c (asm_file_start): Rename avr_file_start,
	take no arguments, make static.
	(TARGET_ASM_FILE_START, TARGET_ASM_FILE_START_FILE_DIRECTIVE):
	Set them.
	* config/c4x/c4x.c (c4x_file_start): New static function.
	(TARGET_ASM_FILE_START, TARGET_ASM_FILE_START_FILE_DIRECTIVE):
	Set them.
	* config/cris/cris.c (cris_file_start): New static function.
	(TARGET_ASM_FILE_START): Set it.
	* config/dsp16xx/dsp16xx.c (coff_dsp16xx_file_start): Rename
	dsp16xx_file_start, make static.
	(luxworks_dsp16xx_file_start): Delete.
	(TARGET_ASM_FILE_START): Set it.
	* config/h8300/h8300.c (asm_file_start): Rename
	h8300_file_start, make static, take no arguments.
	(TARGET_ASM_FILE_START): Set it.
	* config/i370/i370.c (i370_file_start): New static function.
	(TARGET_ASM_FILE_START): Set it.
	* config/i386/i386.c (x86_file_start): New static function.
	(TARGET_ASM_FILE_START): Set it.
	* config/i386/i386.h (X86_FILE_START_VERSION_DIRECTIVE,
	X86_FILE_START_FLTUSED): New macros, default to false.
	* config/i386/i386-interix.h: Override X86_FILE_START_FLTUSED to 1.
	* config/i386/sysv4.h, config/i386/sco5.h: Override
	X86_FILE_START_VERSION_DIRECTIVE to true.
	* config/ia64/ia64.c (ia64_file_start): New static function.
	(TARGET_ASM_FILE_START): Set it.
	(emit_safe_across_calls): Take no arguments.
	* config/ia64/ia64.md: Update to match.
	* config/m32r/m32r.c (m32r_asm_file_start): Rename
	m32r_file_start, make static, take no arguments.
	(TARGET_ASM_FILE_START): Set it.
	* config/m68hc11/m68hc11.c (m68hc11_asm_file_start): Rename
	m68hc11_file_start, make static, take no arguments.
	(TARGET_ASM_FILE_START, TARGET_ASM_FILE_START_FILE_DIRECTIVE): Set.
	(print_options): Delete.
	* config/m68k/m68k.c (m68k_hp320_file_start): New static function.
	(TARGET_ASM_FILE_START_APP_OFF): Set.
	* config/m68k/hp320.h: Set TARGET_ASM_FILE_START to
	m68k_hp320_file_start.
	* config/mips/mips.c (iris6_asm_file_start, mips_asm_file_start):
	Make static, take no arguments.
	(TARGET_ASM_FILE_START, TARGET_ASM_FILE_START_FILE_DIRECTIVE): Set.
	* config/mmix/mmix.c (mmix_asm_file_start): Rename
	mmix_file_start, make static, take no arguments.
	(TARGET_ASM_FILE_START, TARGET_ASM_FILE_START_FILE_DIRECTIVE): Set.
	* config/mn10300/mn10300.c (asm_file_start): Rename
	mn10300_file_start, make static, take no arguments.
	(TARGET_ASM_FILE_START, TARGET_ASM_FILE_START_FILE_DIRECTIVE): Set.
	* config/ns32k/ns32k.c (TARGET_ASM_FILE_START_APP_OFF): Set.
	* config/pa/pa.c (pa_file_start_level, pa_file_start_space,
	pa_file_start_file, pa_file_start_mcount, pa_elf_file_start,
	pa_som_file_start, pa_linux_file_start, pa_hpux64_gas_file_start,
	pa_hpux64_hpas_file_start): New static functions.
	* config/pa/elf.h: Set TARGET_ASM_FILE_START to pa_elf_file_start.
	* config/pa/pa-linux.h: Set TARGET_ASM_FILE_START to
	pa_linux_file_start.
	* config/pa/pa64-hpux.h: Set TARGET_ASM_FILE_START to
	pa_hpux64_gas_file_start or pa_hpux64_hpas_file_start, as
	appropriate.
	* config/pa/som.h: Set TARGET_ASM_FILE_START to pa_som_file_start.
	* config/rs6000/rs6000.c: Include xcoffout.h when TARGET_XCOFF.
	(rs6000_file_start): Make static, take no arguments.  Reset
	default_cpu under certain conditions.
	(rs6000_xcoff_file_start): New function.
	* config/rs6000/rs6000.h (TARGET_ASM_FILE_START): Set.
	* config/rs6000/xcoff.h (TARGET_ASM_FILE_START,
	TARGET_ASM_FILE_START_FILE_DIRECTIVE): Override.
	* config/sh/sh.c (output_file_start): Rename
	sh_file_start, make static, take no arguments.  Merge in old
	code from sh/elf.h's ASM_FILE_START, conditioned on TARGET_ELF.
	(TARGET_ASM_FILE_START, TARGET_ASM_FILE_START_FILE_DIRECTIVE): Set.
	* config/sh/sh.c (TARGET_ELF): Define to 0.
	* config/sh/elf.h (TARGET_ELF): Redefine to 1.
	* config/v850/v850.c (asm_file_start): Delete.
	(TARGET_ASM_FILE_START_FILE_DIRECTIVE): Set.
	* config/vax/vax.c (vax_file_start): New static function.
	(TARGET_ASM_FILE_START, TARGET_ASM_FILE_START_APP_OFF): Set.

	* config/darwin.h: Override ASM_FILE_START_FILE_DIRECTIVE to false.
	* config/elfos.h, config/svr3.h, config/arm/elf.h, config/arm/pe.h
	* config/i386/att.h, config/i386/gas.h, config/i386/linux.h
	* config/i386/sysv4.h, config/i386/sco5.h, config/i960/i960-coff.h
	* config/m68k/coff.h, config/m68k/hp320.h, config/mcore/mcore-pe.h
	* config/vax/vaxv.h: Set ASM_FILE_START_FILE_DIRECTIVE to true.

	* config/darwin.h, config/elfos.h, config/alpha/elf.h
	* config/alpha/openbsd.h, config/alpha/osf.h, config/alpha/vms.h
	* config/arc/arc.h, config/arm/aof.h, config/arm/aout.h
	* config/arm/coff.h, config/arm/elf.h, config/arm/pe.h
	* config/avr/avr.h, config/c4x/c4x.h, config/cris/cris.h
	* config/dsp16xx/dsp16xx.h, config/h8300/elf.h, config/h8300/h8300.h
	* config/i370/i370.h, config/i386/att.h, config/i386/gas.h
	* config/i386/i386-interix.h, config/i386/linux.h, config/i386/sysv4.h
	* config/i386/sco5.h, config/i960/i960-coff.h, config/i960/i960.h
	* config/ia64/ia64.h, config/ia64/sysv4.h, config/m32r/m32r.h
	* config/m68hc11/m68hc11.h, config/m68k/coff.h, config/m68k/m68k.h
	* config/mcore/mcore-pe.h, config/mips/iris6.h, config/mips/mips.h
	* config/mmix/mmix.h, config/mn10300/mn10300.h, config/ns32k/ns32k.h
	* config/pa/elf.h, config/pa/pa-linux.h, config/pa/pa64-hpux.h
	* config/pa/som.h, config/pdp11/pdp11.h, config/rs6000/linux64.h
	* config/rs6000/lynx.h, config/rs6000/xcoff.h, config/sh/elf.h
	* config/sh/sh.h, config/sparc/sparc.h, config/v850/v850.h
	* config/vax/vax.h, config/vax/vaxv.h: Don't (re)define ASM_FILE_START.

	* config/alpha/alpha-protos.h, config/arc/arc-protos.h
	* config/avr/avr-protos.h, config/dsp16xx/dsp16xx-protos.h
	* config/h8300/h8300-protos.h, config/ia64/ia64-protos.h
	* config/m32r/m32r-protos.h, config/m68hc11/m68hc11-protos.h
	* config/mips/mips-protos.h, config/mmix/mmix-protos.h
	* config/mn10300/mn10300-protos.h, config/rs6000/rs6000-protos.h
	* config/sh/sh-protos.h, config/v850/v850-protos.h: Update.

	* xcoffout.h, config/rs6000/aix.h, config/rs6000/xcoff.h:
	Remove reference to ASM_FILE_START in comment.
	* config/arm/aof.h, config/arm/aout.h, config/arm/freebsd.h
	* config/arm/linux-gas.h, config/arm/netbsd-elf.h
	* config/arm/netbsd.h: Delete definition of ARM_OS_NAME.

From-SVN: r68229