* elflink.c (_bfd_elf_gc_mark_hook): New function.

	* elflink.c (_bfd_elf_gc_mark_hook): New function.
	* elf-bfd.h (_bfd_elf_gc_mark_hook): Declare.
	* elfxx-target.h (elf_backend_gc_mark_hook): Default to above.
	* elf-m10300.c (mn10300_elf_gc_mark_hook): Use _bfd_elf_gc_mark_hook.
	* elf32-arm.c (elf32_arm_gc_mark_hook): Likewise.
	* elf32-cris.c (cris_elf_gc_mark_hook): Likewise.
	* elf32-hppa.c (elf32_hppa_gc_mark_hook): Likewise.
	* elf32-i386.c (elf_i386_gc_mark_hook): Likewise.
	* elf32-m32r.c (m32r_elf_gc_mark_hook): Likewise.
	* elf32-m68k.c (elf_m68k_gc_mark_hook): Likewise.
	* elf32-mcore.c (mcore_elf_gc_mark_hook): Likewise.
	* elf32-ppc.c (ppc_elf_gc_mark_hook): Likewise.
	* elf32-s390.c (elf_s390_gc_mark_hook): Likewise.
	* elf32-score.c (_bfd_score_elf_gc_mark_hook): Likewise.
	* elf32-sh.c (sh_elf_gc_mark_hook): Likewise.
	* elf32-vax.c (elf_vax_gc_mark_hook): Likewise.
	* elf32-xtensa.c (elf_xtensa_gc_mark_hook): Likewise.
	* elf64-mmix.c (mmix_elf_gc_mark_hook): Likewise.
	* elf64-s390.c (elf_s390_gc_mark_hook): Likewise.
	* elf64-x86-64.c (elf64_x86_64_gc_mark_hook): Likewise.
	* elfxx-mips.c (_bfd_mips_elf_gc_mark_hook): Likewise.
	* elfxx-sparc.c (_bfd_sparc_elf_gc_mark_hook): Likewise.
	* elf32-bfin.c (bfin_gc_mark_hook): Likewise.
	(bfinfdpic_gc_sweep_hook): Delete.
	(elf_backend_gc_sweep_hook): Don't define for elf32-bfinfdpic.
	* elf32-d10v.c (elf32_d10v_gc_mark_hook): Use _bfd_elf_gc_mark_hook.
	(elf32_d10v_gc_sweep_hook): Delete.
	(elf_backend_gc_sweep_hook): Don't define.
	* elf32-fr30.c (fr30_elf_gc_mark_hook): Use _bfd_elf_gc_mark_hook.
	(fr30_elf_gc_sweep_hook): Delete.
	(elf_backend_gc_sweep_hook): Don't define.
	* elf32-frv.c (elf32_frv_gc_mark_hook): Use _bfd_elf_gc_mark_hook.
	(elf32_frv_gc_sweep_hook): Delete.
	(elf_backend_gc_sweep_hook): Don't define.
	* elf32-iq2000.c (iq2000_elf_gc_mark_hook): Use _bfd_elf_gc_mark_hook.
	(iq2000_elf_gc_sweep_hook): Delete.
	(elf_backend_gc_sweep_hook): Don't define.
	* elf32-openrisc.c (openrisc_elf_gc_mark_hook): Use
	_bfd_elf_gc_mark_hook.
	(openrisc_elf_gc_sweep_hook): Delete.
	(elf_backend_gc_sweep_hook): Don't define.
	* elf32-v850.c (v850_elf_gc_mark_hook): Use _bfd_elf_gc_mark_hook.
	(v850_elf_gc_sweep_hook): Delete.
	(elf_backend_gc_sweep_hook): Don't define.
	* elf32-xstormy16.c (xstormy16_elf_gc_mark_hook): Use
	_bfd_elf_gc_mark_hook.
	(xstormy16_elf_gc_sweep_hook): Delete.
	(elf_backend_gc_sweep_hook): Don't define.
	* elf64-sh64.c (sh_elf64_gc_mark_hook): Use _bfd_elf_gc_mark_hook.
	(sh_elf64_gc_sweep_hook): Delete.
	(elf_backend_gc_sweep_hook): Don't define.
	* elf32-avr.c (elf32_avr_gc_mark_hook): Delete.
	(elf32_avr_gc_sweep_hook): Delete.
	(elf_backend_gc_mark_hook, elf_backend_gc_mark_hook): Don't define.
	* elf32-cr16c.c (elf32_cr16c_gc_mark_hook): Delete.
	(elf32_cr16c_gc_sweep_hook): Delete.
	(elf_backend_gc_mark_hook, elf_backend_gc_mark_hook): Don't define.
	* elf32-crx.c (elf32_crx_gc_mark_hook): Delete.
	(elf32_crx_gc_sweep_hook): Delete.
	(elf_backend_gc_mark_hook, elf_backend_gc_mark_hook): Don't define.
	* elf32-h8300.c (elf32_h8_gc_mark_hook): Delete.
	(elf32_h8_gc_sweep_hook): Delete.
	(elf_backend_gc_mark_hook, elf_backend_gc_mark_hook): Don't define.
	* elf32-ip2k.c (ip2k_elf_gc_mark_hook): Delete.
	(ip2k_elf_gc_sweep_hook): Delete.
	(elf_backend_gc_mark_hook, elf_backend_gc_mark_hook): Don't define.
	* elf32-m32c.c (m32c_elf_gc_mark_hook, m32c_elf_gc_sweep_hook): Delete.
	(elf_backend_gc_mark_hook, elf_backend_gc_mark_hook): Don't define.
	* elf32-m68hc11.c (elf_backend_gc_mark_hook): Don't define.
	(elf_backend_gc_sweep_hook): Don't define.
	* elf32-m68hc12.c (elf_backend_gc_mark_hook): Don't define.
	(elf_backend_gc_sweep_hook): Don't define.
	* elf32-m68hc1x.c (elf32_m68hc11_gc_mark_hook): Delete.
	(elf32_m68hc11_gc_sweep_hook): Delete.
	* elf32-m68hc1x.h (elf32_m68hc11_gc_mark_hook): Delete.
	(elf32_m68hc11_gc_sweep_hook): Delete.
	* elf32-msp430.c (elf32_msp430_gc_mark_hook): Delete.
	(elf32_msp430_gc_sweep_hook): Delete.
	(elf_backend_gc_mark_hook, elf_backend_gc_mark_hook): Don't define.
	* elf32-mt.c (mt_elf_gc_mark_hook, mt_elf_gc_sweep_hook): Delete.
	(elf_backend_gc_mark_hook, elf_backend_gc_mark_hook): Don't define.