Alan Modra wrote:
> I've been playing with ideas for SPU dynamic libraries.  One oddity is
> that we don't want the dynamic sections loaded, since relocation
> processing and symbol resolution will likely be done by the PPU, or at
> least will happen on an image in PPU memory.  NON_ALLOC_DYN puts all
> the dynamic sections in a different place.
> 
> NO_REL*_RELOCS cuts down on unnecessary linker script statements.
> Since that is a generally useful little optimisation, I'm committing
> it now, before the SPU dynamic support is ready.  I haven't enabled
> this for all ELF targets, only those that use elf.sc and have no hint
> that they might support both REL and RELA relocs.
> 
> 	* scripttempl/elf.sc (NO_REL_RELOCS, NO_RELA_RELOCS, NON_ALLOC_DYN): 
> 	Handle these defines.
> 	* emulparams/criself.sh, * emulparams/crislinux.sh,
> 	* emulparams/elf32am33lin.sh, * emulparams/elf32fr30.sh,
> 	* emulparams/elf32_i860.sh, * emulparams/elf32ip2k.sh,
> 	* emulparams/elf32mcore.sh, * emulparams/elf32ppccommon.sh,
> 	* emulparams/elf32ppcwindiss.sh, * emulparams/elf32_sparc.sh,
> 	* emulparams/elf32_spu.sh, * emulparams/elf32vax.sh,
> 	* emulparams/elf64alpha.sh, * emulparams/elf64mmix.sh,
> 	* emulparams/elf64ppc.sh, * emulparams/elf64_s390.sh,
> 	* emulparams/elf64_sparc.sh, * emulparams/elf_s390.sh,
> 	* emulparams/elf_x86_64.sh, * emulparams/h8300elf.sh,
> 	* emulparams/hppa64linux.sh, * emulparams/hppalinux.sh,
> 	* emulparams/m68kelf.sh, * emulparams/mn10200.sh,
> 	* emulparams/pjelf.sh, * emulparams/ppclynx.sh,
> 	* emulparams/shelf32.sh, * emulparams/shelf_nto.sh,
> 	* emulparams/shelf.sh, * emulparams/shelf_vxworks.sh,
> 	* emulparams/shlelf32_linux.sh, * emulparams/shlelf_linux.sh,
> 	* emulparams/shlelf_nto.sh (NO_REL_RELOCS): Set.
> 	* emulparams/arcelf.sh, * emulparams/elf32_i960.sh,
> 	* emulparams/elf32openrisc.sh, * emulparams/elf_i386_be.sh,
> 	* emulparams/elf_i386_ldso.sh, * emulparams/elf_i386.sh,
> 	* emulparams/elf_i386_vxworks.sh, * emulparams/i386lynx.sh,
> 	* emulparams/i386moss.sh, * emulparams/i386nto.sh,
> 	* emulparams/or32elf.sh, * emulparams/scoreelf.sh (NO_RELA_RELOCS): Set.

I've committed the following patch to put this into the elfxtensa.sc scripts.

2008-11-03  Bob Wilson  <bob.wilson@acm.org>

	* emulparams/elf32xtensa.sh (NO_REL_RELOCS): Set.
	* scripttempl/elfxtensa.sc (NO_REL_RELOCS, NO_RELA_RELOCS)
	(NON_ALLOC_DYN): Import changes from elf.sc.