Alan Modra bd6c6e2b80 PR ld/10406
* elf32-ppc.c (ppc_elf_howto_raw): Make R_PPC_EMB_SDAI16 and
	R_PPC_EMB_SDA2I16 complain_overflow_signed.
	(create_sdata_sym): Pass info rather than htab.
	Update all callers.  Ensure symbols are hidden.
	(ppc_elf_check_relocs): Allow SDAREL16 when shared.
	(ppc_elf_size_dynamic_sections): When shared, equate _SDA_BASE_ to
	_GLOBAL_OFFSET_TABLE_.
	(elf_finish_pointer_linker_section): Don't assume that sdata base
	symbol is always at 0x8000 offset.  Don't subtract the addend here.
	(is_static_defined): New function.
	(ppc_elf_relocate_section): Verify symbol base used in SDA relocs
	is statically defined.  Clear addend for EMB_SDAI16 and EMB_SDA2I16
	relocs.  Downgrade error on unexpected section for EMB_SDA2REL
	reloc symbols to a warning.
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BFD is an object file library.  It permits applications to use the
same routines to process object files regardless of their format.

BFD is used by the GNU debugger, assembler, linker, and the binary
utilities.

The documentation on using BFD is scanty and may be occasionally
incorrect.  Pointers to documentation problems, or an entirely
rewritten manual, would be appreciated.

There is some BFD internals documentation in doc/bfdint.texi which may
help programmers who want to modify BFD.

BFD is normally built as part of another package.  See the build
instructions for that package, probably in a README file in the
appropriate directory.

BFD supports the following configure options:

  --target=TARGET
	The default target for which to build the library.  TARGET is
	a configuration target triplet, such as sparc-sun-solaris.
  --enable-targets=TARGET,TARGET,TARGET...
	Additional targets the library should support.  To include
	support for all known targets, use --enable-targets=all.
  --enable-64-bit-bfd
	Include support for 64 bit targets.  This is automatically
	turned on if you explicitly request a 64 bit target, but not
	for --enable-targets=all.  This requires a compiler with a 64
	bit integer type, such as gcc.
  --enable-shared
	Build BFD as a shared library.
  --with-mmap
	Use mmap when accessing files.  This is faster on some hosts,
	but slower on others.  It may not work on all hosts.

Report bugs with BFD to bug-binutils@gnu.org.

Patches are encouraged.  When sending patches, always send the output
of diff -u or diff -c from the original file to the new file.  Do not
send default diff output.  Do not make the diff from the new file to
the original file.  Remember that any patch must not break other
systems.  Remember that BFD must support cross compilation from any
host to any target, so patches which use ``#ifdef HOST'' are not
acceptable.  Please also read the ``Reporting Bugs'' section of the
gcc manual.

Bug reports without patches will be remembered, but they may never get
fixed until somebody volunteers to fix them.