Replace hardwired target-is-async check

This commit replaces a hardwired target-is-async check.

gdb/gdbserver/
2014-08-06  Gary Benson  <gbenson@redhat.com>

	* linux-low.c (linux_supports_non_stop): Use target_is_async_p.
Remove duplicated include file

File x86-linux-nat.h is included twice in amd64-linux-nat.c and
i386-linux-nat.c.  This patch is to remove one.

gdb:

2014-08-06  Yao Qi  <yao@codesourcery.com>

	* amd64-linux-nat.c: Remove duplicated include
	"x86-linux-nat.h".
	* i386-linux-nat.c: Likewise.
Rearrange awkwardly-nested conditionals

gdbserver's init_register_cache has some preprocessor conditionals
awkwardly nested around an if..else block.  This commit moves the
conditionals inside the braces to make the code more readable.

gdb/gdbserver/
2014-08-06  Gary Benson  <gbenson@redhat.com>

	* regcache.c (init_register_cache): Move conditionals inside if.
Modify new gold test to pass on powerpc64le

	* testsuite/defsym_test.sh: Allow ppc64le localentry annotation.
Add -momit_lock_prefix=[no|yes] option

This option serves as a workaround for processors, which fail on lock
prefix.

gas/
	* config/tc-i386.c (omit_lock_prefix): New.
	(output_insn): Omit lock prefix if omit_lock_prefix is true.
	(OPTION_omit_lock_prefix): New.
	(md_longopts): Add momit-lock-prefix.
	(md_parse_option): Handle momit-lock-prefix.
	(md_show_usage): Add momit-lock-prefix=[no|yes].
	* doc/c-i386.texi (momit-lock-prefix): Document.

gas/testsuite/

	* gas/i386/i386.exp: Run new tests.
	* gas/i386/omit-lock-no.d: New.
	* gas/i386/omit-lock-yes.d: Ditto.
	* gas/i386/omit-lock.s: Ditto.
Rename variable with confusing name

I saw this gem of not so legible code in solib-svr4.c (scan_dyntag):

	if (dyn_tag == dyntag)

and thought it deserved a small rename.

This just renames variables to be a bit more clear for those who read the
code. I also constified the parameter because, why not. The same was
done in scan_dyntag_auxv as well.

Tested only by rebuilding, since the change was done mechanically.

gdb/Changelog:

2014-08-01  Simon Marchi  <simon.marchi@ericsson.com>

	* solib-svr4.c (scan_dyntag): Rename dyntag and dyn_tag variables.
	(scan_dyntag_auxv): Same.
daily update
Merge WARN and CWARN cases in _bfd_generic_link_add_one_symbol

WARN has always been able to be handled by the CWARN case (WARN was
used when the previous symbols was undef, undefweak or common and thus
must be on the undefs list, so the CWARN test passes).  So let's merge
those two cases.

	* linker.c (WARN, CWARN): Collapse these states to WARN.
	(_bfd_generic_link_add_one_symbol): Use old CWARN case for
	new WARN.
missing changelog for last commit
Don't issue a warning for references in LTO IR to warning symbols

bfd/
	PR ld/16746
	* linker.c (_bfd_generic_link_add_one_symbol): Don't issue a
	warning for references in LTO IR to warning symbols.

ld/testsuite/
	PR ld/16746
	* ld-plugin/lto.exp: Add 4 tests for PR ld/16746.
	* ld-plugin/pr16746a.c: New file.
	* ld-plugin/pr16746b.c: Likewise.
	* ld-plugin/pr16746c.c: Likewise.
	* ld-plugin/pr16746d.c: Likewise.