Sync top-level configure.ac with binutils-gdb

	Sync with binutils-gdb:
	2015-10-21  Nick Clifton  <nickc@redhat.com>

	PR gas/19109
	* configure.ac: Note the 'none' is an acceptable argument to
	--enable-compressed-debug-sections.
	* configure: Regenerate.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@232279 138bc75d-0d04-0410-961f-82ee72b054a4

ChangeLog

@@ -1,3 +1,13 @@
+2016-01-12  H.J. Lu  <hongjiu.lu@intel.com>
+
+	Sync with binutils-gdb:
+	2015-10-21  Nick Clifton  <nickc@redhat.com>
+
+	PR gas/19109
+	* configure.ac: Note the 'none' is an acceptable argument to
+	--enable-compressed-debug-sections.
+	* configure: Regenerate.
+
 2016-01-12  Bernd Edlinger  <bernd.edlinger@hotmail.de>
 
 	PR bootstrap/69134

configure

@@ -1477,7 +1477,7 @@ Optional Features:
                           offload target compiler during the build
   --enable-gold[=ARG]     build gold [ARG={default,yes,no}]
   --enable-ld[=ARG]       build ld [ARG={default,yes,no}]
-  --enable-compressed-debug-sections={all,gas,gold,ld}
+  --enable-compressed-debug-sections={all,gas,gold,ld,none}
                           Enable compressed debug sections for gas, gold or ld
                           by default
   --disable-libquadmath   do not build libquadmath directory

configure.ac

@@ -397,7 +397,7 @@ esac
 # Decide the default method for compressing debug sections.
 # Provide a configure time option to override our default.
 AC_ARG_ENABLE(compressed_debug_sections,
-[AS_HELP_STRING([--enable-compressed-debug-sections={all,gas,gold,ld}],
+[AS_HELP_STRING([--enable-compressed-debug-sections={all,gas,gold,ld,none}],
 		[Enable compressed debug sections for gas, gold or ld by
 		 default])],
 [