when configuring using --build=c++11 on Linux/gcc make sure that

-Wno-deprecated-declarations is set to silence warnings on auto_ptr
being deprecated.


git-svn-id: http://root.cern.ch/svn/root/trunk@44364 27541ba8-7e3a-0410-8455-c3a389f83636

config/root-config.in

@@ -447,7 +447,7 @@ freebsd* | openbsd* | linux*)
       fi
    done
    if echo $configargs | grep 'c++11' > /dev/null 2>& 1 ; then
-      auxcflags="-std=c++11 $auxcflags"
+      auxcflags="-std=c++11 -Wno-deprecated-declarations $auxcflags"
    fi
    ;;
 macosx*)