Making the code (hopefully) usable in 21.0.X again (AtlasCMake-00-01-70-01)

	* Disabled -Wl,--no-undefined for 21.0.X in this branch tag.
	* Tagging as AtlasCMake-00-01-70-01

2016-08-23 Attila Krasznahorkay <Attila.Krasznahorkay@cern.ch>
	* Fixing the issue described in ATLINFR-1240 with the setup
	  of the CALIBPATH environment variable in ZSH. As it turns out,
	  the cause of this was something that I'd label as a ZSH bug.
	* Tagging as AtlasCMake-00-01-70

2016-08-19 Attila Krasznahorkay <Attila.Krasznahorkay@cern.ch>
	* Re-enabling the -Wl,--no-undefined flag, to be used in
	  the CMAKE nightly.
	* Tagging as AtlasCMake-00-01-69

Build/AtlasCMake/modules/AtlasCompilerSettings.cmake

 # Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
 
-# $Id: AtlasCompilerSettings.cmake 766879 2016-08-08 09:10:26Z krasznaa $
+# $Id: AtlasCompilerSettings.cmake 776624 2016-10-05 12:49:54Z krasznaa $
 #
 # This file collects settings fine-tuning all the compiler and linker options
 # used in an ATLAS build in one place. It is included by default when using

Build/AtlasCMake/modules/scripts/setup.sh.in

-# $Id: setup.sh.in 740257 2016-04-14 12:22:22Z krasznaa $
+# $Id: setup.sh.in 769400 2016-08-23 08:33:18Z krasznaa $
 #
 # Script providing a functional build and runtime environment for project
 # @CMAKE_PROJECT_NAME@ when sourced from either BASH or ZSH.
@@ -47,7 +47,7 @@ remove_duplicates() {
             # Decide whether to add it to the environment or not:
             case ${envval}: in
                 *:"$x":*) ;;
-                *) eval "${envname}=\$$envname:$x";;
+                *) eval "${envname}=${envval}:$x";;
             esac
         fi
         # Or if it begins with "http"...
@@ -57,7 +57,7 @@ remove_duplicates() {
             # Decide whether to add it to the environment or not:
             case ${envval}: in
                 *:"$x":*) ;;
-                *) eval "${envname}=\$$envname:$x";;
+                *) eval "${envname}=${envval}:$x";;
             esac
         fi
         # Remove the element from the list: