diff --git a/configure/CONFIG.CrossCommon b/configure/CONFIG.CrossCommon
index 2fa6460d7..65e62dfb1 100644
--- a/configure/CONFIG.CrossCommon
+++ b/configure/CONFIG.CrossCommon
@@ -17,14 +17,14 @@ BUILD_CLASS = CROSS
 #   ifdef CROSS    looks better than  ifeq ($(BUILD_CLASS),CROSS)
 CROSS = YES
 
-GNU_TARGET_INCLUDE_DIR = $(GNU_TARGET:%= $(GNU_DIR)/%/include)
-GNU_TARGET_LIB_DIR = $(GNU_TARGET:%= $(GNU_DIR)/%/lib)
+GNU_TARGET_INCLUDE_DIR = $(wildcard $(GNU_TARGET:%=$(GNU_DIR)/%/include))
+GNU_TARGET_LIB_DIR = $(wildcard $(GNU_TARGET:%=$(GNU_DIR)/%/lib))
 
-CROSS_INCLUDES = $(addprefix -I,$(GNU_TARGET_INCLUDE_DIR))
-CROSS_LDFLAGS = $(addprefix -L,$(GNU_TARGET_LIB_DIR))
+CROSS_INCLUDES = $(GNU_TARGET_INCLUDE_DIR:%=-I%)
+CROSS_LDFLAGS = $(GNU_TARGET_LIB_DIR:%=-L%)
 
-CMPLR_PREFIX_CROSS=$(addsuffix -,$(GNU_TARGET))
-CMPLR_PREFIX=$(CMPLR_PREFIX_$(BUILD_CLASS))
+CMPLR_PREFIX_CROSS = $(addsuffix -,$(GNU_TARGET))
+CMPLR_PREFIX = $(CMPLR_PREFIX_$(BUILD_CLASS))
 
 # Cross builds usually use the gnu compiler
 include $(CONFIG)/CONFIG.gnuCommon
diff --git a/configure/CONFIG_SITE_ENV b/configure/CONFIG_SITE_ENV
index 2c56ff229..271fd7134 100644
--- a/configure/CONFIG_SITE_ENV
+++ b/configure/CONFIG_SITE_ENV
@@ -13,7 +13,7 @@
 #
 #	CONFIG_SITE_ENV - EPICS Environment Parameter Site configuration file
 #
-# This file is read by the script base/src/libCom/env/bldEnvdata.pl
+# This file is read by the script base/src/libCom/env/bldEnvData.pl
 # Variable definitions must take the form
 #	VAR = VALUE
 # or
@@ -26,31 +26,46 @@
 
 # Time service:
 # EPICS_TIMEZONE
-#	local timezone info for vxWorks and RTEMS IOCs.  The format is
+#	Local timezone info for vxWorks and RTEMS.  The format is
 #	    <name>::<minutesWest>:<start daylight>:<end daylight>
 #	where the start and end are mmddhh - that is month,day,hour
-#	e.g. for ANL in 2016: EPICS_TIMEZONE=CST/CDT::360:031302:110602
+#	e.g. for ANL in 2018: EPICS_TIMEZONE=CUS::360:031102:110402
+#	The future dates below assume the rules don't get changed;
+#	see http://www.timeanddate.com/time/dst/2018.html to check.
 #
-#	DST for 2016  US: Mar 13 - Nov 06
-#	              EU: Mar 27 - Oct 30
 #	DST for 2017  US: Mar 12 - Nov 05
 #	              EU: Mar 26 - Oct 29
+EPICS_TIMEZONE = CUS::360:031202:110502
+#EPICS_TIMEZONE = MET::-60:032602:102902
+#
 #	DST for 2018  US: Mar 11 - Nov 04
 #	              EU: Mar 25 - Oct 28
+#EPICS_TIMEZONE = CUS::360:031102:110402
+#EPICS_TIMEZONE = MET::-60:032502:102802
+#
 #	DST for 2019  US: Mar 10 - Nov 03
 #	              EU: Mar 31 - Oct 27
+#EPICS_TIMEZONE = CUS::360:031002:110302
+#EPICS_TIMEZONE = MET::-60:033102:102702
+#
 #	DST for 2020  US: Mar 08 - Nov 01
 #	              EU: Mar 29 - Oct 25
+#EPICS_TIMEZONE = CUS::360:030802:110102
+#EPICS_TIMEZONE = MET::-60:032902:102502
+#
 #	DST for 2021  US: Mar 14 - Nov 07
 #	              EU: Mar 28 - Oct 31
-#	(see: http://www.timeanddate.com/time/dst/2016.html etc. )
+#EPICS_TIMEZONE = CUS::360:031402:110702
+#EPICS_TIMEZONE = MET::-60:032802:103102
 #
-# These values are for 2016:
-EPICS_TIMEZONE=CST/CDT::360:031302:110602
-#EPICS_TIMEZONE=CET/CEST::-60:032702:103002
+#	DST for 2022  US: Mar 13 - Nov 06
+#	              EU: Mar 27 - Oct 30
+#EPICS_TIMEZONE = CUS::360:031302:110602
+#EPICS_TIMEZONE = MET::-60:032702:103002
 
 # EPICS_TS_NTP_INET
-#	NTP time server ip address.  Uses boot host if not set.
+#	NTP time server ip address for VxWorks and RTEMS.
+#	IOC will use its boot host if this is not set.
 EPICS_TS_NTP_INET=
 
 # IOC Shell:
diff --git a/configure/os/CONFIG.Common.linux-xscale_be b/configure/os/CONFIG.Common.linux-xscale_be
index 8597aa208..462320f66 100644
--- a/configure/os/CONFIG.Common.linux-xscale_be
+++ b/configure/os/CONFIG.Common.linux-xscale_be
@@ -15,5 +15,14 @@ ARCH_CLASS = xscale
 ifeq ($(BUILD_CLASS),CROSS)
     VALID_BUILDS = Ioc
     GNU_TARGET = xscale_be
-    CMPLR_PREFIX = $(addsuffix -,$(GNU_TARGET))
+    CMPLR_PREFIX = $(GNU_TARGET:%=%-)
+
+    # Configure for readline if requested
+    OP_SYS_INCLUDES += $(READLINE_DIR:%=-I%/include)
+    READLINE_LDFLAGS = $(READLINE_DIR:%=-L%/lib)
+    RUNTIME_LDFLAGS_READLINE_YES_NO = $(READLINE_DIR:%=-Wl,-rpath,%/lib)
+    RUNTIME_LDFLAGS += \
+        $(RUNTIME_LDFLAGS_READLINE_$(LINKER_USE_RPATH)_$(STATIC_BUILD))
+    SHRLIBDIR_LDFLAGS += $(READLINE_LDFLAGS)
+    PRODDIR_LDFLAGS += $(READLINE_LDFLAGS)
 endif
diff --git a/configure/os/CONFIG.Common.linuxCommon b/configure/os/CONFIG.Common.linuxCommon
index d50ce60d9..965de09b8 100644
--- a/configure/os/CONFIG.Common.linuxCommon
+++ b/configure/os/CONFIG.Common.linuxCommon
@@ -23,13 +23,15 @@ STATIC_LDFLAGS_YES= -Wl,-Bstatic
 STATIC_LDFLAGS_NO=
 STATIC_LDLIBS_YES= -Wl,-Bdynamic
 
-# Set runtime path for shared libraries
-SHRLIBDIR_RPATH_LDFLAGS_YES += $(SHRLIB_DEPLIB_DIRS:%=-Wl,-rpath,%)
-SHRLIBDIR_LDFLAGS += $(SHRLIBDIR_RPATH_LDFLAGS_$(LINKER_USE_RPATH))
+# Set runtime path for shared libraries if USE_RPATH=YES and STATIC_BUILD=NO
+SHRLIBDIR_RPATH_LDFLAGS_YES_NO = $(SHRLIB_DEPLIB_DIRS:%=-Wl,-rpath,%)
+SHRLIBDIR_LDFLAGS += \
+    $(SHRLIBDIR_RPATH_LDFLAGS_$(LINKER_USE_RPATH)_$(STATIC_BUILD))
 
-# Set runtime path for products
-PRODDIR_RPATH_LDFLAGS_YES += $(PROD_DEPLIB_DIRS:%=-Wl,-rpath,%)
-PRODDIR_LDFLAGS += $(PRODDIR_RPATH_LDFLAGS_$(LINKER_USE_RPATH))
+# Set runtime path for products if USE_RPATH=YES and STATIC_BUILD=NO
+PRODDIR_RPATH_LDFLAGS_YES_NO = $(PROD_DEPLIB_DIRS:%=-Wl,-rpath,%)
+PRODDIR_LDFLAGS += \
+    $(PRODDIR_RPATH_LDFLAGS_$(LINKER_USE_RPATH)_$(STATIC_BUILD))
 
 # Link libraries controlled by COMMANDLINE_LIBRARY
 # The newest Linux versions only need readline, older ones need both
diff --git a/configure/os/CONFIG.Common.vxWorksCommon b/configure/os/CONFIG.Common.vxWorksCommon
index 3952fa970..875fe81b7 100644
--- a/configure/os/CONFIG.Common.vxWorksCommon
+++ b/configure/os/CONFIG.Common.vxWorksCommon
@@ -106,20 +106,10 @@ GNU_DIR_6 = $(WIND_BASE)/gnu/$(VX_GNU_VERSION)-vxworks-$(VXWORKS_VERSION)/$(WIND
 GNU_DIR = $(GNU_DIR_$(VXWORKS_MAJOR_VERSION))
 
 #--------------------------------------------------
-# Wind River moved nm out of GNU_BIN in some versions
+# This finds nm on any supported VxWorks version
 
-WORKBENCH_BIN = $(WIND_BASE)/workbench-$(WORKBENCH_VERSION)/$(WIND_HOST_TYPE)/bin
-UTILITIES_BIN = $(WIND_BASE)/utilities-$(UTILITIES_VERSION)/$(WIND_HOST_TYPE)/bin
-
-NM_DIR_6.4 = $(WORKBENCH_BIN)
-NM_DIR_6.5 = $(WORKBENCH_BIN)
-NM_DIR_6.6 = $(WORKBENCH_BIN)
-NM_DIR_6.7 = $(GNU_BIN)
-NM_DIR_6.8 = $(UTILITIES_BIN)
-NM_DIR_6.9 = $(UTILITIES_BIN)
-NM_DIR = $(firstword $(NM_DIR_$(VXWORKS_VERSION)) $(GNU_BIN))
-
-NM = $(NM_DIR)/$(CMPLR_PREFIX)nm$(CMPLR_SUFFIX)$(HOSTEXE)
+NMPROG = $(CMPLR_PREFIX)nm$(CMPLR_SUFFIX)$(HOSTEXE)
+NM = $(firstword $(wildcard $(WIND_BASE)/*/$(WIND_HOST_TYPE)/bin/$(NMPROG)))
 
 #--------------------------------------------------
 # A linker script is essential for munching from vxWorks 6.6 onwards
@@ -132,6 +122,7 @@ MUNCH_LDFLAGS = $(MUNCH_LDFLAGS_$(VXWORKS_MAJOR_VERSION))
 #--------------------------------------------------
 # These are required by some of the Wind River tools
 export WIND_BASE
+export WIND_HOME = $(WIND_BASE)
 export WIND_HOST_TYPE
 export TOOL_FAMILY = GNU
 
@@ -179,6 +170,8 @@ OSITHREAD_USE_DEFAULT_STACK = NO
 
 #--------------------------------------------------
 # Link definitions
+CROSS_LDFLAGS =
+#
 LINK.cpp = $(LD) -o $@ $(STATIC_LDFLAGS) $(PRODDIR_LDFLAGS) $(LDFLAGS)
 LINK.cpp += $(PROD_LDFLAGS) $(PROD_LD_OBJS) $(PROD_LD_RESS) $(PROD_LDLIBS)
 
diff --git a/configure/os/CONFIG.linux-x86.linux-arm b/configure/os/CONFIG.linux-x86.linux-arm
index e2cf36a52..63bd5d8be 100644
--- a/configure/os/CONFIG.linux-x86.linux-arm
+++ b/configure/os/CONFIG.linux-x86.linux-arm
@@ -11,19 +11,14 @@ GNU_TARGET = arm-linux
 CMPLR_SUFFIX =
 CMPLR_PREFIX = $(addsuffix -,$(GNU_TARGET))
 
-# Provide a link-time path for shared libraries
-SHRLIBDIR_RPATH_LDFLAGS_YES += $(SHRLIB_DEPLIB_DIRS:%=-Wl,-rpath-link,%)
-SHRLIBDIR_LDFLAGS += $(SHRLIBDIR_RPATH_LDFLAGS_$(LINKER_USE_RPATH))
-
-# Provide a link-time path for products
-PRODDIR_RPATH_LDFLAGS_YES += $(PROD_DEPLIB_DIRS:%=-Wl,-rpath-link,%)
-PRODDIR_LDFLAGS += $(PRODDIR_RPATH_LDFLAGS_$(LINKER_USE_RPATH))
-
-# Provide a link-time path for readline 
-RUNTIME_LDFLAGS_READLINE_YES = -Wl,-rpath-link,$(GNU_DIR)/lib
-RUNTIME_LDFLAGS_READLINE = $(RUNTIME_LDFLAGS_READLINE_$(LINKER_USE_RPATH))
-RUNTIME_LDFLAGS_READLINE_CURSES = $(RUNTIME_LDFLAGS_READLINE_$(LINKER_USE_RPATH))
-RUNTIME_LDFLAGS_READLINE_NCURSES = $(RUNTIME_LDFLAGS_READLINE_$(LINKER_USE_RPATH))
+# Provide a link-time path for readline if needed
+OP_SYS_INCLUDES += $(READLINE_DIR:%=-I%/include)
+READLINE_LDFLAGS = $(READLINE_DIR:%=-L%/lib)
+RUNTIME_LDFLAGS_READLINE_YES_NO = $(READLINE_DIR:%=-Wl,-rpath,%/lib)
+RUNTIME_LDFLAGS += \
+    $(RUNTIME_LDFLAGS_READLINE_$(LINKER_USE_RPATH)_$(STATIC_BUILD))
+SHRLIBDIR_LDFLAGS += $(READLINE_LDFLAGS)
+PRODDIR_LDFLAGS += $(READLINE_LDFLAGS)
 
 # Library flags
 STATIC_LDFLAGS_YES= -Wl,-Bstatic
diff --git a/configure/os/CONFIG_SITE.Common.linux-xscale_be b/configure/os/CONFIG_SITE.Common.linux-xscale_be
index 69efd6ffa..015229647 100644
--- a/configure/os/CONFIG_SITE.Common.linux-xscale_be
+++ b/configure/os/CONFIG_SITE.Common.linux-xscale_be
@@ -1,10 +1,4 @@
 # CONFIG_SITE.Common.linux-xscale_be
 #
-# Site specific definitions for linux-xscale_be target builds.
+# Site specific definitions for all linux-xscale_be target builds.
 #-------------------------------------------------------
-
-# Set GNU_DIR to point to directory containing the tool-chain
-
-# APS:
-GNU_DIR = /usr/local/vw/xscale_be
-
diff --git a/configure/os/CONFIG_SITE.Common.vxWorksCommon b/configure/os/CONFIG_SITE.Common.vxWorksCommon
index 993694350..38e63893f 100644
--- a/configure/os/CONFIG_SITE.Common.vxWorksCommon
+++ b/configure/os/CONFIG_SITE.Common.vxWorksCommon
@@ -9,7 +9,7 @@
 
 # Note: vxWorks 5.4.x (Tornado 2.0.x) is not supported
 
-VXWORKS_VERSION = 5.5
+#VXWORKS_VERSION = 5.5
 #VXWORKS_VERSION = 6.0
 #VXWORKS_VERSION = 6.1
 #VXWORKS_VERSION = 6.2
@@ -19,7 +19,7 @@ VXWORKS_VERSION = 5.5
 #VXWORKS_VERSION = 6.6
 #VXWORKS_VERSION = 6.7
 #VXWORKS_VERSION = 6.8
-#VXWORKS_VERSION = 6.9
+VXWORKS_VERSION = 6.9
 
 
 # Sites may override the following path for a particular host
@@ -29,19 +29,6 @@ VXWORKS_VERSION = 5.5
 # WIND_BASE is where you installed the Wind River software.
 # Under vxWorks 6.x this is *not* the same as the old VX_DIR setting
 
-WIND_BASE = /usr/local/vw/tornado22-$(ARCH_CLASS)
-#WIND_BASE = /usr/local/vw/vxWorks-$(VXWORKS_VERSION)
+#WIND_BASE = /usr/local/vw/tornado22-$(ARCH_CLASS)
+WIND_BASE = /usr/local/vw/vxWorks-$(VXWORKS_VERSION)
 #WIND_BASE = /ade/vxWorks/$(VXWORKS_VERSION)
-
-
-# WorkBench Version number, if you're using vxWorks 6.x
-
-#WORKBENCH_VERSION = 2.6
-#WORKBENCH_VERSION = 3.0
-#WORKBENCH_VERSION = 3.2
-#WORKBENCH_VERSION = 3.3
-
-
-# Utilities Version number, required from vxWorks 6.8 and later
-
-#UTILITIES_VERSION = 1.0
diff --git a/configure/os/CONFIG_SITE.linux-x86.linux-arm b/configure/os/CONFIG_SITE.linux-x86.linux-arm
index 1500c4526..a1edb423d 100644
--- a/configure/os/CONFIG_SITE.linux-x86.linux-arm
+++ b/configure/os/CONFIG_SITE.linux-x86.linux-arm
@@ -7,8 +7,25 @@
 GNU_TARGET = arm-xilinx-linux-gnueabi
 
 # Set GNU tools install path
-# This is the install path at APS:
+# Examples are installations at the APS:
 GNU_DIR = /usr/local/vw/zynq-2011.09
+#GNU_DIR = /usr/local/Xilinx/SDK/2016.3/gnu/arm/lin
+#GNU_DIR = /APSshare/XilinxSDK/2015.4/gnu/arm/lin
+
+# If cross-building shared libraries and the paths on the target machine are
+# different than on the build host, you should uncomment the lines below to
+# disable putting runtime library paths in products and shared libraries.
+# You will also need to provide another way for programs to find their shared
+# libraries at runtime, such as by setting LD_LIBRARY_PATH or by using
+# mechanisms related to /etc/ld.so.conf
+#SHRLIBDIR_RPATH_LDFLAGS_YES_NO =
+#PRODDIR_RPATH_LDFLAGS_YES_NO =
+# Note: It may be simpler to just set STATIC_BUILD=YES here and not
+# try to use shared libraries at all in these circumstances.
+
+# To use libreadline, point this to its install prefix
+#READLINE_DIR = $(GNU_DIR)
+#READLINE_DIR = /tools/cross/linux-x86.linux-arm/readline
+# See CONFIG_SITE.Common.linux-arm for other COMMANDLINE_LIBRARY values
+#COMMANDLINE_LIBRARY = READLINE
 
-# With a Xilinx SDK, it'll be something like
-#GNU_DIR = /usr/local/zynq/Xilinx/SDK/2015.4/gnu/arm/lin
diff --git a/configure/os/CONFIG_SITE.linux-x86.linux-xscale_be b/configure/os/CONFIG_SITE.linux-x86.linux-xscale_be
new file mode 100644
index 000000000..6df78db19
--- /dev/null
+++ b/configure/os/CONFIG_SITE.linux-x86.linux-xscale_be
@@ -0,0 +1,11 @@
+# CONFIG_SITE.linux-x86.linux-xscale_be
+#
+# Site specific definitions for linux-x86 host - linux-xscale_be targets
+#-------------------------------------------------------
+
+# Set GNU_DIR to point to directory containing the tool-chain
+GNU_DIR = /usr/local/vw/xscale_be
+
+# If readline is available, configure it
+READLINE_DIR = $(GNU_DIR)/target/usr
+COMMANDLINE_LIBRARY = READLINE
diff --git a/configure/os/CONFIG_SITE.linux-x86_64.linux-xscale_be b/configure/os/CONFIG_SITE.linux-x86_64.linux-xscale_be
new file mode 100644
index 000000000..d016ce985
--- /dev/null
+++ b/configure/os/CONFIG_SITE.linux-x86_64.linux-xscale_be
@@ -0,0 +1,7 @@
+# CONFIG_SITE.linux-x86_64.linux-xscale_be
+#
+# Site specific settings for linux-x86_64 host - linux-xscale_be target
+#-------------------------------------------------------
+
+# Inherit setting from linux-x86
+include $(CONFIG)/os/CONFIG_SITE.linux-x86.linux-xscale_be