BIND 10 trac2198_4, updated. a7e6d2d9fa185995a78a9618e933a039e3614a64 [2198] Add Mutex::tryLock() and non-blocking variant of Mutex::Locker

BIND 10 source code commits bind10-changes at lists.isc.org
Tue Oct 30 03:19:55 UTC 2012


The branch, trac2198_4 has been updated
       via  a7e6d2d9fa185995a78a9618e933a039e3614a64 (commit)
       via  222d8b59e03583413bc009fda7828ff3078f270b (commit)
       via  bd0eb83599a9d86382f96943faf0dbe758133686 (commit)
      from  f708ced7e5a47bc22314cd6a2bac901e13152e9e (commit)

Those revisions listed above that are new to this repository have
not appeared on any other notification email; so we list those
revisions in full, below.

- Log -----------------------------------------------------------------
commit a7e6d2d9fa185995a78a9618e933a039e3614a64
Author: Mukund Sivaraman <muks at isc.org>
Date:   Tue Oct 30 08:49:14 2012 +0530

    [2198] Add Mutex::tryLock() and non-blocking variant of Mutex::Locker
    
    This is necessary for testing that a mutex was used in code.  I've
    also added comments to discourage the use of the lock methods
    directly and use the Mutex::Locker where applicable. The Mutex lock
    methods are currently private.

commit 222d8b59e03583413bc009fda7828ff3078f270b
Author: Mukund Sivaraman <muks at isc.org>
Date:   Mon Oct 22 05:08:45 2012 +0530

    [2198] Fix library paths to add lib/util/threads/ too (Mac OS test failure)

commit bd0eb83599a9d86382f96943faf0dbe758133686
Author: Mukund Sivaraman <muks at isc.org>
Date:   Mon Oct 22 05:03:19 2012 +0530

    [2198] Link -lpthread in libb10-threads target

-----------------------------------------------------------------------

Summary of changes:
 src/bin/bind10/run_bind10.sh.in                    |    2 +-
 src/bin/bind10/tests/Makefile.am                   |    2 +-
 src/bin/bindctl/run_bindctl.sh.in                  |    2 +-
 src/bin/bindctl/tests/Makefile.am                  |    2 +-
 src/bin/cfgmgr/plugins/tests/Makefile.am           |    2 +-
 src/bin/cfgmgr/tests/Makefile.am                   |    2 +-
 src/bin/cmdctl/run_b10-cmdctl.sh.in                |    2 +-
 src/bin/cmdctl/tests/Makefile.am                   |    2 +-
 src/bin/dbutil/run_dbutil.sh.in                    |    2 +-
 src/bin/ddns/tests/Makefile.am                     |    2 +-
 src/bin/dhcp4/tests/Makefile.am                    |    2 +-
 src/bin/dhcp6/tests/Makefile.am                    |    2 +-
 src/bin/loadzone/run_loadzone.sh.in                |    2 +-
 src/bin/loadzone/tests/correct/Makefile.am         |    2 +-
 src/bin/loadzone/tests/error/Makefile.am           |    2 +-
 src/bin/msgq/tests/Makefile.am                     |    2 +-
 src/bin/stats/tests/Makefile.am                    |    2 +-
 src/bin/tests/Makefile.am                          |    2 +-
 src/bin/xfrin/tests/Makefile.am                    |    2 +-
 src/bin/xfrout/tests/Makefile.am                   |    2 +-
 src/bin/zonemgr/tests/Makefile.am                  |    2 +-
 src/lib/dns/python/tests/Makefile.am               |    2 +-
 src/lib/python/isc/acl/tests/Makefile.am           |    2 +-
 src/lib/python/isc/bind10/tests/Makefile.am        |    2 +-
 src/lib/python/isc/cc/tests/Makefile.am            |    2 +-
 src/lib/python/isc/config/tests/Makefile.am        |    2 +-
 src/lib/python/isc/datasrc/tests/Makefile.am       |    2 +-
 src/lib/python/isc/ddns/tests/Makefile.am          |    2 +-
 src/lib/python/isc/log/tests/Makefile.am           |    2 +-
 src/lib/python/isc/net/tests/Makefile.am           |    2 +-
 src/lib/python/isc/notify/tests/Makefile.am        |    2 +-
 src/lib/python/isc/server_common/tests/Makefile.am |    2 +-
 src/lib/python/isc/sysinfo/tests/Makefile.am       |    2 +-
 src/lib/python/isc/util/cio/tests/Makefile.am      |    2 +-
 src/lib/python/isc/util/tests/Makefile.am          |    2 +-
 src/lib/python/isc/xfrin/tests/Makefile.am         |    2 +-
 src/lib/util/threads/Makefile.am                   |    3 +-
 src/lib/util/threads/sync.cc                       |   20 ++++++++
 src/lib/util/threads/sync.h                        |   54 ++++++++++++++++++--
 src/lib/util/threads/tests/lock_unittest.cc        |   38 ++++++++++++++
 tests/lettuce/setup_intree_bind10.sh.in            |    2 +-
 41 files changed, 146 insertions(+), 43 deletions(-)

-----------------------------------------------------------------------
diff --git a/src/bin/bind10/run_bind10.sh.in b/src/bin/bind10/run_bind10.sh.in
index 17d2c53..7c7db2c 100755
--- a/src/bin/bind10/run_bind10.sh.in
+++ b/src/bin/bind10/run_bind10.sh.in
@@ -30,7 +30,7 @@ export PYTHONPATH
 # required by loadable python modules.
 SET_ENV_LIBRARY_PATH=@SET_ENV_LIBRARY_PATH@
 if test $SET_ENV_LIBRARY_PATH = yes; then
-	@ENV_LIBRARY_PATH@=@abs_top_builddir@/src/lib/dns/.libs:@abs_top_builddir@/src/lib/dns/python/.libs:@abs_top_builddir@/src/lib/cryptolink/.libs:@abs_top_builddir@/src/lib/cc/.libs:@abs_top_builddir@/src/lib/config/.libs:@abs_top_builddir@/src/lib/log/.libs:@abs_top_builddir@/src/lib/acl/.libs:@abs_top_builddir@/src/lib/util/.libs:@abs_top_builddir@/src/lib/util/io/.libs:@abs_top_builddir@/src/lib/exceptions/.libs:@abs_top_builddir@/src/lib/datasrc/.libs:$@ENV_LIBRARY_PATH@
+	@ENV_LIBRARY_PATH@=@abs_top_builddir@/src/lib/dns/.libs:@abs_top_builddir@/src/lib/dns/python/.libs:@abs_top_builddir@/src/lib/cryptolink/.libs:@abs_top_builddir@/src/lib/cc/.libs:@abs_top_builddir@/src/lib/config/.libs:@abs_top_builddir@/src/lib/log/.libs:@abs_top_builddir@/src/lib/acl/.libs:@abs_top_builddir@/src/lib/util/.libs:@abs_top_builddir@/src/lib/util/threads/.libs:@abs_top_builddir@/src/lib/util/io/.libs:@abs_top_builddir@/src/lib/exceptions/.libs:@abs_top_builddir@/src/lib/datasrc/.libs:$@ENV_LIBRARY_PATH@
 	export @ENV_LIBRARY_PATH@
 fi
 
diff --git a/src/bin/bind10/tests/Makefile.am b/src/bin/bind10/tests/Makefile.am
index a5e3fab..63d2143 100644
--- a/src/bin/bind10/tests/Makefile.am
+++ b/src/bin/bind10/tests/Makefile.am
@@ -8,7 +8,7 @@ noinst_SCRIPTS = $(PYTESTS)
 # required by loadable python modules.
 LIBRARY_PATH_PLACEHOLDER =
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 endif
 
 # test using command-line arguments, so use check-local target instead of TESTS
diff --git a/src/bin/bindctl/run_bindctl.sh.in b/src/bin/bindctl/run_bindctl.sh.in
index f4cc40c..350a5b2 100755
--- a/src/bin/bindctl/run_bindctl.sh.in
+++ b/src/bin/bindctl/run_bindctl.sh.in
@@ -27,7 +27,7 @@ export PYTHONPATH
 # required by loadable python modules.
 SET_ENV_LIBRARY_PATH=@SET_ENV_LIBRARY_PATH@
 if test $SET_ENV_LIBRARY_PATH = yes; then
-	@ENV_LIBRARY_PATH@=@abs_top_builddir@/src/lib/dns/.libs:@abs_top_builddir@/src/lib/dns/python/.libs:@abs_top_builddir@/src/lib/cryptolink/.libs:@abs_top_builddir@/src/lib/cc/.libs:@abs_top_builddir@/src/lib/config/.libs:@abs_top_builddir@/src/lib/log/.libs:@abs_top_builddir@/src/lib/util/.libs:@abs_top_builddir@/src/lib/util/io/.libs:@abs_top_builddir@/src/lib/exceptions/.libs:@abs_top_builddir@/src/lib/datasrc/.libs:$@ENV_LIBRARY_PATH@
+	@ENV_LIBRARY_PATH@=@abs_top_builddir@/src/lib/dns/.libs:@abs_top_builddir@/src/lib/dns/python/.libs:@abs_top_builddir@/src/lib/cryptolink/.libs:@abs_top_builddir@/src/lib/cc/.libs:@abs_top_builddir@/src/lib/config/.libs:@abs_top_builddir@/src/lib/log/.libs:@abs_top_builddir@/src/lib/util/.libs:@abs_top_builddir@/src/lib/util/threads/.libs:@abs_top_builddir@/src/lib/util/io/.libs:@abs_top_builddir@/src/lib/exceptions/.libs:@abs_top_builddir@/src/lib/datasrc/.libs:$@ENV_LIBRARY_PATH@
 	export @ENV_LIBRARY_PATH@
 fi
 
diff --git a/src/bin/bindctl/tests/Makefile.am b/src/bin/bindctl/tests/Makefile.am
index 3d08a17..c781d7c 100644
--- a/src/bin/bindctl/tests/Makefile.am
+++ b/src/bin/bindctl/tests/Makefile.am
@@ -6,7 +6,7 @@ EXTRA_DIST = $(PYTESTS)
 # required by loadable python modules.
 LIBRARY_PATH_PLACEHOLDER =
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 endif
 
 # test using command-line arguments, so use check-local target instead of TESTS
diff --git a/src/bin/cfgmgr/plugins/tests/Makefile.am b/src/bin/cfgmgr/plugins/tests/Makefile.am
index 9b8b925..061a39b 100644
--- a/src/bin/cfgmgr/plugins/tests/Makefile.am
+++ b/src/bin/cfgmgr/plugins/tests/Makefile.am
@@ -7,7 +7,7 @@ EXTRA_DIST = $(PYTESTS)
 # required by loadable python modules.
 LIBRARY_PATH_PLACEHOLDER =
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 endif
 
 # test using command-line arguments, so use check-local target instead of TESTS
diff --git a/src/bin/cfgmgr/tests/Makefile.am b/src/bin/cfgmgr/tests/Makefile.am
index a2e43ff..6293571 100644
--- a/src/bin/cfgmgr/tests/Makefile.am
+++ b/src/bin/cfgmgr/tests/Makefile.am
@@ -8,7 +8,7 @@ EXTRA_DIST = testdata/plugins/testplugin.py
 # required by loadable python modules.
 LIBRARY_PATH_PLACEHOLDER =
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 endif
 
 # test using command-line arguments, so use check-local target instead of TESTS
diff --git a/src/bin/cmdctl/run_b10-cmdctl.sh.in b/src/bin/cmdctl/run_b10-cmdctl.sh.in
index 7e63249..3ecbfac 100644
--- a/src/bin/cmdctl/run_b10-cmdctl.sh.in
+++ b/src/bin/cmdctl/run_b10-cmdctl.sh.in
@@ -26,7 +26,7 @@ export PYTHONPATH
 # required by loadable python modules.
 SET_ENV_LIBRARY_PATH=@SET_ENV_LIBRARY_PATH@
 if test $SET_ENV_LIBRARY_PATH = yes; then
-        @ENV_LIBRARY_PATH@=@abs_top_builddir@/src/lib/dns/.libs:@abs_top_builddir@/src/lib/dns/python/.libs:@abs_top_builddir@/src/lib/cryptolink/.libs:@abs_top_builddir@/src/lib/cc/.libs:@abs_top_builddir@/src/lib/config/.libs:@abs_top_builddir@/src/lib/log/.libs:@abs_top_builddir@/src/lib/util/.libs:@abs_top_builddir@/src/lib/util/io/.libs:@abs_top_builddir@/src/lib/exceptions/.libs:@abs_top_builddir@/src/lib/datasrc/.libs:$@ENV_LIBRARY_PATH@
+        @ENV_LIBRARY_PATH@=@abs_top_builddir@/src/lib/dns/.libs:@abs_top_builddir@/src/lib/dns/python/.libs:@abs_top_builddir@/src/lib/cryptolink/.libs:@abs_top_builddir@/src/lib/cc/.libs:@abs_top_builddir@/src/lib/config/.libs:@abs_top_builddir@/src/lib/log/.libs:@abs_top_builddir@/src/lib/util/.libs:@abs_top_builddir@/src/lib/util/threads/.libs:@abs_top_builddir@/src/lib/util/io/.libs:@abs_top_builddir@/src/lib/exceptions/.libs:@abs_top_builddir@/src/lib/datasrc/.libs:$@ENV_LIBRARY_PATH@
         export @ENV_LIBRARY_PATH@
 fi
 
diff --git a/src/bin/cmdctl/tests/Makefile.am b/src/bin/cmdctl/tests/Makefile.am
index b5b65f6..9e14602 100644
--- a/src/bin/cmdctl/tests/Makefile.am
+++ b/src/bin/cmdctl/tests/Makefile.am
@@ -6,7 +6,7 @@ EXTRA_DIST = $(PYTESTS)
 # required by loadable python modules.
 LIBRARY_PATH_PLACEHOLDER =
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 endif
 
 # test using command-line arguments, so use check-local target instead of TESTS
diff --git a/src/bin/dbutil/run_dbutil.sh.in b/src/bin/dbutil/run_dbutil.sh.in
index fea7482..ba2809c 100755
--- a/src/bin/dbutil/run_dbutil.sh.in
+++ b/src/bin/dbutil/run_dbutil.sh.in
@@ -27,7 +27,7 @@ export PYTHONPATH
 # required by loadable python modules.
 SET_ENV_LIBRARY_PATH=@SET_ENV_LIBRARY_PATH@
 if test $SET_ENV_LIBRARY_PATH = yes; then
-	@ENV_LIBRARY_PATH@=@abs_top_builddir@/src/lib/dns/.libs:@abs_top_builddir@/src/lib/dns/python/.libs:@abs_top_builddir@/src/lib/cryptolink/.libs:@abs_top_builddir@/src/lib/cc/.libs:@abs_top_builddir@/src/lib/config/.libs:@abs_top_builddir@/src/lib/log/.libs:@abs_top_builddir@/src/lib/util/.libs:@abs_top_builddir@/src/lib/util/io/.libs:@abs_top_builddir@/src/lib/exceptions/.libs:@abs_top_builddir@/src/lib/datasrc/.libs:$@ENV_LIBRARY_PATH@
+	@ENV_LIBRARY_PATH@=@abs_top_builddir@/src/lib/dns/.libs:@abs_top_builddir@/src/lib/dns/python/.libs:@abs_top_builddir@/src/lib/cryptolink/.libs:@abs_top_builddir@/src/lib/cc/.libs:@abs_top_builddir@/src/lib/config/.libs:@abs_top_builddir@/src/lib/log/.libs:@abs_top_builddir@/src/lib/util/.libs:@abs_top_builddir@/src/lib/util/threads/.libs:@abs_top_builddir@/src/lib/util/io/.libs:@abs_top_builddir@/src/lib/exceptions/.libs:@abs_top_builddir@/src/lib/datasrc/.libs:$@ENV_LIBRARY_PATH@
 	export @ENV_LIBRARY_PATH@
 fi
 
diff --git a/src/bin/ddns/tests/Makefile.am b/src/bin/ddns/tests/Makefile.am
index 5c824d4..bf72353 100644
--- a/src/bin/ddns/tests/Makefile.am
+++ b/src/bin/ddns/tests/Makefile.am
@@ -6,7 +6,7 @@ EXTRA_DIST = $(PYTESTS)
 # required by loadable python modules.
 LIBRARY_PATH_PLACEHOLDER =
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$(abs_top_builddir)/src/lib/acl/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$(abs_top_builddir)/src/lib/acl/.libs:$$$(ENV_LIBRARY_PATH)
 endif
 
 # test using command-line arguments, so use check-local target instead of TESTS
diff --git a/src/bin/dhcp4/tests/Makefile.am b/src/bin/dhcp4/tests/Makefile.am
index ddc3000..019851b 100644
--- a/src/bin/dhcp4/tests/Makefile.am
+++ b/src/bin/dhcp4/tests/Makefile.am
@@ -8,7 +8,7 @@ EXTRA_DIST = $(PYTESTS)
 # about python not being able to load liblog library.
 LIBRARY_PATH_PLACEHOLDER =
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 endif
 
 # test using command-line arguments, so use check-local target instead of TESTS
diff --git a/src/bin/dhcp6/tests/Makefile.am b/src/bin/dhcp6/tests/Makefile.am
index 1629ae6..99e4ee9 100644
--- a/src/bin/dhcp6/tests/Makefile.am
+++ b/src/bin/dhcp6/tests/Makefile.am
@@ -7,7 +7,7 @@ EXTRA_DIST = $(PYTESTS)
 # about python not being able to load liblog library.
 LIBRARY_PATH_PLACEHOLDER =
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 endif
 
 # test using command-line arguments, so use check-local target instead of TESTS
diff --git a/src/bin/loadzone/run_loadzone.sh.in b/src/bin/loadzone/run_loadzone.sh.in
index 43b7920..62688ca 100755
--- a/src/bin/loadzone/run_loadzone.sh.in
+++ b/src/bin/loadzone/run_loadzone.sh.in
@@ -25,7 +25,7 @@ export PYTHONPATH
 # required by loadable python modules.
 SET_ENV_LIBRARY_PATH=@SET_ENV_LIBRARY_PATH@
 if test $SET_ENV_LIBRARY_PATH = yes; then
-	@ENV_LIBRARY_PATH@=@abs_top_builddir@/src/lib/dns/.libs:@abs_top_builddir@/src/lib/dns/python/.libs:@abs_top_builddir@/src/lib/cryptolink/.libs:@abs_top_builddir@/src/lib/cc/.libs:@abs_top_builddir@/src/lib/config/.libs:@abs_top_builddir@/src/lib/log/.libs:@abs_top_builddir@/src/lib/util/.libs:@abs_top_builddir@/src/lib/util/io/.libs:@abs_top_builddir@/src/lib/exceptions/.libs:@abs_top_builddir@/src/lib/datasrc/.libs:$@ENV_LIBRARY_PATH@
+	@ENV_LIBRARY_PATH@=@abs_top_builddir@/src/lib/dns/.libs:@abs_top_builddir@/src/lib/dns/python/.libs:@abs_top_builddir@/src/lib/cryptolink/.libs:@abs_top_builddir@/src/lib/cc/.libs:@abs_top_builddir@/src/lib/config/.libs:@abs_top_builddir@/src/lib/log/.libs:@abs_top_builddir@/src/lib/util/.libs:@abs_top_builddir@/src/lib/util/threads/.libs:@abs_top_builddir@/src/lib/util/io/.libs:@abs_top_builddir@/src/lib/exceptions/.libs:@abs_top_builddir@/src/lib/datasrc/.libs:$@ENV_LIBRARY_PATH@
 	export @ENV_LIBRARY_PATH@
 fi
 
diff --git a/src/bin/loadzone/tests/correct/Makefile.am b/src/bin/loadzone/tests/correct/Makefile.am
index a3c67d4..74b9372 100644
--- a/src/bin/loadzone/tests/correct/Makefile.am
+++ b/src/bin/loadzone/tests/correct/Makefile.am
@@ -20,7 +20,7 @@ noinst_SCRIPTS = correct_test.sh
 # required by loadable python modules.
 LIBRARY_PATH_PLACEHOLDER =
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 endif
 
 # TODO: maybe use TESTS?
diff --git a/src/bin/loadzone/tests/error/Makefile.am b/src/bin/loadzone/tests/error/Makefile.am
index 03263b7..e4783b7 100644
--- a/src/bin/loadzone/tests/error/Makefile.am
+++ b/src/bin/loadzone/tests/error/Makefile.am
@@ -18,7 +18,7 @@ noinst_SCRIPTS = error_test.sh
 # required by loadable python modules.
 LIBRARY_PATH_PLACEHOLDER =
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 endif
 
 # TODO: use TESTS ?
diff --git a/src/bin/msgq/tests/Makefile.am b/src/bin/msgq/tests/Makefile.am
index 50b218b..a0e2994 100644
--- a/src/bin/msgq/tests/Makefile.am
+++ b/src/bin/msgq/tests/Makefile.am
@@ -6,7 +6,7 @@ EXTRA_DIST = $(PYTESTS)
 # required by loadable python modules.
 LIBRARY_PATH_PLACEHOLDER =
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 endif
 
 # test using command-line arguments, so use check-local target instead of TESTS
diff --git a/src/bin/stats/tests/Makefile.am b/src/bin/stats/tests/Makefile.am
index 7484e5d..a5ff4e5 100644
--- a/src/bin/stats/tests/Makefile.am
+++ b/src/bin/stats/tests/Makefile.am
@@ -9,7 +9,7 @@ CLEANFILES = test_utils.pyc
 # required by loadable python modules.
 LIBRARY_PATH_PLACEHOLDER =
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 endif
 
 # test using command-line arguments, so use check-local target instead of TESTS
diff --git a/src/bin/tests/Makefile.am b/src/bin/tests/Makefile.am
index 41b497f..535257c 100644
--- a/src/bin/tests/Makefile.am
+++ b/src/bin/tests/Makefile.am
@@ -8,7 +8,7 @@ noinst_SCRIPTS = $(PYTESTS)
 # required by loadable python modules.
 LIBRARY_PATH_PLACEHOLDER =
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 endif
 
 # test using command-line arguments, so use check-local target instead of TESTS
diff --git a/src/bin/xfrin/tests/Makefile.am b/src/bin/xfrin/tests/Makefile.am
index cba98ae..29f94ee 100644
--- a/src/bin/xfrin/tests/Makefile.am
+++ b/src/bin/xfrin/tests/Makefile.am
@@ -8,7 +8,7 @@ EXTRA_DIST = $(PYTESTS)
 # required by loadable python modules.
 LIBRARY_PATH_PLACEHOLDER =
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 else
 # Some systems need the ds path even if not all paths are necessary
 LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/datasrc/.libs
diff --git a/src/bin/xfrout/tests/Makefile.am b/src/bin/xfrout/tests/Makefile.am
index ad6d7e6..acaee34 100644
--- a/src/bin/xfrout/tests/Makefile.am
+++ b/src/bin/xfrout/tests/Makefile.am
@@ -10,7 +10,7 @@ EXTRA_DIST += testdata/example.com testdata/creatediff.py
 # required by loadable python modules.
 LIBRARY_PATH_PLACEHOLDER =
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$(abs_top_builddir)/src/lib/acl/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$(abs_top_builddir)/src/lib/acl/.libs:$$$(ENV_LIBRARY_PATH)
 else
 # Some systems need the ds path even if not all paths are necessary
 LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/datasrc/.libs
diff --git a/src/bin/zonemgr/tests/Makefile.am b/src/bin/zonemgr/tests/Makefile.am
index b60fae7..72b842a 100644
--- a/src/bin/zonemgr/tests/Makefile.am
+++ b/src/bin/zonemgr/tests/Makefile.am
@@ -7,7 +7,7 @@ CLEANFILES = initdb.file
 # required by loadable python modules.
 LIBRARY_PATH_PLACEHOLDER =
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 endif
 
 # test using command-line arguments, so use check-local target instead of TESTS
diff --git a/src/lib/dns/python/tests/Makefile.am b/src/lib/dns/python/tests/Makefile.am
index 4b0ea9f..45c2615 100644
--- a/src/lib/dns/python/tests/Makefile.am
+++ b/src/lib/dns/python/tests/Makefile.am
@@ -26,7 +26,7 @@ EXTRA_DIST += testutil.py
 # required by loadable python modules.
 LIBRARY_PATH_PLACEHOLDER =
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$$$(ENV_LIBRARY_PATH)
 endif
 
 # test using command-line arguments, so use check-local target instead of TESTS
diff --git a/src/lib/python/isc/acl/tests/Makefile.am b/src/lib/python/isc/acl/tests/Makefile.am
index e0a1895..efe3664 100644
--- a/src/lib/python/isc/acl/tests/Makefile.am
+++ b/src/lib/python/isc/acl/tests/Makefile.am
@@ -7,7 +7,7 @@ EXTRA_DIST = $(PYTESTS)
 # required by loadable python modules.
 LIBRARY_PATH_PLACEHOLDER =
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/acl/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/acl/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 endif
 
 # test using command-line arguments, so use check-local target instead of TESTS
diff --git a/src/lib/python/isc/bind10/tests/Makefile.am b/src/lib/python/isc/bind10/tests/Makefile.am
index 196a8b9..12fb948 100644
--- a/src/lib/python/isc/bind10/tests/Makefile.am
+++ b/src/lib/python/isc/bind10/tests/Makefile.am
@@ -9,7 +9,7 @@ EXTRA_DIST = $(PYTESTS)
 # required by loadable python modules.
 LIBRARY_PATH_PLACEHOLDER =
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 endif
 
 # test using command-line arguments, so use check-local target instead of TESTS
diff --git a/src/lib/python/isc/cc/tests/Makefile.am b/src/lib/python/isc/cc/tests/Makefile.am
index 4c2acc0..7b4288c 100644
--- a/src/lib/python/isc/cc/tests/Makefile.am
+++ b/src/lib/python/isc/cc/tests/Makefile.am
@@ -10,7 +10,7 @@ EXTRA_DIST += test_session.py
 # required by loadable python modules.
 LIBRARY_PATH_PLACEHOLDER =
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 endif
 
 # test using command-line arguments, so use check-local target instead of TESTS
diff --git a/src/lib/python/isc/config/tests/Makefile.am b/src/lib/python/isc/config/tests/Makefile.am
index cb59e6f..8c79c84 100644
--- a/src/lib/python/isc/config/tests/Makefile.am
+++ b/src/lib/python/isc/config/tests/Makefile.am
@@ -8,7 +8,7 @@ EXTRA_DIST += unittest_fakesession.py
 # required by loadable python modules.
 LIBRARY_PATH_PLACEHOLDER =
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 endif
 
 # test using command-line arguments, so use check-local target instead of TESTS
diff --git a/src/lib/python/isc/datasrc/tests/Makefile.am b/src/lib/python/isc/datasrc/tests/Makefile.am
index 34af092..d91cbec 100644
--- a/src/lib/python/isc/datasrc/tests/Makefile.am
+++ b/src/lib/python/isc/datasrc/tests/Makefile.am
@@ -18,7 +18,7 @@ CLEANFILES = $(abs_builddir)/rwtest.sqlite3.copied
 # of scope for this ticket
 LIBRARY_PATH_PLACEHOLDER = $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/datasrc/.libs:
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 else
 LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 endif
diff --git a/src/lib/python/isc/ddns/tests/Makefile.am b/src/lib/python/isc/ddns/tests/Makefile.am
index 4235a2b..9374dde 100644
--- a/src/lib/python/isc/ddns/tests/Makefile.am
+++ b/src/lib/python/isc/ddns/tests/Makefile.am
@@ -6,7 +6,7 @@ CLEANFILES = $(builddir)/rwtest.sqlite3.copied
 # If necessary (rare cases), explicitly specify paths to dynamic libraries
 # required by loadable python modules.
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER = $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/acl/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER = $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/acl/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 endif
 
 # test using command-line arguments, so use check-local target instead of TESTS
diff --git a/src/lib/python/isc/log/tests/Makefile.am b/src/lib/python/isc/log/tests/Makefile.am
index ec29b7a..14f10a2 100644
--- a/src/lib/python/isc/log/tests/Makefile.am
+++ b/src/lib/python/isc/log/tests/Makefile.am
@@ -8,7 +8,7 @@ EXTRA_DIST = console.out check_output.sh $(PYTESTS_NOGEN)
 # required by loadable python modules.
 LIBRARY_PATH_PLACEHOLDER =
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 endif
 
 # test using command-line arguments, so use check-local target instead of TESTS
diff --git a/src/lib/python/isc/net/tests/Makefile.am b/src/lib/python/isc/net/tests/Makefile.am
index dd94946..44f6063 100644
--- a/src/lib/python/isc/net/tests/Makefile.am
+++ b/src/lib/python/isc/net/tests/Makefile.am
@@ -6,7 +6,7 @@ EXTRA_DIST = $(PYTESTS)
 # required by loadable python modules.
 LIBRARY_PATH_PLACEHOLDER =
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 endif
 
 # test using command-line arguments, so use check-local target instead of TESTS
diff --git a/src/lib/python/isc/notify/tests/Makefile.am b/src/lib/python/isc/notify/tests/Makefile.am
index 3af5991..d964880 100644
--- a/src/lib/python/isc/notify/tests/Makefile.am
+++ b/src/lib/python/isc/notify/tests/Makefile.am
@@ -11,7 +11,7 @@ EXTRA_DIST += testdata/multisoa.example
 # required by loadable python modules.
 LIBRARY_PATH_PLACEHOLDER =
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 else
 # Some systems need the ds path even if not all paths are necessary
 LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/datasrc/.libs
diff --git a/src/lib/python/isc/server_common/tests/Makefile.am b/src/lib/python/isc/server_common/tests/Makefile.am
index 82cd854..fff57d6 100644
--- a/src/lib/python/isc/server_common/tests/Makefile.am
+++ b/src/lib/python/isc/server_common/tests/Makefile.am
@@ -6,7 +6,7 @@ EXTRA_DIST = $(PYTESTS)
 # required by loadable python modules.
 LIBRARY_PATH_PLACEHOLDER =
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 endif
 
 # test using command-line arguments, so use check-local target instead of TESTS
diff --git a/src/lib/python/isc/sysinfo/tests/Makefile.am b/src/lib/python/isc/sysinfo/tests/Makefile.am
index 9759c77..c0b3f10 100644
--- a/src/lib/python/isc/sysinfo/tests/Makefile.am
+++ b/src/lib/python/isc/sysinfo/tests/Makefile.am
@@ -5,7 +5,7 @@ EXTRA_DIST = $(PYTESTS)
 # If necessary (rare cases), explicitly specify paths to dynamic libraries
 # required by loadable python modules.
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER = $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/acl/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER = $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/acl/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 endif
 
 # test using command-line arguments, so use check-local target instead of TESTS
diff --git a/src/lib/python/isc/util/cio/tests/Makefile.am b/src/lib/python/isc/util/cio/tests/Makefile.am
index 3429009..0330ef6 100644
--- a/src/lib/python/isc/util/cio/tests/Makefile.am
+++ b/src/lib/python/isc/util/cio/tests/Makefile.am
@@ -6,7 +6,7 @@ EXTRA_DIST = $(PYTESTS)
 # required by loadable python modules.
 LIBRARY_PATH_PLACEHOLDER =
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/util/io/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 endif
 
 # test using command-line arguments, so use check-local target instead of TESTS
diff --git a/src/lib/python/isc/util/tests/Makefile.am b/src/lib/python/isc/util/tests/Makefile.am
index 3b882b4..03b890e 100644
--- a/src/lib/python/isc/util/tests/Makefile.am
+++ b/src/lib/python/isc/util/tests/Makefile.am
@@ -6,7 +6,7 @@ EXTRA_DIST = $(PYTESTS)
 # required by loadable python modules.
 LIBRARY_PATH_PLACEHOLDER =
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 endif
 
 # test using command-line arguments, so use check-local target instead of TESTS
diff --git a/src/lib/python/isc/xfrin/tests/Makefile.am b/src/lib/python/isc/xfrin/tests/Makefile.am
index 459efc3..89769d0 100644
--- a/src/lib/python/isc/xfrin/tests/Makefile.am
+++ b/src/lib/python/isc/xfrin/tests/Makefile.am
@@ -6,7 +6,7 @@ EXTRA_DIST = $(PYTESTS)
 # required by loadable python modules.
 LIBRARY_PATH_PLACEHOLDER =
 if SET_ENV_LIBRARY_PATH
-LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
+LIBRARY_PATH_PLACEHOLDER += $(ENV_LIBRARY_PATH)=$(abs_top_builddir)/src/lib/cryptolink/.libs:$(abs_top_builddir)/src/lib/dns/.libs:$(abs_top_builddir)/src/lib/dns/python/.libs:$(abs_top_builddir)/src/lib/cc/.libs:$(abs_top_builddir)/src/lib/config/.libs:$(abs_top_builddir)/src/lib/log/.libs:$(abs_top_builddir)/src/lib/util/.libs:$(abs_top_builddir)/src/lib/util/threads/.libs:$(abs_top_builddir)/src/lib/exceptions/.libs:$(abs_top_builddir)/src/lib/datasrc/.libs:$$$(ENV_LIBRARY_PATH)
 endif
 
 # test using command-line arguments, so use check-local target instead of TESTS
diff --git a/src/lib/util/threads/Makefile.am b/src/lib/util/threads/Makefile.am
index 121e4ab..7ab6f32 100644
--- a/src/lib/util/threads/Makefile.am
+++ b/src/lib/util/threads/Makefile.am
@@ -7,6 +7,7 @@ AM_CPPFLAGS += $(BOOST_INCLUDES) $(MULTITHREADING_FLAG)
 lib_LTLIBRARIES = libb10-threads.la
 libb10_threads_la_SOURCES  = sync.h sync.cc
 libb10_threads_la_SOURCES += thread.h thread.cc
-libb10_threads_la_LIBADD = $(top_builddir)/src/lib/exceptions/libb10-exceptions.la
+libb10_threads_la_LIBADD  = $(top_builddir)/src/lib/exceptions/libb10-exceptions.la
+libb10_threads_la_LIBADD += $(PTHREAD_LDFLAGS)
 
 CLEANFILES = *.gcno *.gcda
diff --git a/src/lib/util/threads/sync.cc b/src/lib/util/threads/sync.cc
index 46a5646..0e0ec08 100644
--- a/src/lib/util/threads/sync.cc
+++ b/src/lib/util/threads/sync.cc
@@ -169,6 +169,26 @@ Mutex::lock() {
 #endif // ENABLE_DEBUG
 }
 
+bool
+Mutex::tryLock() {
+    assert(impl_ != NULL);
+    const int result = pthread_mutex_trylock(&impl_->mutex);
+    // In the case of pthread_mutex_trylock(), if it is called on a
+    // locked mutex from the same thread, some platforms (such as fedora
+    // and debian) return EBUSY whereas others (such as centos 5) return
+    // EDEADLK. We return false and don't pass the lock attempt in both
+    // cases.
+    if (result == EBUSY || result == EDEADLK) {
+        return (false);
+    } else if (result != 0) {
+        isc_throw(isc::InvalidOperation, std::strerror(result));
+    }
+#ifdef ENABLE_DEBUG
+    postLockAction();           // Only in debug mode
+#endif // ENABLE_DEBUG
+    return (true);
+}
+
 void
 Mutex::unlock() {
     assert(impl_ != NULL);
diff --git a/src/lib/util/threads/sync.h b/src/lib/util/threads/sync.h
index 87c78be..4da5ef1 100644
--- a/src/lib/util/threads/sync.h
+++ b/src/lib/util/threads/sync.h
@@ -15,6 +15,8 @@
 #ifndef B10_THREAD_SYNC_H
 #define B10_THREAD_SYNC_H
 
+#include <exceptions/exceptions.h>
+
 #include <boost/noncopyable.hpp>
 
 #include <cstdlib> // for NULL.
@@ -77,17 +79,34 @@ public:
     /// of function no matter by what means.
     class Locker : boost::noncopyable {
     public:
+        /// \brief Exception thrown when the mutex is already locked and
+        ///     a non-blocking locker is attempted around it.
+        struct AlreadyLocked : public isc::InvalidParameter {
+            AlreadyLocked(const char* file, size_t line, const char* what) :
+                isc::InvalidParameter(file, line, what)
+            {}
+        };
+
         /// \brief Constructor.
         ///
-        /// Locks the mutex. May block for extended period of time.
+        /// Locks the mutex. May block for extended period of time if
+        /// \c block is true.
         ///
         /// \throw isc::InvalidOperation when OS reports error. This usually
         ///     means an attempt to use the mutex in a wrong way (locking
         ///     a mutex second time from the same thread, for example).
-        Locker(Mutex& mutex) :
+        /// \throw AlreadyLocked if \c block is false and the mutex is
+        ///     already locked.
+        Locker(Mutex& mutex, bool block = true) :
             mutex_(mutex)
         {
-            mutex.lock();
+            if (block) {
+                mutex.lock();
+            } else {
+                if (!mutex.tryLock()) {
+                    isc_throw(AlreadyLocked, "The mutex is already locked");
+                }
+            }
         }
 
         /// \brief Destructor.
@@ -107,6 +126,33 @@ public:
     ///
     /// \todo Disable in non-debug build
     bool locked() const;
+
+private:
+    /// \brief Lock the mutex
+    ///
+    /// This method blocks until the mutex can be locked.
+    ///
+    /// Please consider not using this method directly and instead using
+    /// a Mutex::Locker object instead.
+    void lock();
+
+    /// \brief Try to lock the mutex
+    ///
+    /// This method doesn't block and returns immediately with a status
+    /// on whether the lock operation was successful.
+    ///
+    /// Please consider not using this method directly and instead using
+    /// a Mutex::Locker object instead.
+    ///
+    /// \return true if the lock was successful, false otherwise.
+    bool tryLock();
+
+    /// \brief Unlock the mutex
+    ///
+    /// Please consider not using this method directly and instead using
+    /// a Mutex::Locker object instead.
+    void unlock();
+
 private:
     friend class CondVar;
 
@@ -131,8 +177,6 @@ private:
 
     class Impl;
     Impl* impl_;
-    void lock();
-    void unlock();
 };
 
 /// \brief Encapsulation for a condition variable.
diff --git a/src/lib/util/threads/tests/lock_unittest.cc b/src/lib/util/threads/tests/lock_unittest.cc
index 1abc3fa..423b84b 100644
--- a/src/lib/util/threads/tests/lock_unittest.cc
+++ b/src/lib/util/threads/tests/lock_unittest.cc
@@ -44,6 +44,44 @@ TEST(MutexTest, lockMultiple) {
         Mutex::Locker l2(mutex); // Attempt to lock again.
     }, isc::InvalidOperation);
     EXPECT_TRUE(mutex.locked()); // Debug-only build
+
+    // block=true explicitly.
+    Mutex mutex2;
+    EXPECT_FALSE(mutex2.locked()); // Debug-only build
+    Mutex::Locker l12(mutex2, true);
+    EXPECT_TRUE(mutex2.locked()); // Debug-only build
+}
+
+void
+testThread(Mutex* mutex)
+{
+    // block=false (tryLock).  This should not block indefinitely, but
+    // throw AlreadyLocked. If block were true, this would block
+    // indefinitely here.
+    EXPECT_THROW({
+        Mutex::Locker l3(*mutex, false);
+    }, Mutex::Locker::AlreadyLocked);
+
+    EXPECT_TRUE(mutex->locked()); // Debug-only build
+}
+
+// Test the non-blocking variant using a second thread.
+TEST(MutexTest, lockNonBlocking) {
+    // block=false (tryLock).
+    Mutex mutex;
+    Mutex::Locker l1(mutex, false);
+    EXPECT_TRUE(mutex.locked()); // Debug-only build
+
+    // First, try another locker from the same thread.
+    EXPECT_THROW({
+        Mutex::Locker l2(mutex, false);
+    }, Mutex::Locker::AlreadyLocked);
+
+    EXPECT_TRUE(mutex.locked()); // Debug-only build
+
+    // Now try another locker from a different thread.
+    Thread thread(boost::bind(&testThread, &mutex));
+    thread.wait();
 }
 
 #endif // ENABLE_DEBUG
diff --git a/tests/lettuce/setup_intree_bind10.sh.in b/tests/lettuce/setup_intree_bind10.sh.in
index 4ccf6ca..ecbbbec 100644
--- a/tests/lettuce/setup_intree_bind10.sh.in
+++ b/tests/lettuce/setup_intree_bind10.sh.in
@@ -30,7 +30,7 @@ export PYTHONPATH
 # required by loadable python modules.
 SET_ENV_LIBRARY_PATH=@SET_ENV_LIBRARY_PATH@
 if test $SET_ENV_LIBRARY_PATH = yes; then
-	@ENV_LIBRARY_PATH@=@abs_top_builddir@/src/lib/dns/.libs:@abs_top_builddir@/src/lib/dns/python/.libs:@abs_top_builddir@/src/lib/cryptolink/.libs:@abs_top_builddir@/src/lib/cc/.libs:@abs_top_builddir@/src/lib/config/.libs:@abs_top_builddir@/src/lib/log/.libs:@abs_top_builddir@/src/lib/acl/.libs:@abs_top_builddir@/src/lib/util/.libs:@abs_top_builddir@/src/lib/util/io/.libs:@abs_top_builddir@/src/lib/exceptions/.libs:@abs_top_builddir@/src/lib/datasrc/.libs:$@ENV_LIBRARY_PATH@
+	@ENV_LIBRARY_PATH@=@abs_top_builddir@/src/lib/dns/.libs:@abs_top_builddir@/src/lib/dns/python/.libs:@abs_top_builddir@/src/lib/cryptolink/.libs:@abs_top_builddir@/src/lib/cc/.libs:@abs_top_builddir@/src/lib/config/.libs:@abs_top_builddir@/src/lib/log/.libs:@abs_top_builddir@/src/lib/acl/.libs:@abs_top_builddir@/src/lib/util/.libs:@abs_top_builddir@/src/lib/util/threads/.libs:@abs_top_builddir@/src/lib/util/io/.libs:@abs_top_builddir@/src/lib/exceptions/.libs:@abs_top_builddir@/src/lib/datasrc/.libs:$@ENV_LIBRARY_PATH@
 	export @ENV_LIBRARY_PATH@
 fi
 



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