diff --git a/aclocal.m4 b/aclocal.m4
index a7ee53146f..b667d3abcb 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -1,17 +1,295 @@
-sinclude(libtool.m4/libtool.m4)dnl
-sinclude(libtool.m4/ltoptions.m4)dnl
-sinclude(libtool.m4/ltsugar.m4)dnl
-sinclude(libtool.m4/ltversion.m4)dnl
-sinclude(libtool.m4/lt~obsolete.m4)dnl
+# generated automatically by aclocal 1.16.1 -*- Autoconf -*-
 
-m4_divert_text(HELP_CANON, [[
-  NOTE: If PREFIX is not set, then the default values for --sysconfdir
-  and --localstatedir are /etc and /var, respectively.]])
-m4_divert_text(HELP_END, [[
-Professional support for BIND is provided by Internet Systems Consortium,
-Inc.  Information about paid support and training options is available at
-https://www.isc.org/support.
+# Copyright (C) 1996-2018 Free Software Foundation, Inc.
 
-Help can also often be found on the BIND Users mailing list
-(https://lists.isc.org/mailman/listinfo/bind-users) or in the #bind
-channel of the Freenode IRC service.]])
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+m4_ifndef([AC_CONFIG_MACRO_DIRS], [m4_defun([_AM_CONFIG_MACRO_DIRS], [])m4_defun([AC_CONFIG_MACRO_DIRS], [_AM_CONFIG_MACRO_DIRS($@)])])
+# pkg.m4 - Macros to locate and utilise pkg-config.   -*- Autoconf -*-
+# serial 12 (pkg-config-0.29.2)
+
+dnl Copyright © 2004 Scott James Remnant <scott@netsplit.com>.
+dnl Copyright © 2012-2015 Dan Nicholson <dbn.lists@gmail.com>
+dnl
+dnl This program is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 2 of the License, or
+dnl (at your option) any later version.
+dnl
+dnl This program is distributed in the hope that it will be useful, but
+dnl WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+dnl General Public License for more details.
+dnl
+dnl You should have received a copy of the GNU General Public License
+dnl along with this program; if not, write to the Free Software
+dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+dnl 02111-1307, USA.
+dnl
+dnl As a special exception to the GNU General Public License, if you
+dnl distribute this file as part of a program that contains a
+dnl configuration script generated by Autoconf, you may include it under
+dnl the same distribution terms that you use for the rest of that
+dnl program.
+
+dnl PKG_PREREQ(MIN-VERSION)
+dnl -----------------------
+dnl Since: 0.29
+dnl
+dnl Verify that the version of the pkg-config macros are at least
+dnl MIN-VERSION. Unlike PKG_PROG_PKG_CONFIG, which checks the user's
+dnl installed version of pkg-config, this checks the developer's version
+dnl of pkg.m4 when generating configure.
+dnl
+dnl To ensure that this macro is defined, also add:
+dnl m4_ifndef([PKG_PREREQ],
+dnl     [m4_fatal([must install pkg-config 0.29 or later before running autoconf/autogen])])
+dnl
+dnl See the "Since" comment for each macro you use to see what version
+dnl of the macros you require.
+m4_defun([PKG_PREREQ],
+[m4_define([PKG_MACROS_VERSION], [0.29.2])
+m4_if(m4_version_compare(PKG_MACROS_VERSION, [$1]), -1,
+    [m4_fatal([pkg.m4 version $1 or higher is required but ]PKG_MACROS_VERSION[ found])])
+])dnl PKG_PREREQ
+
+dnl PKG_PROG_PKG_CONFIG([MIN-VERSION])
+dnl ----------------------------------
+dnl Since: 0.16
+dnl
+dnl Search for the pkg-config tool and set the PKG_CONFIG variable to
+dnl first found in the path. Checks that the version of pkg-config found
+dnl is at least MIN-VERSION. If MIN-VERSION is not specified, 0.9.0 is
+dnl used since that's the first version where most current features of
+dnl pkg-config existed.
+AC_DEFUN([PKG_PROG_PKG_CONFIG],
+[m4_pattern_forbid([^_?PKG_[A-Z_]+$])
+m4_pattern_allow([^PKG_CONFIG(_(PATH|LIBDIR|SYSROOT_DIR|ALLOW_SYSTEM_(CFLAGS|LIBS)))?$])
+m4_pattern_allow([^PKG_CONFIG_(DISABLE_UNINSTALLED|TOP_BUILD_DIR|DEBUG_SPEW)$])
+AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility])
+AC_ARG_VAR([PKG_CONFIG_PATH], [directories to add to pkg-config's search path])
+AC_ARG_VAR([PKG_CONFIG_LIBDIR], [path overriding pkg-config's built-in search path])
+
+if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
+	AC_PATH_TOOL([PKG_CONFIG], [pkg-config])
+fi
+if test -n "$PKG_CONFIG"; then
+	_pkg_min_version=m4_default([$1], [0.9.0])
+	AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version])
+	if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then
+		AC_MSG_RESULT([yes])
+	else
+		AC_MSG_RESULT([no])
+		PKG_CONFIG=""
+	fi
+fi[]dnl
+])dnl PKG_PROG_PKG_CONFIG
+
+dnl PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+dnl -------------------------------------------------------------------
+dnl Since: 0.18
+dnl
+dnl Check to see whether a particular set of modules exists. Similar to
+dnl PKG_CHECK_MODULES(), but does not set variables or print errors.
+dnl
+dnl Please remember that m4 expands AC_REQUIRE([PKG_PROG_PKG_CONFIG])
+dnl only at the first occurence in configure.ac, so if the first place
+dnl it's called might be skipped (such as if it is within an "if", you
+dnl have to call PKG_CHECK_EXISTS manually
+AC_DEFUN([PKG_CHECK_EXISTS],
+[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
+if test -n "$PKG_CONFIG" && \
+    AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then
+  m4_default([$2], [:])
+m4_ifvaln([$3], [else
+  $3])dnl
+fi])
+
+dnl _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES])
+dnl ---------------------------------------------
+dnl Internal wrapper calling pkg-config via PKG_CONFIG and setting
+dnl pkg_failed based on the result.
+m4_define([_PKG_CONFIG],
+[if test -n "$$1"; then
+    pkg_cv_[]$1="$$1"
+ elif test -n "$PKG_CONFIG"; then
+    PKG_CHECK_EXISTS([$3],
+                     [pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3" 2>/dev/null`
+		      test "x$?" != "x0" && pkg_failed=yes ],
+		     [pkg_failed=yes])
+ else
+    pkg_failed=untried
+fi[]dnl
+])dnl _PKG_CONFIG
+
+dnl _PKG_SHORT_ERRORS_SUPPORTED
+dnl ---------------------------
+dnl Internal check to see if pkg-config supports short errors.
+AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED],
+[AC_REQUIRE([PKG_PROG_PKG_CONFIG])
+if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
+        _pkg_short_errors_supported=yes
+else
+        _pkg_short_errors_supported=no
+fi[]dnl
+])dnl _PKG_SHORT_ERRORS_SUPPORTED
+
+
+dnl PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
+dnl   [ACTION-IF-NOT-FOUND])
+dnl --------------------------------------------------------------
+dnl Since: 0.4.0
+dnl
+dnl Note that if there is a possibility the first call to
+dnl PKG_CHECK_MODULES might not happen, you should be sure to include an
+dnl explicit call to PKG_PROG_PKG_CONFIG in your configure.ac
+AC_DEFUN([PKG_CHECK_MODULES],
+[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
+AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl
+AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl
+
+pkg_failed=no
+AC_MSG_CHECKING([for $2])
+
+_PKG_CONFIG([$1][_CFLAGS], [cflags], [$2])
+_PKG_CONFIG([$1][_LIBS], [libs], [$2])
+
+m4_define([_PKG_TEXT], [Alternatively, you may set the environment variables $1[]_CFLAGS
+and $1[]_LIBS to avoid the need to call pkg-config.
+See the pkg-config man page for more details.])
+
+if test $pkg_failed = yes; then
+        AC_MSG_RESULT([no])
+        _PKG_SHORT_ERRORS_SUPPORTED
+        if test $_pkg_short_errors_supported = yes; then
+	        $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "$2" 2>&1`
+        else
+	        $1[]_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "$2" 2>&1`
+        fi
+	# Put the nasty error message in config.log where it belongs
+	echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD
+
+	m4_default([$4], [AC_MSG_ERROR(
+[Package requirements ($2) were not met:
+
+$$1_PKG_ERRORS
+
+Consider adjusting the PKG_CONFIG_PATH environment variable if you
+installed software in a non-standard prefix.
+
+_PKG_TEXT])[]dnl
+        ])
+elif test $pkg_failed = untried; then
+        AC_MSG_RESULT([no])
+	m4_default([$4], [AC_MSG_FAILURE(
+[The pkg-config script could not be found or is too old.  Make sure it
+is in your PATH or set the PKG_CONFIG environment variable to the full
+path to pkg-config.
+
+_PKG_TEXT
+
+To get pkg-config, see <http://pkg-config.freedesktop.org/>.])[]dnl
+        ])
+else
+	$1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS
+	$1[]_LIBS=$pkg_cv_[]$1[]_LIBS
+        AC_MSG_RESULT([yes])
+	$3
+fi[]dnl
+])dnl PKG_CHECK_MODULES
+
+
+dnl PKG_CHECK_MODULES_STATIC(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
+dnl   [ACTION-IF-NOT-FOUND])
+dnl ---------------------------------------------------------------------
+dnl Since: 0.29
+dnl
+dnl Checks for existence of MODULES and gathers its build flags with
+dnl static libraries enabled. Sets VARIABLE-PREFIX_CFLAGS from --cflags
+dnl and VARIABLE-PREFIX_LIBS from --libs.
+dnl
+dnl Note that if there is a possibility the first call to
+dnl PKG_CHECK_MODULES_STATIC might not happen, you should be sure to
+dnl include an explicit call to PKG_PROG_PKG_CONFIG in your
+dnl configure.ac.
+AC_DEFUN([PKG_CHECK_MODULES_STATIC],
+[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
+_save_PKG_CONFIG=$PKG_CONFIG
+PKG_CONFIG="$PKG_CONFIG --static"
+PKG_CHECK_MODULES($@)
+PKG_CONFIG=$_save_PKG_CONFIG[]dnl
+])dnl PKG_CHECK_MODULES_STATIC
+
+
+dnl PKG_INSTALLDIR([DIRECTORY])
+dnl -------------------------
+dnl Since: 0.27
+dnl
+dnl Substitutes the variable pkgconfigdir as the location where a module
+dnl should install pkg-config .pc files. By default the directory is
+dnl $libdir/pkgconfig, but the default can be changed by passing
+dnl DIRECTORY. The user can override through the --with-pkgconfigdir
+dnl parameter.
+AC_DEFUN([PKG_INSTALLDIR],
+[m4_pushdef([pkg_default], [m4_default([$1], ['${libdir}/pkgconfig'])])
+m4_pushdef([pkg_description],
+    [pkg-config installation directory @<:@]pkg_default[@:>@])
+AC_ARG_WITH([pkgconfigdir],
+    [AS_HELP_STRING([--with-pkgconfigdir], pkg_description)],,
+    [with_pkgconfigdir=]pkg_default)
+AC_SUBST([pkgconfigdir], [$with_pkgconfigdir])
+m4_popdef([pkg_default])
+m4_popdef([pkg_description])
+])dnl PKG_INSTALLDIR
+
+
+dnl PKG_NOARCH_INSTALLDIR([DIRECTORY])
+dnl --------------------------------
+dnl Since: 0.27
+dnl
+dnl Substitutes the variable noarch_pkgconfigdir as the location where a
+dnl module should install arch-independent pkg-config .pc files. By
+dnl default the directory is $datadir/pkgconfig, but the default can be
+dnl changed by passing DIRECTORY. The user can override through the
+dnl --with-noarch-pkgconfigdir parameter.
+AC_DEFUN([PKG_NOARCH_INSTALLDIR],
+[m4_pushdef([pkg_default], [m4_default([$1], ['${datadir}/pkgconfig'])])
+m4_pushdef([pkg_description],
+    [pkg-config arch-independent installation directory @<:@]pkg_default[@:>@])
+AC_ARG_WITH([noarch-pkgconfigdir],
+    [AS_HELP_STRING([--with-noarch-pkgconfigdir], pkg_description)],,
+    [with_noarch_pkgconfigdir=]pkg_default)
+AC_SUBST([noarch_pkgconfigdir], [$with_noarch_pkgconfigdir])
+m4_popdef([pkg_default])
+m4_popdef([pkg_description])
+])dnl PKG_NOARCH_INSTALLDIR
+
+
+dnl PKG_CHECK_VAR(VARIABLE, MODULE, CONFIG-VARIABLE,
+dnl [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+dnl -------------------------------------------
+dnl Since: 0.28
+dnl
+dnl Retrieves the value of the pkg-config variable for the given module.
+AC_DEFUN([PKG_CHECK_VAR],
+[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
+AC_ARG_VAR([$1], [value of $3 for $2, overriding pkg-config])dnl
+
+_PKG_CONFIG([$1], [variable="][$3]["], [$2])
+AS_VAR_COPY([$1], [pkg_cv_][$1])
+
+AS_VAR_IF([$1], [""], [$5], [$4])dnl
+])dnl PKG_CHECK_VAR
+
+m4_include([libtool.m4/libtool.m4])
+m4_include([libtool.m4/ltoptions.m4])
+m4_include([libtool.m4/ltsugar.m4])
+m4_include([libtool.m4/ltversion.m4])
+m4_include([libtool.m4/lt~obsolete.m4])
diff --git a/config.h.in b/config.h.in
index 7d89fe0ae8..e68e3ed1b7 100644
--- a/config.h.in
+++ b/config.h.in
@@ -203,6 +203,9 @@ int sigwait(const unsigned int *set, int *sig);
 /* Define if clock_gettime is available. */
 #undef HAVE_CLOCK_GETTIME
 
+/* Define to 1 if you have the <cmocka.h> header file. */
+#undef HAVE_CMOCKA_H
+
 /* Define to 1 if you have the <devpoll.h> header file. */
 #undef HAVE_DEVPOLL_H
 
diff --git a/configure b/configure
index 36555811b6..f6a5b5e6e4 100755
--- a/configure
+++ b/configure
@@ -673,6 +673,8 @@ UNITTESTS
 ATFLIBS
 ATFBIN
 ATFBUILD
+CMOCKA_LIBS
+CMOCKA_CFLAGS
 LIBIDN2_LIBS
 LIBIDN2_CFLAGS
 XSLT_DBLATEX_FASTBOOK
@@ -859,6 +861,9 @@ ETAGS
 LN
 ARFLAGS
 XTARGETS
+PKG_CONFIG_LIBDIR
+PKG_CONFIG_PATH
+PKG_CONFIG
 BACKTRACECFLAGS
 CCNOOPT
 CCOPT
@@ -1023,6 +1028,7 @@ with_protobuf_c
 with_libfstrm
 with_docbook_xsl
 with_libidn2
+with_cmocka
 with_atf
 with_tuning
 enable_querytrace
@@ -1047,7 +1053,12 @@ LDFLAGS
 LIBS
 CPPFLAGS
 LT_SYS_LIBRARY_PATH
-CPP'
+CPP
+PKG_CONFIG
+PKG_CONFIG_PATH
+PKG_CONFIG_LIBDIR
+CMOCKA_CFLAGS
+CMOCKA_LIBS'
 
 
 # Initialize some variables set by options.
@@ -1645,9 +1656,6 @@ _ACEOF
 
   cat <<\_ACEOF
 
-  NOTE: If PREFIX is not set, then the default values for --sysconfdir
-  and --localstatedir are /etc and /var, respectively.
-
 System types:
   --build=BUILD     configure for building on BUILD [guessed]
   --host=HOST       cross-compile to build programs to run on HOST [BUILD]
@@ -1753,6 +1761,7 @@ Optional Packages:
   --with-libfstrm=path    Path where libfstrm is installed, for dnstap
   --with-docbook-xsl=PATH specify path for Docbook-XSL stylesheets
   --with-libidn2=PATH     enable IDN support using GNU libidn2 [yes|no|path]
+  --with-cmocka=no        enable cmocka based tests (default is no)
   --with-atf              support Automated Test Framework
   --with-tuning=ARG       Specify server tuning (large or default)
   --with-dlopen=ARG       support dynamically loadable DLZ drivers
@@ -1785,18 +1794,18 @@ Some influential environment variables:
   LT_SYS_LIBRARY_PATH
               User-defined run-time library search path.
   CPP         C preprocessor
+  PKG_CONFIG  path to pkg-config utility
+  PKG_CONFIG_PATH
+              directories to add to pkg-config's search path
+  PKG_CONFIG_LIBDIR
+              path overriding pkg-config's built-in search path
+  CMOCKA_CFLAGS
+              C compiler flags for CMOCKA, overriding pkg-config
+  CMOCKA_LIBS linker flags for CMOCKA, overriding pkg-config
 
 Use these variables to override the choices made by `configure' or to help
 it to find libraries and programs with nonstandard names/locations.
 
-Professional support for BIND is provided by Internet Systems Consortium,
-Inc.  Information about paid support and training options is available at
-https://www.isc.org/support.
-
-Help can also often be found on the BIND Users mailing list
-(https://lists.isc.org/mailman/listinfo/bind-users) or in the #bind
-channel of the Freenode IRC service.
-
 Report bugs to <info@isc.org>.
 BIND home page: <https://www.isc.org/downloads/BIND/>.
 _ACEOF
@@ -11907,6 +11916,131 @@ fi
 
 
 
+#
+# Use pkg-config
+#
+
+
+
+
+
+
+
+
+if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
+	if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}pkg-config", so it can be a program name with args.
+set dummy ${ac_tool_prefix}pkg-config; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_PKG_CONFIG+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $PKG_CONFIG in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_PKG_CONFIG="$PKG_CONFIG" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_PKG_CONFIG="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+PKG_CONFIG=$ac_cv_path_PKG_CONFIG
+if test -n "$PKG_CONFIG"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $PKG_CONFIG" >&5
+$as_echo "$PKG_CONFIG" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_path_PKG_CONFIG"; then
+  ac_pt_PKG_CONFIG=$PKG_CONFIG
+  # Extract the first word of "pkg-config", so it can be a program name with args.
+set dummy pkg-config; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_ac_pt_PKG_CONFIG+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $ac_pt_PKG_CONFIG in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_ac_pt_PKG_CONFIG="$ac_pt_PKG_CONFIG" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_ac_pt_PKG_CONFIG="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  ;;
+esac
+fi
+ac_pt_PKG_CONFIG=$ac_cv_path_ac_pt_PKG_CONFIG
+if test -n "$ac_pt_PKG_CONFIG"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_pt_PKG_CONFIG" >&5
+$as_echo "$ac_pt_PKG_CONFIG" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_pt_PKG_CONFIG" = x; then
+    PKG_CONFIG=""
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    PKG_CONFIG=$ac_pt_PKG_CONFIG
+  fi
+else
+  PKG_CONFIG="$ac_cv_path_PKG_CONFIG"
+fi
+
+fi
+if test -n "$PKG_CONFIG"; then
+	_pkg_min_version=0.9.0
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking pkg-config is at least version $_pkg_min_version" >&5
+$as_echo_n "checking pkg-config is at least version $_pkg_min_version... " >&6; }
+	if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+	else
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+		PKG_CONFIG=""
+	fi
+fi
+
 # Warn if the user specified libbind, which is now deprecated
 # Check whether --enable-libbind was given.
 if test "${enable_libbind+set}" = set; then :
@@ -11961,6 +12095,7 @@ yes)
 	test "${enable_fixed_rrset+set}" = set || enable_fixed_rrset=yes
 	test "${enable_querytrace+set}" = set || enable_querytrace=yes
 	test "${with_atf+set}" = set || with_atf=yes
+	test "${with_cmocka+set}" = set || with_cmocka=yes
 	test "${with_dlz_filesystem+set}" = set || with_dlz_filesystem=yes
 	test "${enable_symtable+set}" = set || enable_symtable=all
 	test "${enable_warn_error+set}" = set || enable_warn_error=yes
@@ -22395,6 +22530,204 @@ fi
 
 
 
+#
+# Check whether to build with cmocka unit testing framework
+#
+
+
+# Check whether --with-cmocka was given.
+if test "${with_cmocka+set}" = set; then :
+  withval=$with_cmocka;
+fi
+
+
+case $with_cmocka in #(
+  no) :
+    : ;; #(
+  yes) :
+
+pkg_failed=no
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for cmocka" >&5
+$as_echo_n "checking for cmocka... " >&6; }
+
+if test -n "$CMOCKA_CFLAGS"; then
+    pkg_cv_CMOCKA_CFLAGS="$CMOCKA_CFLAGS"
+ elif test -n "$PKG_CONFIG"; then
+    if test -n "$PKG_CONFIG" && \
+    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"cmocka\""; } >&5
+  ($PKG_CONFIG --exists --print-errors "cmocka") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+  pkg_cv_CMOCKA_CFLAGS=`$PKG_CONFIG --cflags "cmocka" 2>/dev/null`
+		      test "x$?" != "x0" && pkg_failed=yes
+else
+  pkg_failed=yes
+fi
+ else
+    pkg_failed=untried
+fi
+if test -n "$CMOCKA_LIBS"; then
+    pkg_cv_CMOCKA_LIBS="$CMOCKA_LIBS"
+ elif test -n "$PKG_CONFIG"; then
+    if test -n "$PKG_CONFIG" && \
+    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"cmocka\""; } >&5
+  ($PKG_CONFIG --exists --print-errors "cmocka") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+  pkg_cv_CMOCKA_LIBS=`$PKG_CONFIG --libs "cmocka" 2>/dev/null`
+		      test "x$?" != "x0" && pkg_failed=yes
+else
+  pkg_failed=yes
+fi
+ else
+    pkg_failed=untried
+fi
+
+
+
+if test $pkg_failed = yes; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+
+if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
+        _pkg_short_errors_supported=yes
+else
+        _pkg_short_errors_supported=no
+fi
+        if test $_pkg_short_errors_supported = yes; then
+	        CMOCKA_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "cmocka" 2>&1`
+        else
+	        CMOCKA_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "cmocka" 2>&1`
+        fi
+	# Put the nasty error message in config.log where it belongs
+	echo "$CMOCKA_PKG_ERRORS" >&5
+
+	as_fn_error $? "Package requirements (cmocka) were not met:
+
+$CMOCKA_PKG_ERRORS
+
+Consider adjusting the PKG_CONFIG_PATH environment variable if you
+installed software in a non-standard prefix.
+
+Alternatively, you may set the environment variables CMOCKA_CFLAGS
+and CMOCKA_LIBS to avoid the need to call pkg-config.
+See the pkg-config man page for more details." "$LINENO" 5
+elif test $pkg_failed = untried; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+	{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "The pkg-config script could not be found or is too old.  Make sure it
+is in your PATH or set the PKG_CONFIG environment variable to the full
+path to pkg-config.
+
+Alternatively, you may set the environment variables CMOCKA_CFLAGS
+and CMOCKA_LIBS to avoid the need to call pkg-config.
+See the pkg-config man page for more details.
+
+To get pkg-config, see <http://pkg-config.freedesktop.org/>.
+See \`config.log' for more details" "$LINENO" 5; }
+else
+	CMOCKA_CFLAGS=$pkg_cv_CMOCKA_CFLAGS
+	CMOCKA_LIBS=$pkg_cv_CMOCKA_LIBS
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+
+fi ;; #(
+  *) :
+
+	    save_CFLAGS="$CFLAGS"
+	    save_LIBS="$LIBS"
+	    CFLAGS="$CFLAGS -I$with_cmocka/include"
+	    LIBS="$LIBS -L$with_cmocka/lib"
+	    for ac_header in cmocka.h
+do :
+  ac_fn_c_check_header_compile "$LINENO" "cmocka.h" "ac_cv_header_cmocka_h" "#include <stdarg.h>
+			      #include <stddef.h>
+			      #include <setjmp.h>
+
+"
+if test "x$ac_cv_header_cmocka_h" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_CMOCKA_H 1
+_ACEOF
+ :
+else
+  as_fn_error $? "cmocka.h not found" "$LINENO" 5
+fi
+
+done
+
+	    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing cmocka_run_group_tests" >&5
+$as_echo_n "checking for library containing cmocka_run_group_tests... " >&6; }
+if ${ac_cv_search_cmocka_run_group_tests+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_func_search_save_LIBS=$LIBS
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char cmocka_run_group_tests ();
+int
+main ()
+{
+return cmocka_run_group_tests ();
+  ;
+  return 0;
+}
+_ACEOF
+for ac_lib in '' cmocka; do
+  if test -z "$ac_lib"; then
+    ac_res="none required"
+  else
+    ac_res=-l$ac_lib
+    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+  fi
+  if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_search_cmocka_run_group_tests=$ac_res
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext
+  if ${ac_cv_search_cmocka_run_group_tests+:} false; then :
+  break
+fi
+done
+if ${ac_cv_search_cmocka_run_group_tests+:} false; then :
+
+else
+  ac_cv_search_cmocka_run_group_tests=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_cmocka_run_group_tests" >&5
+$as_echo "$ac_cv_search_cmocka_run_group_tests" >&6; }
+ac_res=$ac_cv_search_cmocka_run_group_tests
+if test "$ac_res" != no; then :
+  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+
+			       CMOCKA_CFLAGS="-Iwith_cmocka/include"
+			       CMOCKA_LIBS="-L$with_cmocka/lib -lcmocka"
+
+else
+  as_fn_error $? "cmocka unit testing framework not found in $with_cmocka path" "$LINENO" 5
+fi
+
+	     ;; #(
+  *) :
+     ;;
+esac
+
+
+
 #
 # Check whether to build Automated Test Framework unit tests
 #
diff --git a/configure.in b/configure.in
index 4e39cbdc54..e0b8e87af9 100644
--- a/configure.in
+++ b/configure.in
@@ -40,6 +40,12 @@ AC_SUBST(CCOPT)
 AC_SUBST(CCNOOPT)
 AC_SUBST(BACKTRACECFLAGS)
 
+#
+# Use pkg-config
+#
+
+PKG_PROG_PKG_CONFIG
+
 # Warn if the user specified libbind, which is now deprecated
 AC_ARG_ENABLE(libbind, AS_HELP_STRING([--enable-libbind], [deprecated]))
 
@@ -81,6 +87,7 @@ yes)
 	test "${enable_fixed_rrset+set}" = set || enable_fixed_rrset=yes
 	test "${enable_querytrace+set}" = set || enable_querytrace=yes
 	test "${with_atf+set}" = set || with_atf=yes
+	test "${with_cmocka+set}" = set || with_cmocka=yes
 	test "${with_dlz_filesystem+set}" = set || with_dlz_filesystem=yes
 	test "${enable_symtable+set}" = set || enable_symtable=all
 	test "${enable_warn_error+set}" = set || enable_warn_error=yes
@@ -4434,7 +4441,7 @@ AC_SUBST(CURL)
 # empty).  The variable VARIABLE will be substituted into output files.
 # 
 
-AC_DEFUN(NOM_PATH_FILE, [
+AC_DEFUN([NOM_PATH_FILE], [
 $1=""
 AC_MSG_CHECKING(for $2)
 for d in $3
@@ -4539,6 +4546,39 @@ AS_IF([test "$use_libidn2" != "no"],
 AC_SUBST([LIBIDN2_CFLAGS])
 AC_SUBST([LIBIDN2_LIBS])
 
+#
+# Check whether to build with cmocka unit testing framework
+#
+
+AC_ARG_WITH([cmocka],
+	    [AS_HELP_STRING([--with-cmocka=no],[enable cmocka based tests (default is no)])])
+
+AS_CASE([$with_cmocka],
+	[no],[:],
+	[yes],[PKG_CHECK_MODULES([CMOCKA], [cmocka])],
+	[*],[
+	    save_CFLAGS="$CFLAGS"
+	    save_LIBS="$LIBS"
+	    CFLAGS="$CFLAGS -I$with_cmocka/include"
+	    LIBS="$LIBS -L$with_cmocka/lib"
+	    AC_CHECK_HEADERS([cmocka.h],
+			     [:],
+			     [AC_MSG_ERROR([cmocka.h not found])],
+			     [#include <stdarg.h>
+			      #include <stddef.h>
+			      #include <setjmp.h>
+			     ])
+	    AC_SEARCH_LIBS([cmocka_run_group_tests],
+			   [cmocka],
+			   [
+			       CMOCKA_CFLAGS="-Iwith_cmocka/include"
+			       CMOCKA_LIBS="-L$with_cmocka/lib -lcmocka"
+			   ],
+			   [AC_MSG_ERROR([cmocka unit testing framework not found in $with_cmocka path])])
+	    ])
+AC_SUBST([CMOCKA_CFLAGS])
+AC_SUBST([CMOCKA_LIBS])
+
 #
 # Check whether to build Automated Test Framework unit tests
 #
diff --git a/contrib/dlz/config.dlz.in b/contrib/dlz/config.dlz.in
index 47525af85b..5ddde180b7 100644
--- a/contrib/dlz/config.dlz.in
+++ b/contrib/dlz/config.dlz.in
@@ -28,7 +28,7 @@ dlzdir='${DLZ_DRIVER_DIR}'
 #   INCLUDES is any necessary include definitions
 #   LIBS is any necessary library definitions
 #
-AC_DEFUN(DLZ_ADD_DRIVER, [
+AC_DEFUN([DLZ_ADD_DRIVER], [
 	CONTRIB_DLZ="$CONTRIB_DLZ -DDLZ_$1"
 	for i in $2
 	do
diff --git a/lib/isc/tests/Makefile.in b/lib/isc/tests/Makefile.in
index 58b3e4f4a6..5a1925038c 100644
--- a/lib/isc/tests/Makefile.in
+++ b/lib/isc/tests/Makefile.in
@@ -27,6 +27,9 @@ ISCDEPLIBS =	../libisc.@A@
 
 LIBS =		@LIBS@ @ATFLIBS@
 
+CMOCKA_CFLAGS =	@CMOCKA_CFLAGS@
+CMOCKA_LIBS =	@CMOCKA_LIBS@
+
 OBJS =		isctest.@O@
 SRCS =		isctest.c aes_test.c atomic_test.c buffer_test.c \
 		counter_test.c errno_test.c file_test.c hash_test.c \