diff --git a/configure b/configure
index f72da90..39c92e9 100755
--- a/configure
+++ b/configure
@@ -2278,6 +2278,97 @@
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
 
 } # ac_fn_cxx_check_func
+
+# ac_fn_cxx_check_header_mongrel LINENO HEADER VAR INCLUDES
+# ---------------------------------------------------------
+# Tests whether HEADER exists, giving a warning if it cannot be compiled using
+# the include files in INCLUDES and setting the cache variable VAR
+# accordingly.
+ac_fn_cxx_check_header_mongrel ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  if eval \${$3+:} false; then :
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+$as_echo_n "checking for $2... " >&6; }
+if eval \${$3+:} false; then :
+  $as_echo_n "(cached) " >&6
+fi
+eval ac_res=\$$3
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+else
+  # Is the header compilable?
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking $2 usability" >&5
+$as_echo_n "checking $2 usability... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$4
+#include <$2>
+_ACEOF
+if ac_fn_cxx_try_compile "$LINENO"; then :
+  ac_header_compiler=yes
+else
+  ac_header_compiler=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_header_compiler" >&5
+$as_echo "$ac_header_compiler" >&6; }
+
+# Is the header present?
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking $2 presence" >&5
+$as_echo_n "checking $2 presence... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <$2>
+_ACEOF
+if ac_fn_cxx_try_cpp "$LINENO"; then :
+  ac_header_preproc=yes
+else
+  ac_header_preproc=no
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_header_preproc" >&5
+$as_echo "$ac_header_preproc" >&6; }
+
+# So?  What about this header?
+case $ac_header_compiler:$ac_header_preproc:$ac_cxx_preproc_warn_flag in #((
+  yes:no: )
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: accepted by the compiler, rejected by the preprocessor!" >&5
+$as_echo "$as_me: WARNING: $2: accepted by the compiler, rejected by the preprocessor!" >&2;}
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: proceeding with the compiler's result" >&5
+$as_echo "$as_me: WARNING: $2: proceeding with the compiler's result" >&2;}
+    ;;
+  no:yes:* )
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: present but cannot be compiled" >&5
+$as_echo "$as_me: WARNING: $2: present but cannot be compiled" >&2;}
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2:     check for missing prerequisite headers?" >&5
+$as_echo "$as_me: WARNING: $2:     check for missing prerequisite headers?" >&2;}
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: see the Autoconf documentation" >&5
+$as_echo "$as_me: WARNING: $2: see the Autoconf documentation" >&2;}
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2:     section \"Present But Cannot Be Compiled\"" >&5
+$as_echo "$as_me: WARNING: $2:     section \"Present But Cannot Be Compiled\"" >&2;}
+    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: proceeding with the compiler's result" >&5
+$as_echo "$as_me: WARNING: $2: proceeding with the compiler's result" >&2;}
+( $as_echo "## ---------------------------------------- ##
+## Report this to ndn-lib@lists.cs.ucla.edu ##
+## ---------------------------------------- ##"
+     ) | sed "s/^/$as_me: WARNING:     /" >&2
+    ;;
+esac
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
+$as_echo_n "checking for $2... " >&6; }
+if eval \${$3+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  eval "$3=\$ac_header_compiler"
+fi
+eval ac_res=\$$3
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+fi
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+
+} # ac_fn_cxx_check_header_mongrel
 cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
@@ -16150,36 +16241,69 @@
 ;;
   esac
 
-for ac_func in memcmp
+for ac_func in memcmp memcpy memset
 do :
-  ac_fn_cxx_check_func "$LINENO" "memcmp" "ac_cv_func_memcmp"
-if test "x$ac_cv_func_memcmp" = xyes; then :
+  as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
+ac_fn_cxx_check_func "$LINENO" "$ac_func" "$as_ac_var"
+if eval test \"x\$"$as_ac_var"\" = x"yes"; then :
   cat >>confdefs.h <<_ACEOF
-#define HAVE_MEMCMP 1
+#define `$as_echo "HAVE_$ac_func" | $as_tr_cpp` 1
 _ACEOF
 
 fi
 done
 
-for ac_func in memcpy
+for ac_func in strchr
 do :
-  ac_fn_cxx_check_func "$LINENO" "memcpy" "ac_cv_func_memcpy"
-if test "x$ac_cv_func_memcpy" = xyes; then :
+  ac_fn_cxx_check_func "$LINENO" "strchr" "ac_cv_func_strchr"
+if test "x$ac_cv_func_strchr" = xyes; then :
   cat >>confdefs.h <<_ACEOF
-#define HAVE_MEMCPY 1
+#define HAVE_STRCHR 1
 _ACEOF
-
+ :
+else
+  as_fn_error $? "*** strchr not found. Check 'config.log' for more details." "$LINENO" 5
 fi
 done
 
-for ac_func in memset
+for ac_func in sscanf
 do :
-  ac_fn_cxx_check_func "$LINENO" "memset" "ac_cv_func_memset"
-if test "x$ac_cv_func_memset" = xyes; then :
+  ac_fn_cxx_check_func "$LINENO" "sscanf" "ac_cv_func_sscanf"
+if test "x$ac_cv_func_sscanf" = xyes; then :
   cat >>confdefs.h <<_ACEOF
-#define HAVE_MEMSET 1
+#define HAVE_SSCANF 1
 _ACEOF
+ :
+else
+  as_fn_error $? "*** sscanf not found. Check 'config.log' for more details." "$LINENO" 5
+fi
+done
 
+
+for ac_header in sys/time.h
+do :
+  ac_fn_cxx_check_header_mongrel "$LINENO" "sys/time.h" "ac_cv_header_sys_time_h" "$ac_includes_default"
+if test "x$ac_cv_header_sys_time_h" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_SYS_TIME_H 1
+_ACEOF
+ :
+else
+  as_fn_error $? "*** sys/time.h not found. Check 'config.log' for more details." "$LINENO" 5
+fi
+
+done
+
+for ac_func in gettimeofday
+do :
+  ac_fn_cxx_check_func "$LINENO" "gettimeofday" "ac_cv_func_gettimeofday"
+if test "x$ac_cv_func_gettimeofday" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_GETTIMEOFDAY 1
+_ACEOF
+ :
+else
+  as_fn_error $? "*** gettimeofday not found. processEvents requires it. Check 'config.log' for more details." "$LINENO" 5
 fi
 done
 
@@ -16546,6 +16670,48 @@
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for gmtime support" >&5
+$as_echo_n "checking for gmtime support... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <sys/time.h>
+    struct timeval tv;
+    int result1 = gettimeofday(&tv, 0);
+    time_t time1 = time(0);
+    struct tm* tm1 = gmtime(&time1);
+    time_t time2 = timegm(tm1);
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+
+_ACEOF
+if ac_fn_cxx_try_compile "$LINENO"; then :
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_GMTIME_SUPPORT 1
+_ACEOF
+
+
+else
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_GMTIME_SUPPORT 0
+_ACEOF
+
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
 # Require libcrypto.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for EVP_EncryptInit in -lcrypto" >&5
 $as_echo_n "checking for EVP_EncryptInit in -lcrypto... " >&6; }