diff --git a/CHANGES b/CHANGES
index 27698afb5e..3ee9755dbc 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,6 @@
+3858.	[bug]		Disable GCC 4.9 "delete null pointer check".
+			[RT #35968]
+
 3857.	[bug]		Make it harder for a incorrect NOEDNS classification
 			to be made. [RT #36020]
 
diff --git a/configure b/configure
index bcd3d18ffd..f094c6e315 100755
--- a/configure
+++ b/configure
@@ -16566,9 +16566,10 @@ MKDEPCFLAGS="-M"
 IRIX_DNSSEC_WARNINGS_HACK=""
 
 if test "X$GCC" = "Xyes"; then
+	STD_CWARNINGS="$STD_CWARNINGS -W -Wall -Wmissing-prototypes -Wcast-qual -Wwrite-strings -Wformat -Wpointer-arith"
 	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if \"$CC\" supports -fno-strict-aliasing" >&5
 $as_echo_n "checking if \"$CC\" supports -fno-strict-aliasing... " >&6; }
-	SAVE_CFLAGS=$CFLAGS
+	SAVE_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS -fno-strict-aliasing"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -16587,15 +16588,47 @@ else
   FNOSTRICTALIASING=no
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-	CFLAGS=$SAVE_CFLAGS
+	CFLAGS="$SAVE_CFLAGS"
 	if test "$FNOSTRICTALIASING" = "yes"; then
 		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 $as_echo "yes" >&6; }
-	STD_CWARNINGS="$STD_CWARNINGS -W -Wall -Wmissing-prototypes -Wcast-qual -Wwrite-strings -Wformat -Wpointer-arith -fno-strict-aliasing"
+		STD_CWARNINGS="$STD_CWARNINGS -fno-strict-aliasing"
+	else
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+	fi
+	#
+	# turn off delete null pointer checks
+	#
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if \"$CC\" supports -fno-delete-null-pointer-checks" >&5
+$as_echo_n "checking if \"$CC\" supports -fno-delete-null-pointer-checks... " >&6; }
+	SAVE_CFLAGS="$CFLAGS"
+	CFLAGS="$CFLAGS -fno-delete-null-pointer-checks"
+	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  FNODELETENULLPOINTERCHECKS=yes
+else
+  FNODELETENULLPOINTERCHECKS=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+	CFLAGS="$SAVE_CFLAGS"
+	if test "$FNODELETENULLPOINTERCHECKS" = "yes"; then
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+		STD_CWARNINGS="$STD_CWARNINGS -fno-delete-null-pointer-checks"
 	else
 		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
-	STD_CWARNINGS="$STD_CWARNINGS -W -Wall -Wmissing-prototypes -Wcast-qual -Wwrite-strings -Wformat -Wpointer-arith"
 	fi
 	case "$host" in
 	*-hp-hpux*)
diff --git a/configure.in b/configure.in
index db42581374..046996b142 100644
--- a/configure.in
+++ b/configure.in
@@ -2146,17 +2146,32 @@ MKDEPCFLAGS="-M"
 IRIX_DNSSEC_WARNINGS_HACK=""
 
 if test "X$GCC" = "Xyes"; then
+	STD_CWARNINGS="$STD_CWARNINGS -W -Wall -Wmissing-prototypes -Wcast-qual -Wwrite-strings -Wformat -Wpointer-arith"
 	AC_MSG_CHECKING(if "$CC" supports -fno-strict-aliasing)
-	SAVE_CFLAGS=$CFLAGS
+	SAVE_CFLAGS="$CFLAGS"
 	CFLAGS="$CFLAGS -fno-strict-aliasing"
 	AC_TRY_COMPILE(,, [FNOSTRICTALIASING=yes],[FNOSTRICTALIASING=no])
-	CFLAGS=$SAVE_CFLAGS
+	CFLAGS="$SAVE_CFLAGS"
 	if test "$FNOSTRICTALIASING" = "yes"; then
 		AC_MSG_RESULT(yes)
-	STD_CWARNINGS="$STD_CWARNINGS -W -Wall -Wmissing-prototypes -Wcast-qual -Wwrite-strings -Wformat -Wpointer-arith -fno-strict-aliasing"
+		STD_CWARNINGS="$STD_CWARNINGS -fno-strict-aliasing"
+	else
+		AC_MSG_RESULT(no)
+	fi
+	#
+	# turn off delete null pointer checks
+	#
+	AC_MSG_CHECKING(if "$CC" supports -fno-delete-null-pointer-checks)
+	SAVE_CFLAGS="$CFLAGS"
+	CFLAGS="$CFLAGS -fno-delete-null-pointer-checks"
+	AC_TRY_COMPILE(,, [FNODELETENULLPOINTERCHECKS=yes],
+			  [FNODELETENULLPOINTERCHECKS=no])
+	CFLAGS="$SAVE_CFLAGS"
+	if test "$FNODELETENULLPOINTERCHECKS" = "yes"; then
+		AC_MSG_RESULT(yes)
+		STD_CWARNINGS="$STD_CWARNINGS -fno-delete-null-pointer-checks"
 	else
 		AC_MSG_RESULT(no)
-	STD_CWARNINGS="$STD_CWARNINGS -W -Wall -Wmissing-prototypes -Wcast-qual -Wwrite-strings -Wformat -Wpointer-arith"
 	fi
 	case "$host" in
 	*-hp-hpux*)