--- ./configure	2013-11-01 09:33:32.000000000 +1000
+++ ./configure	2014-02-08 09:28:06.063248544 +1000
@@ -6840,6 +6840,26 @@
 	DEFAULT_SUPP="glibc-2.34567-NPTL-helgrind.supp ${DEFAULT_SUPP}"
 	DEFAULT_SUPP="glibc-2.X-drd.supp ${DEFAULT_SUPP}"
 	;;
+     2.20)
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: 2.20 family" >&5
+$as_echo "2.20 family" >&6; }
+
+$as_echo "#define GLIBC_2_20 1" >>confdefs.h
+
+	DEFAULT_SUPP="glibc-2.X.supp ${DEFAULT_SUPP}"
+	DEFAULT_SUPP="glibc-2.34567-NPTL-helgrind.supp ${DEFAULT_SUPP}"
+	DEFAULT_SUPP="glibc-2.X-drd.supp ${DEFAULT_SUPP}"
+	;;
+     2.21)
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: 2.21 family" >&5
+$as_echo "2.21 family" >&6; }
+
+$as_echo "#define GLIBC_2_21 1" >>confdefs.h
+
+	DEFAULT_SUPP="glibc-2.X.supp ${DEFAULT_SUPP}"
+	DEFAULT_SUPP="glibc-2.34567-NPTL-helgrind.supp ${DEFAULT_SUPP}"
+	DEFAULT_SUPP="glibc-2.X-drd.supp ${DEFAULT_SUPP}"
+	;;
      darwin)
 	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: Darwin" >&5
 $as_echo "Darwin" >&6; }
--- ./configure.ac	2013-11-01 09:28:16.000000000 +1000
+++ ./configure.ac	2014-02-08 09:27:38.870385366 +1000
@@ -1018,6 +1018,20 @@
 	DEFAULT_SUPP="glibc-2.34567-NPTL-helgrind.supp ${DEFAULT_SUPP}"
 	DEFAULT_SUPP="glibc-2.X-drd.supp ${DEFAULT_SUPP}"
 	;;
+     2.20)
+	AC_MSG_RESULT(2.20 family)
+	AC_DEFINE([GLIBC_2_20], 1, [Define to 1 if you're using glibc 2.20.x])
+	DEFAULT_SUPP="glibc-2.X.supp ${DEFAULT_SUPP}"
+	DEFAULT_SUPP="glibc-2.34567-NPTL-helgrind.supp ${DEFAULT_SUPP}"
+	DEFAULT_SUPP="glibc-2.X-drd.supp ${DEFAULT_SUPP}"
+	;;
+     2.21)
+	AC_MSG_RESULT(2.21 family)
+	AC_DEFINE([GLIBC_2_21], 1, [Define to 1 if you're using glibc 2.21.x])
+	DEFAULT_SUPP="glibc-2.X.supp ${DEFAULT_SUPP}"
+	DEFAULT_SUPP="glibc-2.34567-NPTL-helgrind.supp ${DEFAULT_SUPP}"
+	DEFAULT_SUPP="glibc-2.X-drd.supp ${DEFAULT_SUPP}"
+	;;
      darwin)
 	AC_MSG_RESULT(Darwin)
 	AC_DEFINE([DARWIN_LIBC], 1, [Define to 1 if you're using Darwin])