diff -Nru pdns-4.2.1/debian/changelog pdns-4.2.1/debian/changelog
--- pdns-4.2.1/debian/changelog	2019-12-02 22:47:13.000000000 +0000
+++ pdns-4.2.1/debian/changelog	2019-12-07 06:30:25.000000000 +0000
@@ -1,3 +1,10 @@
+pdns (4.2.1-1+rpi1) bullseye-staging; urgency=medium
+
+  [changes brought forward from 4.1.0-1+rpi1 by Peter Michael Green <plugwash@raspbian.org> at Sun, 31 Dec 2017 14:27:56 +0000]
+  * Add -latomic to ldflags.
+
+ -- Raspbian forward porter <root@raspbian.org>  Sat, 07 Dec 2019 06:30:25 +0000
+
 pdns (4.2.1-1) unstable; urgency=medium
 
   * New upstream version 4.2.1
diff -Nru pdns-4.2.1/debian/rules pdns-4.2.1/debian/rules
--- pdns-4.2.1/debian/rules	2019-12-02 22:47:13.000000000 +0000
+++ pdns-4.2.1/debian/rules	2019-12-07 06:30:25.000000000 +0000
@@ -8,6 +8,7 @@
 
 # Vendor and version
 CXXFLAGS += -DPACKAGEVERSION='"$(DEB_VERSION).$(DEB_VENDOR)"'
+LDFLAGS += -latomic
 
 # Disable systemd integration on non-linux archs
 ifeq ($(DEB_HOST_ARCH_OS),linux)