diff -Nru sentencepiece-0.1.94/debian/changelog sentencepiece-0.1.94/debian/changelog
--- sentencepiece-0.1.94/debian/changelog	2020-10-28 12:02:07.000000000 +0000
+++ sentencepiece-0.1.94/debian/changelog	2020-12-13 09:25:55.000000000 +0000
@@ -1,3 +1,11 @@
+sentencepiece (0.1.94-1+rpi1) bullseye-staging; urgency=medium
+
+  * Apply patch by Adrian Bunk to link with libatomic on some architectures.
+    (see debian bug 977235)
+  * Link with libatomic on armhf too.
+
+ -- Peter Michael Green <plugwash@raspbian.org>  Sun, 13 Dec 2020 09:25:55 +0000
+
 sentencepiece (0.1.94-1) unstable; urgency=medium
 
   * New upstream version 0.1.94
diff -Nru sentencepiece-0.1.94/debian/rules sentencepiece-0.1.94/debian/rules
--- sentencepiece-0.1.94/debian/rules	2020-10-25 10:55:16.000000000 +0000
+++ sentencepiece-0.1.94/debian/rules	2020-12-13 09:25:55.000000000 +0000
@@ -12,6 +12,9 @@
 DPKG_EXPORT_BUILDFLAGS = 1
 include /usr/share/dpkg/buildflags.mk
 
+ifneq (,$(filter $(DEB_HOST_ARCH), armel armhf mipsel m68k powerpc sh4))
+  export DEB_LDFLAGS_MAINT_APPEND += -Wl,--no-as-needed -latomic -Wl,--as-needed
+endif
 
 %:
 	dh $@ --with python3 --buildsystem=cmake