Patch from Dennis Vlasenko to add the option to compress help text.
diff --git a/archival/libunarchive/Makefile.in b/archival/libunarchive/Makefile.in
index 9bb9156..928e5bf 100644
--- a/archival/libunarchive/Makefile.in
+++ b/archival/libunarchive/Makefile.in
@@ -67,6 +67,7 @@
 LIBUNARCHIVE-$(CONFIG_FEATURE_TAR_COMPRESS) += decompress_uncompress.o
 LIBUNARCHIVE-$(CONFIG_UNCOMPRESS) += decompress_uncompress.o
 LIBUNARCHIVE-$(CONFIG_UNZIP) += $(GUNZIP_FILES)
+LIBUNARCHIVE-$(CONFIG_FEATURE_COMPRESS_USAGE) += decompress_bunzip2.o
 
 
 LIBUNARCHIVE-y:=$(sort $(LIBUNARCHIVE-y))