only build common libarchive objs when needed
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/archival/libunarchive/Kbuild b/archival/libunarchive/Kbuild
index 364f917..4bb81ce 100644
--- a/archival/libunarchive/Kbuild
+++ b/archival/libunarchive/Kbuild
@@ -4,7 +4,9 @@
#
# Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
-lib-y:= \
+lib-y:=
+
+COMMON_FILES:= \
\
data_skip.o \
data_extract_all.o \
@@ -49,3 +51,7 @@
lib-$(CONFIG_FEATURE_SEAMLESS_BZ2) += open_transformer.o decompress_bunzip2.o get_header_tar_bz2.o
lib-$(CONFIG_FEATURE_SEAMLESS_LZMA) += open_transformer.o decompress_unlzma.o get_header_tar_lzma.o
lib-$(CONFIG_FEATURE_COMPRESS_USAGE) += decompress_bunzip2.o
+
+ifneq ($(lib-y),)
+lib-y += $(COMMON_FILES)
+endif