busybox: fix a linking issue

A following linking error was observed:
| ==========
| archival/lib.a(tar.o): In function `tar_main':
| archival/tar.c:1168: undefined reference to `unpack_Z_stream'
| archival/tar.c:1168: undefined reference to `unpack_Z_stream'
| ld: busybox_unstripped: hidden symbol `unpack_Z_stream' isn't defined
| ld: final link failed: Bad value

this happened with clang compiler, with the following configs:
| CONFIG_TAR=y
| # CONFIG_FEATURE_SEAMLESS_Z is not set

which can be fixed by adding IF_FEATURE_* checks in.

(From OE-Core rev: 789254b5ae983a94346f53de18286713b80eb5f2)

Signed-off-by: Ming Liu <peter.x.liu@external.atlascopco.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 71 insertions, 0 deletions

diff --git a/meta/recipes-core/busybox/busybox/busybox-tar-add-IF_FEATURE_-checks.patch b/meta/recipes-core/busybox/busybox/busybox-tar-add-IF_FEATURE_-checks.patch
new file mode 100644
index 0000000000..0c3c9c0f42
--- /dev/null
+++ b/meta/recipes-core/busybox/busybox/busybox-tar-add-IF_FEATURE_-checks.patch
@@ -0,0 +1,70 @@
+From f94412f6bb49136694c5478d0aecb19118d1b08d Mon Sep 17 00:00:00 2001
+From: Ming Liu <peter.x.liu@external.atlascopco.com>
+Date: Wed, 31 May 2017 11:48:09 +0200
+Subject: [PATCH] tar: add IF_FEATURE_* checks
+
+A following linking error was observed:
+| ==========
+| archival/lib.a(tar.o): In function `tar_main':
+| archival/tar.c:1168: undefined reference to `unpack_Z_stream'
+| archival/tar.c:1168: undefined reference to `unpack_Z_stream'
+| ld: busybox_unstripped: hidden symbol `unpack_Z_stream' isn't defined
+| ld: final link failed: Bad value
+
+this happened with clang compiler, with the following configs:
+| CONFIG_TAR=y
+| # CONFIG_FEATURE_SEAMLESS_Z is not set
+
+which can be fixed by adding IF_FEATURE_* checks in.
+
+Upstream-Status: Pending [ Sent to busybox upstream on 2017-06-02 ]
+
+Signed-off-by: Ming Liu <peter.x.liu@external.atlascopco.com>
+---
+ archival/tar.c | 25 +++++++++++++++----------
+ 1 file changed, 15 insertions(+), 10 deletions(-)
+
+diff --git a/archival/tar.c b/archival/tar.c
+index b70e00a..7598b71 100644
+--- a/archival/tar.c
++++ b/archival/tar.c
+@@ -1216,21 +1216,26 @@ int tar_main(int argc UNUSED_PARAM, char **argv)
+                USE_FOR_MMU(IF_DESKTOP(long long) int FAST_FUNC (*xformer)(transformer_state_t *xstate);)
+                USE_FOR_NOMMU(const char *xformer_prog;)
+ 
+-               if (opt & OPT_COMPRESS)
+-                       USE_FOR_MMU(xformer = unpack_Z_stream;)
++               if (opt & OPT_COMPRESS) {
++                       USE_FOR_MMU(IF_FEATURE_SEAMLESS_Z(xformer = unpack_Z_stream;))
+                        USE_FOR_NOMMU(xformer_prog = "uncompress";)
+-               if (opt & OPT_GZIP)
+-                       USE_FOR_MMU(xformer = unpack_gz_stream;)
++               }
++               if (opt & OPT_GZIP) {
++                       USE_FOR_MMU(IF_FEATURE_SEAMLESS_GZ(xformer = unpack_gz_stream;))
+                        USE_FOR_NOMMU(xformer_prog = "gunzip";)
+-               if (opt & OPT_BZIP2)
+-                       USE_FOR_MMU(xformer = unpack_bz2_stream;)
++               }
++               if (opt & OPT_BZIP2) {
++                       USE_FOR_MMU(IF_FEATURE_SEAMLESS_BZ2(xformer = unpack_bz2_stream;))
+                        USE_FOR_NOMMU(xformer_prog = "bunzip2";)
+-               if (opt & OPT_LZMA)
+-                       USE_FOR_MMU(xformer = unpack_lzma_stream;)
++               }
++               if (opt & OPT_LZMA) {
++                       USE_FOR_MMU(IF_FEATURE_SEAMLESS_LZMA(xformer = unpack_lzma_stream;))
+                        USE_FOR_NOMMU(xformer_prog = "unlzma";)
+-               if (opt & OPT_XZ)
+-                       USE_FOR_MMU(xformer = unpack_xz_stream;)
++               }
++               if (opt & OPT_XZ) {
++                       USE_FOR_MMU(IF_FEATURE_SEAMLESS_XZ(xformer = unpack_xz_stream;))
+                        USE_FOR_NOMMU(xformer_prog = "unxz";)
++               }
+ 
+                fork_transformer_with_sig(tar_handle->src_fd, xformer, xformer_prog);
+                /* Can't lseek over pipes */
+-- 
+2.7.4
+
diff --git a/meta/recipes-core/busybox/busybox_1.24.1.bb b/meta/recipes-core/busybox/busybox_1.24.1.bb
index 1baadeacd7..d3df448557 100644
--- a/meta/recipes-core/busybox/busybox_1.24.1.bb
+++ b/meta/recipes-core/busybox/busybox_1.24.1.bb
@@ -58,6 +58,7 @@ SRC_URI = "http://www.busybox.net/downloads/busybox-${PV}.tar.bz2;name=tarball \
            file://0001-libiproute-handle-table-ids-larger-than-255.patch \
            file://ifupdown-pass-interface-device-name-for-ipv6-route-c.patch \
            file://BUG9071_buffer_overflow_arp.patch \
+           file://busybox-tar-add-IF_FEATURE_-checks.patch \
 "
 SRC_URI_append_libc-musl = " file://musl.cfg "