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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.

Signed-off-by: Ming Liu <peter.x.liu@external.atlascopco.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Ming Liu 2017-06-02 10:47:23 +02:00 committed by Denys Vlasenko
parent 192dce4b84
commit 978307f8a1
1 changed files with 15 additions and 10 deletions
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25
archival/tar.c
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@ -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 */