Isolate code better for unused options, config option to enable long
options, add some conditions to the tar tests in testsuite.
diff --git a/testsuite/tar/tar-handles-cz-options b/testsuite/tar/tar-handles-cz-options
index 1049c6d..5b55e46 100644
--- a/testsuite/tar/tar-handles-cz-options
+++ b/testsuite/tar/tar-handles-cz-options
@@ -1,3 +1,5 @@
+# FEATURE: CONFIG_FEATURE_TAR_CREATE
+# FEATURE: CONFIG_FEATURE_TAR_GZIP
 touch foo
 busybox tar czf foo.tar.gz foo
 gzip -d foo.tar.gz
diff --git a/testsuite/tar/tar-handles-empty-include-and-non-empty-exclude-list b/testsuite/tar/tar-handles-empty-include-and-non-empty-exclude-list
index b76f023..5033642 100644
--- a/testsuite/tar/tar-handles-empty-include-and-non-empty-exclude-list
+++ b/testsuite/tar/tar-handles-empty-include-and-non-empty-exclude-list
@@ -1,4 +1,5 @@
-# FEATURE: CONFIG_FEATURE_TAR_EXCLUDE
+# FEATURE: CONFIG_FEATURE_TAR_FROM
+# FEATURE: CONFIG_FEATURE_TAR_CREATE
 touch foo
 tar cf foo.tar foo
 echo foo >foo.exclude
diff --git a/testsuite/tar/tar-handles-exclude-and-extract-lists b/testsuite/tar/tar-handles-exclude-and-extract-lists
index e715a47..2de0f0e 100644
--- a/testsuite/tar/tar-handles-exclude-and-extract-lists
+++ b/testsuite/tar/tar-handles-exclude-and-extract-lists
@@ -1,4 +1,5 @@
-# FEATURE: CONFIG_FEATURE_TAR_EXCLUDE
+# FEATURE: CONFIG_FEATURE_TAR_FROM
+# FEATURE: CONFIG_FEATURE_TAR_CREATE
 touch foo bar baz
 tar cf foo.tar foo bar baz
 echo foo >foo.exclude
diff --git a/testsuite/tar/tar-handles-multiple-X-options b/testsuite/tar/tar-handles-multiple-X-options
index 8321af8..155b27e 100644
--- a/testsuite/tar/tar-handles-multiple-X-options
+++ b/testsuite/tar/tar-handles-multiple-X-options
@@ -1,3 +1,5 @@
+# FEATURE: CONFIG_FEATURE_TAR_FROM
+# FEATURE: CONFIG_FEATURE_TAR_CREATE
 touch foo
 touch bar
 tar cf foo.tar foo bar
diff --git a/testsuite/tar/tar-handles-nested-exclude b/testsuite/tar/tar-handles-nested-exclude
index ad39506..39013a1 100644
--- a/testsuite/tar/tar-handles-nested-exclude
+++ b/testsuite/tar/tar-handles-nested-exclude
@@ -1,4 +1,5 @@
-# FEATURE: CONFIG_FEATURE_TAR_EXCLUDE
+# FEATURE: CONFIG_FEATURE_TAR_FROM
+# FEATURE: CONFIG_FEATURE_TAR_CREATE
 mkdir foo
 touch foo/bar
 tar cf foo.tar foo