Use AT_GZIP_PREREQ

tests/gzip.at

@@ -26,6 +26,7 @@ AT_KEYWORDS([gzip])
 unset TAR_OPTIONS
 
 AT_CHECK([
+AT_GZIP_PREREQ
 tar xfvz /dev/null
 test $? = 2 || exit 1
 ],
@@ -38,4 +39,4 @@ tar: Error exit delayed from previous errors
 ],
 [],[])
 
-AT_CLEANUP
+AT_CLEANUP

tests/star/pax-big-10g.at

@@ -24,6 +24,7 @@ AT_KEYWORDS([pax-big-10g])
 unset TAR_OPTIONS
 
 AT_CHECK([
+AT_GZIP_PREREQ([bzip2])
 AT_STAR_PREREQ([pax-big-10g.tar.bz2])
 
 tar --utc -tvjf $STAR_TESTSCRIPTS/pax-big-10g.tar.bz2

tests/star/ustar-big-2g.at

@@ -24,6 +24,7 @@ AT_KEYWORDS([ustar-big-2g])
 unset TAR_OPTIONS
 
 AT_CHECK([
+AT_GZIP_PREREQ([bzip2])
 AT_STAR_PREREQ([ustar-big-2g.tar.bz2])
 
 tar --utc -tvjf $STAR_TESTSCRIPTS/ustar-big-2g.tar.bz2

tests/star/ustar-big-8g.at

@@ -24,6 +24,7 @@ AT_KEYWORDS([ustar-big-8g])
 unset TAR_OPTIONS
 
 AT_CHECK([
+AT_GZIP_PREREQ([bzip2])
 AT_STAR_PREREQ([ustar-big-8g.tar.bz2])
 
 tar --utc -tvjf $STAR_TESTSCRIPTS/ustar-big-8g.tar.bz2