Re: [Bug-tar] [PATCH] Do not fail when 'compress' is unable to provide sufficient compress ratio

[Paul Eggert]

I suggest something simpler: namely, just declare that the
-Z (compress) program must conform to the compress API,
so that its exit status 2 really means OK.  That way,
we can change only src/system.c and NEWS.  The compress API
is obsolete and isn't likely to change so this sounds safe.