See https://savannah.gnu.org/patch/index.php?8252. Patch provided by Anthony G. Basile. * acinclude.m4 (TAR_HEADERS_ATTR_XATTR_H): Look for <sys/xattr.h> first and then for <attr/xattr.h>. Link against libattr.so if needed. * lib/xattr-at.h: Include sys/xattr.h or attr/xattr.h, depending on which one is detected. * src/Makefile.am [TAR_LIB_ATTR] (tar_LDADD): Link against -lattr.