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Yes, it's still used 1231# in the wild :-( We should find a proper way to deprecate it ... 1232AC_SUBST([AMTAR], ['$${TAR-tar}']) 1233 1234# We'll loop over all known methods to create a tar archive until one works. 1235_am_tools='gnutar m4_if([$1], [ustar], [plaintar]) pax cpio none' 1236 1237m4_if([$1], [v7], 1238 [am__tar='$${TAR-tar} chof - "$$tardir"' am__untar='$${TAR-tar} xf -'], 1239 1240 [m4_case([$1], 1241 [ustar], 1242 [# The POSIX 1988 'ustar' format is defined with fixed-size fields. 1243 # There is notably a 21 bits limit for the UID and the GID. In fact, 1244 # the 'pax' utility can hang on bigger UID/GID (see automake bug#8343 1245 # and bug#13588). 1246 am_max_uid=2097151 # 2^21 - 1 1247 am_max_gid=$am_max_uid 1248 # The $UID and $GID variables are not portable, so we need to resort 1249 # to the POSIX-mandated id(1) utility. Errors in the 'id' calls 1250 # below are definitely unexpected, so allow the users to see them 1251 # (that is, avoid stderr redirection). 1252 am_uid=`id -u || echo unknown` 1253 am_gid=`id -g || echo unknown` 1254 AC_MSG_CHECKING([whether UID '$am_uid' is supported by ustar format]) 1255 if test x$am_uid = xunknown; then 1256 AC_MSG_WARN([ancient id detected; assuming current UID is ok, but dist-ustar might not work]) 1257 elif test $am_uid -le $am_max_uid; then 1258 AC_MSG_RESULT([yes]) 1259 else 1260 AC_MSG_RESULT([no]) 1261 _am_tools=none 1262 fi 1263 AC_MSG_CHECKING([whether GID '$am_gid' is supported by ustar format]) 1264 if test x$gm_gid = xunknown; then 1265 AC_MSG_WARN([ancient id detected; assuming current GID is ok, but dist-ustar might not work]) 1266 elif test $am_gid -le $am_max_gid; then 1267 AC_MSG_RESULT([yes]) 1268 else 1269 AC_MSG_RESULT([no]) 1270 _am_tools=none 1271 fi], 1272 1273 [pax], 1274 [], 1275 1276 [m4_fatal([Unknown tar format])]) 1277 1278 AC_MSG_CHECKING([how to create a $1 tar archive]) 1279 1280 # Go ahead even if we have the value already cached. 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