Fixes automake bug https://bugs.gnu.org/20713.
If `id` fails, display a specific warning message to the user. * m4/tar.m4: Check $am_uid & $am_gid if they're unknown. --- m4/tar.m4 | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) diff --git a/m4/tar.m4 b/m4/tar.m4 index 7e3df4f98e1c..8f4d2f21394b 100644 --- a/m4/tar.m4 +++ b/m4/tar.m4 @@ -46,15 +46,19 @@ m4_if([$1], [v7], am_uid=`id -u || echo unknown` am_gid=`id -g || echo unknown` AC_MSG_CHECKING([whether UID '$am_uid' is supported by ustar format]) - if test $am_uid -le $am_max_uid; then - AC_MSG_RESULT([yes]) + if test x$am_uid = xunknown; then + AC_MSG_WARN([ancient id detected; assuming current UID is ok, but dist-ustar might not work]) + elif test $am_uid -le $am_max_uid; then + AC_MSG_RESULT([yes]) else - AC_MSG_RESULT([no]) - _am_tools=none + AC_MSG_RESULT([no]) + _am_tools=none fi AC_MSG_CHECKING([whether GID '$am_gid' is supported by ustar format]) - if test $am_gid -le $am_max_gid; then - AC_MSG_RESULT([yes]) + if test x$gm_gid = xunknown; then + AC_MSG_WARN([ancient id detected; assuming current GID is ok, but dist-ustar might not work]) + elif test $am_gid -le $am_max_gid; then + AC_MSG_RESULT([yes]) else AC_MSG_RESULT([no]) _am_tools=none -- 2.34.1