Hello David, * Dr. David Kirkby wrote on Wed, Aug 12, 2009 at 11:18:29AM CEST: > What's the best way to check if an environment variable is set? if test "${var+set}" = set; then echo "variable \$var is set to: $var" fi Cheers, Ralf _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf