Hi Eric, * Eric Blake wrote on Fri, Oct 24, 2008 at 01:16:53PM CEST: > According to Ralf Wildenhues on 10/24/2008 12:39 AM: > >> AC_CHECK_PROGS(PURIFY,purify purify2002) > >> > >> if test -z $PURIFY; then > > > > This however does need quoting: if $PURIFY can ever be empty, then the > > shell will complain about a missing argument to 'test -z'. So use > > if test -z "$PURIFY"; ... > > Actually, if $PURIFY is empty, the test will still return exit status 0, > since "-z" is a lone, non-empty argument. Silent misbehavior is even > worse than a shell complaint (you want exit status 1 if $PURIFY is empty). Huh? Several bits are going past each other here: - the test is trying to test whether $PURIFY is empty. As such the test is correct, not false, - many vendor shells complain about 'test -z' without further argument: $ sh $ test -z test: argument expected $ echo $? 1 $ uname -mrs SunOS 5.10 sun4u (IIRC purify was at one time sold for IRIX), - independently of all of the above, you still need to quote $PURIFY, otherwise things like PURIFY='whatever -o -n oh-more-args-for-test...' do something you definitely did not intend. Was that you replying, Eric? ;-) Cheers, Ralf _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf
