Hi Benoît, > AC_ARG_WITH([foo], > [AC_HELP_STRING([--with-foo=whatever], > [Specifies something for foo @<:@default value > here@:>@])], > [], [with_foo=no]) > > case $with_foo in > no) echo some default action > ;; > bar) echo do whatever you want > ;; > *) AC_MSG_ERROR([Invalid value for --with-foo: `$with_foo']) > ;; > esac > > Is that what you want? No. I am looking for a way to catch the options the script really knows nothing about. To be more concrete: the configure script of the brltty project uses an option called -with-braille-drivers=. For the moment, when configure is called with the mis-spelled -with-braile-drivers=something (one l instead of two ls), the user is not warned. We would like to detect the incorrect options and to report them. Is that possible ? Thanks, Sébastien. _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf