Bob Lockie <bjlockie@xxxxxxxxx> writes: > Shouldn't the following give an error about an unknown option > "./configure --enable-debu=full"? Actually this is explained in the Autoconf manual: `configure' scripts do not complain about `--enable-FEATURE' options that they do not support. This behavior permits configuring a source tree containing multiple packages with a top-level `configure' script when the packages support different options, without spurious error messages about options that some of the packages support. An unfortunate side effect is that option spelling errors are not diagnosed. No better approach to this problem has been suggested so far. -- "Because computer source code is an expressive means for the exchange of information and ideas about computer programming, we hold that it is protected by the First Amendment." --Hon. Boyce F. Martin, Jr., for the 6th Circuit Court, Junger vs. Daley