Using Default

[Eric Brown]

Can anyone give me a better example of how the Default command works?  I'm
trying to set up cons to install files as part of a post-processing pass.

So my Conscript has 


$wantinstall = "";
    while ($_ = shift(@ARGV)) {
        $wantinstall = 1 if $_ =~ /-inst(all)?/i;
    }

if ($wantinstall) {
    Default 'install';
}
else
{
        Default 'export';
Export qw(CONS INCLUDE LIB BIN BUILD BUILDTYPE EXPORT DEFINES WCEPROCESSOR);

$CONSBASE = new cons();

@PROCESSORS = qw(
        x86em
        SH3
        ARM
        );

@SUBDIRS = qw(
        apps
        common
        );

map(BuildConfig($_),@types);
}

Now, when I don't specify anything, everything builds great.  But when I run
cons -- -install, all I get is

cons.bat: Nothing to build.
cons.bat: "install" is up-to-date.

So what *exactly* does Default do?