With this patch it is possible to put e.g. "perl::XML:XPath -" in
$buildreq in bootstrap.conf which will cause a check for perl module
XML::XPath using:
perl -m"XML::XPath" -e 'exit 0' >/dev/null 2>&1
If this fails due to any other error than XML::XPath missing, it is left
on the user to fix up his/her bootstrap.conf. One of the examples
might be perl itself missing, which should be in $buildreq and precede
any perl::Module specifications. Versioning of perl modules is not
supported.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>