No subject

    check_pl_lib "Date::Manip" || disable_weather "Date::Manip"
    check_pl_lib "XML::Simple" || disable_weather "XML::Simple"
    check_pl_lib "XML::XPath" || disable_weather "XML::XPath"
    check_pl_lib "Image::Size" || disable_weather "Image::Size"
    check_pl_lib "DateTime::Format::ISO8601" ||
        disable_weather "DateTime::Format::ISO8601"
    check_pl_lib "SOAP::Lite" || disable_weather "SOAP::Lite"
    check_pl_lib "JSON" || disable_weather "JSON"
fi

if any of those libs are missing, the configure script will run
disable_weather "DateTime::Format::ISO8601" , even if
DateTime::Format::ISO8601 is not at fault.

Sounds like a bug in mythplugins.