Hopefully get rid of this terrible warning.
require 'mkmf'
$CFLAGS += " -std=c99"
+CONFIG['warnflags'].gsub!('-Wdeclaration-after-statement', '')
+
if have_library('xml2', 'xmlNewDoc')
# libxml2 libraries from http://www.xmlsoft.org/
pkg_config('libxml-2.0')
