disable [-Wunused-result] warning GCC : https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25509
disable [-Wunused-result] warning GCC : https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25509

mapnik/mapnik,tomhughes/mapnik,mapnik/mapnik,mapnik/mapnik,lightmare/mapnik,naturalatlas/mapnik,naturalatlas/mapnik,lightmare/mapnik,lightmare/mapnik,naturalatlas/mapnik,tomhughes/mapnik,lightmare/mapnik,naturalatlas/mapnik,tomhughes/mapnik,mapnik/mapnik,tomhughes/mapnik