-O3 -pipe -march=skylake -ggdb -flto=thin -Werror=odr -Werror=strict-aliasing -ffile-prefix-map=/var/tmp/portage/media-libs/libpng-1.6.59-r1/work=/usr/src/debug/media-libs/libpng-1.6.59-r1 -ffat-lto-objects
