Falha ao compilar o qtwebkit no Gentoo

If you need support, post the output of `emerge --info '=dev-qt/qtwebkit-5.5.1-r1::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=dev-qt/qtwebkit-5.5.1-r1::gentoo'`.
 * The complete build log is located at '/var/tmp/portage/dev-qt/qtwebkit-5.5.1-r1/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-qt/qtwebkit-5.5.1-r1/temp/environment'.
 * Working directory: '/var/tmp/portage/dev-qt/qtwebkit-5.5.1-r1/work/qtwebkit-opensource-src-5.5.1'
 * S: '/var/tmp/portage/dev-qt/qtwebkit-5.5.1-r1/work/qtwebkit-opensource-src-5.5.1'