* Package:    dev-qt/qtcore-5.9.4-r2
 * Repository: gentoo
 * Maintainer: qt@gentoo.org
 * Upstream:   https://bugreports.qt.io/
 * USE:        abi_x86_64 amd64 elibc_glibc icu kernel_linux userland_GNU
 * FEATURES:   preserve-libs sandbox userpriv usersandbox
>>> Unpacking source...
>>> Unpacking qtbase-opensource-src-5.9.4.tar.xz to /var/tmp/portage/dev-qt/qtcore-5.9.4-r2/work
>>> Source unpacked in /var/tmp/portage/dev-qt/qtcore-5.9.4-r2/work
>>> Preparing source in /var/tmp/portage/dev-qt/qtcore-5.9.4-r2/work/qtbase-opensource-src-5.9.4 ...
find: The relative path ‘$ROOTPATH’ is included in the PATH environment variable, which is insecure in combination with the -execdir action of find.  Please remove that entry from $PATH
 * ERROR: dev-qt/qtcore-5.9.4-r2::gentoo failed (prepare phase):
 *   (no error message)
 * 
 * Call stack:
 *     ebuild.sh, line  124:  Called src_prepare
 *   environment, line 2822:  Called qt5-build_src_prepare
 *   environment, line 2368:  Called die
 * The specific snippet of code:
 *           find config.tests/common -name '*.pro' -type f -execdir sed -i -e '/QMAKE_CXXFLAGS\s*+=/ d' '{}' + || die;
 * 
 * If you need support, post the output of `emerge --info '=dev-qt/qtcore-5.9.4-r2::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=dev-qt/qtcore-5.9.4-r2::gentoo'`.
 * The complete build log is located at '/var/tmp/portage/dev-qt/qtcore-5.9.4-r2/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-qt/qtcore-5.9.4-r2/temp/environment'.
 * Working directory: '/var/tmp/portage/dev-qt/qtcore-5.9.4-r2/work/qtbase-opensource-src-5.9.4'
 * S: '/var/tmp/portage/dev-qt/qtcore-5.9.4-r2/work/qtbase-opensource-src-5.9.4'