--- VirtualBox-5.2.12/configure.orig 2018-05-09 19:31:32.000000000 +0300 +++ VirtualBox-5.2.12/configure 2018-05-13 00:09:10.862320146 +0300 @@ -135,7 +135,7 @@ INCVNCSERVER="" LIBVNCSERVER="-lvncserver" INCDEVMAPPER="" LIBDEVMAPPER="-ldevmapper" -CXX_FLAGS="" +CXX_FLAGS="-std=c++11" if [ "$OS" = "freebsd" ]; then INCCURL="-I/usr/local/include" LIBCURL="-L/usr/local/lib -lcurl"