I am trying to build l4linux. Version of l4linux - 3.16.0 I am using fiasco.oc and l4re I configured using the command : sudo make O=build/kernel menuconfig and changed the path to l4re build directory in l4linux configuration. The following errors come when I build it. user@user-VirtualBox:~/src/l4re/src/l4linux$ sudo make O=build/kernel make[1]: Entering directory `/home/user/src/l4re/src/l4linux/build/kernel' GEN ./Makefile scripts/kconfig/conf --silentoldconfig Kconfig =============================================== For quick build instructions, please visit: http://wiki.tudos.org/Quickstart http://l4linux.org/build.shtml =============================================== ERROR: CONFIG_HIGHMEM64G must not be enabled. ERROR: CONFIG_PCI_GOANY must not be enabled. ERROR: CONFIG_X86_MCE must not be enabled. ERROR: CONFIG_X86_MCE must not be enabled. ERROR: CONFIG_MTRR must not be enabled. ERROR: CONFIG_PARAVIRT must not be enabled. ERROR: CONFIG_KEXEC must not be enabled. ERROR: CONFIG_CPU_FREQ must not be enabled. ERROR: CONFIG_VM86 must not be enabled. ERROR: CONFIG_HT_IRQ must not be enabled. ERROR: CONFIG_DMI must not be enabled. ERROR: CONFIG_TRANSPARENT_HUGEPAGE must not be enabled. ERROR: CONFIG_COMPACTION must not be enabled. ERROR: CONFIG_X86_PAE must not be enabled. ERROR: CONFIG_X86_SMAP must not be enabled. ERROR: CONFIG_PNP must not be enabled. ERROR: CONFIG_HPET_TIMER must not be enabled. make[1]: *** [check_linux_config] Error 1 make: *** [sub-make] Error 2 I tried reconfiguring again to diable the features mentioned above. But I could not find the location of the above features in the menu-based window. Please help to resolve the problem. Gayathri