config BR2_PACKAGE_MEMTEST86 bool "memtest86" depends on BR2_i386 || BR2_x86_64 help Memtest86+ is a bootable standalone memory test program. Buildroot does not support packages with a '+' sign in their name, which explains why it is named memtest86 and not memtest86+. Memtest86+ is a utility designed to test whether your memory is in working order. It repeatedly writes an enormous amount of different patterns to all memory locations and reads them back again and verifies whether the result of the read is the same as what was written to memory. Memtest86+ will only work on 32-bit or 64-bit x86 targets. It boots as an i486 program and autodetects hardware. It can be added to the grub2 boot menu by adding the following lines to the bottom of /boot/grub/grub.cfg - note the use of linux16. menuentry "Memtest86+" { linux16 /boot/memtest86+.bin } Other boot loaders will have similar requirements. http://www.memtest.org