The first compilation will take some time, as software packages for the toolchain and other components are downloaded, extracted and compiled on your build machine! Now select Exit to end the Buildroot configuration, save the changes of course (These settings are stored in the. (otherwise the build system will complain that it couldn’t find a kernel configuration file). It corresponds to the linux-2.6.37/arch/x86/configs/i386_defconfig file In Defconfig name, enter the value : i386 If you want to put your embedded system on a bootable USB drive, you can use SYSLINUX/EXTLINUX to make it bootable (see here!). We will test our image using qemu so we don’t need a bootloader yet. (note : cramfs does the same, but is older and limited to a 16Meg rootfs max.) This way, our system files (rootfs) will be contained within the kernel file, and loaded into RAM by the kernel. initramfs for initial ramdisk of linux kernel – some lightweight networking apps : dropbear (SSH server), thttpd (ultra small http server) Show packages that are also provided by busybox We select here the software packages we want to be in our embedded system “Port to run a getty (login prompt) on” to tty1 instead of ttyS0, in order to get a login prompt when booting your generated system! Generic serial port config (can be useful) System hostname : choose your system name My target architecture is an x86 system, optimized for Pentium (i686). On Debian/Ubuntu, this is done by installing packages such as :įirst of all, we need to download and setup Buildroot on our build machine. Prior to using it, you’ll have to install a development environment on your system (GCC compiler, Linux kernel headers, make tools etc). In this tutorial I have used a Ubuntu 10.04 system as my build machine. The only minimal system I have been able to install so far on a 128Meg disk is NetBSD ( ).īut there is a way to achieve such a thing : we will be using Buildroot in order to generate a very small (embedded) Linux system (targeted at a standard intel x86 computer) Have you ever tried to install a modern Linux distro onto a small capacity (usually 32 megs or even less) usb drive or compact flash card?Įven with a minimal install, such a distribution will not fit! Major Linux distros like Debian/Slackware/Arch/etc need a bare minimum of 300-400 megs of disk space.
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January 2023
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