EmDebSys (formerly CML2+OS)
Emdebsys is a system creation and configuration tool for embedded Linux. It was originally known as CML2+OS (2000-2001), and this name still appears in various places.
It is a system for the configuration and generation of both a Linux kernel *AND* an operating system (i.e. root filesystem). EmDebSys is being designed to assist embedded Linux developers in configuring and generating small (1 to 10Mb) GNU/Linux target systems.
EmDebSys was originally based on CML2, (CML stands for Configuration Menu Language), but now also uses kconfig, in line with the current Linux kernel configuration system. See http://www.tuxedo.org/~esr/kbuild for more information on CML2.
Some of the goals of EmDebSys are
The architecture of EmDebSys consists of a front end (the Configurator) and a back end (the Generator). The Configurator is based on extending the Kconfig/CML2 rulebase with configuration rules for the operating system. It produces a standard Linux '.config' file augmented with OS configuration information.
The Generator (back end) takes this config file, and generates a file system containing the OS.
There are many conceivable ways of building such a filesystem. The existing implementation primarily uses the simple, yet powerful, technique of extracting pre-built binaries from existing Debian binary packages. It can also compile some packages from source (the kernel, busybox, tinylogin and uclibc) This will enable the building of minimal operating systems for any debian-suppported architecture (currently ARM, PowerPC, SPARC, Intel x86, Alpha, MIPS, Motorola 680x0, HPA, s390, IA640. At the moment x86 and ARM are tested and supported.
To get an understanding of what emdebsys does and how you use it, read Wookey's article explaining how emdebsys works. It covers the configuration and system generation, along with examples of the CML2 language and the powerful way it lets you specify a system.
The most recent version is in CVS. Anonymous CVS access is available at a CVSROOT of :pserver:firstname.lastname@example.org:/cvsroot/emdebian. The module name is emdebsys.
emdebsys source tarballs can be downloaded from emdebsys.tar.gz.
Last Modified: Mon, Jan 19 12:12:51 UTC 2004
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