Currently, the Linux kernel is normally used - but we are expanding to Hurd, OpenDarwin and OpenBSD; more to come. T2 started as a community driven fork from the ROCK Linux Project with the aim to create a decentralised development and a clean framework for spin-off projects and customised distributions.
T2 SDE is not just a common Linux distribution - it is a flexible Open Source System Development Environment or Distribution Build Kit (others might even name it Meta Distribution). T2 allows the creation of custom distributions with state of the art technology, up-to-date packages and integrated support for cross compilation. Currently the Linux kernel is normally used - but the T2 SDE is being expanded to Minix, Hurd, OpenDarwin, Haiku and OpenBSD - more to come.
As T2 comes with a sophisticated build system with support for cross compiling including the bootstrap of a cross toolchain it is fairly easy to use T2 to build or port to new OS kernel.
In the beginning T2 was designed closely around Linus Torvald's Linux kernel. However as this support is fairly complete, now and also because other interesting kernel arrive at the horizon the T2 project took the next step forward to support multiple OS kernel.
Aside the sophisticated Linux support, Minix and OpenBSD support is beeing worked on.
Updates (via Distrowatch).
Rene Rebe has announced the release of T2 SDE 8.0, a distribution build kit designed for advanced Linux users who wish to build custom distributions: "After years of development we are proud to announce the availability of the new T2 stable release, version 8.0. This release received updates across the board, while a major working target was to further improve cross compilation, and all official ISO images are now fully cross-built. Over 10,000 Subversion revisions indicate the magnitude of the release, with over 200 new packages, new features and various other improvements and fixes.
User visible changes: GCC 4.5.0, glibc 2.11.2, X.Org 7.5, preliminary support for LLVM/clang and MinGW/Win32." Visit the project's home page to read the release announcement.
The new version is available for download as a source tarball; alternatively, a set of pre-compiled CD images for i486, powerpc, powerpc64 and x86_64 is also provided: t2-8.0-minimal-i486.iso (200MB, MD5), t2-8.0-minimal-x86_64.iso (242MB, MD5).
• 2010-07-15: Distribution Release: T2 SDE 8.0
• 2007-11-13: Development Release: T2 SDE 7.0 RC2
• 2007-06-02: Development Release: T2 SDE 7.0 RC
• 2007-03-28: Distribution Release: T2 SDE 6.0.3
• 2006-12-07: Distribution Release: T2 SDE 6.0.2
• 2006-10-30: Distribution Release: T2 SDE 6.0.1