• Future of 32-bit platform support in FreeBSD

    From John Baldwin@21:1/5 to All on Mon Feb 12 18:00:06 2024
    FreeBSD is deprecating 32-bit platforms over the next couple of major
    releases. We anticipate FreeBSD 15.0 will not include the armv6,
    i386, and powerpc platforms, and FreeBSD 16.0 will not include armv7.
    Support for executing 32-bit binaries on 64-bit kernels will be
    retained through at least the lifetime of the stable/16 branch if not
    longer. (There is currently no plan to remove support for 32-bit
    binaries on 64-bit kernels.)

    More background:

    Since its inception, FreeBSD has aimed to provide a stable and
    performant general-purpose BSD-based operating system for modern and widely-available systems. Initially this took the form of focusing on
    the i386 architecture. Over time FreeBSD has added and removed
    support for various architectures based on changes in the marketplace
    (in some cases, anticipated changes in the marketplace).

    The decision to remove support for an architecture in particular
    depends on a couple of factors including both the future viability and availability of systems using that architecture as well as the
    developer resources available in the project to continue maintaining
    support. In addition, some changes and features may require explicit
    support on each architecture. Architectures that are less
    well-maintained can degrade into a tax on such changes delaying their implementation on architectures with stronger support.

    Looking forward, general purpose 32-bit platforms are in a state of
    decline in the marketplace (some more quickly than others), and we
    have a shrinking pool of developers dedicated to supporting them. Of
    our existing 32-bit platforms today (i386, armv[67], powerpc), only
    armv7 continues to be used in recent system designs. We feel that
    FreeBSD will be better served by narrowing the focus of our developer
    resources on 64-bit systems moving forward. This includes both
    deprecating existing 32-bit platforms and not adding new 32-bit
    platforms (e.g., FreeBSD does not plan to add a 32-bit RISC-V
    architecture). Support for individual 32-bit platforms may be
    extended if there is both demand and commitment to increased developer resources.

    More details on the current plans for the future of 32-bit platforms
    can be found in the "General Notes Regarding Future FreeBSD Releases"
    section of the 14.0 release notes at https://www.freebsd.org/releases/14.0R/relnotes/

    On behalf of the FreeBSD Core Team,

    --
    John Baldwin

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