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486 lines
13 KiB
Plaintext
.. _changes:
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Minimal requerements to compile the Kernel
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++++++++++++++++++++++++++++++++++++++++++
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Intro
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=====
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This document is designed to provide a list of the minimum levels of
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software necessary to run the 4.x kernels.
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This document is originally based on my "Changes" file for 2.0.x kernels
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and therefore owes credit to the same people as that file (Jared Mauch,
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Axel Boldt, Alessandro Sigala, and countless other users all over the
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'net).
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Current Minimal Requirements
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****************************
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Upgrade to at **least** these software revisions before thinking you've
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encountered a bug! If you're unsure what version you're currently
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running, the suggested command should tell you.
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Again, keep in mind that this list assumes you are already functionally
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running a Linux kernel. Also, not all tools are necessary on all
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systems; obviously, if you don't have any ISDN hardware, for example,
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you probably needn't concern yourself with isdn4k-utils.
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====================== =============== ========================================
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Program Minimal version Command to check the version
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====================== =============== ========================================
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GNU C 3.2 gcc --version
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GNU make 3.80 make --version
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binutils 2.12 ld -v
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util-linux 2.10o fdformat --version
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module-init-tools 0.9.10 depmod -V
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e2fsprogs 1.41.4 e2fsck -V
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jfsutils 1.1.3 fsck.jfs -V
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reiserfsprogs 3.6.3 reiserfsck -V
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xfsprogs 2.6.0 xfs_db -V
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squashfs-tools 4.0 mksquashfs -version
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btrfs-progs 0.18 btrfsck
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pcmciautils 004 pccardctl -V
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quota-tools 3.09 quota -V
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PPP 2.4.0 pppd --version
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isdn4k-utils 3.1pre1 isdnctrl 2>&1|grep version
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nfs-utils 1.0.5 showmount --version
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procps 3.2.0 ps --version
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oprofile 0.9 oprofiled --version
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udev 081 udevd --version
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grub 0.93 grub --version || grub-install --version
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mcelog 0.6 mcelog --version
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iptables 1.4.2 iptables -V
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openssl & libcrypto 1.0.0 openssl version
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bc 1.06.95 bc --version
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Sphinx\ [#f1]_ 1.2 sphinx-build --version
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====================== =============== ========================================
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.. [#f1] Sphinx is needed only to build the Kernel documentation
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Kernel compilation
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******************
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GCC
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---
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The gcc version requirements may vary depending on the type of CPU in your
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computer.
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Make
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----
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You will need GNU make 3.80 or later to build the kernel.
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Binutils
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--------
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Linux on IA-32 has recently switched from using ``as86`` to using ``gas`` for
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assembling the 16-bit boot code, removing the need for ``as86`` to compile
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your kernel. This change does, however, mean that you need a recent
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release of binutils.
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Perl
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----
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You will need perl 5 and the following modules: ``Getopt::Long``,
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``Getopt::Std``, ``File::Basename``, and ``File::Find`` to build the kernel.
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BC
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--
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You will need bc to build kernels 3.10 and higher
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OpenSSL
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-------
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Module signing and external certificate handling use the OpenSSL program and
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crypto library to do key creation and signature generation.
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You will need openssl to build kernels 3.7 and higher if module signing is
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enabled. You will also need openssl development packages to build kernels 4.3
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and higher.
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System utilities
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****************
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Architectural changes
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---------------------
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DevFS has been obsoleted in favour of udev
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(http://www.kernel.org/pub/linux/utils/kernel/hotplug/)
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32-bit UID support is now in place. Have fun!
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Linux documentation for functions is transitioning to inline
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documentation via specially-formatted comments near their
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definitions in the source. These comments can be combined with the
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SGML templates in the Documentation/DocBook directory to make DocBook
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files, which can then be converted by DocBook stylesheets to PostScript,
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HTML, PDF files, and several other formats. In order to convert from
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DocBook format to a format of your choice, you'll need to install Jade as
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well as the desired DocBook stylesheets.
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Util-linux
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----------
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New versions of util-linux provide ``fdisk`` support for larger disks,
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support new options to mount, recognize more supported partition
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types, have a fdformat which works with 2.4 kernels, and similar goodies.
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You'll probably want to upgrade.
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Ksymoops
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--------
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If the unthinkable happens and your kernel oopses, you may need the
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ksymoops tool to decode it, but in most cases you don't.
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It is generally preferred to build the kernel with ``CONFIG_KALLSYMS`` so
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that it produces readable dumps that can be used as-is (this also
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produces better output than ksymoops). If for some reason your kernel
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is not build with ``CONFIG_KALLSYMS`` and you have no way to rebuild and
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reproduce the Oops with that option, then you can still decode that Oops
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with ksymoops.
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Module-Init-Tools
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-----------------
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A new module loader is now in the kernel that requires ``module-init-tools``
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to use. It is backward compatible with the 2.4.x series kernels.
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Mkinitrd
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--------
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These changes to the ``/lib/modules`` file tree layout also require that
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mkinitrd be upgraded.
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E2fsprogs
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---------
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The latest version of ``e2fsprogs`` fixes several bugs in fsck and
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debugfs. Obviously, it's a good idea to upgrade.
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JFSutils
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--------
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The ``jfsutils`` package contains the utilities for the file system.
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The following utilities are available:
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- ``fsck.jfs`` - initiate replay of the transaction log, and check
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and repair a JFS formatted partition.
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- ``mkfs.jfs`` - create a JFS formatted partition.
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- other file system utilities are also available in this package.
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Reiserfsprogs
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-------------
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The reiserfsprogs package should be used for reiserfs-3.6.x
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(Linux kernels 2.4.x). It is a combined package and contains working
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versions of ``mkreiserfs``, ``resize_reiserfs``, ``debugreiserfs`` and
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``reiserfsck``. These utils work on both i386 and alpha platforms.
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Xfsprogs
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--------
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The latest version of ``xfsprogs`` contains ``mkfs.xfs``, ``xfs_db``, and the
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``xfs_repair`` utilities, among others, for the XFS filesystem. It is
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architecture independent and any version from 2.0.0 onward should
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work correctly with this version of the XFS kernel code (2.6.0 or
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later is recommended, due to some significant improvements).
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PCMCIAutils
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-----------
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PCMCIAutils replaces ``pcmcia-cs``. It properly sets up
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PCMCIA sockets at system startup and loads the appropriate modules
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for 16-bit PCMCIA devices if the kernel is modularized and the hotplug
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subsystem is used.
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Quota-tools
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-----------
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Support for 32 bit uid's and gid's is required if you want to use
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the newer version 2 quota format. Quota-tools version 3.07 and
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newer has this support. Use the recommended version or newer
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from the table above.
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Intel IA32 microcode
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--------------------
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A driver has been added to allow updating of Intel IA32 microcode,
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accessible as a normal (misc) character device. If you are not using
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udev you may need to::
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mkdir /dev/cpu
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mknod /dev/cpu/microcode c 10 184
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chmod 0644 /dev/cpu/microcode
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as root before you can use this. You'll probably also want to
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get the user-space microcode_ctl utility to use with this.
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udev
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----
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``udev`` is a userspace application for populating ``/dev`` dynamically with
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only entries for devices actually present. ``udev`` replaces the basic
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functionality of devfs, while allowing persistent device naming for
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devices.
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FUSE
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----
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Needs libfuse 2.4.0 or later. Absolute minimum is 2.3.0 but mount
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options ``direct_io`` and ``kernel_cache`` won't work.
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Networking
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**********
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General changes
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---------------
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If you have advanced network configuration needs, you should probably
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consider using the network tools from ip-route2.
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Packet Filter / NAT
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-------------------
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The packet filtering and NAT code uses the same tools like the previous 2.4.x
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kernel series (iptables). It still includes backwards-compatibility modules
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for 2.2.x-style ipchains and 2.0.x-style ipfwadm.
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PPP
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---
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The PPP driver has been restructured to support multilink and to
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enable it to operate over diverse media layers. If you use PPP,
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upgrade pppd to at least 2.4.0.
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If you are not using udev, you must have the device file /dev/ppp
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which can be made by::
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mknod /dev/ppp c 108 0
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as root.
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Isdn4k-utils
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------------
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Due to changes in the length of the phone number field, isdn4k-utils
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needs to be recompiled or (preferably) upgraded.
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NFS-utils
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---------
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In ancient (2.4 and earlier) kernels, the nfs server needed to know
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about any client that expected to be able to access files via NFS. This
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information would be given to the kernel by ``mountd`` when the client
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mounted the filesystem, or by ``exportfs`` at system startup. exportfs
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would take information about active clients from ``/var/lib/nfs/rmtab``.
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This approach is quite fragile as it depends on rmtab being correct
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which is not always easy, particularly when trying to implement
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fail-over. Even when the system is working well, ``rmtab`` suffers from
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getting lots of old entries that never get removed.
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With modern kernels we have the option of having the kernel tell mountd
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when it gets a request from an unknown host, and mountd can give
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appropriate export information to the kernel. This removes the
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dependency on ``rmtab`` and means that the kernel only needs to know about
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currently active clients.
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To enable this new functionality, you need to::
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mount -t nfsd nfsd /proc/fs/nfsd
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before running exportfs or mountd. It is recommended that all NFS
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services be protected from the internet-at-large by a firewall where
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that is possible.
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mcelog
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------
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On x86 kernels the mcelog utility is needed to process and log machine check
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events when ``CONFIG_X86_MCE`` is enabled. Machine check events are errors
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reported by the CPU. Processing them is strongly encouraged.
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Kernel documentation
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********************
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Sphinx
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------
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The ReST markups currently used by the Documentation/ files are meant to be
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built with ``Sphinx`` version 1.2 or upper. If you're desiring to build
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PDF outputs, it is recommended to use version 1.4.6.
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.. note::
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Please notice that, for PDF and LaTeX output, you'll also need ``XeLaTeX``
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version 3.14159265. Depending on the distribution, you may also need
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to install a series of ``texlive`` packages that provide the minimal
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set of functionalities required for ``XeLaTex`` to work.
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Other tools
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-----------
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In order to produce documentation from DocBook, you'll also need ``xmlto``.
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Please notice, however, that we're currently migrating all documents to use
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``Sphinx``.
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Getting updated software
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========================
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Kernel compilation
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******************
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gcc
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---
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- <ftp://ftp.gnu.org/gnu/gcc/>
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Make
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----
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- <ftp://ftp.gnu.org/gnu/make/>
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Binutils
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--------
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- <ftp://ftp.kernel.org/pub/linux/devel/binutils/>
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OpenSSL
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-------
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- <https://www.openssl.org/>
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System utilities
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****************
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Util-linux
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----------
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- <ftp://ftp.kernel.org/pub/linux/utils/util-linux/>
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Ksymoops
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--------
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- <ftp://ftp.kernel.org/pub/linux/utils/kernel/ksymoops/v2.4/>
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Module-Init-Tools
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-----------------
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- <ftp://ftp.kernel.org/pub/linux/kernel/people/rusty/modules/>
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Mkinitrd
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--------
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- <https://code.launchpad.net/initrd-tools/main>
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E2fsprogs
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---------
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- <http://prdownloads.sourceforge.net/e2fsprogs/e2fsprogs-1.29.tar.gz>
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JFSutils
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--------
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- <http://jfs.sourceforge.net/>
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Reiserfsprogs
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-------------
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- <http://www.kernel.org/pub/linux/utils/fs/reiserfs/>
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Xfsprogs
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--------
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- <ftp://oss.sgi.com/projects/xfs/>
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Pcmciautils
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-----------
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- <ftp://ftp.kernel.org/pub/linux/utils/kernel/pcmcia/>
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Quota-tools
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-----------
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- <http://sourceforge.net/projects/linuxquota/>
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DocBook Stylesheets
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-------------------
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- <http://sourceforge.net/projects/docbook/files/docbook-dsssl/>
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XMLTO XSLT Frontend
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-------------------
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- <http://cyberelk.net/tim/xmlto/>
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Intel P6 microcode
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------------------
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- <https://downloadcenter.intel.com/>
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udev
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----
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- <http://www.freedesktop.org/software/systemd/man/udev.html>
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FUSE
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----
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- <http://sourceforge.net/projects/fuse>
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mcelog
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------
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- <http://www.mcelog.org/>
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Networking
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**********
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PPP
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---
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- <ftp://ftp.samba.org/pub/ppp/>
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Isdn4k-utils
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------------
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- <ftp://ftp.isdn4linux.de/pub/isdn4linux/utils/>
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NFS-utils
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---------
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- <http://sourceforge.net/project/showfiles.php?group_id=14>
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Iptables
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--------
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- <http://www.iptables.org/downloads.html>
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Ip-route2
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---------
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- <https://www.kernel.org/pub/linux/utils/net/iproute2/>
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OProfile
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--------
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- <http://oprofile.sf.net/download/>
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NFS-Utils
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---------
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- <http://nfs.sourceforge.net/>
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Kernel documentation
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********************
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Sphinx
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------
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- <http://www.sphinx-doc.org/>
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