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Linux/Documentation/process/changes.rst

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Diff markup

Differences between /Documentation/process/changes.rst (Version linux-6.11.5) and /Documentation/process/changes.rst (Version linux-6.1.114)


  1 .. _changes:                                        1 .. _changes:
  2                                                     2 
  3 Minimal requirements to compile the Kernel          3 Minimal requirements to compile the Kernel
  4 ++++++++++++++++++++++++++++++++++++++++++          4 ++++++++++++++++++++++++++++++++++++++++++
  5                                                     5 
  6 Intro                                               6 Intro
  7 =====                                               7 =====
  8                                                     8 
  9 This document is designed to provide a list of      9 This document is designed to provide a list of the minimum levels of
 10 software necessary to run the current kernel v     10 software necessary to run the current kernel version.
 11                                                    11 
 12 This document is originally based on my "Chang     12 This document is originally based on my "Changes" file for 2.0.x kernels
 13 and therefore owes credit to the same people a     13 and therefore owes credit to the same people as that file (Jared Mauch,
 14 Axel Boldt, Alessandro Sigala, and countless o     14 Axel Boldt, Alessandro Sigala, and countless other users all over the
 15 'net).                                             15 'net).
 16                                                    16 
 17 Current Minimal Requirements                       17 Current Minimal Requirements
 18 ****************************                       18 ****************************
 19                                                    19 
 20 Upgrade to at **least** these software revisio     20 Upgrade to at **least** these software revisions before thinking you've
 21 encountered a bug!  If you're unsure what vers     21 encountered a bug!  If you're unsure what version you're currently
 22 running, the suggested command should tell you     22 running, the suggested command should tell you.
 23                                                    23 
 24 Again, keep in mind that this list assumes you     24 Again, keep in mind that this list assumes you are already functionally
 25 running a Linux kernel.  Also, not all tools a     25 running a Linux kernel.  Also, not all tools are necessary on all
 26 systems; obviously, if you don't have any PC C     26 systems; obviously, if you don't have any PC Card hardware, for example,
 27 you probably needn't concern yourself with pcm     27 you probably needn't concern yourself with pcmciautils.
 28                                                    28 
 29 ====================== ===============  ======     29 ====================== ===============  ========================================
 30         Program        Minimal version       C     30         Program        Minimal version       Command to check the version
 31 ====================== ===============  ======     31 ====================== ===============  ========================================
 32 GNU C                  5.1              gcc --     32 GNU C                  5.1              gcc --version
 33 Clang/LLVM (optional)  13.0.1           clang  !!  33 Clang/LLVM (optional)  11.0.0           clang --version
 34 Rust (optional)        1.78.0           rustc  !!  34 Rust (optional)        1.62.0           rustc --version
 35 bindgen (optional)     0.65.1           bindge !!  35 bindgen (optional)     0.56.0           bindgen --version
 36 GNU make               4.0              make - !!  36 GNU make               3.82             make --version
 37 bash                   4.2              bash -     37 bash                   4.2              bash --version
 38 binutils               2.25             ld -v  !!  38 binutils               2.23             ld -v
 39 flex                   2.5.35           flex -     39 flex                   2.5.35           flex --version
 40 bison                  2.0              bison      40 bison                  2.0              bison --version
 41 pahole                 1.16             pahole     41 pahole                 1.16             pahole --version
 42 util-linux             2.10o            mount  !!  42 util-linux             2.10o            fdformat --version
 43 kmod                   13               depmod     43 kmod                   13               depmod -V
 44 e2fsprogs              1.41.4           e2fsck     44 e2fsprogs              1.41.4           e2fsck -V
 45 jfsutils               1.1.3            fsck.j     45 jfsutils               1.1.3            fsck.jfs -V
 46 reiserfsprogs          3.6.3            reiser     46 reiserfsprogs          3.6.3            reiserfsck -V
 47 xfsprogs               2.6.0            xfs_db     47 xfsprogs               2.6.0            xfs_db -V
 48 squashfs-tools         4.0              mksqua     48 squashfs-tools         4.0              mksquashfs -version
 49 btrfs-progs            0.18             btrfsc     49 btrfs-progs            0.18             btrfsck
 50 pcmciautils            004              pccard     50 pcmciautils            004              pccardctl -V
 51 quota-tools            3.09             quota      51 quota-tools            3.09             quota -V
 52 PPP                    2.4.0            pppd -     52 PPP                    2.4.0            pppd --version
 53 nfs-utils              1.0.5            showmo     53 nfs-utils              1.0.5            showmount --version
 54 procps                 3.2.0            ps --v     54 procps                 3.2.0            ps --version
 55 udev                   081              udevd      55 udev                   081              udevd --version
 56 grub                   0.93             grub -     56 grub                   0.93             grub --version || grub-install --version
 57 mcelog                 0.6              mcelog     57 mcelog                 0.6              mcelog --version
 58 iptables               1.4.2            iptabl     58 iptables               1.4.2            iptables -V
 59 openssl & libcrypto    1.0.0            openss     59 openssl & libcrypto    1.0.0            openssl version
 60 bc                     1.06.95          bc --v     60 bc                     1.06.95          bc --version
 61 Sphinx\ [#f1]_         2.4.4            sphinx !!  61 Sphinx\ [#f1]_         1.7              sphinx-build --version
 62 cpio                   any              cpio -     62 cpio                   any              cpio --version
 63 GNU tar                1.28             tar -- << 
 64 gtags (optional)       6.6.5            gtags      63 gtags (optional)       6.6.5            gtags --version
 65 mkimage (optional)     2017.01          mkimag << 
 66 Python (optional)      3.5.x            python << 
 67 ====================== ===============  ======     64 ====================== ===============  ========================================
 68                                                    65 
 69 .. [#f1] Sphinx is needed only to build the Ke     66 .. [#f1] Sphinx is needed only to build the Kernel documentation
 70                                                    67 
 71 Kernel compilation                                 68 Kernel compilation
 72 ******************                                 69 ******************
 73                                                    70 
 74 GCC                                                71 GCC
 75 ---                                                72 ---
 76                                                    73 
 77 The gcc version requirements may vary dependin     74 The gcc version requirements may vary depending on the type of CPU in your
 78 computer.                                          75 computer.
 79                                                    76 
 80 Clang/LLVM (optional)                              77 Clang/LLVM (optional)
 81 ---------------------                              78 ---------------------
 82                                                    79 
 83 The latest formal release of clang and LLVM ut     80 The latest formal release of clang and LLVM utils (according to
 84 `releases.llvm.org <https://releases.llvm.org>     81 `releases.llvm.org <https://releases.llvm.org>`_) are supported for building
 85 kernels. Older releases aren't guaranteed to w     82 kernels. Older releases aren't guaranteed to work, and we may drop workarounds
 86 from the kernel that were used to support olde     83 from the kernel that were used to support older versions. Please see additional
 87 docs on :ref:`Building Linux with Clang/LLVM <     84 docs on :ref:`Building Linux with Clang/LLVM <kbuild_llvm>`.
 88                                                    85 
 89 Rust (optional)                                    86 Rust (optional)
 90 ---------------                                    87 ---------------
 91                                                    88 
 92 A recent version of the Rust compiler is requi !!  89 A particular version of the Rust toolchain is required. Newer versions may or
                                                   >>  90 may not work because the kernel depends on some unstable Rust features, for
                                                   >>  91 the moment.
                                                   >>  92 
                                                   >>  93 Each Rust toolchain comes with several "components", some of which are required
                                                   >>  94 (like ``rustc``) and some that are optional. The ``rust-src`` component (which
                                                   >>  95 is optional) needs to be installed to build the kernel. Other components are
                                                   >>  96 useful for developing.
 93                                                    97 
 94 Please see Documentation/rust/quick-start.rst      98 Please see Documentation/rust/quick-start.rst for instructions on how to
 95 satisfy the build requirements of Rust support     99 satisfy the build requirements of Rust support. In particular, the ``Makefile``
 96 target ``rustavailable`` is useful to check wh    100 target ``rustavailable`` is useful to check why the Rust toolchain may not
 97 be detected.                                      101 be detected.
 98                                                   102 
 99 bindgen (optional)                                103 bindgen (optional)
100 ------------------                                104 ------------------
101                                                   105 
102 ``bindgen`` is used to generate the Rust bindi    106 ``bindgen`` is used to generate the Rust bindings to the C side of the kernel.
103 It depends on ``libclang``.                       107 It depends on ``libclang``.
104                                                   108 
105 Make                                              109 Make
106 ----                                              110 ----
107                                                   111 
108 You will need GNU make 4.0 or later to build t !! 112 You will need GNU make 3.82 or later to build the kernel.
109                                                   113 
110 Bash                                              114 Bash
111 ----                                              115 ----
112                                                   116 
113 Some bash scripts are used for the kernel buil    117 Some bash scripts are used for the kernel build.
114 Bash 4.2 or newer is needed.                      118 Bash 4.2 or newer is needed.
115                                                   119 
116 Binutils                                          120 Binutils
117 --------                                          121 --------
118                                                   122 
119 Binutils 2.25 or newer is needed to build the  !! 123 Binutils 2.23 or newer is needed to build the kernel.
120                                                   124 
121 pkg-config                                        125 pkg-config
122 ----------                                        126 ----------
123                                                   127 
124 The build system, as of 4.18, requires pkg-con    128 The build system, as of 4.18, requires pkg-config to check for installed
125 kconfig tools and to determine flags settings     129 kconfig tools and to determine flags settings for use in
126 'make {g,x}config'.  Previously pkg-config was    130 'make {g,x}config'.  Previously pkg-config was being used but not
127 verified or documented.                           131 verified or documented.
128                                                   132 
129 Flex                                              133 Flex
130 ----                                              134 ----
131                                                   135 
132 Since Linux 4.16, the build system generates l    136 Since Linux 4.16, the build system generates lexical analyzers
133 during build.  This requires flex 2.5.35 or la    137 during build.  This requires flex 2.5.35 or later.
134                                                   138 
135                                                   139 
136 Bison                                             140 Bison
137 -----                                             141 -----
138                                                   142 
139 Since Linux 4.16, the build system generates p    143 Since Linux 4.16, the build system generates parsers
140 during build.  This requires bison 2.0 or late    144 during build.  This requires bison 2.0 or later.
141                                                   145 
142 pahole                                         !! 146 pahole:
143 ------                                         !! 147 -------
144                                                   148 
145 Since Linux 5.2, if CONFIG_DEBUG_INFO_BTF is s    149 Since Linux 5.2, if CONFIG_DEBUG_INFO_BTF is selected, the build system
146 generates BTF (BPF Type Format) from DWARF in     150 generates BTF (BPF Type Format) from DWARF in vmlinux, a bit later from kernel
147 modules as well.  This requires pahole v1.16 o    151 modules as well.  This requires pahole v1.16 or later.
148                                                   152 
149 It is found in the 'dwarves' or 'pahole' distr    153 It is found in the 'dwarves' or 'pahole' distro packages or from
150 https://fedorapeople.org/~acme/dwarves/.          154 https://fedorapeople.org/~acme/dwarves/.
151                                                   155 
152 Perl                                              156 Perl
153 ----                                              157 ----
154                                                   158 
155 You will need perl 5 and the following modules    159 You will need perl 5 and the following modules: ``Getopt::Long``,
156 ``Getopt::Std``, ``File::Basename``, and ``Fil    160 ``Getopt::Std``, ``File::Basename``, and ``File::Find`` to build the kernel.
157                                                   161 
158 BC                                                162 BC
159 --                                                163 --
160                                                   164 
161 You will need bc to build kernels 3.10 and hig    165 You will need bc to build kernels 3.10 and higher
162                                                   166 
163                                                   167 
164 OpenSSL                                           168 OpenSSL
165 -------                                           169 -------
166                                                   170 
167 Module signing and external certificate handli    171 Module signing and external certificate handling use the OpenSSL program and
168 crypto library to do key creation and signatur    172 crypto library to do key creation and signature generation.
169                                                   173 
170 You will need openssl to build kernels 3.7 and    174 You will need openssl to build kernels 3.7 and higher if module signing is
171 enabled.  You will also need openssl developme    175 enabled.  You will also need openssl development packages to build kernels 4.3
172 and higher.                                       176 and higher.
173                                                   177 
174 Tar                                            << 
175 ---                                            << 
176                                                << 
177 GNU tar is needed if you want to enable access << 
178 (CONFIG_IKHEADERS).                            << 
179                                                << 
180 gtags / GNU GLOBAL (optional)                     178 gtags / GNU GLOBAL (optional)
181 -----------------------------                     179 -----------------------------
182                                                   180 
183 The kernel build requires GNU GLOBAL version 6    181 The kernel build requires GNU GLOBAL version 6.6.5 or later to generate
184 tag files through ``make gtags``.  This is due    182 tag files through ``make gtags``.  This is due to its use of the gtags
185 ``-C (--directory)`` flag.                        183 ``-C (--directory)`` flag.
186                                                   184 
187 mkimage                                        << 
188 -------                                        << 
189                                                << 
190 This tool is used when building a Flat Image T << 
191 platforms. The tool is available via the ``u-b << 
192 built from the U-Boot source code. See the ins << 
193 https://docs.u-boot.org/en/latest/build/tools. << 
194                                                << 
195 System utilities                                  185 System utilities
196 ****************                                  186 ****************
197                                                   187 
198 Architectural changes                             188 Architectural changes
199 ---------------------                             189 ---------------------
200                                                   190 
201 DevFS has been obsoleted in favour of udev        191 DevFS has been obsoleted in favour of udev
202 (https://www.kernel.org/pub/linux/utils/kernel    192 (https://www.kernel.org/pub/linux/utils/kernel/hotplug/)
203                                                   193 
204 32-bit UID support is now in place.  Have fun!    194 32-bit UID support is now in place.  Have fun!
205                                                   195 
206 Linux documentation for functions is transitio    196 Linux documentation for functions is transitioning to inline
207 documentation via specially-formatted comments    197 documentation via specially-formatted comments near their
208 definitions in the source.  These comments can    198 definitions in the source.  These comments can be combined with ReST
209 files the Documentation/ directory to make enr    199 files the Documentation/ directory to make enriched documentation, which can
210 then be converted to PostScript, HTML, LaTex,     200 then be converted to PostScript, HTML, LaTex, ePUB and PDF files.
211 In order to convert from ReST format to a form    201 In order to convert from ReST format to a format of your choice, you'll need
212 Sphinx.                                           202 Sphinx.
213                                                   203 
214 Util-linux                                        204 Util-linux
215 ----------                                        205 ----------
216                                                   206 
217 New versions of util-linux provide ``fdisk`` s    207 New versions of util-linux provide ``fdisk`` support for larger disks,
218 support new options to mount, recognize more s    208 support new options to mount, recognize more supported partition
219 types, and similar goodies.                    !! 209 types, have a fdformat which works with 2.4 kernels, and similar goodies.
220 You'll probably want to upgrade.                  210 You'll probably want to upgrade.
221                                                   211 
222 Ksymoops                                          212 Ksymoops
223 --------                                          213 --------
224                                                   214 
225 If the unthinkable happens and your kernel oop    215 If the unthinkable happens and your kernel oopses, you may need the
226 ksymoops tool to decode it, but in most cases     216 ksymoops tool to decode it, but in most cases you don't.
227 It is generally preferred to build the kernel     217 It is generally preferred to build the kernel with ``CONFIG_KALLSYMS`` so
228 that it produces readable dumps that can be us    218 that it produces readable dumps that can be used as-is (this also
229 produces better output than ksymoops).  If for    219 produces better output than ksymoops).  If for some reason your kernel
230 is not build with ``CONFIG_KALLSYMS`` and you     220 is not build with ``CONFIG_KALLSYMS`` and you have no way to rebuild and
231 reproduce the Oops with that option, then you     221 reproduce the Oops with that option, then you can still decode that Oops
232 with ksymoops.                                    222 with ksymoops.
233                                                   223 
234 Mkinitrd                                          224 Mkinitrd
235 --------                                          225 --------
236                                                   226 
237 These changes to the ``/lib/modules`` file tre    227 These changes to the ``/lib/modules`` file tree layout also require that
238 mkinitrd be upgraded.                             228 mkinitrd be upgraded.
239                                                   229 
240 E2fsprogs                                         230 E2fsprogs
241 ---------                                         231 ---------
242                                                   232 
243 The latest version of ``e2fsprogs`` fixes seve    233 The latest version of ``e2fsprogs`` fixes several bugs in fsck and
244 debugfs.  Obviously, it's a good idea to upgra    234 debugfs.  Obviously, it's a good idea to upgrade.
245                                                   235 
246 JFSutils                                          236 JFSutils
247 --------                                          237 --------
248                                                   238 
249 The ``jfsutils`` package contains the utilitie    239 The ``jfsutils`` package contains the utilities for the file system.
250 The following utilities are available:            240 The following utilities are available:
251                                                   241 
252 - ``fsck.jfs`` - initiate replay of the transa    242 - ``fsck.jfs`` - initiate replay of the transaction log, and check
253   and repair a JFS formatted partition.           243   and repair a JFS formatted partition.
254                                                   244 
255 - ``mkfs.jfs`` - create a JFS formatted partit    245 - ``mkfs.jfs`` - create a JFS formatted partition.
256                                                   246 
257 - other file system utilities are also availab    247 - other file system utilities are also available in this package.
258                                                   248 
259 Reiserfsprogs                                     249 Reiserfsprogs
260 -------------                                     250 -------------
261                                                   251 
262 The reiserfsprogs package should be used for r    252 The reiserfsprogs package should be used for reiserfs-3.6.x
263 (Linux kernels 2.4.x). It is a combined packag    253 (Linux kernels 2.4.x). It is a combined package and contains working
264 versions of ``mkreiserfs``, ``resize_reiserfs`    254 versions of ``mkreiserfs``, ``resize_reiserfs``, ``debugreiserfs`` and
265 ``reiserfsck``. These utils work on both i386     255 ``reiserfsck``. These utils work on both i386 and alpha platforms.
266                                                   256 
267 Xfsprogs                                          257 Xfsprogs
268 --------                                          258 --------
269                                                   259 
270 The latest version of ``xfsprogs`` contains ``    260 The latest version of ``xfsprogs`` contains ``mkfs.xfs``, ``xfs_db``, and the
271 ``xfs_repair`` utilities, among others, for th    261 ``xfs_repair`` utilities, among others, for the XFS filesystem.  It is
272 architecture independent and any version from     262 architecture independent and any version from 2.0.0 onward should
273 work correctly with this version of the XFS ke    263 work correctly with this version of the XFS kernel code (2.6.0 or
274 later is recommended, due to some significant     264 later is recommended, due to some significant improvements).
275                                                   265 
276 PCMCIAutils                                       266 PCMCIAutils
277 -----------                                       267 -----------
278                                                   268 
279 PCMCIAutils replaces ``pcmcia-cs``. It properl    269 PCMCIAutils replaces ``pcmcia-cs``. It properly sets up
280 PCMCIA sockets at system startup and loads the    270 PCMCIA sockets at system startup and loads the appropriate modules
281 for 16-bit PCMCIA devices if the kernel is mod    271 for 16-bit PCMCIA devices if the kernel is modularized and the hotplug
282 subsystem is used.                                272 subsystem is used.
283                                                   273 
284 Quota-tools                                       274 Quota-tools
285 -----------                                       275 -----------
286                                                   276 
287 Support for 32 bit uid's and gid's is required    277 Support for 32 bit uid's and gid's is required if you want to use
288 the newer version 2 quota format.  Quota-tools    278 the newer version 2 quota format.  Quota-tools version 3.07 and
289 newer has this support.  Use the recommended v    279 newer has this support.  Use the recommended version or newer
290 from the table above.                             280 from the table above.
291                                                   281 
292 Intel IA32 microcode                              282 Intel IA32 microcode
293 --------------------                              283 --------------------
294                                                   284 
295 A driver has been added to allow updating of I    285 A driver has been added to allow updating of Intel IA32 microcode,
296 accessible as a normal (misc) character device    286 accessible as a normal (misc) character device.  If you are not using
297 udev you may need to::                            287 udev you may need to::
298                                                   288 
299   mkdir /dev/cpu                                  289   mkdir /dev/cpu
300   mknod /dev/cpu/microcode c 10 184               290   mknod /dev/cpu/microcode c 10 184
301   chmod 0644 /dev/cpu/microcode                   291   chmod 0644 /dev/cpu/microcode
302                                                   292 
303 as root before you can use this.  You'll proba    293 as root before you can use this.  You'll probably also want to
304 get the user-space microcode_ctl utility to us    294 get the user-space microcode_ctl utility to use with this.
305                                                   295 
306 udev                                              296 udev
307 ----                                              297 ----
308                                                   298 
309 ``udev`` is a userspace application for popula    299 ``udev`` is a userspace application for populating ``/dev`` dynamically with
310 only entries for devices actually present. ``u    300 only entries for devices actually present. ``udev`` replaces the basic
311 functionality of devfs, while allowing persist    301 functionality of devfs, while allowing persistent device naming for
312 devices.                                          302 devices.
313                                                   303 
314 FUSE                                              304 FUSE
315 ----                                              305 ----
316                                                   306 
317 Needs libfuse 2.4.0 or later.  Absolute minimu    307 Needs libfuse 2.4.0 or later.  Absolute minimum is 2.3.0 but mount
318 options ``direct_io`` and ``kernel_cache`` won    308 options ``direct_io`` and ``kernel_cache`` won't work.
319                                                   309 
320 Networking                                        310 Networking
321 **********                                        311 **********
322                                                   312 
323 General changes                                   313 General changes
324 ---------------                                   314 ---------------
325                                                   315 
326 If you have advanced network configuration nee    316 If you have advanced network configuration needs, you should probably
327 consider using the network tools from ip-route    317 consider using the network tools from ip-route2.
328                                                   318 
329 Packet Filter / NAT                               319 Packet Filter / NAT
330 -------------------                               320 -------------------
331 The packet filtering and NAT code uses the sam    321 The packet filtering and NAT code uses the same tools like the previous 2.4.x
332 kernel series (iptables).  It still includes b    322 kernel series (iptables).  It still includes backwards-compatibility modules
333 for 2.2.x-style ipchains and 2.0.x-style ipfwa    323 for 2.2.x-style ipchains and 2.0.x-style ipfwadm.
334                                                   324 
335 PPP                                               325 PPP
336 ---                                               326 ---
337                                                   327 
338 The PPP driver has been restructured to suppor    328 The PPP driver has been restructured to support multilink and to
339 enable it to operate over diverse media layers    329 enable it to operate over diverse media layers.  If you use PPP,
340 upgrade pppd to at least 2.4.0.                   330 upgrade pppd to at least 2.4.0.
341                                                   331 
342 If you are not using udev, you must have the d    332 If you are not using udev, you must have the device file /dev/ppp
343 which can be made by::                            333 which can be made by::
344                                                   334 
345   mknod /dev/ppp c 108 0                          335   mknod /dev/ppp c 108 0
346                                                   336 
347 as root.                                          337 as root.
348                                                   338 
349 NFS-utils                                         339 NFS-utils
350 ---------                                         340 ---------
351                                                   341 
352 In ancient (2.4 and earlier) kernels, the nfs     342 In ancient (2.4 and earlier) kernels, the nfs server needed to know
353 about any client that expected to be able to a    343 about any client that expected to be able to access files via NFS.  This
354 information would be given to the kernel by ``    344 information would be given to the kernel by ``mountd`` when the client
355 mounted the filesystem, or by ``exportfs`` at     345 mounted the filesystem, or by ``exportfs`` at system startup.  exportfs
356 would take information about active clients fr    346 would take information about active clients from ``/var/lib/nfs/rmtab``.
357                                                   347 
358 This approach is quite fragile as it depends o    348 This approach is quite fragile as it depends on rmtab being correct
359 which is not always easy, particularly when tr    349 which is not always easy, particularly when trying to implement
360 fail-over.  Even when the system is working we    350 fail-over.  Even when the system is working well, ``rmtab`` suffers from
361 getting lots of old entries that never get rem    351 getting lots of old entries that never get removed.
362                                                   352 
363 With modern kernels we have the option of havi    353 With modern kernels we have the option of having the kernel tell mountd
364 when it gets a request from an unknown host, a    354 when it gets a request from an unknown host, and mountd can give
365 appropriate export information to the kernel.     355 appropriate export information to the kernel.  This removes the
366 dependency on ``rmtab`` and means that the ker    356 dependency on ``rmtab`` and means that the kernel only needs to know about
367 currently active clients.                         357 currently active clients.
368                                                   358 
369 To enable this new functionality, you need to:    359 To enable this new functionality, you need to::
370                                                   360 
371   mount -t nfsd nfsd /proc/fs/nfsd                361   mount -t nfsd nfsd /proc/fs/nfsd
372                                                   362 
373 before running exportfs or mountd.  It is reco    363 before running exportfs or mountd.  It is recommended that all NFS
374 services be protected from the internet-at-lar    364 services be protected from the internet-at-large by a firewall where
375 that is possible.                                 365 that is possible.
376                                                   366 
377 mcelog                                            367 mcelog
378 ------                                            368 ------
379                                                   369 
380 On x86 kernels the mcelog utility is needed to    370 On x86 kernels the mcelog utility is needed to process and log machine check
381 events when ``CONFIG_X86_MCE`` is enabled. Mac    371 events when ``CONFIG_X86_MCE`` is enabled. Machine check events are errors
382 reported by the CPU. Processing them is strong    372 reported by the CPU. Processing them is strongly encouraged.
383                                                   373 
384 Kernel documentation                              374 Kernel documentation
385 ********************                              375 ********************
386                                                   376 
387 Sphinx                                            377 Sphinx
388 ------                                            378 ------
389                                                   379 
390 Please see :ref:`sphinx_install` in :ref:`Docu    380 Please see :ref:`sphinx_install` in :ref:`Documentation/doc-guide/sphinx.rst <sphinxdoc>`
391 for details about Sphinx requirements.            381 for details about Sphinx requirements.
392                                                   382 
393 rustdoc                                           383 rustdoc
394 -------                                           384 -------
395                                                   385 
396 ``rustdoc`` is used to generate the documentat    386 ``rustdoc`` is used to generate the documentation for Rust code. Please see
397 Documentation/rust/general-information.rst for    387 Documentation/rust/general-information.rst for more information.
398                                                   388 
399 Getting updated software                          389 Getting updated software
400 ========================                          390 ========================
401                                                   391 
402 Kernel compilation                                392 Kernel compilation
403 ******************                                393 ******************
404                                                   394 
405 gcc                                               395 gcc
406 ---                                               396 ---
407                                                   397 
408 - <ftp://ftp.gnu.org/gnu/gcc/>                    398 - <ftp://ftp.gnu.org/gnu/gcc/>
409                                                   399 
410 Clang/LLVM                                        400 Clang/LLVM
411 ----------                                        401 ----------
412                                                   402 
413 - :ref:`Getting LLVM <getting_llvm>`.             403 - :ref:`Getting LLVM <getting_llvm>`.
414                                                   404 
415 Rust                                              405 Rust
416 ----                                              406 ----
417                                                   407 
418 - Documentation/rust/quick-start.rst.             408 - Documentation/rust/quick-start.rst.
419                                                   409 
420 bindgen                                           410 bindgen
421 -------                                           411 -------
422                                                   412 
423 - Documentation/rust/quick-start.rst.             413 - Documentation/rust/quick-start.rst.
424                                                   414 
425 Make                                              415 Make
426 ----                                              416 ----
427                                                   417 
428 - <ftp://ftp.gnu.org/gnu/make/>                   418 - <ftp://ftp.gnu.org/gnu/make/>
429                                                   419 
430 Bash                                              420 Bash
431 ----                                              421 ----
432                                                   422 
433 - <ftp://ftp.gnu.org/gnu/bash/>                   423 - <ftp://ftp.gnu.org/gnu/bash/>
434                                                   424 
435 Binutils                                          425 Binutils
436 --------                                          426 --------
437                                                   427 
438 - <https://www.kernel.org/pub/linux/devel/binu    428 - <https://www.kernel.org/pub/linux/devel/binutils/>
439                                                   429 
440 Flex                                              430 Flex
441 ----                                              431 ----
442                                                   432 
443 - <https://github.com/westes/flex/releases>       433 - <https://github.com/westes/flex/releases>
444                                                   434 
445 Bison                                             435 Bison
446 -----                                             436 -----
447                                                   437 
448 - <ftp://ftp.gnu.org/gnu/bison/>                  438 - <ftp://ftp.gnu.org/gnu/bison/>
449                                                   439 
450 OpenSSL                                           440 OpenSSL
451 -------                                           441 -------
452                                                   442 
453 - <https://www.openssl.org/>                      443 - <https://www.openssl.org/>
454                                                   444 
455 System utilities                                  445 System utilities
456 ****************                                  446 ****************
457                                                   447 
458 Util-linux                                        448 Util-linux
459 ----------                                        449 ----------
460                                                   450 
461 - <https://www.kernel.org/pub/linux/utils/util    451 - <https://www.kernel.org/pub/linux/utils/util-linux/>
462                                                   452 
463 Kmod                                              453 Kmod
464 ----                                              454 ----
465                                                   455 
466 - <https://www.kernel.org/pub/linux/utils/kern    456 - <https://www.kernel.org/pub/linux/utils/kernel/kmod/>
467 - <https://git.kernel.org/pub/scm/utils/kernel    457 - <https://git.kernel.org/pub/scm/utils/kernel/kmod/kmod.git>
468                                                   458 
469 Ksymoops                                          459 Ksymoops
470 --------                                          460 --------
471                                                   461 
472 - <https://www.kernel.org/pub/linux/utils/kern    462 - <https://www.kernel.org/pub/linux/utils/kernel/ksymoops/v2.4/>
473                                                   463 
474 Mkinitrd                                          464 Mkinitrd
475 --------                                          465 --------
476                                                   466 
477 - <https://code.launchpad.net/initrd-tools/mai    467 - <https://code.launchpad.net/initrd-tools/main>
478                                                   468 
479 E2fsprogs                                         469 E2fsprogs
480 ---------                                         470 ---------
481                                                   471 
482 - <https://www.kernel.org/pub/linux/kernel/peo    472 - <https://www.kernel.org/pub/linux/kernel/people/tytso/e2fsprogs/>
483 - <https://git.kernel.org/pub/scm/fs/ext2/e2fs    473 - <https://git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git/>
484                                                   474 
485 JFSutils                                          475 JFSutils
486 --------                                          476 --------
487                                                   477 
488 - <https://jfs.sourceforge.net/>               !! 478 - <http://jfs.sourceforge.net/>
489                                                   479 
490 Reiserfsprogs                                     480 Reiserfsprogs
491 -------------                                     481 -------------
492                                                   482 
493 - <https://git.kernel.org/pub/scm/linux/kernel    483 - <https://git.kernel.org/pub/scm/linux/kernel/git/jeffm/reiserfsprogs.git/>
494                                                   484 
495 Xfsprogs                                          485 Xfsprogs
496 --------                                          486 --------
497                                                   487 
498 - <https://git.kernel.org/pub/scm/fs/xfs/xfspr    488 - <https://git.kernel.org/pub/scm/fs/xfs/xfsprogs-dev.git>
499 - <https://www.kernel.org/pub/linux/utils/fs/x    489 - <https://www.kernel.org/pub/linux/utils/fs/xfs/xfsprogs/>
500                                                   490 
501 Pcmciautils                                       491 Pcmciautils
502 -----------                                       492 -----------
503                                                   493 
504 - <https://www.kernel.org/pub/linux/utils/kern    494 - <https://www.kernel.org/pub/linux/utils/kernel/pcmcia/>
505                                                   495 
506 Quota-tools                                       496 Quota-tools
507 -----------                                       497 -----------
508                                                   498 
509 - <https://sourceforge.net/projects/linuxquota !! 499 - <http://sourceforge.net/projects/linuxquota/>
510                                                   500 
511                                                   501 
512 Intel P6 microcode                                502 Intel P6 microcode
513 ------------------                                503 ------------------
514                                                   504 
515 - <https://downloadcenter.intel.com/>             505 - <https://downloadcenter.intel.com/>
516                                                   506 
517 udev                                              507 udev
518 ----                                              508 ----
519                                                   509 
520 - <https://www.freedesktop.org/software/system    510 - <https://www.freedesktop.org/software/systemd/man/udev.html>
521                                                   511 
522 FUSE                                              512 FUSE
523 ----                                              513 ----
524                                                   514 
525 - <https://github.com/libfuse/libfuse/releases    515 - <https://github.com/libfuse/libfuse/releases>
526                                                   516 
527 mcelog                                            517 mcelog
528 ------                                            518 ------
529                                                   519 
530 - <https://www.mcelog.org/>                    !! 520 - <http://www.mcelog.org/>
531                                                   521 
532 cpio                                              522 cpio
533 ----                                              523 ----
534                                                   524 
535 - <https://www.gnu.org/software/cpio/>            525 - <https://www.gnu.org/software/cpio/>
536                                                   526 
537 Networking                                        527 Networking
538 **********                                        528 **********
539                                                   529 
540 PPP                                               530 PPP
541 ---                                               531 ---
542                                                   532 
543 - <https://download.samba.org/pub/ppp/>           533 - <https://download.samba.org/pub/ppp/>
544 - <https://git.ozlabs.org/?p=ppp.git>             534 - <https://git.ozlabs.org/?p=ppp.git>
545 - <https://github.com/paulusmack/ppp/>            535 - <https://github.com/paulusmack/ppp/>
546                                                   536 
547 NFS-utils                                         537 NFS-utils
548 ---------                                         538 ---------
549                                                   539 
550 - <https://sourceforge.net/project/showfiles.p !! 540 - <http://sourceforge.net/project/showfiles.php?group_id=14>
551 - <https://nfs.sourceforge.net/>               << 
552                                                   541 
553 Iptables                                          542 Iptables
554 --------                                          543 --------
555                                                   544 
556 - <https://netfilter.org/projects/iptables/ind    545 - <https://netfilter.org/projects/iptables/index.html>
557                                                   546 
558 Ip-route2                                         547 Ip-route2
559 ---------                                         548 ---------
560                                                   549 
561 - <https://www.kernel.org/pub/linux/utils/net/    550 - <https://www.kernel.org/pub/linux/utils/net/iproute2/>
562                                                   551 
563 OProfile                                          552 OProfile
564 --------                                          553 --------
565                                                   554 
566 - <https://oprofile.sf.net/download/>          !! 555 - <http://oprofile.sf.net/download/>
                                                   >> 556 
                                                   >> 557 NFS-Utils
                                                   >> 558 ---------
                                                   >> 559 
                                                   >> 560 - <http://nfs.sourceforge.net/>
567                                                   561 
568 Kernel documentation                              562 Kernel documentation
569 ********************                              563 ********************
570                                                   564 
571 Sphinx                                            565 Sphinx
572 ------                                            566 ------
573                                                   567 
574 - <https://www.sphinx-doc.org/>                   568 - <https://www.sphinx-doc.org/>
                                                      

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