Commit 3519c4d6 authored by Nick Desaulniers's avatar Nick Desaulniers Committed by Jonathan Corbet

Documentation: add minimum clang/llvm version

Based on a vote at the LLVM BoF at Plumbers 2020, we decided to start
small, supporting just one formal upstream release of LLVM for now.

We can probably widen the support window of supported versions over
time.  Also, note that LLVM's release process is different than GCC's.
GCC tends to have 1 major release per year while releasing minor updates
to the past 3 major versions.  LLVM tends to support one major release
and one minor release every six months.
Signed-off-by: default avatarNick Desaulniers <ndesaulniers@google.com>
Tested-by: default avatarGustavo A. R. Silva <gustavoars@kernel.org>
Tested-by: default avatarNathan Chancellor <natechancellor@gmail.com>
Reviewed-by: default avatarKees Cook <keescook@chromium.org>
Reviewed-by: default avatarNathan Chancellor <natechancellor@gmail.com>
Reviewed-by: default avatarMasahiro Yamada <masahiroy@kernel.org>
Acked-by: default avatarWill Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20200826191555.3350406-1-ndesaulniers@google.comSigned-off-by: default avatarJonathan Corbet <corbet@lwn.net>
parent eb45fb2f
.. _kbuild_llvm:
============================== ==============================
Building Linux with Clang/LLVM Building Linux with Clang/LLVM
============================== ==============================
...@@ -73,6 +75,8 @@ Getting Help ...@@ -73,6 +75,8 @@ Getting Help
- `Wiki <https://github.com/ClangBuiltLinux/linux/wiki>`_ - `Wiki <https://github.com/ClangBuiltLinux/linux/wiki>`_
- `Beginner Bugs <https://github.com/ClangBuiltLinux/linux/issues?q=is%3Aopen+is%3Aissue+label%3A%22good+first+issue%22>`_ - `Beginner Bugs <https://github.com/ClangBuiltLinux/linux/issues?q=is%3Aopen+is%3Aissue+label%3A%22good+first+issue%22>`_
.. _getting_llvm:
Getting LLVM Getting LLVM
------------- -------------
......
...@@ -30,6 +30,7 @@ you probably needn't concern yourself with pcmciautils. ...@@ -30,6 +30,7 @@ you probably needn't concern yourself with pcmciautils.
Program Minimal version Command to check the version Program Minimal version Command to check the version
====================== =============== ======================================== ====================== =============== ========================================
GNU C 4.9 gcc --version GNU C 4.9 gcc --version
Clang/LLVM (optional) 10.0.1 clang --version
GNU make 3.81 make --version GNU make 3.81 make --version
binutils 2.23 ld -v binutils 2.23 ld -v
flex 2.5.35 flex --version flex 2.5.35 flex --version
...@@ -68,6 +69,15 @@ GCC ...@@ -68,6 +69,15 @@ GCC
The gcc version requirements may vary depending on the type of CPU in your The gcc version requirements may vary depending on the type of CPU in your
computer. computer.
Clang/LLVM (optional)
---------------------
The latest formal release of clang and LLVM utils (according to
`releases.llvm.org <https://releases.llvm.org>`_) are supported for building
kernels. Older releases aren't guaranteed to work, and we may drop workarounds
from the kernel that were used to support older versions. Please see additional
docs on :ref:`Building Linux with Clang/LLVM <kbuild_llvm>`.
Make Make
---- ----
...@@ -331,6 +341,11 @@ gcc ...@@ -331,6 +341,11 @@ gcc
- <ftp://ftp.gnu.org/gnu/gcc/> - <ftp://ftp.gnu.org/gnu/gcc/>
Clang/LLVM
----------
- :ref:`Getting LLVM <getting_llvm>`.
Make Make
---- ----
......
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