sphinx.addnodesdocument)}( rawsource children]( translations
LanguagesNode)}(hhh](h pending_xref)}(hhh]docutils.nodesTextChinese (Simplified)}parenthsba
attributes}(ids]classes]names]dupnames]backrefs] refdomainstdreftypedoc reftarget /translations/zh_CN/kbuild/llvmmodnameN classnameN refexplicitutagnamehhh ubh)}(hhh]hChinese (Traditional)}hh2sbah }(h ]h ]h"]h$]h&] refdomainh)reftypeh+ reftarget /translations/zh_TW/kbuild/llvmmodnameN classnameN refexplicituh1hhh ubh)}(hhh]hItalian}hhFsbah }(h ]h ]h"]h$]h&] refdomainh)reftypeh+ reftarget /translations/it_IT/kbuild/llvmmodnameN classnameN refexplicituh1hhh ubh)}(hhh]hJapanese}hhZsbah }(h ]h ]h"]h$]h&] refdomainh)reftypeh+ reftarget /translations/ja_JP/kbuild/llvmmodnameN classnameN refexplicituh1hhh ubh)}(hhh]hKorean}hhnsbah }(h ]h ]h"]h$]h&] refdomainh)reftypeh+ reftarget /translations/ko_KR/kbuild/llvmmodnameN classnameN refexplicituh1hhh ubh)}(hhh]hPortuguese (Brazilian)}hhsbah }(h ]h ]h"]h$]h&] refdomainh)reftypeh+ reftarget /translations/pt_BR/kbuild/llvmmodnameN classnameN refexplicituh1hhh ubh)}(hhh]hSpanish}hhsbah }(h ]h ]h"]h$]h&] refdomainh)reftypeh+ reftarget /translations/sp_SP/kbuild/llvmmodnameN classnameN refexplicituh1hhh ubeh }(h ]h ]h"]h$]h&]current_languageEnglishuh1h
hh _documenthsourceNlineNubhtarget)}(h.. _kbuild_llvm:h]h }(h ]h ]h"]h$]h&]refid kbuild-llvmuh1hhKhhhhh9/var/lib/git/docbuild/linux/Documentation/kbuild/llvm.rstubhsection)}(hhh](htitle)}(h Building Linux with Clang/LLVMh]h Building Linux with Clang/LLVM}(hhhhhNhNubah }(h ]h ]h"]h$]h&]uh1hhhhhhhhKubh paragraph)}(hQThis document covers how to build the Linux kernel with Clang and LLVM
utilities.h]hQThis document covers how to build the Linux kernel with Clang and LLVM
utilities.}(hhhhhNhNubah }(h ]h ]h"]h$]h&]uh1hhhhKhhhhubh)}(hhh](h)}(hAbouth]hAbout}(hhhhhNhNubah }(h ]h ]h"]h$]h&]uh1hhhhhhhhK ubh)}(hX' The Linux kernel has always traditionally been compiled with GNU toolchains
such as GCC and binutils. Ongoing work has allowed for `Clang
`_ and `LLVM `_ utilities to be
used as viable substitutes. Distributions such as `Android
`_, `ChromeOS
`_, `OpenMandriva
`_, and `Chimera Linux
`_ use Clang built kernels. Google's and Meta's
datacenter fleets also run kernels built with Clang.h](hThe Linux kernel has always traditionally been compiled with GNU toolchains
such as GCC and binutils. Ongoing work has allowed for }(hhhhhNhNubh reference)}(h"`Clang
`_h]hClang}(hj hhhNhNubah }(h ]h ]h"]h$]h&]nameClangrefurihttps://clang.llvm.org/uh1j hhubh)}(h
h]h }(h ]clangah ]h"]clangah$]h&]refurij uh1h
referencedKhhubh and }(hhhhhNhNubj )}(h`LLVM `_h]hLLVM}(hj( hhhNhNubah }(h ]h ]h"]h$]h&]nameLLVMj https://llvm.org/uh1j hhubh)}(h h]h }(h ]llvmah ]h"]llvmah$]h&]refurij8 uh1hj# KhhubhC utilities to be
used as viable substitutes. Distributions such as }(hhhhhNhNubj )}(h%`Android
`_h]hAndroid}(hjJ hhhNhNubah }(h ]h ]h"]h$]h&]nameAndroidj https://www.android.com/uh1j hhubh)}(h
h]h }(h ]androidah ]h"]androidah$]h&]refurijZ uh1hj# Khhubh, }(hhhhhNhNubj )}(h2`ChromeOS
`_h]hChromeOS}(hjl hhhNhNubah }(h ]h ]h"]h$]h&]nameChromeOSj $https://www.chromium.org/chromium-osuh1j hhubh)}(h'
h]h }(h ]chromeosah ]h"]chromeosah$]h&]refurij| uh1hj# Khhubh, }hhsbj )}(h/`OpenMandriva
`_h]h OpenMandriva}(hj hhhNhNubah }(h ]h ]h"]h$]h&]name OpenMandrivaj https://www.openmandriva.org/uh1j hhubh)}(h
h]h }(h ] openmandrivaah ]h"] openmandrivaah$]h&]refurij uh1hj# Khhubh, and }(hhhhhNhNubj )}(h-`Chimera Linux
`_h]h
Chimera Linux}(hj hhhNhNubah }(h ]h ]h"]h$]h&]name
Chimera Linuxj https://chimera-linux.org/uh1j hhubh)}(h
h]h }(h ]
chimera-linuxah ]h"]
chimera linuxah$]h&]refurij uh1hj# Khhubhf use Clang built kernels. Google’s and Meta’s
datacenter fleets also run kernels built with Clang.}(hhhhhNhNubeh }(h ]h ]h"]h$]h&]uh1hhhhK
hhhhubh)}(hX `LLVM is a collection of toolchain components implemented in terms of C++
objects `_. Clang is a front-end to LLVM
that supports C and the GNU C extensions required by the kernel, and is
pronounced "klang," not "see-lang."h](j )}(h{`LLVM is a collection of toolchain components implemented in terms of C++
objects `_h]hPLLVM is a collection of toolchain components implemented in terms of C++
objects}(hj hhhNhNubah }(h ]h ]h"]h$]h&]namePLLVM is a collection of toolchain components implemented in terms of C++ objectsj %https://www.aosabook.org/en/llvm.htmluh1j hj ubh)}(h( h]h }(h ]Nllvm-is-a-collection-of-toolchain-components-implemented-in-terms-of-c-objectsah ]h"]Pllvm is a collection of toolchain components implemented in terms of c++ objectsah$]h&]refurij uh1hj# Khj ubh. Clang is a front-end to LLVM
that supports C and the GNU C extensions required by the kernel, and is
pronounced “klang,” not “see-lang.”}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1hhhhKhhhhubeh }(h ]aboutah ]h"]aboutah$]h&]uh1hhhhhhhhK ubh)}(hhh](h)}(hBuilding with LLVMh]hBuilding with LLVM}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1hhj hhhhhK ubh)}(hInvoke ``make`` via::h](hInvoke }(hj hhhNhNubhliteral)}(h``make``h]hmake}(hj' hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hj ubh via:}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1hhhhK hj hhubh
literal_block)}(h make LLVM=1h]h make LLVM=1}hjA sbah }(h ]h ]h"]h$]h&] xml:spacepreserveuh1j? hhhK!hj hhubh)}(h5to compile for the host target. For cross compiling::h]h4to compile for the host target. For cross compiling:}(hjQ hhhNhNubah }(h ]h ]h"]h$]h&]uh1hhhhK#hj hhubj@ )}(hmake LLVM=1 ARCH=arm64h]hmake LLVM=1 ARCH=arm64}hj_ sbah }(h ]h ]h"]h$]h&]jO jP uh1j? hhhK%hj hhubeh }(h ]building-with-llvmah ]h"]building with llvmah$]h&]uh1hhhhhhhhK ubh)}(hhh](h)}(hThe LLVM= argumenth]hThe LLVM= argument}(hjx hhhNhNubah }(h ]h ]h"]h$]h&]uh1hhju hhhhhK(ubh)}(h~LLVM has substitutes for GNU binutils utilities. They can be enabled
individually. The full list of supported make variables::h]h}LLVM has substitutes for GNU binutils utilities. They can be enabled
individually. The full list of supported make variables:}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1hhhhK*hju hhubj@ )}(hmake CC=clang LD=ld.lld AR=llvm-ar NM=llvm-nm STRIP=llvm-strip \
OBJCOPY=llvm-objcopy OBJDUMP=llvm-objdump READELF=llvm-readelf \
HOSTCC=clang HOSTCXX=clang++ HOSTAR=llvm-ar HOSTLD=ld.lldh]hmake CC=clang LD=ld.lld AR=llvm-ar NM=llvm-nm STRIP=llvm-strip \
OBJCOPY=llvm-objcopy OBJDUMP=llvm-objdump READELF=llvm-readelf \
HOSTCC=clang HOSTCXX=clang++ HOSTAR=llvm-ar HOSTLD=ld.lld}hj sbah }(h ]h ]h"]h$]h&]jO jP uh1j? hhhK-hju hhubh)}(h ``LLVM=1`` expands to the above.h](j& )}(h
``LLVM=1``h]hLLVM=1}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hj ubh expands to the above.}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1hhhhK1hju hhubh)}(hIf your LLVM tools are not available in your PATH, you can supply their
location using the LLVM variable with a trailing slash::h]hIf your LLVM tools are not available in your PATH, you can supply their
location using the LLVM variable with a trailing slash:}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1hhhhK3hju hhubj@ )}(hmake LLVM=/path/to/llvm/h]hmake LLVM=/path/to/llvm/}hj sbah }(h ]h ]h"]h$]h&]jO jP uh1j? hhhK6hju hhubh)}(hgwhich will use ``/path/to/llvm/clang``, ``/path/to/llvm/ld.lld``, etc. The
following may also be used::h](hwhich will use }(hj hhhNhNubj& )}(h``/path/to/llvm/clang``h]h/path/to/llvm/clang}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hj ubh, }(hj hhhNhNubj& )}(h``/path/to/llvm/ld.lld``h]h/path/to/llvm/ld.lld}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hj ubh&, etc. The
following may also be used:}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1hhhhK8hju hhubj@ )}(h$PATH=/path/to/llvm:$PATH make LLVM=1h]h$PATH=/path/to/llvm:$PATH make LLVM=1}hj sbah }(h ]h ]h"]h$]h&]jO jP uh1j? hhhK;hju hhubh)}(hIf your LLVM tools have a version suffix and you want to test with that
explicit version rather than the unsuffixed executables like ``LLVM=1``, you
can pass the suffix using the ``LLVM`` variable::h](hIf your LLVM tools have a version suffix and you want to test with that
explicit version rather than the unsuffixed executables like }(hj hhhNhNubj& )}(h
``LLVM=1``h]hLLVM=1}(hj" hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hj ubh$, you
can pass the suffix using the }(hj hhhNhNubj& )}(h``LLVM``h]hLLVM}(hj4 hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hj ubh
variable:}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1hhhhK=hju hhubj@ )}(h
make LLVM=-14h]h
make LLVM=-14}hjL sbah }(h ]h ]h"]h$]h&]jO jP uh1j? hhhKAhju hhubh)}(h0which will use ``clang-14``, ``ld.lld-14``, etc.h](hwhich will use }(hjZ hhhNhNubj& )}(h ``clang-14``h]hclang-14}(hjb hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hjZ ubh, }(hjZ hhhNhNubj& )}(h
``ld.lld-14``h]h ld.lld-14}(hjt hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hjZ ubh, etc.}(hjZ hhhNhNubeh }(h ]h ]h"]h$]h&]uh1hhhhKChju hhubh)}(hRTo support combinations of out of tree paths with version suffixes, we
recommend::h]hQTo support combinations of out of tree paths with version suffixes, we
recommend:}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1hhhhKEhju hhubj@ )}(h'PATH=/path/to/llvm/:$PATH make LLVM=-14h]h'PATH=/path/to/llvm/:$PATH make LLVM=-14}hj sbah }(h ]h ]h"]h$]h&]jO jP uh1j? hhhKHhju hhubh)}(hThe same value used for ``LLVM=`` should be set for each invocation of ``make``
if configuring and building via distinct commands. ``LLVM=`` should also be set
as an environment variable when running scripts that will eventually run
``make``.h](hThe same value used for }(hj hhhNhNubj& )}(h ``LLVM=``h]hLLVM=}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hj ubh& should be set for each invocation of }(hj hhhNhNubj& )}(h``make``h]hmake}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hj ubh4
if configuring and building via distinct commands. }(hj hhhNhNubj& )}(h ``LLVM=``h]hLLVM=}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hj ubh] should also be set
as an environment variable when running scripts that will eventually run
}(hj hhhNhNubj& )}(h``make``h]hmake}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hj ubh.}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1hhhhKJhju hhubeh }(h ]the-llvm-argumentah ]h"]the llvm= argumentah$]h&]uh1hhhhhhhhK(ubh)}(hhh](h)}(hCross Compilingh]hCross Compiling}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1hhj hhhhhKPubh)}(hX# A single Clang compiler binary (and corresponding LLVM utilities) will
typically contain all supported back ends, which can help simplify cross
compiling especially when ``LLVM=1`` is used. If you use only LLVM tools,
``CROSS_COMPILE`` or target-triple-prefixes become unnecessary. Example::h](hA single Clang compiler binary (and corresponding LLVM utilities) will
typically contain all supported back ends, which can help simplify cross
compiling especially when }(hj hhhNhNubj& )}(h
``LLVM=1``h]hLLVM=1}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hj ubh& is used. If you use only LLVM tools,
}(hj hhhNhNubj& )}(h``CROSS_COMPILE``h]h
CROSS_COMPILE}(hj1 hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hj ubh7 or target-triple-prefixes become unnecessary. Example:}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1hhhhKRhj hhubj@ )}(hmake LLVM=1 ARCH=arm64h]hmake LLVM=1 ARCH=arm64}hjI sbah }(h ]h ]h"]h$]h&]jO jP uh1j? hhhKWhj hhubh)}(hAs an example of mixing LLVM and GNU utilities, for a target like ``ARCH=s390``
which does not yet have ``ld.lld`` or ``llvm-objcopy`` support, you could
invoke ``make`` via::h](hBAs an example of mixing LLVM and GNU utilities, for a target like }(hjW hhhNhNubj& )}(h
``ARCH=s390``h]h ARCH=s390}(hj_ hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hjW ubh
which does not yet have }(hjW hhhNhNubj& )}(h
``ld.lld``h]hld.lld}(hjq hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hjW ubh or }(hjW hhhNhNubj& )}(h``llvm-objcopy``h]h llvm-objcopy}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hjW ubh support, you could
invoke }(hjW hhhNhNubj& )}(h``make``h]hmake}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hjW ubh via:}(hjW hhhNhNubeh }(h ]h ]h"]h$]h&]uh1hhhhKYhj hhubj@ )}(hSmake LLVM=1 ARCH=s390 LD=s390x-linux-gnu-ld.bfd \
OBJCOPY=s390x-linux-gnu-objcopyh]hSmake LLVM=1 ARCH=s390 LD=s390x-linux-gnu-ld.bfd \
OBJCOPY=s390x-linux-gnu-objcopy}hj sbah }(h ]h ]h"]h$]h&]jO jP uh1j? hhhK]hj hhubh)}(hThis example will invoke ``s390x-linux-gnu-ld.bfd`` as the linker and
``s390x-linux-gnu-objcopy``, so ensure those are reachable in your ``$PATH``.h](hThis example will invoke }(hj hhhNhNubj& )}(h``s390x-linux-gnu-ld.bfd``h]hs390x-linux-gnu-ld.bfd}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hj ubh as the linker and
}(hj hhhNhNubj& )}(h``s390x-linux-gnu-objcopy``h]hs390x-linux-gnu-objcopy}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hj ubh(, so ensure those are reachable in your }(hj hhhNhNubj& )}(h ``$PATH``h]h$PATH}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hj ubh.}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1hhhhK`hj hhubh)}(h``CROSS_COMPILE`` is not used to prefix the Clang compiler binary (or
corresponding LLVM utilities) as is the case for GNU utilities when ``LLVM=1``
is not set.h](j& )}(h``CROSS_COMPILE``h]h
CROSS_COMPILE}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hj ubhy is not used to prefix the Clang compiler binary (or
corresponding LLVM utilities) as is the case for GNU utilities when }(hj hhhNhNubj& )}(h
``LLVM=1``h]hLLVM=1}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hj ubh
is not set.}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1hhhhKchj hhubeh }(h ]cross-compilingah ]h"]cross compilingah$]h&]uh1hhhhhhhhKPubh)}(hhh](h)}(hThe LLVM_IAS= argumenth]hThe LLVM_IAS= argument}(hj8 hhhNhNubah }(h ]h ]h"]h$]h&]uh1hhj5 hhhhhKhubh)}(hClang can assemble assembler code. You can pass ``LLVM_IAS=0`` to disable this
behavior and have Clang invoke the corresponding non-integrated assembler
instead. Example::h](h0Clang can assemble assembler code. You can pass }(hjF hhhNhNubj& )}(h``LLVM_IAS=0``h]h
LLVM_IAS=0}(hjN hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hjF ubhl to disable this
behavior and have Clang invoke the corresponding non-integrated assembler
instead. Example:}(hjF hhhNhNubeh }(h ]h ]h"]h$]h&]uh1hhhhKjhj5 hhubj@ )}(hmake LLVM=1 LLVM_IAS=0h]hmake LLVM=1 LLVM_IAS=0}hjf sbah }(h ]h ]h"]h$]h&]jO jP uh1j? hhhKnhj5 hhubh)}(hX ``CROSS_COMPILE`` is necessary when cross compiling and ``LLVM_IAS=0``
is used in order to set ``--prefix=`` for the compiler to find the
corresponding non-integrated assembler (typically, you don't want to use the
system assembler when targeting another architecture). Example::h](j& )}(h``CROSS_COMPILE``h]h
CROSS_COMPILE}(hjx hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hjt ubh' is necessary when cross compiling and }(hjt hhhNhNubj& )}(h``LLVM_IAS=0``h]h
LLVM_IAS=0}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hjt ubh
is used in order to set }(hjt hhhNhNubj& )}(h
``--prefix=``h]h --prefix=}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hjt ubh for the compiler to find the
corresponding non-integrated assembler (typically, you don’t want to use the
system assembler when targeting another architecture). Example:}(hjt hhhNhNubeh }(h ]h ]h"]h$]h&]uh1hhhhKphj5 hhubj@ )}(h@make LLVM=1 ARCH=arm LLVM_IAS=0 CROSS_COMPILE=arm-linux-gnueabi-h]h@make LLVM=1 ARCH=arm LLVM_IAS=0 CROSS_COMPILE=arm-linux-gnueabi-}hj sbah }(h ]h ]h"]h$]h&]jO jP uh1j? hhhKuhj5 hhubeh }(h ]the-llvm-ias-argumentah ]h"]the llvm_ias= argumentah$]h&]uh1hhhhhhhhKhubh)}(hhh](h)}(hCcacheh]hCcache}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1hhj hhhhhKyubh)}(h``ccache`` can be used with ``clang`` to improve subsequent builds, (though
KBUILD_BUILD_TIMESTAMP_ should be set to a deterministic value between builds
in order to avoid 100% cache misses, see Reproducible_builds_ for more info)::h](j& )}(h
``ccache``h]hccache}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hj ubh can be used with }(hj hhhNhNubj& )}(h ``clang``h]hclang}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hj ubh' to improve subsequent builds, (though
}(hj hhhNhNubj )}(hKBUILD_BUILD_TIMESTAMP_h]hKBUILD_BUILD_TIMESTAMP}(hj hhhNhNubah }(h ]h ]h"]h$]h&]nameKBUILD_BUILD_TIMESTAMPj "kbuild.html#kbuild-build-timestampuh1j hj resolvedKubh` should be set to a deterministic value between builds
in order to avoid 100% cache misses, see }(hj hhhNhNubj )}(hReproducible_builds_h]hReproducible_builds}(hj hhhNhNubah }(h ]h ]h"]h$]h&]nameReproducible_buildsj #reproducible-builds.html#timestampsuh1j hj j Kubh for more info):}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1hhhhK{hj hhubj@ )}(h7KBUILD_BUILD_TIMESTAMP='' make LLVM=1 CC="ccache clang"h]h7KBUILD_BUILD_TIMESTAMP='' make LLVM=1 CC="ccache clang"}hj4 sbah }(h ]h ]h"]h$]h&]jO jP uh1j? hhhKhj hhubh)}(h>.. _KBUILD_BUILD_TIMESTAMP: kbuild.html#kbuild-build-timestamph]h }(h ]kbuild-build-timestampah ]h"]kbuild_build_timestampah$]h&]j j uh1hhKhj hhhhj# Kubh)}(h<.. _Reproducible_builds: reproducible-builds.html#timestampsh]h }(h ]reproducible-buildsah ]h"]reproducible_buildsah$]h&]j j) uh1hhKhj hhhhj# Kubeh }(h ]ccacheah ]h"]ccacheah$]h&]uh1hhhhhhhhKyubh)}(hhh](h)}(hSupported Architecturesh]hSupported Architectures}(hje hhhNhNubah }(h ]h ]h"]h$]h&]uh1hhjb hhhhhKubh)}(hX LLVM does not target all of the architectures that Linux supports and
just because a target is supported in LLVM does not mean that the kernel
will build or work without any issues. Below is a general summary of
architectures that currently work with ``CC=clang`` or ``LLVM=1``. Level
of support corresponds to "S" values in the MAINTAINERS files. If an
architecture is not present, it either means that LLVM does not target
it or there are known issues. Using the latest stable version of LLVM or
even the development tree will generally yield the best results.
An architecture's ``defconfig`` is generally expected to work well,
certain configurations may have problems that have not been uncovered
yet. Bug reports are always welcome at the issue tracker below!h](hLLVM does not target all of the architectures that Linux supports and
just because a target is supported in LLVM does not mean that the kernel
will build or work without any issues. Below is a general summary of
architectures that currently work with }(hjs hhhNhNubj& )}(h ``CC=clang``h]hCC=clang}(hj{ hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hjs ubh or }(hjs hhhNhNubj& )}(h
``LLVM=1``h]hLLVM=1}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hjs ubhX6 . Level
of support corresponds to “S” values in the MAINTAINERS files. If an
architecture is not present, it either means that LLVM does not target
it or there are known issues. Using the latest stable version of LLVM or
even the development tree will generally yield the best results.
An architecture’s }(hjs hhhNhNubj& )}(h
``defconfig``h]h defconfig}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j% hjs ubh is generally expected to work well,
certain configurations may have problems that have not been uncovered
yet. Bug reports are always welcome at the issue tracker below!}(hjs hhhNhNubeh }(h ]h ]h"]h$]h&]uh1hhhhKhjb hhubhtable)}(hhh]htgroup)}(hhh](hcolspec)}(hhh]h }(h ]h ]h"]h$]h&]colwidthK
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