@@ -63,6 +63,23 @@ They can be enabled individually. The full list of the parameters: ::
Currently, the integrated assembler is disabled by default. You can pass
``LLVM_IAS=1`` to enable it.
+Omitting CROSS_COMPILE
+----------------------
+
+As explained above, ``CROSS_COMPILE`` is used to set ``--target=<triple>``.
+
+Unless ``LLVM_IAS=1`` is specified, ``CROSS_COMPILE`` is also used to derive
+``--prefix=<path>`` to search for the GNU assembler.
+
+If ``CROSS_COMPILE`` is not specified, the ``--target=<triple>`` is inferred
+from ``ARCH``.
+
+That means if you use only LLVM tools, ``CROSS_COMPILE`` becomes unnecessary.
+
+For example, to cross-compile the arm64 kernel::
+
+ ARCH=arm64 make LLVM=1 LLVM_IAS=1
+
Supported Architectures
-----------------------
As noted by Masahiro, document how we can generally infer CROSS_COMPILE (and the more specific details about --target and --prefix) based on ARCH. Suggested-by: Masahiro Yamada <masahiroy@kernel.org> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> --- Note: Masahiro, I'm sorry for putting my name on this as you mostly wrote it. I touched it up slightly. I don't know how best to attribute it to you. If you'd prefer to take back authorship, please do; I'd rather not add your SOB without seeing it stated explicitly. Documentation/kbuild/llvm.rst | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)