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02e9a22cee
The headercheck tries to call clang with a mix of compiler arguments that don't include the target architecture. When building e.g. x86 headers on arm64, this produces a warning like clang: warning: unknown platform, assuming -mfloat-abi=soft Add in the KBUILD_CPPFLAGS, which contain the target, in order to make it build properly. See also1b71c2fb04("kbuild: userprogs: fix bitsize and target detection on clang"). Reviewed-by: Nathan Chancellor <nathan@kernel.org> Fixes:feb843a469("kbuild: add $(CLANG_FLAGS) to KBUILD_CPPFLAGS") Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.