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c91d4e47e1
This flag was originally added to allow clang to find the GNU cross tools in commit785f11aa59("kbuild: Add better clang cross build support"). This flag was not enough to find the tools at times so '--prefix' was added to the list in commitef8c4ed9db("kbuild: allow to use GCC toolchain not in Clang search path") and improved upon in commitca9b31f6bb("Makefile: Fix GCC_TOOLCHAIN_DIR prefix for Clang cross compilation"). Now that '--prefix' specifies a full path and prefix, '--gcc-toolchain' serves no purpose because the kernel builds with '-nostdinc' and '-nostdlib'. This has been verified with self compiled LLVM 10.0.1 and LLVM 13.0.0 as well as a distribution version of LLVM 11.1.0 without binutils in the LLVM toolchain locations. Link: https://reviews.llvm.org/D97902 Signed-off-by: Nathan Chancellor <nathan@kernel.org> Reviewed-by: Fangrui Song <maskray@google.com> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Tested-by: Nick Desaulniers <ndesaulniers@google.com> Tested-by: Sedat Dilek <sedat.dilek@gmail.com> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
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 Restructured Text 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.