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32b504854b
When building objtool against a sysroot that contains a stripped down
version of the UAPI headers, the following error happens:
In file included from arch/x86/decode.c:10:
In file included from .../tools/arch/x86/include/asm/insn.h:10:
In file included from <sysroot>/include/asm/byteorder.h:9:
In file included from <sysroot>/include/linux/byteorder/little_endian.h:15:
In file included from <sysroot>/include/linux/stddef.h:9:
In file included from .../tools/include/linux/compiler_types.h:36:
.../tools/include/linux/compiler-gcc.h:3:2: error: "Please don't include <linux/compiler-gcc.h> directly, include <linux/compiler.h> instead."
3 | #error "Please don't include <linux/compiler-gcc.h> directly, include <linux/compiler.h> instead."
| ^
1 error generated.
As hinted by the error, this is because <sysroot>/include/linux/stddef.h
(a stripped-down version of uapi/include/linux/stddef.h) includes
linux/compiler_types.h directly. However, this gets resolved to
tools/include/linux/compiler_types.h, which is not expected to be
included directly.
To resolve this, I added tools/include/uapi to the include paths when
building objtool. With this trick, linux/stddef.h is resolved to
tools/include/uapi/linux/stddef.h, which doesn't include
linux/compiler_types.h.
Signed-off-by: HONG Yifan <elsk@google.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
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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.