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Masahiro Yamada 541b57e313 selinux: do not include <linux/*.h> headers from host programs
The header, security/selinux/include/classmap.h, is included not only
from kernel space but also from host programs.

It includes <linux/capability.h> and <linux/socket.h>, which pull in
more <linux/*.h> headers. This makes the host programs less portable,
specifically causing build errors on macOS.

Those headers are included for the following purposes:

 - <linux/capability.h> for checking CAP_LAST_CAP
 - <linux/socket.h> for checking PF_MAX

These checks can be guarded by __KERNEL__ so they are skipped when
building host programs. Testing them when building the kernel should
be sufficient.

The header, security/selinux/include/initial_sid_to_string.h, includes
<linux/stddef.h> for the NULL definition, but this is not portable
either. Instead, <stddef.h> should be included for host programs.

Reported-by: Daniel Gomez <da.gomez@samsung.com>
Closes: https://lore.kernel.org/lkml/20240807-macos-build-support-v1-6-4cd1ded85694@samsung.com/
Closes: https://lore.kernel.org/lkml/20240807-macos-build-support-v1-7-4cd1ded85694@samsung.com/
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Paul Moore <paul@paul-moore.com>
History 2024-10-03 15:34:24 -04:00
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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.