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Syntax: $(info,<text>) $(warning-if,<condition>,<text>) $(error-if,<condition>,<text) The 'info' function prints a message to stdout as in Make. The 'warning-if' and 'error-if' are similar to 'warning' and 'error' in Make, but take the condition parameter. They are effective only when the <condition> part is y. Kconfig does not implement the lazy expansion as used in the 'if' 'and, 'or' functions in Make. In other words, Kconfig does not support conditional expansion. The unconditional 'error' function would always terminate the parsing, hence would be useless in Kconfig. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Kees Cook <keescook@chromium.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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.