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7a4ffec9fd
Initialize the pointer 'o' in options__order to NULL to prevent a
compiler warning/error which is observed when compiling with the '-Og'
option, but is not emitted by the compiler with the current default
compilation options.
For example, when compiling libsubcmd with
$ make "EXTRA_CFLAGS=-Og" -C tools/lib/subcmd/ clean all
Clang version 17.0.6 and GCC 13.3.1 fail to compile parse-options.c due
to following error:
parse-options.c: In function ‘options__order’:
parse-options.c:832:9: error: ‘o’ may be used uninitialized [-Werror=maybe-uninitialized]
832 | memcpy(&ordered[nr_opts], o, sizeof(*o));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
parse-options.c:810:30: note: ‘o’ was declared here
810 | const struct option *o, *p = opts;
| ^
cc1: all warnings being treated as errors
Signed-off-by: Eder Zulian <ezulian@redhat.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/bpf/20241022172329.3871958-4-ezulian@redhat.com
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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.