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f5b07010c1
When using EXTRA_CFLAGS, for example "EXTRA_CFLAGS=-DREFCNT_CHECKING=1", this construct stops setting -g which you'd expect would not be affected by adding extra flags. Additionally, EXTRA_CFLAGS should be the last thing to be appended so that it can be used to undo any defaults. And no condition is required, just += appends to any existing CFLAGS and also appends or doesn't append EXTRA_CFLAGS if they are or aren't set. It's not clear why DEBUG=1 is required for -g in Perf when in libperf it's always on, but I don't think we need to change that behavior now because someone may be depending on it. Signed-off-by: James Clark <james.clark@linaro.org> Reviewed-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20250319114009.417865-1-james.clark@linaro.org Signed-off-by: Namhyung Kim <namhyung@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 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.