96ba5999e8
Some shell tests depend on finding symbols for perf itself, and fail if perf has been stripped and no debug object is available. Add helper functions to check if perf has a needed symbol. This is preparation for amending the tests themselves to be skipped if a needed symbol is not found. The functions make use of the "Symbols" test which reads and checks symbols from a dso, perf itself by default. Note the "Symbols" test will find symbols using the same method as other perf tests, including, for example, looking in the buildid cache. An alternative would be to prevent the needed symbols from being stripped, which seems to work with gcc's externally_visible attribute, but that attribute is not supported by clang. Another alternative would be to use option -Wl,-E (which is already used when perf is built with perl support) which causes the linker to add all (global) symbols to the dynamic symbol table. Then the required symbols need only be made global in scope to avoid being strippable. However that goes beyond what is needed. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Acked-by: Ian Rogers <irogers@google.com> Cc: German Gomez <german.gomez@arm.com> Cc: James Clark <james.clark@arm.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Leo Yan <leo.yan@linaro.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/r/20231123075848.9652-3-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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.
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.