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For most of libraries, in perf.config, they are recorded with -DHAVE_XXX in CFLAGS according to if the libraries are compiled-in. Then C code then will know if the library is compiled-in or not. While for glibc, no -DHAVE_GLIBC_SUPPORT exists. For python and perl libraries, only -DNO_PYTHON and -DNO_LIBPERL exist. To make the code more consistent, the patch creates -DHAVE_LIBPYTHON_SUPPORT and -DHAVE_LIBPERL_SUPPORT if the python and perl libraries are compiled-in. Since the existing flags -DNO_PYTHON and -DNO_LIBPERL are being used in many places in C code, this patch doesn't remove them. In a follow-up patch, we will recontruct the C code and then use HAVE_XXX instead. v3: Move 'CFLAGS += -DHAVE_LIBPYTHON_SUPPORT' and 'CFLAGS += -DHAVE_LIBPERL_SUPPORT' to other places to avoid duplicated feature checking. v2: Create -DHAVE_GLIBC_SUPPORT, -DHAVE_LIBPYTHON_SUPPORT and -DHAVE_LIBPERL_SUPPORT. Signed-off-by: Jin Yao <yao.jin@linux.intel.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@intel.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1522402036-22915-3-git-send-email-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. 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.