Messages in this thread Patch in this message | | | Date | Tue, 3 Apr 2018 22:30:10 -0700 | From | tip-bot for Jiri Olsa <> | Subject | [tip:perf/urgent] tools include: Add config.h header file |
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Commit-ID: 6b416ebcc32c5753214d53c18ac5719c93bc340e Gitweb: https://git.kernel.org/tip/6b416ebcc32c5753214d53c18ac5719c93bc340e Author: Jiri Olsa <jolsa@kernel.org> AuthorDate: Fri, 30 Mar 2018 17:27:11 +0800 Committer: Arnaldo Carvalho de Melo <acme@redhat.com> CommitDate: Mon, 2 Apr 2018 13:31:38 -0300
tools include: Add config.h header file
Adding IS_BUILTIN macro and its dependencies into tools world.
It's taken from kernel's include/linux/kconfig.h, which can't be taken completely due to its kconfig dependencies.
Signed-off-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/1522402036-22915-2-git-send-email-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> --- tools/include/tools/config.h | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+)
diff --git a/tools/include/tools/config.h b/tools/include/tools/config.h new file mode 100644 index 000000000000..08ade7df8132 --- /dev/null +++ b/tools/include/tools/config.h @@ -0,0 +1,34 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _TOOLS_CONFIG_H +#define _TOOLS_CONFIG_H + +/* Subset of include/linux/kconfig.h */ + +#define __ARG_PLACEHOLDER_1 0, +#define __take_second_arg(__ignored, val, ...) val + +/* + * Helper macros to use CONFIG_ options in C/CPP expressions. Note that + * these only work with boolean and tristate options. + */ + +/* + * Getting something that works in C and CPP for an arg that may or may + * not be defined is tricky. Here, if we have "#define CONFIG_BOOGER 1" + * we match on the placeholder define, insert the "0," for arg1 and generate + * the triplet (0, 1, 0). Then the last step cherry picks the 2nd arg (a one). + * When CONFIG_BOOGER is not defined, we generate a (... 1, 0) pair, and when + * the last step cherry picks the 2nd arg, we get a zero. + */ +#define __is_defined(x) ___is_defined(x) +#define ___is_defined(val) ____is_defined(__ARG_PLACEHOLDER_##val) +#define ____is_defined(arg1_or_junk) __take_second_arg(arg1_or_junk 1, 0) + +/* + * IS_BUILTIN(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y', 0 + * otherwise. For boolean options, this is equivalent to + * IS_ENABLED(CONFIG_FOO). + */ +#define IS_BUILTIN(option) __is_defined(option) + +#endif /* _TOOLS_CONFIG_H */
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