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Commit 6b416ebc authored by Jiri Olsa's avatar Jiri Olsa Committed by Arnaldo Carvalho de Melo
Browse files

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: default avatarJiri 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 0a6545bd

tools/include/tools/config.h

0 → 100644
+34 −0
Original line number Original line Diff line number Diff line 
/* 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 */