Warning: This file is not a C or C++ file. It does not have highlighting.
| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
|---|---|
| 2 | #ifndef _TOOLS_CONFIG_H |
| 3 | #define _TOOLS_CONFIG_H |
| 4 | |
| 5 | /* Subset of include/linux/kconfig.h */ |
| 6 | |
| 7 | #define __ARG_PLACEHOLDER_1 0, |
| 8 | #define __take_second_arg(__ignored, val, ...) val |
| 9 | |
| 10 | /* |
| 11 | * Helper macros to use CONFIG_ options in C/CPP expressions. Note that |
| 12 | * these only work with boolean and tristate options. |
| 13 | */ |
| 14 | |
| 15 | /* |
| 16 | * Getting something that works in C and CPP for an arg that may or may |
| 17 | * not be defined is tricky. Here, if we have "#define CONFIG_BOOGER 1" |
| 18 | * we match on the placeholder define, insert the "0," for arg1 and generate |
| 19 | * the triplet (0, 1, 0). Then the last step cherry picks the 2nd arg (a one). |
| 20 | * When CONFIG_BOOGER is not defined, we generate a (... 1, 0) pair, and when |
| 21 | * the last step cherry picks the 2nd arg, we get a zero. |
| 22 | */ |
| 23 | #define __is_defined(x) ___is_defined(x) |
| 24 | #define ___is_defined(val) ____is_defined(__ARG_PLACEHOLDER_##val) |
| 25 | #define ____is_defined(arg1_or_junk) __take_second_arg(arg1_or_junk 1, 0) |
| 26 | |
| 27 | /* |
| 28 | * IS_BUILTIN(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y', 0 |
| 29 | * otherwise. For boolean options, this is equivalent to |
| 30 | * IS_ENABLED(CONFIG_FOO). |
| 31 | */ |
| 32 | #define IS_BUILTIN(option) __is_defined(option) |
| 33 | |
| 34 | #endif /* _TOOLS_CONFIG_H */ |
| 35 |
Warning: This file is not a C or C++ file. It does not have highlighting.