| Arnaldo Carvalho de Melo | 1926140 | 2017-02-10 11:41:11 -0300 | [diff] [blame] | 1 | #ifndef _TOOLS_LINUX_COMPILER_H_ |
| 2 | #error "Please don't include <linux/compiler-gcc.h> directly, include <linux/compiler.h> instead." |
| 3 | #endif |
| 4 | |
| 5 | /* |
| 6 | * Common definitions for all gcc versions go here. |
| 7 | */ |
| 8 | #define GCC_VERSION (__GNUC__ * 10000 \ |
| 9 | + __GNUC_MINOR__ * 100 \ |
| 10 | + __GNUC_PATCHLEVEL__) |
| 11 | |
| 12 | #if GCC_VERSION >= 70000 && !defined(__CHECKER__) |
| 13 | # define __fallthrough __attribute__ ((fallthrough)) |
| 14 | #endif |
| Arnaldo Carvalho de Melo | 4900653 | 2017-02-22 16:48:24 -0300 | [diff] [blame] | 15 | |
| 16 | #if GCC_VERSION >= 40300 |
| 17 | # define __compiletime_error(message) __attribute__((error(message))) |
| 18 | #endif /* GCC_VERSION >= 40300 */ |
| Arnaldo Carvalho de Melo | f6441af | 2017-04-17 11:25:00 -0300 | [diff] [blame] | 19 | |
| 20 | /* &a[0] degrades to a pointer: a different type from an array */ |
| 21 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) |