tools/include/linux/compiler-gcc.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _TOOLS_LINUX_COMPILER_H_
   3 #error "Please don't include <linux/compiler-gcc.h> directly, include <linux/compiler.h> instead."
   4 #endif
   5
   6 /*
   7  * Common definitions for all gcc versions go here.
   8  */
   9 #define GCC_VERSION (__GNUC__ * 10000           \
  10                      + __GNUC_MINOR__ * 100     \
  11                      + __GNUC_PATCHLEVEL__)
  12
  13 #if GCC_VERSION >= 70000 && !defined(__CHECKER__)
  14 # define __fallthrough __attribute__ ((fallthrough))
  15 #endif
  16
  17 #if GCC_VERSION >= 40300
  18 # define __compiletime_error(message) __attribute__((error(message)))
  19 #endif /* GCC_VERSION >= 40300 */
  20
  21 /* &a[0] degrades to a pointer: a different type from an array */
  22 #define __must_be_array(a)      BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
  23
  24 #define  noinline       __attribute__((noinline))
  25 #ifndef __packed
  26 #define __packed        __attribute__((packed))
  27 #endif
  28 #ifndef __noreturn
  29 #define __noreturn      __attribute__((noreturn))
  30 #endif
  31 #ifndef __aligned
  32 #define __aligned(x)    __attribute__((aligned(x)))
  33 #endif
  34 #define __printf(a, b)  __attribute__((format(printf, a, b)))
  35 #define __scanf(a, b)   __attribute__((format(scanf, a, b)))