1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef _TOOLS_LINUX_COMPILER_H_ 3*4882a593Smuzhiyun #error "Please don't include <linux/compiler-gcc.h> directly, include <linux/compiler.h> instead." 4*4882a593Smuzhiyun #endif 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun /* 7*4882a593Smuzhiyun * Common definitions for all gcc versions go here. 8*4882a593Smuzhiyun */ 9*4882a593Smuzhiyun #ifndef GCC_VERSION 10*4882a593Smuzhiyun #define GCC_VERSION (__GNUC__ * 10000 \ 11*4882a593Smuzhiyun + __GNUC_MINOR__ * 100 \ 12*4882a593Smuzhiyun + __GNUC_PATCHLEVEL__) 13*4882a593Smuzhiyun #endif 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun #if GCC_VERSION >= 70000 && !defined(__CHECKER__) 16*4882a593Smuzhiyun # define __fallthrough __attribute__ ((fallthrough)) 17*4882a593Smuzhiyun #endif 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun #if GCC_VERSION >= 40300 20*4882a593Smuzhiyun # define __compiletime_error(message) __attribute__((error(message))) 21*4882a593Smuzhiyun #endif /* GCC_VERSION >= 40300 */ 22*4882a593Smuzhiyun 23*4882a593Smuzhiyun /* &a[0] degrades to a pointer: a different type from an array */ 24*4882a593Smuzhiyun #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun #ifndef __pure 27*4882a593Smuzhiyun #define __pure __attribute__((pure)) 28*4882a593Smuzhiyun #endif 29*4882a593Smuzhiyun #define noinline __attribute__((noinline)) 30*4882a593Smuzhiyun #ifndef __packed 31*4882a593Smuzhiyun #define __packed __attribute__((packed)) 32*4882a593Smuzhiyun #endif 33*4882a593Smuzhiyun #ifndef __noreturn 34*4882a593Smuzhiyun #define __noreturn __attribute__((noreturn)) 35*4882a593Smuzhiyun #endif 36*4882a593Smuzhiyun #ifndef __aligned 37*4882a593Smuzhiyun #define __aligned(x) __attribute__((aligned(x))) 38*4882a593Smuzhiyun #endif 39*4882a593Smuzhiyun #define __printf(a, b) __attribute__((format(printf, a, b))) 40*4882a593Smuzhiyun #define __scanf(a, b) __attribute__((format(scanf, a, b))) 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun #if GCC_VERSION >= 50100 43*4882a593Smuzhiyun #define COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW 1 44*4882a593Smuzhiyun #endif 45