1*858ea5e5SAndroid Build Coastguard Worker /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */ 2*858ea5e5SAndroid Build Coastguard Worker 3*858ea5e5SAndroid Build Coastguard Worker #ifndef _LINUX_COMPILER_H_ 4*858ea5e5SAndroid Build Coastguard Worker #error "Please don't include <linux/compiler-gcc.h> directly, include <linux/compiler.h> instead." 5*858ea5e5SAndroid Build Coastguard Worker #endif 6*858ea5e5SAndroid Build Coastguard Worker 7*858ea5e5SAndroid Build Coastguard Worker /* 8*858ea5e5SAndroid Build Coastguard Worker * Common definitions for all gcc versions go here. 9*858ea5e5SAndroid Build Coastguard Worker */ 10*858ea5e5SAndroid Build Coastguard Worker #ifndef GCC_VERSION 11*858ea5e5SAndroid Build Coastguard Worker #define GCC_VERSION (__GNUC__ * 10000 \ 12*858ea5e5SAndroid Build Coastguard Worker + __GNUC_MINOR__ * 100 \ 13*858ea5e5SAndroid Build Coastguard Worker + __GNUC_PATCHLEVEL__) 14*858ea5e5SAndroid Build Coastguard Worker #endif 15*858ea5e5SAndroid Build Coastguard Worker 16*858ea5e5SAndroid Build Coastguard Worker #if __has_attribute(__fallthrough__) 17*858ea5e5SAndroid Build Coastguard Worker # define fallthrough __attribute__((__fallthrough__)) 18*858ea5e5SAndroid Build Coastguard Worker #else 19*858ea5e5SAndroid Build Coastguard Worker # define fallthrough do {} while (0) /* fallthrough */ 20*858ea5e5SAndroid Build Coastguard Worker #endif 21*858ea5e5SAndroid Build Coastguard Worker 22*858ea5e5SAndroid Build Coastguard Worker #if __has_attribute(__error__) 23*858ea5e5SAndroid Build Coastguard Worker # define __compiletime_error(message) __attribute__((error(message))) 24*858ea5e5SAndroid Build Coastguard Worker #endif 25*858ea5e5SAndroid Build Coastguard Worker 26*858ea5e5SAndroid Build Coastguard Worker /* &a[0] degrades to a pointer: a different type from an array */ 27*858ea5e5SAndroid Build Coastguard Worker #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) 28*858ea5e5SAndroid Build Coastguard Worker #ifndef __noreturn 29*858ea5e5SAndroid Build Coastguard Worker #define __noreturn __attribute__((noreturn)) 30*858ea5e5SAndroid Build Coastguard Worker #endif 31*858ea5e5SAndroid Build Coastguard Worker #define __printf(a, b) __attribute__((format(printf, a, b))) 32