1 /* 2 * Copyright (c) 2015 Dmitry V. Levin <ldv (at) altlinux.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef STRACE_GCC_COMPAT_H 29 #define STRACE_GCC_COMPAT_H 30 31 #if defined __GNUC__ && defined __GNUC_MINOR__ 32 # define GNUC_PREREQ(maj, min) \ 33 ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) 34 #else 35 # define __attribute__(x) /* empty */ 36 # define GNUC_PREREQ(maj, min) 0 37 #endif 38 39 #if GNUC_PREREQ(2, 5) 40 # define ATTRIBUTE_NORETURN __attribute__((__noreturn__)) 41 #else 42 # define ATTRIBUTE_NORETURN /* empty */ 43 #endif 44 45 #if GNUC_PREREQ(2, 7) 46 # define ATTRIBUTE_FORMAT(args) __attribute__((__format__ args)) 47 # define ATTRIBUTE_ALIGNED(arg) __attribute__((__aligned__(arg))) 48 # define ATTRIBUTE_PACKED __attribute__((__packed__)) 49 #else 50 # define ATTRIBUTE_FORMAT(args) /* empty */ 51 # define ATTRIBUTE_ALIGNED(arg) /* empty */ 52 # define ATTRIBUTE_PACKED /* empty */ 53 #endif 54 55 #if GNUC_PREREQ(3, 0) 56 # define SAME_TYPE(x, y) __builtin_types_compatible_p(typeof(x), typeof(y)) 57 # define FAIL_BUILD_ON_ZERO(expr) (sizeof(int[-1 + 2 * !!(expr)]) * 0) 58 /* &(a)[0] is a pointer and not an array, shouldn't be treated as the same */ 59 # define MUST_BE_ARRAY(a) FAIL_BUILD_ON_ZERO(!SAME_TYPE((a), &(a)[0])) 60 #else 61 # define SAME_TYPE(x, y) 0 62 # define MUST_BE_ARRAY(a) 0 63 #endif 64 65 #if GNUC_PREREQ(3, 0) 66 # define ATTRIBUTE_MALLOC __attribute__((__malloc__)) 67 #else 68 # define ATTRIBUTE_MALLOC /* empty */ 69 #endif 70 71 #if GNUC_PREREQ(3, 1) 72 # define ATTRIBUTE_NOINLINE __attribute__((__noinline__)) 73 #else 74 # define ATTRIBUTE_NOINLINE /* empty */ 75 #endif 76 77 #if GNUC_PREREQ(4, 0) 78 # define ATTRIBUTE_SENTINEL __attribute__((__sentinel__)) 79 #else 80 # define ATTRIBUTE_SENTINEL /* empty */ 81 #endif 82 83 #if GNUC_PREREQ(4, 1) 84 # define ALIGNOF(t_) __alignof__(t_) 85 #else 86 # define ALIGNOF(t_) (sizeof(struct {char x_; t_ y_;}) - sizeof(t_)) 87 #endif 88 89 #if GNUC_PREREQ(4, 3) 90 # define ATTRIBUTE_ALLOC_SIZE(args) __attribute__((__alloc_size__ args)) 91 #else 92 # define ATTRIBUTE_ALLOC_SIZE(args) /* empty */ 93 #endif 94 95 #endif /* !STRACE_GCC_COMPAT_H */ 96
