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Introduce ALIGNOF macro

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* gcc_compat.h (ALIGNOF): New macro.
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Дмитрий Левин 2016-11-10 10:29:46 +00:00 committed by Eugene Syromyatnikov
parent fdd97aac53
commit 98b944bb66
1 changed files with 6 additions and 0 deletions
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6
gcc_compat.h
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@ -80,6 +80,12 @@
# define ATTRIBUTE_SENTINEL /* empty */ # define ATTRIBUTE_SENTINEL /* empty */
#endif #endif
#if GNUC_PREREQ(4, 1)
# define ALIGNOF(t_) __alignof__(t_)
#else
# define ALIGNOF(t_) (sizeof(struct {char x_; t_ y_;}) - sizeof(t_))
#endif
#if GNUC_PREREQ(4, 3) #if GNUC_PREREQ(4, 3)
# define ATTRIBUTE_ALLOC_SIZE(args) __attribute__((__alloc_size__ args)) # define ATTRIBUTE_ALLOC_SIZE(args) __attribute__((__alloc_size__ args))
#else #else