cdefs.h (2137B) - Raw
1 #ifndef _SYS_CDEFS_H 2 3 /* This is outside of _ISOMAC to enforce that _Static_assert always 4 uses the two-argument form. This can be removed once the minimum 5 GCC version used to compile glibc is GCC 9.1. */ 6 #ifndef __cplusplus 7 # define _Static_assert(expr, diagnostic) _Static_assert (expr, diagnostic) 8 #endif 9 10 #include <misc/sys/cdefs.h> 11 12 #ifndef _ISOMAC 13 /* The compiler will optimize based on the knowledge the parameter is 14 not NULL. This will omit tests. A robust implementation cannot allow 15 this so when compiling glibc itself we ignore this attribute. */ 16 # undef __nonnull 17 # define __nonnull(params) 18 19 extern void __chk_fail (void) __attribute__ ((__noreturn__)); 20 libc_hidden_proto (__chk_fail) 21 rtld_hidden_proto (__chk_fail) 22 23 /* If we are using redirects internally to support long double, 24 we need to tweak some macros to ensure the PLT bypass tricks 25 continue to work in libc. */ 26 #if __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 1 && IS_IN (libc) && defined SHARED 27 28 # undef __LDBL_REDIR_DECL 29 # define __LDBL_REDIR_DECL(func) \ 30 extern __typeof(func) func __asm (__ASMNAME ("__GI____ieee128_" #func)); 31 32 # undef libc_hidden_ldbl_proto 33 # define libc_hidden_ldbl_proto(func, attrs...) \ 34 extern __typeof(func) ___ieee128_ ## func; \ 35 libc_hidden_proto (___ieee128_ ## func, ##attrs); 36 37 # undef __LDBL_REDIR2_DECL 38 # define __LDBL_REDIR2_DECL(func) \ 39 extern __typeof(__ ## func) __ ## func __asm (__ASMNAME ("__GI____ieee128___" #func)); 40 41 #endif 42 43 #if defined SHARED 44 #if IS_IN (libc) && __USE_FORTIFY_LEVEL > 0 && defined __fortify_function 45 46 #undef __REDIRECT_FORTIFY 47 #define __REDIRECT_FORTIFY(name, proto, alias) \ 48 __REDIRECT(name, proto, __GI_##alias) 49 50 #undef __REDIRECT_FORTIFY_NTH 51 #define __REDIRECT_FORTIFY_NTH(name, proto, alias) \ 52 __REDIRECT_NTH(name, proto, __GI_##alias) 53 54 #endif 55 #endif /* defined SHARED */ 56 57 #endif /* !defined _ISOMAC */ 58 59 /* Prevents a function from being considered for inlining and cloning. */ 60 #ifdef __clang__ 61 # define __attribute_optimization_barrier__ __attribute__ ((optnone)) 62 #else 63 # define __attribute_optimization_barrier__ __attribute__ ((noinline, noclone)) 64 #endif 65 66 #endif