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glibc  2.9
cdefs.h
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00001 #ifndef _SYS_CDEFS_H
00002 
00003 #include <misc/sys/cdefs.h>
00004 
00005 /* The compiler will optimize based on the knowledge the parameter is
00006    not NULL.  This will omit tests.  A robust implementation cannot allow
00007    this so when compiling glibc itself we ignore this attribute.  */
00008 #undef __nonnull
00009 #define __nonnull(params)
00010 
00011 extern void __chk_fail (void) __attribute__ ((__noreturn__));
00012 libc_hidden_proto (__chk_fail)
00013 rtld_hidden_proto (__chk_fail)
00014 
00015 #endif