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795793b3a4
Some newer versions of gcc (observed with a patched gcc 4.5.1) seem to treat our offsetof() implementation as not being a compile-time constant. Fix by using __builtin_offsetof() when available. (As with the original offsetof() macro, this code is copied from the Linux kernel's stddef.h.) Reported-by: Arkadiusz Miskiewicz <arekm@maven.pl> Signed-off-by: Michael Brown <mcb30@ipxe.org>
31 lines
721 B
C
31 lines
721 B
C
#ifndef STDDEF_H
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#define STDDEF_H
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FILE_LICENCE ( GPL2_ONLY );
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/* for size_t */
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#include <stdint.h>
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#undef NULL
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#define NULL ((void *)0)
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#undef offsetof
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#ifdef __compiler_offsetof
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#define offsetof(TYPE,MEMBER) __compiler_offsetof(TYPE,MEMBER)
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#else
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#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
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#endif
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#undef container_of
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#define container_of(ptr, type, member) ({ \
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const typeof( ((type *)0)->member ) *__mptr = (ptr); \
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(type *)( (char *)__mptr - offsetof(type,member) );})
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/* __WCHAR_TYPE__ is defined by gcc and will change if -fshort-wchar is used */
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#ifndef __WCHAR_TYPE__
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#define __WCHAR_TYPE__ long int
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#endif
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typedef __WCHAR_TYPE__ wchar_t;
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#endif /* STDDEF_H */
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