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[Patch] Add __need_offsetof to ginclude/stddef.h
- From: Danny Smith <danny_r_smith_2001 at yahoo dot co dot nz>
- To: libstdc++ at gcc dot gnu dot org, gcc-patches at gcc dot gnu dot org
- Date: Wed, 25 Sep 2002 08:50:03 +1000 (EST)
- Subject: [Patch] Add __need_offsetof to ginclude/stddef.h
With the cheaders=c model, libstdc++-v3/include/c/std_cstddef.h
defines __need_offsetof to get the macro offsetof.
ginclude/stddef.h, however, doesn't know about __need_offsetof.
This fixes the ginclude header:
2002-09-24 Danny Smith <dannysmith@users.sourceforge.net>
* ginclude/stddef.h: Use __need_offsetof to get definition
of offsetof.
Index: stddef.h
===================================================================
RCS file: /cvs/gcc/gcc/gcc/ginclude/stddef.h,v
retrieving revision 1.15
diff -c -3 -p -r1.15 stddef.h
*** stddef.h 2 Aug 2002 06:09:14 -0000 1.15
--- stddef.h 24 Sep 2002 22:23:49 -0000
*************** typedef __WINT_TYPE__ wint_t;
*** 380,390 ****
#endif /* NULL not defined and <stddef.h> or need NULL. */
#undef __need_NULL
! #ifdef _STDDEF_H
/* Offset of member MEMBER in a struct of type TYPE. */
#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
#endif /* _STDDEF_H was defined this time */
--- 380,392 ----
#endif /* NULL not defined and <stddef.h> or need NULL. */
#undef __need_NULL
! #if defined (_STDDEF_H) || defined (__need_offsetof)
/* Offset of member MEMBER in a struct of type TYPE. */
+ #undef offsetof
#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
+ #undef __need_offsetof
#endif /* _STDDEF_H was defined this time */
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