From 365b8343d8f882926d817b81243990ff66945d7c Mon Sep 17 00:00:00 2001 From: Olivier Hainque Date: Fri, 28 Jan 2022 16:34:50 +0000 Subject: [PATCH 03/18] undef offsetof before defining it in stddef.h This prevents redefinition warnings by -Wsystem-headers on OSses where system headers happen to provide a definition of their own, such as VxWorks. 2022-02-15 Olivier Hainque gcc/ * ginclude/stddef.h: #undef offsetof before #define. --- gcc/ginclude/stddef.h | 1 + 1 file changed, 1 insertion(+) diff --git a/gcc/ginclude/stddef.h b/gcc/ginclude/stddef.h index 3d29213e8f1..2767edf51de 100644 --- a/gcc/ginclude/stddef.h +++ b/gcc/ginclude/stddef.h @@ -412,6 +412,7 @@ typedef __WINT_TYPE__ wint_t; #ifdef _STDDEF_H /* Offset of member MEMBER in a struct of type TYPE. */ +#undef offsetof /* in case a system header has defined it. */ #define offsetof(TYPE, MEMBER) __builtin_offsetof (TYPE, MEMBER) #if (defined (__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) \ -- 2.25.1