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@@ -97,7 +97,7 @@ extern int dmalloc_free(const char *file, const int line, void *pnt,
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#define tor_memdup(s, n) _tor_memdup(s, n DMALLOC_ARGS)
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/** Return the offset of <b>member</b> within the type <b>tp</b>, in bytes */
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-#ifdef __GNUC__
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+#if defined(__GNUC__) && __GNUC__ > 3
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#define STRUCT_OFFSET(tp, member) __builtin_offsetof(tp, member)
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#else
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#define STRUCT_OFFSET(tp, member) \
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