offsetof already defined in stddef.h in gcc4, so add check to prevent redefinition.

(Logical change 1.658)
2005-01-17 11:46:32 +00:00 · 2005-01-17 11:46:32 +00:00 · a82280f235
parent 84fccf8a8b
commit a82280f235
1 changed files with 2 additions and 0 deletions
--- a/include/ntfs/support.h
+++ b/include/ntfs/support.h
@ -49,7 +49,9 @@
 /*
 * Useful macro for determining the offset of a struct member.
 */
+#ifndef offsetof
 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
+#endif

 /*
 * Simple bit operation macros. NOTE: These are NOT atomic.