intrin-impl.h: Guard __readfsdword implementation by __has_builtin.
diff --git a/mingw-w64-headers/include/psdk_inc/intrin-impl.h b/mingw-w64-headers/include/psdk_inc/intrin-impl.h
index b99334b..97804fb 100644
--- a/mingw-w64-headers/include/psdk_inc/intrin-impl.h
+++ b/mingw-w64-headers/include/psdk_inc/intrin-impl.h
@@ -1448,9 +1448,11 @@
#if __INTRINSIC_PROLOG(__readfsdword)
unsigned __LONG32 __readfsdword(unsigned __LONG32 Offset);
+#if !__has_builtin(__readfsdword)
__INTRINSICS_USEINLINE
__buildreadseg(__readfsdword, unsigned __LONG32, "fs", "l")
#define __INTRINSIC_DEFINED___readfsdword
+#endif
#endif /* __INTRINSIC_PROLOG */
#if __INTRINSIC_PROLOG(__writefsbyte)
