need firm_config.h include because of __attribute__ usage

[r13781]

diff --git a/ir/adt/util.h b/ir/adt/util.h
index a5d1fe1..6730c44 100644 (file)
--- a/ir/adt/util.h
+++ b/ir/adt/util.h
@@ -26,6 +26,8 @@
 #ifndef FIRM_ADT_UTIL_H
 #define FIRM_ADT_UTIL_H
 
+#include "firm_config.h"
+
 /**
  * Get the offset of a member of a struct.
  * @param type   The type of the struct member is in.