1 files changed, 2 insertions, 0 deletions
diff --git a/const.h b/const.h
index fab99d9..9e242c0 100644
--- a/const.h
+++ b/const.h
@@ -24,3 +24,5 @@
 #define MAX_ERROR_BUFF  1024
 #define INT_SIZE        4
 #define CHAR_SIZE       1
+#define EXT_LINKAGE     1
+#define NO_LINKAGE     0