diff -Pdpru gnu-cobol-1.1/libcob/common.h gnu-cobol-1.1-mod/libcob/common.h
--- gnu-cobol-1.1/libcob/common.h	2013-12-23 22:21:31.000000000 +0900
+++ gnu-cobol-1.1-mod/libcob/common.h	2014-04-30 21:28:19.563475933 +0900
@@ -258,7 +258,7 @@
 	#define COB_EXPIMP 	__declspec(dllimport) extern
 #endif
 #else
-	#define COB_EXPIMP 	extern
+	#define COB_EXPIMP 	/*extern*/
 #endif
 
 #if	defined(__370__) || defined(_MSC_VER)