Index: libcfa/src/fstream.hfa
===================================================================
--- libcfa/src/fstream.hfa	(revision fca3bf8f3f46f2cf0cf3c5fa29308b3dc1c013dc)
+++ libcfa/src/fstream.hfa	(revision 40cac90c90ddfdd945a6730e54a6ae73d8629bfc)
@@ -10,6 +10,6 @@
 // Created On       : Wed May 27 17:56:53 2015
 // Last Modified By : Peter A. Buhr
-// Last Modified On : Fri Feb  7 19:00:51 2020
-// Update Count     : 174
+// Last Modified On : Mon Feb 17 08:29:23 2020
+// Update Count     : 175
 //
 
@@ -67,5 +67,5 @@
 void close( ofstream & );
 ofstream & write( ofstream &, const char data[], size_t size );
-int fmt( ofstream &, const char format[], ... );
+int fmt( ofstream &, const char format[], ... ) __attribute__(( format(printf, 2, 3) ));
 
 void ?{}( ofstream & os );
@@ -97,5 +97,5 @@
 ifstream & read( ifstream & is, char * data, size_t size );
 ifstream & ungetc( ifstream & is, char c );
-int fmt( ifstream &, const char format[], ... );
+int fmt( ifstream &, const char format[], ... ) __attribute__(( format(scanf, 2, 3) ));
 
 void ?{}( ifstream & is );