Index: libcfa/src/fstream.cfa
===================================================================
--- libcfa/src/fstream.cfa	(revision 8108ba8a8f4d28b94bec400ffa195c7e3ecb16b5)
+++ libcfa/src/fstream.cfa	(revision cce46486af6b1ec94d321bec0f28a927d57903cd)
@@ -22,4 +22,6 @@
 #include <assert.h>
 #include <errno.h>										// errno
+
+#pragma GCC visibility push(default)
 
 // *********************************** ofstream ***********************************
@@ -118,5 +120,5 @@
 		// abort | IO_MSG "open output file \"" | name | "\"" | nl | strerror( errno );
 	} // if
-	(os){ file };										// initialize 
+	(os){ file };										// initialize
 } // open
 
@@ -157,5 +159,5 @@
 	va_list args;
 	va_start( args, format );
-		
+
 	int len;
     for ( cnt; 10 ) {
@@ -241,5 +243,5 @@
 		// abort | IO_MSG "open input file \"" | name | "\"" | nl | strerror( errno );
 	} // if
-	(is){ file };										// initialize 
+	(is){ file };										// initialize
 } // open
 
Index: libcfa/src/iostream.cfa
===================================================================
--- libcfa/src/iostream.cfa	(revision 8108ba8a8f4d28b94bec400ffa195c7e3ecb16b5)
+++ libcfa/src/iostream.cfa	(revision cce46486af6b1ec94d321bec0f28a927d57903cd)
@@ -32,4 +32,5 @@
 #include "bitmanip.hfa"									// high1
 
+#pragma GCC visibility push(default)
 
 // *********************************** ostream ***********************************
Index: libcfa/src/strstream.cfa
===================================================================
--- libcfa/src/strstream.cfa	(revision 8108ba8a8f4d28b94bec400ffa195c7e3ecb16b5)
+++ libcfa/src/strstream.cfa	(revision cce46486af6b1ec94d321bec0f28a927d57903cd)
@@ -1,10 +1,10 @@
-// 
+//
 // Cforall Version 1.0.0 Copyright (C) 2021 University of Waterloo
-// 
+//
 // The contents of this file are covered under the licence agreement in the
 // file "LICENCE" distributed with Cforall.
 //
-// strstream.cfa -- 
-// 
+// strstream.cfa --
+//
 // Author           : Peter A. Buhr
 // Created On       : Thu Apr 22 22:24:35 2021
@@ -12,5 +12,5 @@
 // Last Modified On : Sun Oct 10 16:13:20 2021
 // Update Count     : 101
-// 
+//
 
 #include "strstream.hfa"
@@ -24,4 +24,5 @@
 #include <unistd.h>										// sbrk, sysconf
 
+#pragma GCC visibility push(default)
 
 // *********************************** strstream ***********************************