Adapted from https://sourceforge.net/p/docpp/patches/1/

--- doc++-3.4.10/src/comment.ll	2000-06-24 18:50:23.000000000 +0200
+++ doc++-3.4.10/src/comment.ll	2012-09-17 11:14:50.744922841 +0200
@@ -24,7 +24,7 @@
 
 #include <assert.h>
 #include <ctype.h>
-#include <iostream.h>
+#include <iostream>
 #include <stdarg.h>
 #include <stdio.h>
 
--- doc++-3.4.10/src/cpp.ll	2002-05-09 08:11:14.000000000 +0200
+++ doc++-3.4.10/src/cpp.ll	2012-09-17 11:15:21.184333236 +0200
@@ -26,7 +26,7 @@
 
 #include <assert.h>
 #include <ctype.h>
-#include <iostream.h>
+#include <iostream>
 #include <stdarg.h>
 #include <stdio.h>
 
--- doc++-3.4.10/src/datahashtable.h	2000-08-27 21:44:34.000000000 +0200
+++ doc++-3.4.10/src/datahashtable.h	2012-09-17 11:22:59.442589960 +0200
@@ -26,11 +26,13 @@
 #define _DATAHASHTABLE_H
 
 #include <assert.h>
-#include <iostream.h>
+#include <iostream>
 #include <stdlib.h>
 
 #include "McDArray.h"
 
+using namespace std;
+
 /* This should be a private subclass of #DataHashTable#. However, since cfront
    is not able to compile this constrution, we had move the class to global
    scope.
--- doc++-3.4.10/src/doc2dbsgml.ll	2002-05-09 08:11:14.000000000 +0200
+++ doc++-3.4.10/src/doc2dbsgml.ll	2012-09-17 11:20:49.077259414 +0200
@@ -22,8 +22,8 @@
 
 %{
 #include <assert.h>
-#include <fstream.h>
-#include <iostream.h>
+#include <fstream>
+#include <iostream>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -36,6 +36,8 @@
 #undef	YY_INPUT
 #define	YY_INPUT(buf, result, max_size) result = yyread(buf, max_size);
 
+using namespace std;
+
 static Entry*	current;
 static int	inPos;
 static int	lastContext;
--- doc++-3.4.10/src/doc2dbxml.ll	2002-05-09 08:11:14.000000000 +0200
+++ doc++-3.4.10/src/doc2dbxml.ll	2012-09-17 11:20:22.264831159 +0200
@@ -25,8 +25,8 @@
 
 %{
 #include <assert.h>
-#include <fstream.h>
-#include <iostream.h>
+#include <fstream>
+#include <iostream>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -39,6 +39,8 @@
 #undef	YY_INPUT
 #define	YY_INPUT(buf, result, max_size) result = yyread(buf, max_size);
 
+using namespace std;
+
 static Entry*	current;
 static int	inPos;
 static int	lastContext;
--- doc++-3.4.10/src/doc2html.ll	2000-07-17 23:17:24.000000000 +0200
+++ doc++-3.4.10/src/doc2html.ll	2012-09-17 11:22:40.354469631 +0200
@@ -29,6 +29,8 @@
 #include "doc.h"
 #include "nametable.h"
 
+using namespace std;
+
 extern NameTable	gifs;
 
 #define YY_DECL int yylex()
--- doc++-3.4.10/src/doc2tex.ll	2000-11-05 17:21:16.000000000 +0100
+++ doc++-3.4.10/src/doc2tex.ll	2012-09-17 11:23:22.210701715 +0200
@@ -23,8 +23,8 @@
 
 %{
 #include <assert.h>
-#include <fstream.h>
-#include <iostream.h>
+#include <fstream>
+#include <iostream>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -38,6 +38,8 @@
 #undef	YY_INPUT
 #define	YY_INPUT(buf, result, max_size) result = yyread(buf, max_size);
 
+using namespace std;
+
 static Entry*	current;
 static int	inPos;
 static int	lastContext;
--- doc++-3.4.10/src/doc.ll	2000-09-17 21:41:17.000000000 +0200
+++ doc++-3.4.10/src/doc.ll	2012-09-17 11:15:37.068009454 +0200
@@ -23,8 +23,8 @@
 
 %{
 #include <assert.h>
-#include <fstream.h>
-#include <iostream.h>
+#include <fstream>
+#include <iostream>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
--- doc++-3.4.10/src/equate.cc	2002-05-02 21:13:10.000000000 +0200
+++ doc++-3.4.10/src/equate.cc	2012-09-17 11:25:42.850669366 +0200
@@ -23,9 +23,9 @@
 
 #include "config.h"
 
-#include <fstream.h>
+#include <fstream>
 #include <getopt.h>
-#include <iostream.h>
+#include <iostream>
 #include <stdio.h>
 #include <string.h>
 
--- doc++-3.4.10/src/html.cc	2001-02-17 07:34:49.000000000 +0100
+++ doc++-3.4.10/src/html.cc	2012-09-17 11:24:07.978824681 +0200
@@ -31,7 +31,7 @@
 #include <direct.h>
 #endif
 #include <errno.h>
-#include <iostream.h>
+#include <iostream>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
--- doc++-3.4.10/src/java.ll	2001-11-25 18:04:12.000000000 +0100
+++ doc++-3.4.10/src/java.ll	2012-09-17 11:24:19.138834603 +0200
@@ -26,7 +26,7 @@
 
 #include <assert.h>
 #include <ctype.h>
-#include <iostream.h>
+#include <iostream>
 #include <stdio.h>
 
 #include "doc.h"
--- doc++-3.4.10/src/main.cc	2002-05-09 08:11:14.000000000 +0200
+++ doc++-3.4.10/src/main.cc	2012-09-17 11:25:30.650719070 +0200
@@ -25,7 +25,7 @@
 #include "config.h"
 
 #include <assert.h>
-#include <fstream.h>
+#include <fstream>
 #include <getopt.h>
 #include <locale.h>
 #include <stdio.h>
--- doc++-3.4.10/src/nametable.cc	2000-04-08 23:11:54.000000000 +0200
+++ doc++-3.4.10/src/nametable.cc	2012-09-17 11:25:58.894591128 +0200
@@ -22,7 +22,7 @@
 */
 
 #include <assert.h>
-#include <iostream.h>
+#include <iostream>
 #include <stdlib.h>
 #include <string.h>
 
--- doc++-3.4.10/src/nametable.h	2000-04-08 23:11:56.000000000 +0200
+++ doc++-3.4.10/src/nametable.h	2012-09-17 11:22:07.826207198 +0200
@@ -25,7 +25,7 @@
 #define	_NAME_TABLE_H
 
 #include <assert.h>
-#include <iostream.h>
+#include <iostream>
 
 #include "datahashtable.h"
 
--- doc++-3.4.10/src/php.ll	2001-02-16 23:34:47.000000000 +0100
+++ doc++-3.4.10/src/php.ll	2012-09-17 11:25:18.582759801 +0200
@@ -23,7 +23,7 @@
 %{
 #include <assert.h>
 #include <ctype.h>
-#include <iostream.h>
+#include <iostream>
 #include <stdio.h>
 
 #include "doc.h"
--- doc++-3.4.10/src/tex2gif.cc	2001-08-07 20:55:40.000000000 +0200
+++ doc++-3.4.10/src/tex2gif.cc	2012-09-17 11:26:06.698547836 +0200
@@ -21,8 +21,8 @@
   Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
 
-#include <iostream.h>
-#include <fstream.h>
+#include <iostream>
+#include <fstream>
 #include <stdio.h>
 #include <string.h>
 
: Call 'process-substitution/fallback' upon
'network-error?'.
* tests/substitute.scm ("substitute, first URL has narinfo but lacks nar, second URL unauthorized")
("substitute, first URL has narinfo but nar is 404, both URLs authorized")
("substitute, first URL has narinfo but nar is 404, one URL authorized")
("substitute, narinfo is available but nar is missing"): New tests.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-09-24 17:59:04 +0200'>2022-09-24</span></td><td><a href='/guix/commit/tests/substitute.scm?id=08023bcab35faafcf3e9c77babe910d9ece240d2'>substitute: Test behavior with unroutable substitute server addresses.</a><span class='msg-avail'>...<span class='msg-tooltip'>* tests/substitute.scm (%unroutable-substitute-url): New variable.
("query narinfo signed with authorized key, unroutable URL first")
("substitute, authorized key, first substitute URL is unroutable"): New
tests.
</span></span></td><td>Ludovic Courtès</td></tr>