Forgot the patch.

flex-2.5.35-gcc44.patch

@@ -0,0 +1,22 @@
+diff -urNp flex-2.5.35.orig/flex.skl flex-2.5.35/flex.skl
+--- flex-2.5.35.orig/flex.skl	2009-04-20 03:09:46.000000000 +0530
++++ flex-2.5.35/flex.skl	2009-04-20 07:46:58.000000000 +0530
+@@ -217,6 +217,7 @@ m4preproc_include(`flexint.h')
+ /* begin standard C++ headers. */
+ #include <iostream> 
+ #include <errno.h>
++#include <cstdio>
+ #include <cstdlib>
+ #include <cstring>
+ /* end standard C++ headers. */
+diff -urNp flex-2.5.35.orig/skel.c flex-2.5.35/skel.c
+--- flex-2.5.35.orig/skel.c	2009-04-20 03:09:46.000000000 +0530
++++ flex-2.5.35/skel.c	2009-04-20 07:46:40.000000000 +0530
+@@ -284,6 +284,7 @@ const char *skel[] = {
+   "/* begin standard C++ headers. */",
+   "#include <iostream> ",
+   "#include <errno.h>",
++  "#include <cstdio>",
+   "#include <cstdlib>",
+   "#include <cstring>",
+   "/* end standard C++ headers. */",

flex.spec

@@ -1,7 +1,7 @@
 Summary: A tool for creating scanners (text pattern recognizers)
 Name: flex
 Version: 2.5.35
-Release: 4%{?dist}
+Release: 5%{?dist}
 License: BSD
 Group: Development/Tools
 URL: http://flex.sourceforge.net/
@@ -80,7 +80,7 @@ rm -rf ${RPM_BUILD_ROOT}
 %{_infodir}/flex.info*
 
 %changelog
-* Mon Apr 20 2009 Debarshi Ray <rishi@fedoraproject.org> - 2.5.35-4
+* Mon Apr 20 2009 Debarshi Ray <rishi@fedoraproject.org> - 2.5.35-5
 - Resolves: #496548.
 
 * Mon Apr 20 2009 Petr Machata <pmachata@redhat.com> - 2.5.35-4