diff -NrU5 CRF++-0.50.orig/freelist.h CRF++-0.50/freelist.h
--- CRF++-0.50.orig/freelist.h	2008-06-15 22:42:21.000000000 +0200
+++ CRF++-0.50/freelist.h	2008-06-15 22:47:44.000000000 +0200
@@ -7,10 +7,11 @@
 //
 #ifndef CRFPP_FREELIST_H__
 #define CRFPP_FREELIST_H__
 
 #include <vector>
+#include <cstring>
 
 namespace CRFPP {
   template <class T>
   class Length {
   public:
diff -NrU5 CRF++-0.50.orig/param.h CRF++-0.50/param.h
--- CRF++-0.50.orig/param.h	2008-06-15 22:42:21.000000000 +0200
+++ CRF++-0.50/param.h	2008-06-15 22:44:33.000000000 +0200
@@ -28,11 +28,11 @@
     }
     return result;
   }
 
   template <>
-  static std::string lexical_cast<std::string, std::string>(std::string arg) {
+  std::string lexical_cast<std::string, std::string>(std::string arg) {
     return arg;
   }
 
   struct Option {
     const char *name;