diff --git a/ChangeLog b/ChangeLog
index 32ef88f..2ea96ea 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,19 @@
+2002-12-04  Bruno Haible  <bruno@clisp.org>
+
+	Portability fixes.
+	* src/positions.h (Positions::LASTCHAR, Positions::MAX_KEY_POS,
+	PositionIterator::EOS): Define as compile-time constants using enum.
+	* src/bool-array.cc (Bool_Array::~Bool_Array): Remove const qualifier
+	of pointer to be deleted.
+	* src/input.cc (Input::~Input): Likewise.
+	* src/keyword.cc (KeywordExt::delete_selchars): Likewise.
+	* src/main.cc (main): Likewise.
+	* src/hash-table.cc (Hash_Table::~Hash_Table): Limit scope of 'for'
+	variables.
+	* src/search.cc (Search::prepare_asso_values): Use a static_cast to
+	convert from time_t to long. This is possible because ISO C 99 says
+	time_t is a numeric type.
+
 2002-11-20  Bruno Haible  <bruno@clisp.org>
 
 	* src/search.cc (Search::find_asso_values): Avoid gcc warnings about
diff --git a/src/bool-array.cc b/src/bool-array.cc
index a10f22d..330ca17 100644
--- a/src/bool-array.cc
+++ b/src/bool-array.cc
@@ -35,7 +35,7 @@ Bool_Array::~Bool_Array ()
     fprintf (stderr, "\ndumping boolean array information\n"
              "size = %d\niteration number = %d\nend of array dump\n",
              _size, _iteration_number);
-  delete[] _storage_array;
+  delete[] const_cast<unsigned int *>(_storage_array);
 }
 
 #ifndef __OPTIMIZE__
diff --git a/src/hash-table.cc b/src/hash-table.cc
index 6a2be7c..e00a456 100644
--- a/src/hash-table.cc
+++ b/src/hash-table.cc
@@ -90,10 +90,12 @@ Hash_Table::~Hash_Table ()
       int field_width;
 
       field_width = 0;
-      for (int i = _size - 1; i >= 0; i--)
-        if (_table[i])
-          if (field_width < _table[i]->_selchars_length)
-            field_width = _table[i]->_selchars_length;
+      {
+        for (int i = _size - 1; i >= 0; i--)
+          if (_table[i])
+            if (field_width < _table[i]->_selchars_length)
+              field_width = _table[i]->_selchars_length;
+      }
 
       fprintf (stderr,
                "\ndumping the hash table\n"
diff --git a/src/input.cc b/src/input.cc
index fbb0bea..3c81ba4 100644
--- a/src/input.cc
+++ b/src/input.cc
@@ -915,8 +915,8 @@ Input::read_input ()
 Input::~Input ()
 {
   /* Free allocated memory.  */
-  delete[] _return_type;
-  delete[] _struct_tag;
-  delete[] _struct_decl;
+  delete[] const_cast<char*>(_return_type);
+  delete[] const_cast<char*>(_struct_tag);
+  delete[] const_cast<char*>(_struct_decl);
   delete[] _input;
 }
diff --git a/src/keyword.cc b/src/keyword.cc
index 36cfa6d..a784e07 100644
--- a/src/keyword.cc
+++ b/src/keyword.cc
@@ -130,7 +130,7 @@ KeywordExt::init_selchars_multiset (bool use_all_chars, const Positions& positio
 void
 KeywordExt::delete_selchars ()
 {
-  delete[] _selchars;
+  delete[] const_cast<unsigned int *>(_selchars);
 }
 
 
diff --git a/src/main.cc b/src/main.cc
index 9878a3b..ec772c8 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -134,12 +134,12 @@ main (int argc, char *argv[])
         do
           {
             KeywordExt *next_keyword = keyword->_duplicate_link;
-            delete[] keyword->_selchars;
+            delete[] const_cast<unsigned int *>(keyword->_selchars);
             if (keyword->_rest != empty_string)
-              delete[] keyword->_rest;
+              delete[] const_cast<char*>(keyword->_rest);
             if (!(keyword->_allchars >= inputter._input
                   && keyword->_allchars < inputter._input_end))
-              delete[] keyword->_allchars;
+              delete[] const_cast<char*>(keyword->_allchars);
             delete keyword;
             keyword = next_keyword;
           }
diff --git a/src/positions.h b/src/positions.h
index 78f57c5..88d9584 100644
--- a/src/positions.h
+++ b/src/positions.h
@@ -33,11 +33,11 @@ class Positions
   friend class PositionIterator;
 public:
   /* Denotes the last char of a keyword, depending on the keyword's length.  */
-  static const int      LASTCHAR = 0;
+  enum {                LASTCHAR = 0 };
 
   /* Maximum key position specifiable by the user.
      Note that this must fit into the element type of _positions[], below.  */
-  static const int      MAX_KEY_POS = 255;
+  enum {                MAX_KEY_POS = 255 };
 
   /* Constructors.  */
                         Positions ();
@@ -89,7 +89,7 @@ public:
                         PositionIterator (Positions const& positions);
 
   /* End of iteration marker.  */
-  static const int      EOS = -1;
+  enum {                EOS = -1 };
 
   /* Retrieves the next position, or EOS past the end.  */
   int                   next ();
diff --git a/src/search.cc b/src/search.cc
index 08d0a9f..5308690 100644
--- a/src/search.cc
+++ b/src/search.cc
@@ -778,7 +778,7 @@ Search::prepare_asso_values ()
 
   if (option[RANDOM] || option.get_jump () == 0)
     /* We will use rand(), so initialize the random number generator.  */
-    srand (reinterpret_cast<long>(time (0)));
+    srand (static_cast<long>(time (0)));
 
   _initial_asso_value = (option[RANDOM] ? -1 : option.get_initial_asso_value ());
   _jump = option.get_jump ();