diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 2f08f4f9897..46340e3d8f9 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -2,7 +2,8 @@
 
 	* include/bits/locale_facets.h (ctype<char>): Remove throw specs not in
 	base class signature.
-
+	* config/os/*/bits/ctype_inline.h (is): Same.
+	
 2000-12-13  Benjamin Kosnik  <bkoz@redhat.com>
 
 	* config/os/generic/bits/ctype_base.h (ctype_base): Consistency
diff --git a/libstdc++-v3/config/os/aix/bits/ctype_inline.h b/libstdc++-v3/config/os/aix/bits/ctype_inline.h
index c376f356723..16e011c4a9a 100644
--- a/libstdc++-v3/config/os/aix/bits/ctype_inline.h
+++ b/libstdc++-v3/config/os/aix/bits/ctype_inline.h
@@ -36,12 +36,12 @@
   
   bool
   ctype<char>::
-  is(mask __m, char __c) const throw()
+  is(mask __m, char __c) const 
   { return __OBJ_DATA(__lc_ctype)->mask[__c] & __m; }
 
   const char*
   ctype<char>::
-  is(const char* __low, const char* __high, mask* __vec) const throw()
+  is(const char* __low, const char* __high, mask* __vec) const 
   {
     const int __bitmasksize = sizeof(mask) * 8;
     for (;__low < __high; ++__vec, ++__low)
@@ -57,7 +57,7 @@
 
   const char*
   ctype<char>::
-  scan_is(mask __m, const char* __low, const char* __high) const throw()
+  scan_is(mask __m, const char* __low, const char* __high) const 
   {
     while (__low < __high && !this->is(__m, *__low))
       ++__low;
@@ -66,7 +66,7 @@
 
   const char*
   ctype<char>::
-  scan_not(mask __m, const char* __low, const char* __high) const throw()
+  scan_not(mask __m, const char* __low, const char* __high) const 
   {
     while (__low < __high && this->is(__m, *__low) != 0)
       ++__low;
diff --git a/libstdc++-v3/config/os/bsd/freebsd/bits/ctype_inline.h b/libstdc++-v3/config/os/bsd/freebsd/bits/ctype_inline.h
index 64566c27bf1..b51867dcac2 100644
--- a/libstdc++-v3/config/os/bsd/freebsd/bits/ctype_inline.h
+++ b/libstdc++-v3/config/os/bsd/freebsd/bits/ctype_inline.h
@@ -36,7 +36,7 @@
   
   bool
   ctype<char>::
-  is(mask __m, char __c) const throw()
+  is(mask __m, char __c) const
   { 
     if (__m & (digit | xdigit))
       return __isctype(__c, __m);
@@ -46,7 +46,7 @@
 
   const char*
   ctype<char>::
-  is(const char* __low, const char* __high, mask* __vec) const throw()
+  is(const char* __low, const char* __high, mask* __vec) const
   {
     const int __bitmasksize = sizeof(mask) * 8;
     for (;__low < __high; ++__vec, ++__low)
@@ -62,7 +62,7 @@
 
   const char*
   ctype<char>::
-  scan_is(mask __m, const char* __low, const char* __high) const throw()
+  scan_is(mask __m, const char* __low, const char* __high) const
   {
     while (__low < __high && !this->is(__m, *__low))
       ++__low;
@@ -71,7 +71,7 @@
 
   const char*
   ctype<char>::
-  scan_not(mask __m, const char* __low, const char* __high) const throw()
+  scan_not(mask __m, const char* __low, const char* __high) const
   {
     while (__low < __high && this->is(__m, *__low) != 0)
       ++__low;
diff --git a/libstdc++-v3/config/os/bsd/netbsd/bits/ctype_inline.h b/libstdc++-v3/config/os/bsd/netbsd/bits/ctype_inline.h
index 23a6d19bbb2..2d72d9896cf 100644
--- a/libstdc++-v3/config/os/bsd/netbsd/bits/ctype_inline.h
+++ b/libstdc++-v3/config/os/bsd/netbsd/bits/ctype_inline.h
@@ -36,12 +36,12 @@
   
   bool
   ctype<char>::
-  is(mask __m, char __c) const throw()
+  is(mask __m, char __c) const
   { return _M_table[(unsigned char)(__c)] & __m; }
 
   const char*
   ctype<char>::
-  is(const char* __low, const char* __high, mask* __vec) const throw()
+  is(const char* __low, const char* __high, mask* __vec) const
   {
     const int __bitmasksize = sizeof(mask) * 8;
     for (;__low < __high; ++__vec, ++__low)
@@ -57,7 +57,7 @@
 
   const char*
   ctype<char>::
-  scan_is(mask __m, const char* __low, const char* __high) const throw()
+  scan_is(mask __m, const char* __low, const char* __high) const
   {
     while (__low < __high && !this->is(__m, *__low))
       ++__low;
@@ -66,7 +66,7 @@
 
   const char*
   ctype<char>::
-  scan_not(mask __m, const char* __low, const char* __high) const throw()
+  scan_not(mask __m, const char* __low, const char* __high) const
   {
     while (__low < __high && this->is(__m, *__low) != 0)
       ++__low;
@@ -77,3 +77,4 @@
 
 
 
+
diff --git a/libstdc++-v3/config/os/generic/bits/ctype_inline.h b/libstdc++-v3/config/os/generic/bits/ctype_inline.h
index 74429a2a059..98c7e3d0309 100644
--- a/libstdc++-v3/config/os/generic/bits/ctype_inline.h
+++ b/libstdc++-v3/config/os/generic/bits/ctype_inline.h
@@ -41,7 +41,7 @@
 
   bool
   ctype<char>::
-  is(mask __m, char __c) const throw()
+  is(mask __m, char __c) const
   { 
     bool __ret;
     switch (__m)
@@ -88,7 +88,7 @@
    
   const char*
   ctype<char>::
-  is(const char* __low, const char* __high, mask* __vec) const throw()
+  is(const char* __low, const char* __high, mask* __vec) const
   {
     const int __bitmasksize = 11; // Highest bitmask in ctype_base == 10
     for (;__low < __high; ++__vec, ++__low)
@@ -104,7 +104,7 @@
 
   const char*
   ctype<char>::
-  scan_is(mask __m, const char* __low, const char* __high) const throw()
+  scan_is(mask __m, const char* __low, const char* __high) const
   {
     while (__low < __high && !this->is(__m, *__low))
       ++__low;
@@ -113,7 +113,7 @@
 
   const char*
   ctype<char>::
-  scan_not(mask __m, const char* __low, const char* __high) const throw()
+  scan_not(mask __m, const char* __low, const char* __high) const
   {
     while (__low < __high && this->is(__m, *__low) != 0)
       ++__low;
diff --git a/libstdc++-v3/config/os/gnu-linux/bits/ctype_inline.h b/libstdc++-v3/config/os/gnu-linux/bits/ctype_inline.h
index 9fe7b16f7b6..83563a9ade7 100644
--- a/libstdc++-v3/config/os/gnu-linux/bits/ctype_inline.h
+++ b/libstdc++-v3/config/os/gnu-linux/bits/ctype_inline.h
@@ -36,12 +36,12 @@
   
   bool
   ctype<char>::
-  is(mask __m, char __c) const throw()
+  is(mask __m, char __c) const
   { return _M_table[__c] & __m; }
 
   const char*
   ctype<char>::
-  is(const char* __low, const char* __high, mask* __vec) const throw()
+  is(const char* __low, const char* __high, mask* __vec) const
   {
     const int __bitmasksize = sizeof(mask) * 8;
     for (;__low < __high; ++__vec, ++__low)
@@ -57,7 +57,7 @@
 
   const char*
   ctype<char>::
-  scan_is(mask __m, const char* __low, const char* __high) const throw()
+  scan_is(mask __m, const char* __low, const char* __high) const
   {
     while (__low < __high && !(_M_table[*__low] & __m))
       ++__low;
@@ -66,7 +66,7 @@
 
   const char*
   ctype<char>::
-  scan_not(mask __m, const char* __low, const char* __high) const throw()
+  scan_not(mask __m, const char* __low, const char* __high) const
   {
     while (__low < __high 
 	   && (_M_table[*__low] & __m) != 0)
diff --git a/libstdc++-v3/config/os/hpux/bits/ctype_base.h b/libstdc++-v3/config/os/hpux/bits/ctype_base.h
index 8b5e0a07252..d11e1e51851 100644
--- a/libstdc++-v3/config/os/hpux/bits/ctype_base.h
+++ b/libstdc++-v3/config/os/hpux/bits/ctype_base.h
@@ -1,6 +1,6 @@
 // Locale support -*- C++ -*-
 
-// Copyright (C) 1997-1999 Free Software Foundation, Inc.
+// Copyright (C) 1997-1999, 2000 Free Software Foundation, Inc.
 //
 // This file is part of the GNU ISO C++ Library.  This library is free
 // software; you can redistribute it and/or modify it under the
@@ -35,25 +35,21 @@
   
   struct ctype_base
   {
-    typedef unsigned int 	mask;
     // Non-standard typedefs.
     typedef const int* 		__to_type;
 
-    enum
-    {
-      space = (1 << 5),	// Whitespace
-      print = (1 << 6),	// Printing
-      cntrl = (1 << 9),	// Control character
-      upper = (1 << 0),	// UPPERCASE
-      lower = (1 << 1),	// lowercase
-      alpha = (1 << 5),	// Alphabetic
-      digit = (1 << 2),	// Numeric
-      punct = (1 << 10),// Punctuation
-      xdigit = (1 << 4),// Hexadecimal numeric
-      alnum = (1 << 11),// Alphanumeric
-      graph = (1 << 7)	// Graphical
-    };
+    // NB: Offsets into ctype<char>::_M_table force a particular size
+    // on the mask type. Because of this, we don't use an enum.
+    typedef unsigned int        mask;   
+    static const mask upper     = 1 << 0;
+    static const mask lower     = 1 << 1;
+    static const mask alpha     = 1 << 2;
+    static const mask digit     = 1 << 3;
+    static const mask xdigit    = 1 << 4;
+    static const mask space     = 1 << 5;
+    static const mask print     = 1 << 6;
+    static const mask graph     = 1 << 7;
+    static const mask cntrl     = 1 << 8;
+    static const mask punct     = 1 << 9;
+    static const mask alnum     = 1 << 10;
   };
-
-
-
diff --git a/libstdc++-v3/config/os/hpux/bits/ctype_inline.h b/libstdc++-v3/config/os/hpux/bits/ctype_inline.h
index 952b0da8c98..35cc3063d4c 100644
--- a/libstdc++-v3/config/os/hpux/bits/ctype_inline.h
+++ b/libstdc++-v3/config/os/hpux/bits/ctype_inline.h
@@ -36,21 +36,28 @@
   
   bool
   ctype<char>::
-  is(mask __m, char __c) const throw()
+  is(mask __m, char __c) const 
   { return _M_table[(unsigned char)(__c)] & __m; }
 
   const char*
   ctype<char>::
-  is(const char* __low, const char* __high, mask* __vec) const throw()
+  is(const char* __low, const char* __high, mask* __vec) const 
   {
-    while (__low < __high)
-      *__vec++ = _M_table[(unsigned char)(*__low++)];
+    const int __bitmasksize = 11; // Highest bitmask in ctype_base == 10
+    for (;__low < __high; ++__vec, ++__low)
+      {
+        mask __m = _M_table[*__low];
+        int __i = 0; // Lowest bitmask in ctype_base == 0
+        while (__i < __bitmasksize && !(__m & static_cast<mask>(1 << __i)))
+          ++__i;
+        *__vec = static_cast<mask>(1 << __i);
+      }
     return __high;
   }
 
   const char*
   ctype<char>::
-  scan_is(mask __m, const char* __low, const char* __high) const throw()
+  scan_is(mask __m, const char* __low, const char* __high) const
   {
     while (__low < __high && !this->is(__m, *__low))
       ++__low;
@@ -59,7 +66,7 @@
 
   const char*
   ctype<char>::
-  scan_not(mask __m, const char* __low, const char* __high) const throw()
+  scan_not(mask __m, const char* __low, const char* __high) const
   {
     while (__low < __high && this->is(__m, *__low) != 0)
       ++__low;
diff --git a/libstdc++-v3/config/os/irix/bits/ctype_inline.h b/libstdc++-v3/config/os/irix/bits/ctype_inline.h
index 4a76dc5c6bd..1b400f24183 100644
--- a/libstdc++-v3/config/os/irix/bits/ctype_inline.h
+++ b/libstdc++-v3/config/os/irix/bits/ctype_inline.h
@@ -36,12 +36,12 @@
   
   bool
   ctype<char>::
-  is(mask __m, char __c) const throw()
+  is(mask __m, char __c) const
   { return (_M_table)[__c] & __m; }
 
   const char*
   ctype<char>::
-  is(const char* __low, const char* __high, mask* __vec) const throw()
+  is(const char* __low, const char* __high, mask* __vec) const
   {
     const int __bitmasksize = sizeof(mask) * 8;
     for (;__low < __high; ++__vec, ++__low)
@@ -57,7 +57,7 @@
 
   const char*
   ctype<char>::
-  scan_is(mask __m, const char* __low, const char* __high) const throw()
+  scan_is(mask __m, const char* __low, const char* __high) const
   {
     while (__low < __high && !((_M_table)[*__low] & __m))
       ++__low;
@@ -66,7 +66,7 @@
 
   const char*
   ctype<char>::
-  scan_not(mask __m, const char* __low, const char* __high) const throw()
+  scan_not(mask __m, const char* __low, const char* __high) const
   {
     while (__low < __high && ((_M_table + 1)[*__low] & __m) != 0)
       ++__low;
diff --git a/libstdc++-v3/config/os/newlib/bits/ctype_inline.h b/libstdc++-v3/config/os/newlib/bits/ctype_inline.h
index b2dd42b2854..61c4bc85898 100644
--- a/libstdc++-v3/config/os/newlib/bits/ctype_inline.h
+++ b/libstdc++-v3/config/os/newlib/bits/ctype_inline.h
@@ -36,12 +36,12 @@
   
   bool
   ctype<char>::
-  is(mask __m, char __c) const throw()
+  is(mask __m, char __c) const
   { return (_M_table + 1)[(unsigned char)(__c)] & __m; }
 
   const char*
   ctype<char>::
-  is(const char* __low, const char* __high, mask* __vec) const throw()
+  is(const char* __low, const char* __high, mask* __vec) const
   {
     const int __bitmasksize = sizeof(mask) * 8;
     for (;__low < __high; ++__vec, ++__low)
@@ -57,7 +57,7 @@
 
   const char*
   ctype<char>::
-  scan_is(mask __m, const char* __low, const char* __high) const throw()
+  scan_is(mask __m, const char* __low, const char* __high) const 
   {
     while (__low < __high && !((_M_table + 1)[(unsigned char)(*__low)] & __m))
       ++__low;
@@ -66,7 +66,7 @@
 
   const char*
   ctype<char>::
-  scan_not(mask __m, const char* __low, const char* __high) const throw()
+  scan_not(mask __m, const char* __low, const char* __high) const
   {
     while (__low < __high 
 	   && ((_M_table + 1)[(unsigned char)(*__low)] & __m) != 0)
diff --git a/libstdc++-v3/config/os/solaris/solaris2.5/bits/ctype_inline.h b/libstdc++-v3/config/os/solaris/solaris2.5/bits/ctype_inline.h
index d6259a44eac..f6719935af0 100644
--- a/libstdc++-v3/config/os/solaris/solaris2.5/bits/ctype_inline.h
+++ b/libstdc++-v3/config/os/solaris/solaris2.5/bits/ctype_inline.h
@@ -36,12 +36,12 @@
   
   bool
   ctype<char>::
-  is(mask __m, char __c) const throw()
+  is(mask __m, char __c) const
   { return (_M_table + 1)[(unsigned char)(__c)] & __m; }
 
   const char*
   ctype<char>::
-  is(const char* __low, const char* __high, mask* __vec) const throw()
+  is(const char* __low, const char* __high, mask* __vec) const
   {
     const int __bitmasksize = sizeof(mask) * 8;
     for (;__low < __high; ++__vec, ++__low)
@@ -57,7 +57,7 @@
 
   const char*
   ctype<char>::
-  scan_is(mask __m, const char* __low, const char* __high) const throw()
+  scan_is(mask __m, const char* __low, const char* __high) const
   {
     while (__low < __high && !((_M_table + 1)[(unsigned char)(*__low)] & __m))
       ++__low;
@@ -66,15 +66,10 @@
 
   const char*
   ctype<char>::
-  scan_not(mask __m, const char* __low, const char* __high) const throw()
+  scan_not(mask __m, const char* __low, const char* __high) const
   {
     while (__low < __high 
 	   && ((_M_table + 1)[(unsigned char)(*__low)] & __m) != 0)
       ++__low;
     return __low;
   }
-
-
-
-
-
diff --git a/libstdc++-v3/config/os/solaris/solaris2.6/bits/ctype_inline.h b/libstdc++-v3/config/os/solaris/solaris2.6/bits/ctype_inline.h
index 2ea6f69b97f..f254e839fb8 100644
--- a/libstdc++-v3/config/os/solaris/solaris2.6/bits/ctype_inline.h
+++ b/libstdc++-v3/config/os/solaris/solaris2.6/bits/ctype_inline.h
@@ -36,12 +36,12 @@
   
   bool
   ctype<char>::
-  is(mask __m, char __c) const throw()
+  is(mask __m, char __c) const
   { return _M_table[__c] & __m; }
 
   const char*
   ctype<char>::
-  is(const char* __low, const char* __high, mask* __vec) const throw()
+  is(const char* __low, const char* __high, mask* __vec) const
   {
     const int __bitmasksize = sizeof(mask) * 8;
     for (;__low < __high; ++__vec, ++__low)
@@ -57,7 +57,7 @@
 
   const char*
   ctype<char>::
-  scan_is(mask __m, const char* __low, const char* __high) const throw()
+  scan_is(mask __m, const char* __low, const char* __high) const
   {
     while (__low < __high && !(_M_table[*__low] & __m))
       ++__low;
@@ -66,15 +66,10 @@
 
   const char*
   ctype<char>::
-  scan_not(mask __m, const char* __low, const char* __high) const throw()
+  scan_not(mask __m, const char* __low, const char* __high) const
   {
     while (__low < __high 
 	   && (_M_table[*__low] & __m) != 0)
       ++__low;
     return __low;
   }
-
-
-
-
-
diff --git a/libstdc++-v3/config/os/solaris/solaris2.7/bits/ctype_inline.h b/libstdc++-v3/config/os/solaris/solaris2.7/bits/ctype_inline.h
index 2ea6f69b97f..f254e839fb8 100644
--- a/libstdc++-v3/config/os/solaris/solaris2.7/bits/ctype_inline.h
+++ b/libstdc++-v3/config/os/solaris/solaris2.7/bits/ctype_inline.h
@@ -36,12 +36,12 @@
   
   bool
   ctype<char>::
-  is(mask __m, char __c) const throw()
+  is(mask __m, char __c) const
   { return _M_table[__c] & __m; }
 
   const char*
   ctype<char>::
-  is(const char* __low, const char* __high, mask* __vec) const throw()
+  is(const char* __low, const char* __high, mask* __vec) const
   {
     const int __bitmasksize = sizeof(mask) * 8;
     for (;__low < __high; ++__vec, ++__low)
@@ -57,7 +57,7 @@
 
   const char*
   ctype<char>::
-  scan_is(mask __m, const char* __low, const char* __high) const throw()
+  scan_is(mask __m, const char* __low, const char* __high) const
   {
     while (__low < __high && !(_M_table[*__low] & __m))
       ++__low;
@@ -66,15 +66,10 @@
 
   const char*
   ctype<char>::
-  scan_not(mask __m, const char* __low, const char* __high) const throw()
+  scan_not(mask __m, const char* __low, const char* __high) const
   {
     while (__low < __high 
 	   && (_M_table[*__low] & __m) != 0)
       ++__low;
     return __low;
   }
-
-
-
-
-