diff --git a/include/ChangeLog b/include/ChangeLog
index 6cc4b8ed62..135105899f 100644
--- a/include/ChangeLog
+++ b/include/ChangeLog
@@ -1,3 +1,7 @@
+2002-04-01  Phil Edwards  <pme@gcc.gnu.org>
+
+	* dyn-string.h:  Also allow IN_GLIBCPP_V3 to redefine names.
+
 2002-03-10  Daniel Jacobowitz <drow@mvista.com>
 
 	* gdb: New directory.
diff --git a/include/dyn-string.h b/include/dyn-string.h
index 315f63fabc..2a771c7a5d 100644
--- a/include/dyn-string.h
+++ b/include/dyn-string.h
@@ -1,5 +1,5 @@
 /* An abstract string datatype.
-   Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
+   Copyright (C) 1998, 1999, 2000, 2002 Free Software Foundation, Inc.
    Contributed by Mark Mitchell (mark@markmitchell.com).
 
 This file is part of GCC.
@@ -45,7 +45,7 @@ typedef struct dyn_string
    names in user programs, the functions that are used in the
    demangler are given implementation-reserved names.  */
 
-#ifdef IN_LIBGCC2
+#if defined(IN_LIBGCC2) || defined(IN_GLIBCPP_V3)
 
 #define dyn_string_init                 __cxa_dyn_string_init
 #define dyn_string_new                  __cxa_dyn_string_new
@@ -66,7 +66,7 @@ typedef struct dyn_string
 #define dyn_string_substring            __cxa_dyn_string_substring
 #define dyn_string_eq                   __cxa_dyn_string_eq
 
-#endif /* IN_LIBGCC2 */
+#endif /* IN_LIBGCC2 || IN_GLIBCPP_V3 */
 
 
 extern int dyn_string_init              PARAMS ((struct dyn_string *, int));
diff --git a/libiberty/ChangeLog b/libiberty/ChangeLog
index feb0379bc1..56bd2312a7 100644
--- a/libiberty/ChangeLog
+++ b/libiberty/ChangeLog
@@ -1,3 +1,10 @@
+2002-04-01  Phil Edwards  <pme@gcc.gnu.org>
+
+	* cp-demangle.c (__cxa_demangle):  Also protect with IN_GLIBCPP_V3.
+	(is_gnu_v3_mangled_ctor, is_gnu_v3_mangled_ctor):  Conditionally
+	not compile if IN_GLIBCPP_V3 defined.
+	* dyn-string.c:  Also allow IN_GLIBCPP_V3 to change allocation scheme.
+
 2002-03-30  Bryce McKinlay  <bryce@waitaki.otago.ac.nz>
 
 	* cp-demangle.c (java_demangle_v3): Don't try to release "demangled"
diff --git a/libiberty/cp-demangle.c b/libiberty/cp-demangle.c
index a130fd8374..4a91700d54 100644
--- a/libiberty/cp-demangle.c
+++ b/libiberty/cp-demangle.c
@@ -3577,7 +3577,7 @@ cp_demangle_type (type_name, result)
   return status;
 }
 
-#ifdef IN_LIBGCC2
+#if defined(IN_LIBGCC2) || defined(IN_GLIBCPP_V3)
 extern char *__cxa_demangle PARAMS ((const char *, char *, size_t *, int *));
 
 /* ia64 ABI-mandated entry point in the C++ runtime library for performing
@@ -3685,7 +3685,7 @@ __cxa_demangle (mangled_name, output_buffer, length, status)
     }
 }
 
-#else /* !IN_LIBGCC2 */
+#else /* ! (IN_LIBGCC2 || IN_GLIBCPP_V3) */
 
 /* Variant entry point for integration with the existing cplus-dem
    demangler.  Attempts to demangle MANGLED.  If the demangling
@@ -3854,7 +3854,7 @@ java_demangle_v3 (mangled)
   return return_value;
 }
 
-#endif /* IN_LIBGCC2 */
+#endif /* IN_LIBGCC2 || IN_GLIBCPP_V3 */
 
 
 /* Demangle NAME in the G++ V3 ABI demangling style, and return either
@@ -3894,6 +3894,7 @@ demangle_v3_with_details (name)
 }
 
 
+#ifndef IN_GLIBCPP_V3
 /* Return non-zero iff NAME is the mangled form of a constructor name
    in the G++ V3 ABI demangling style.  Specifically, return:
    - '1' if NAME is a complete object constructor,
@@ -3936,6 +3937,7 @@ is_gnu_v3_mangled_dtor (name)
   else
     return 0;
 }
+#endif /* IN_GLIBCPP_V3 */
 
 
 #ifdef STANDALONE_DEMANGLER
diff --git a/libiberty/dyn-string.c b/libiberty/dyn-string.c
index c41d7ccac3..1da76c2110 100644
--- a/libiberty/dyn-string.c
+++ b/libiberty/dyn-string.c
@@ -50,7 +50,7 @@ Boston, MA 02111-1307, USA.  */
    abort if an allocation fails.  Instead, percolate an error code up
    through the call chain.  */
 
-#ifdef IN_LIBGCC2
+#if defined(IN_LIBGCC2) || defined(IN_GLIBCPP_V3)
 #define RETURN_ON_ALLOCATION_FAILURE
 #endif