Error: sstream: No such file or directory

hi DDD users,

I am trying to install ddd-3.3.11 on my SUN workstation.  configure works fine but when use make I get the following error:


Making all in themes
Making all in vsllib
Making all in ddd
make  all-am
source='ddd.C' object='ddd.o' libtool=no \
DEPDIR=.deps depmode=gcc /bin/bash ../depcomp \
g++ -DHAVE_CONFIG_H -I. -I. -I.   -I./.. -isystem /usr/openwin/include   -O2 -g -Wall -W -Wwrite-strings -trigraphs -c -o ddd.o ddd.C
In file included from ddd.h:32,
                 from ddd.C:135:
strclass.h:410: sstream: No such file or directory
In file included from AsyncAgent.h:56,
                 from LiterateA.h:61,
                 from TTYAgent.h:32,
                 from GDBAgent.h:44,
                 from Command.h:33,
                 from DataDisp.h:54,
                 from ddd.C:187:
Agent.h:95: sstream: No such file or directory
In file included from GraphNode.h:32,
                 from Graph.h:34,
                 from DispGraph.h:39,
                 from ddd.C:190:
GraphNodeI.h:36: sstream: No such file or directory
*** Error code 1
make: Fatal error: Command failed for target `ddd.o'
Current working directory /dmip/kundusj/Softwares/ddd_3_3_11/ddd-3.3.11/ddd
*** Error code 1
make: Fatal error: Command failed for target `all'
Current working directory /dmip/kundusj/Softwares/ddd_3_3_11/ddd-3.3.11/ddd
*** Error code 1
make: Fatal error: Command failed for target `all-recursive'




Can anyone suggest how to proceed to get rid of the error.

Thanks in advance,

Ravi.


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