when running ddd

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Hi,

I have a problem when trying to run 'make check' after installing it.
The error is as follows:

address@hidden ddd-3.2.1]# make check
==> Making check in ./ddd...
make[1]: Entering directory `/usr/ddd-3.2.1/ddd'
XUSERFILESEARCHPATH=%N XAPPLRESDIR=. ./ddd  cxxtest
./ddd: error in loading shared libraries: libXm.so.1: cannot open shared object 
file: No such file or directory
make[1]: *** [check] Error 127
make[1]: Leaving directory `/usr/ddd-3.2.1/ddd'
make: *** [check] Error 2

My system is deficient in any necessary component?
Please help me.


Thanks.

Best,
Eun-seo Choi

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