Make error

[Chris Tulloch]

Hello, 
Have been trying to compile DDD 3.3.8, and get this error
Is this .h file supposed to be with DDD, or included from elsewhere in the 
system.? 
If from system, what software package is needed.

Thanks.
Chris Tulloch

make[1]: Entering directory `/usr/local/build/ddd-3.3.8/libiberty'
if [ x"" != x ] && [ ! -d pic ]; then \
  mkdir pic; \
else true; fi
touch stamp-picdir
make[1]: *** No rule to make target `../include/xregex.h', needed by 
`regex.o'.  Stop.
make[1]: Leaving directory `/usr/local/build/ddd-3.3.8/libiberty'
make: *** [all-recursive] Error 1