installing ddd in strclass.C 1546 EOF not declared

Dear Sirs

I am compelled to use Open Motif instead of Lesstif, so I tried to 
install DDD from source.
Doing "sudo make install" I obtained the following:

g++ -DHAVE_CONFIG_H -I.  -I./..    -O2 -g -Wall -W -Wwrite-strings 
-trigraphs  -MT strclass.o -MD -MP -MF .deps/strclass.Tpo -c -o 
strclass.o strclass.C
strclass.C: In function ‘std::istream& operator>>(std::istream&, string&)’:
strclass.C:1546:35: error: ‘EOF’ was not declared in this scope
strclass.C:1559:15: error: ‘EOF’ was not declared in this scope
strclass.C: In function ‘int readline(std::istream&, string&, char, int)’:
strclass.C:1589:35: error: ‘EOF’ was not declared in this scope
strclass.C:1602:15: error: ‘EOF’ was not declared in this scope
make[1]: *** [strclass.o] Error 1
make[1]: Leaving directory `/media/users/manager/ddd-3.3.12/ddd'
make: *** [install-recursive] Error 1

the OS is ubuntu 12.4 LT alwais updated

Any Suggestion?
Thank You in advance
Mario De Poli