Newbie: Does GNU prolog compile dynamic predicates?

[Berni Elbourn]

dynamic( fred ).
doit:-
        asserta( fred( 1 ) ),
        fred( X ),
        write( X ).
initialization( doit ). 

Why does the compilation fial with the undefined reference?

address@hidden:~/prolog > gplc d.pl
/usr/lib/gprolog-1.2.1/lib/libbips_pl.a(os_interf_c.o): In function 
`Temporary_File_3':
os_interf_c.o(.text+0x1518): the use of `tempnam' is dangerous, better use 
`mkstemp'
/usr/lib/gprolog-1.2.1/lib/libbips_pl.a(os_interf_c.o): In function 
`Temporary_Name_2':
os_interf_c.o(.text+0x1487): the use of `mktemp' is dangerous, better use 
`mkstemp'
/tmp/gplcgVjwX9.o: In function `predicate(doit/0)':
/tmp/gplcgVjwX9.o(.text+0xd0): undefined reference to `predicate(fred/1)'
collect2: ld returned 1 exit status
compilation failed.