Re: Newbie: Does GNU prolog compile dynamic predicates?

[Gerald W. Shapiro]

dynamic and initialization are directives. Preceed with :-, i.e.

:- dynamic(fred/1).
:- initialization(doit).

Also note that you probably need to include the cardinality of fred.

Gerald

On Fri, 21 Sep 2001, Berni Elbourn wrote:

> 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.
> 
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