Re: [m-users.] [Beginner] Using a functions from 'libs'

Volker Wysk <[email protected]> Sun, 16 Oct 2022 13:46:11 +0200
Newsgroups	gmane.comp.lang.mercury.general
Message-ID	<[email protected]>
Am Sonntag, dem 16.10.2022 um 16:31 +0530 schrieb Razetime:
> My bad. What is the problem here? Is it a problem with
> https://github.com/Mercury-Language/mercury/blob/master/compiler/md5.m
> ?
> 
> Making Mercury/int3s/a05.int3
> Making Mercury/ints/a05.int
> Making Mercury/cs/a05.c
> Making Mercury/cs/md5.c
> Making Mercury/os/a05.o
> Making Mercury/os/md5.o
> Making a05
> Making md5
> ** Error making `md5'.
> Mercury/os/md5_init.o:md5_init.c:function mercury_init: error:
> undefined reference to '<predicate 'main'/2 mode 0>'
> collect2: error: ld returned 1 exit status

The message says that you don't have a main/2 predicate. Have you started
the compiler with --make and the module containing main/2? Then it should
trace the necessary modules automatically.

Volker

> 
> On 10/16/22, Volker Wysk <[email protected]> wrote:
> > You've mixed up the input and output arguments in the declaration of
> > main/2.
> > 
> > Volker
> > 
> > 
> > Am Sonntag, dem 16.10.2022 um 16:06 +0530 schrieb Razetime:
> > > For this program I tried using mmc --make and i got the following error.
> > > 
> > > :- module a05.
> > > 
> > > :- interface.
> > > :- import_module io.
> > > :- pred main(io::uo,io::di) is det.
> > > 
> > > :- implementation.
> > > :- import_module list.
> > > :- import_module md5.
> > > 
> > > main(!IO):-
> > >   S0=md5sum("abc3231929"),
> > >   print_line(S0,!IO)
> > >   .
> > > 
> > > 
> > > $ mmc --make a05 md5
> > > Making Mercury/int3s/a05.int3
> > > Making Mercury/ints/a05.int
> > > Making Mercury/cs/a05.c
> > > a05.m:013: In clause for `main(uo, di)':
> > > a05.m:013:   in argument 2 of call to predicate `io.print_line'/3:
> > > a05.m:013:   unique-mode error: the called procedure would clobber its
> > > a05.m:013:   argument, but variable `STATE_VARIABLE_IO_0' is still live.
> > > ** Error making `Mercury/cs/a05.c'.
> > > 
> > > How do i make sure the variable is not live?
> > > 
> > > On 10/16/22, Razetime <[email protected]> wrote:
> > > > Oh, makes sense. The md5.m file is not part of the distribution so i
> > > > have to compile it along with my program. Thanks.
> > > > 
> > > > On 10/16/22, Julien Fischer <[email protected]> wrote:
> > > > > 
> > > > > 
> > > > > On Sun, 16 Oct 2022, Razetime wrote:
> > > > > 
> > > > > > using the name md5 like follows:
> > > > > > :- module a05.
> > > > > > 
> > > > > > :- interface.
> > > > > > :- import_module io.
> > > > > > :- pred main(io::uo,io::di) is det.
> > > > > > 
> > > > > > :- implementation.
> > > > > > :- import_module list.
> > > > > > :- import_module md5.
> > > > > > 
> > > > > > main(!IO):-
> > > > > >  S0=md5sum("abc3231929"),
> > > > > >  print_line(S0,!IO)
> > > > > >  .
> > > > > > 
> > > > > > gives me this error:
> > > > > > $ mmcb a05.m
> > > > > > ~
> > > > > >                                                 │mercury_compile:
> > > > > > cannot find `Mercury/ints/md5.int' in directories .,
> > > > > > ~
> > > > > >                                                 │
> > > > > > /usr/lib/mercury/ints
> > > > > 
> > > > > Using mmc directly like that is only for building single module
> > > > > programs.  To build a program consisting of multiple modules, use
> > > > > the --make option, e.g.
> > > > > 
> > > > >      $ mmc --make a05
> > > > > 
> > > > > (See the "Using the Mercury compile" section of the Mercury users's
> > > > > guide for details.)
> > > > > 
> > > > > Julien.
> > > > 
> > > _______________________________________________
> > > users mailing list
> > > [email protected]
> > > https://lists.mercurylang.org/listinfo/users
> > 
> >

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