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

[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 <rraghu.11502 at gmail.com> 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 <jfischer at opturion.com> 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.
>