Re: [Caml-list] Has anybody gotten delimcc to work?

["Nicolás Ojeda Bär" <nicolas.ojeda.bar@lexifi.com>]

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Hello Mike,

Indeed the opam-repository is just a bunch of metadata and the opam-publish
tool is used to update this metadata. Typically this is done by the opam
package maintainer which may or may not be the package author (the latter
in this case).

In order to submit a patch to the delimcc package you need to figure out
the upstream repository. Typically you can do this by looking in the opam
metadata. In this case, the opam package is maintained at
https://github.com/zinid/delimcc, but there is no public repository of the
upstream source, rather it is distributed as a tar file by the author (Oleg
Kiselyov; see
http://okmij.org/ftp/continuations/implementations.html#caml-shift).

I went ahead and submitted a patch to the package maintainer (
https://github.com/zinid/delimcc/pull/1) and also sent it by email to Oleg
so that the upstream sources can be amended.

Best wishes,
Nicolás


On Fri, Feb 23, 2018 at 4:18 AM, Michael C Vanier <mvanier42@gmail.com>
wrote:

> So... I was trying to figure out how to make a pull request on the delimcc
> repo (if there is one) and it was an exercise in frustration.  The
> "opam-publish" tool doesn't seem to work anymore with recent ocaml builds
> due to a nest of dependency issues:
>
> =====
>
> > opam install opam-publish
> The following dependencies couldn't be met:
>   - opam-publish -> opam-lib (= 1.2.0 | = 1.2.2) -> dose < 3.4.0 -> extlib
> < 1.7.0
>   - opam-publish -> opam-lib (= 1.2.0 | = 1.2.2) -> dose < 3.4.0 ->
> extlib-compat < 1.7.0
>   - opam-publish -> opam-lib (= 1.2.0 | = 1.2.2) -> dose < 3.4.0 ->
> ocamlgraph <= 1.8.5
>   - opam-publish -> publish -> opam-publish > 0.3.4 -> opam-lib > 1.2.2 ->
> jsonm -> uutf (<= 0.9.4 | >= 1.0.0)
>   - opam-publish -> publish -> opam-publish > 0.3.4 -> opam-lib > 1.2.2 ->
> cmdliner <= 0.9.8
>   - opam-publish -> publish -> opam-lib (= 1.2.2 | > 1.2.2) -> cmdliner <=
> 0.9.8
>   - opam-publish -> publish -> opam-lib (= 1.2.2 | > 1.2.2) -> dose <
> 3.4.0 -> ocamlgraph <= 1.8.5
>   - opam-publish -> publish -> opam-lib (= 1.2.2 | > 1.2.2) -> dose <
> 3.4.0 -> extlib-compat < 1.7.0
>   - opam-publish -> publish -> opam-lib (= 1.2.2 | > 1.2.2) -> dose <
> 3.4.0 -> extlib < 1.7.0
>   - opam-publish -> publish -> opam-lib (= 1.2.2 | > 1.2.2) -> jsonm ->
> uutf (<= 0.9.4 | >= 1.0.0)
> Your request can't be satisfied:
>   - cmdliner.0.9.4 is in conflict with uutf.1.0.1
>   - extlib-compat<1.7.0 is not available because your system doesn't
> comply with ocaml-version < "4.05.0".
>   - extlib<1.7.0 is not available because your system doesn't comply with
> ocaml-version < "4.05.0".
>   - ocamlgraph.1.8.5 is not available because your system doesn't comply
> with ocaml-version < "4.06.0".
>   - ocamlgraph<=1.8.5 is not available because your system doesn't comply
> with ocaml-version < "4.06.0".
>   - uutf<=0.9.4 is not available because your system doesn't comply with
> ocaml-version >= "4.00.0" & ocaml-version < "4.06.0".
>
> No solution found, exiting
>
> =====
>
> I tried forking the opam-repository repo but there is only metadata about
> the various packages and not the actual code to make a patch on.  Is there
> some documentation on how to submit a bug fix to a package?  Sorry if this
> is a dumb question.
>
> Mike
>
> On 2/22/18 3:58 PM, Michael C Vanier wrote:
>
> It works!  Thank you so much Nicolas!
>
> Mike
>
> On 2/22/18 3:42 PM, Nicolás Ojeda Bär wrote:
>
> Dear Mike,
>
> I was able to successfully load delimcc into the toplevel after applying
> the tiny patch below.
> You can give it a try by doing:
>
>   opam source delimcc
>   cd delimcc.(version)
>   (apply patch)
>   opam pin add .
>
> (you have to replace the stuff between parentheses by whatever is correct
> in your setup.)
>
> diff --git a/stacks.c b/stacks.c
> index fdab2a7..5765710 100644
> --- a/stacks.c
> +++ b/stacks.c
> @@ -203,13 +203,13 @@ value copy_stack_fragment(const value vek1)
>  #endif
>
>    if (size < Max_young_wosize) {
> -    block = alloc(size, 0);
> +    block = caml_alloc(size, 0);
>      memcpy(&Field(block, 0), tp2, size * sizeof(value));
>    } else {
> -    block = alloc_shr(size, 0);
> +    block = caml_alloc_shr(size, 0);
>      mlsize_t i;
>      for (i = 0; i < size; i++)
> -      initialize(&Field(block, i), tp2[i]);
> +      caml_initialize(&Field(block, i), tp2[i]);
>    }
>
>    /* We check the invariants after the allocation of block, which may
> @@ -382,4 +382,3 @@ value dbg_note(const value message)
>    fprintf(stderr,"%s\n",String_val(message));
>    return Val_unit;
>  }
>
> Hope it helps,
> Nicolás
>
>
>
> On Fri, Feb 23, 2018 at 12:18 AM, Michael C Vanier <
> mvanier@cms.caltech.edu> wrote:
>
>> I've been trying to use the delimcc delimited continuation library, but
>> so far I've been unsuccessful.  I'm using OCaml 4.06.1 and I've tried it on
>> both Mac OS X (High Sierra) and Ubuntu MATE 17.10. I'm fine sticking to
>> bytecode.  The opam package installs correctly but when you try to run it
>> you get errors from the dynamically-linked libraries.  On Mac OS X I get
>> this:
>>
>> # #require "delimcc";;
>> Cannot load required shared library dlldelimcc.
>> Reason: /Users/mvanier/.opam/4.06.1/lib/stublibs/dlldelimcc.so:
>> dlopen(/Users/mvanier/.opam/4.06.1/lib/stublibs/dlldelimcc.so, 10):
>> Symbol not found: _alloc
>>   Referenced from: /Users/mvanier/.opam/4.06.1/lib/stublibs/dlldelimcc.so
>>   Expected in: flat namespace
>>  in /Users/mvanier/.opam/4.06.1/lib/stublibs/dlldelimcc.so.
>>
>> And on Ubuntu I get this:
>>
>> # #require "delimcc";;
>> /home/mvanier/.opam/4.06.1/lib/delimcc: added to search path
>> /home/mvanier/.opam/4.06.1/lib/delimcc/delimcc.cma: loaded
>> Cannot load required shared library dlldelimcc.
>> Reason: /Users/mvanier/.opam/4.06.1/lib/stublibs/dlldelimcc.so:
>> dlopen(/Users/mvanier/.opam/4.06.1/lib/stublibs/dlldelimcc.so, 10):
>> Symbol not found: initialize.
>>
>> However, in either case I can do:
>>
>> # open Delimcc;;
>>
>> and it reports no errors, but then if I try e.g.:
>>
>> # shift;;
>> Reference to undefined global `Delimcc`
>>
>> so it appears the library isn't there or isn't functional. Compiling from
>> the delimcc source also appears to work, but gcc warns about implicit
>> declarations of "alloc", "alloc_shr" and "initialize" when compiling
>> stacks.c, which makes sense.  Compiling any of the test programs also fails.
>>
>> So it appears that this library no longer works.  Does anyone know any
>> way to make it work?
>>
>> Thanks in advance,
>>
>> Mike
>>
>>
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>
>
>
>

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