adrien changed the topic of #ocaml to: Discussions about the OCaml programming language | http://www.ocaml.org | OCaml 4.06.0 release notes: https://caml.inria.fr/pub/distrib/ocaml-4.06/notes/Changes | Try OCaml in your browser: http://try.ocamlpro.com | Public channel logs at http://irclog.whitequark.org/ocaml
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<_xvilka_> sorry for this stupid question
<_xvilka_> but never meet this case
<_xvilka_> and can't find any examples
<_xvilka_> how to write a binary file from buffer?
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<_xvilka_> because ridiculously no manual or book mentioning this, apart from opening using "open_out_bin"
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<flux[m]> _xvilka_: Buffer.output_buffer
<flux[m]> or what was the actual problem? binary works everywhere in ocaml as long as the file is opened in binary mode
<_xvilka_> flux[m]: didn't knew the function (or forgot) how to write to the output channel
<_xvilka_> thank you
<flux[m]> happy writing :)
<_xvilka_> haha
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<qbitor> I'm trying to install camlp4 (`opam install camlp4`). This fails because it is not able to install lwt. But I can install lwt alone.
<qbitor> Can anyone tell how it is possible to install camlp4? See more logs at https://vereinte.verwirrung.institute/p/jackline
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<_xvilka_> qbitor: in most cases it is better to migrate to the extension points
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<qbitor> _xvilka_: Not sure, if I understand. Can you explain a bit? thx.
<Fardale> qbitor: what version of dune/jbuilder do you have ?
<qbitor> 1.0+beta18
<Fardale> it has a bug, you need to pin version 1.0+beta17 (opam pin add jbuider 1.0+beta17)
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<qbitor> $ opam pin add jbuider 1.0+beta17
<qbitor> [ERROR] Package jbuider has no version 1.0+beta17
<qbitor> Strange.
<Fardale> qbitor: there is a typo, it's jbuilder not jbuider
<qbitor> fsck
<qbitor> Thanks
<qbitor> I was wondering, because I found all the relevant files here. :-)
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<qbitor> _xvilka_: pinning worked.
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<qbitor> What does "migrate to the extension points" mean?
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<Fardale> qbitor: there is a another way to do syntax extension, the extension points ppx
<Fardale> And for what I know it is the new standard way to do this
<Leonidas> hmm, why does ocamlfind fail on 4.05 with a missing num package? I even installed num.0, but it still didn't pick it up :(
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<Leonidas> I feel like splitting out num was just pointless breakage, I've seen so many failures because of this
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<Leonidas> nuking the switch hand recreating as seemingly solved the problem :|
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<qbitor> Fardale: I tride to read a bit into it. As far as I understand it, I as a user can't do very much here. As long as the software relies on camlp4 I'm forced to use it, right?
<flux[m]> correct
<qbitor> This brings me back to my original question: How can I install lwt and camlp4?
<Leonidas> qbitor: opam install lwt camlp4?
<Leonidas> qbitor: oh I see. Have you tried recreating your switch?
<qbitor> Leonidas: No, how can I do this?
<qbitor> I tried a `opam switch reinstall system`. Not sure if this was what you meant. However installing lwt failed with the error above.
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<thizanne> qbitor: you shouldn't use the system switch in the first place
<thizanne> it's tempting but it's full of annoying bugs
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<Fardale> qbitor: you have to reinstall all the dependency after the pin of jbuilder
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<Leonidas> qbitor: in that case you should use opam switch create ./ 4.05.0
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<okeuday_bak> Leonidas: I agree, especially since a replacement wasn't provided within the default ocaml install, but that seems to indicate their intention was mainly for researchers, not for usage in dependable system development
<okeuday_bak> regarding num's removal
<okeuday_bak> normally a replacement for num would be present with a decent amount of time allowing a switchover
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<companion_cube> rgr[m]: still not convinced that Base.Sequence is superior, you know, it 's much more complicated
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<qbitor> Thanks to you all. I switched to 4.06.1 and recompiled and it worked.
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