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Activity
    Louis Gesbert
    @AltGr
    ```ocaml
    ```ocaml
    let rec test x =
      test x
    Pavel Argentov
    @argent-smith
    anyone alive?
    i can’t install a thing in opam (on Sierra)
    ➜  ocaml-tutorial opam install utop
    The following actions will be performed:
      ∗  install cppo 1.1.2                       [required by utop]
      ∗  install utop 1.17
    ===== ∗  2 =====
    Do you want to continue ? [Y/n] Y
    
    =-=- Gathering sources =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=  🐫
    [cppo] Archive in cache
    [utop] Archive in cache
    
    =-=- Processing actions -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=  🐫
    [ERROR] The compilation of cppo failed at "make".
    Processing  1/2: [cppo: ocamlfind remove]
    #=== ERROR while installing cppo.1.1.2 ========================================#
    # opam-version 1.2.2
    # os           darwin
    # command      make
    # path         /Users/paul/.opam/system/build/cppo.1.1.2
    # compiler     system (4.03.0)
    # exit-code    2
    # env-file     /Users/paul/.opam/system/build/cppo.1.1.2/cppo-20245-e7966f.env
    # stdout-file  /Users/paul/.opam/system/build/cppo.1.1.2/cppo-20245-e7966f.out
    # stderr-file  /Users/paul/.opam/system/build/cppo.1.1.2/cppo-20245-e7966f.err
    ### stdout ###
    # [...]
    # ocamlyacc cppo_parser.mly
    # ocamllex cppo_lexer.mll
    # 368 states, 13139 transitions, table size 54764 bytes
    # 3729 additional bytes used for bindings
    # ocamlopt -o cppo -dtypes unix.cmxa str.cmxa cppo_version.ml cppo_types.ml cppo_parser.mli cppo_parser.ml cppo_lexer.ml cppo_command.ml cppo_eval.ml cppo_main.ml
    # cd ocamlbuild_plugin && ocamlbuild -use-ocamlfind ocamlbuild_cppo.cma ocamlbuild_cppo.cmxa ocamlbuild_cppo.a ocamlbuild_cppo.cmxs
    # ocamlfind ocamldep -package ocamlbuild -modules ocamlbuild_cppo.mli > ocamlbuild_cppo.mli.depends
    # + ocamlfind ocamldep -package ocamlbuild -modules ocamlbuild_cppo.mli > ocamlbuild_cppo.mli.depends
    # ocamlfind: Package `ocamlbuild' not found
    # Command exited with code 2.
    ### stderr ###
    # make: *** [ocamlbuild] Error 10
    
    
    
    =-=- Error report -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=  🐫
    The following actions were aborted
      ∗  install utop 1.17
    The following actions failed
      ∗  install cppo 1.1.2
    No changes have been performed
    any ideas?
    Pavel Argentov
    @argent-smith
    Solved this by running opam update && opam upgrade. Being installed with brew opan doesn’t have the up-to-date packages db out of the box.
    Sylvain Le Gall
    @gildor478
    Is this channel an official channel to discuss OPAM ?
    Pavel Argentov
    @argent-smith
    Gitter search didn’t give me an alternative ;)
    Sylvain Le Gall
    @gildor478
    I suppose the mailing list is a better way to get answer
    Pavel Argentov
    @argent-smith
    hi ppl. is there a way to do opam install of a specific github version of, say, core_kernel?
    Pavel Argentov
    @argent-smith
    found it (opam pin add), nevermind )
    Kiti-nomad
    @kiti-nomad
    hi
    i have a trouble
    I installed camlzip, but when I make opa, I always have no hints.
    Matthieu Sozeau
    @mattam82
    Is there any resource describing how to make a single package with different build/sources depending on another package? In my example I have a Coq package which works with Coq 8.8 or 8.9 with different sources for the two versions.
    Maybe it should just work out-of-the-box using conditionals, but I wanted to check if this was an accepted usage
    Also, up-to now I was using +8.8 or +8.9 versions, but it seems the package manager should be able to handle this variability
    Matthieu Sozeau
    @mattam82
    Given that the url field only takes a string not depending on a filter, I guess it's not possible
    simplyblago
    @simplyblago

    (very new to ocaml, but pretty frustrated) Hey guys, I'm trying to run a simple ocaml file through docker. I'm super confused why this is seemingly so complicated. I've tried

    FROM ocaml/opam2:latest
    
    RUN opam depext -i core ssl tls cohttp-lwt cohttp-lwt-unix
    
    COPY test_smoke.ml ./
    
    RUN ocamlc -o test_smoke test_smoke.ml && ./test_smoke

    but there is no ocamlc in the image? This was surprising to me. What' would be the equivalent of e.g.

    FROM rust:latest
    COPY . .
    RUN cargo run

    for rust

    Kiti-nomad
    @kiti-nomad
    I want to ask you a question, are JIT and AOT the characteristics of the VM language? I never encountered such a concept when I was learning C ++ and D
    Kiti-nomad
    @kiti-nomad
    Someone told me that the jvm language takes AOT when compiled into bytecode, and JIT when run in a virtual machine. Languages ​​like cpp directly generate executables, so it takes AOT
    is it right!
    Although this has nothing to do with the subject you discussed, I know you are all professionals
    ret394
    @ret394
    OCaml for Windows
    intended to be used from within cygwin

    remove cygwin dep.

    ret394
    @ret394
    msys2 could help here.

    really sorry. native(no msys2 req) would be better than msys2.