adrien changed the topic of #ocaml to: Discussions about the OCaml programming language | http://www.ocaml.org | OCaml 4.02.2 announced http://ocaml.org/releases/4.02.html | Try OCaml in your browser: http://try.ocamlpro.com | Public channel logs at http://irclog.whitequark.org/ocaml
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<Algebr> I want to get the client IP address for someone that connected to my cohttp server. Where can I find this information? I tried Cohttp.Connection.to_string and via Conduit's TCP flow record, but that gave me the server's ip.
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<AltGr> Algebr: I'd like that answer too
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<Drup> mfp: you should really work on the cohttp branch :/
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<flux> altgr, well, algebr is gone, but you could try searching for calls to getsockname and find out where (if) the informations ends up at..
<flux> failing that, get the socket descriptor directly (I don't know how) and use getsockname on it
<AltGr> Thanks; don't really need it now, it's just that I remembered hitting the same issue when trying to print debug logs a while ago. Since it was just for debug I didn't dig too far :)
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<AltGr> yes... there are already open issues on the opam list interface, which needs a refactoring
<AltGr> with proper handling of filters and their combination
<Drup> ok, do you want me to touch it or do you have a bigger plan already at work ? :]
<Drup> (a combinator interface for the filters would probably be nice, though)
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<AltGr> not much more than what's here: https://github.com/ocaml/opam/issues/2124
<AltGr> If you feel like it, any improvement in that direction is very welcome :)
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<Drup> but that's about the cmdliner interface, I just want more things in the OCaml API
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<mfp> Drup: will get to it... the plan was to get the latest and greatest release in the 2.x series out the door (because who knows when 3.0 will be out) and serve as a baseline for cohttp(_rebased) performance
<Drup> ok, fair enough
<Drup> I'm just afraid you are doing work that is not useful for the next version
<mfp> Drup: so far, I see the following slowdows vs stock 2.6 (before this weekend's work) -> 404 50% trivial page (~ 40 byte) 25%
<mfp> *slowdowns
<Drup> mfp: well, there are several perf bugs in cohttp too, but you'll have to see that with them :)
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<mfp> for files -> 1KB -25% 7KB -15% 15KB -6% 16KB -6%
<mfp> higher slowdowns for smaller responses => high connection overhead, and probably large buffer allocation (as addressed in my latest PRs)
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<ivali> Hello, any way to write inline assembly with ocaml (to call cpu instructions like clz/ctz) ?
<Leonidas> ivali: you could do that from a C module?
<ivali> oh, yes.
<ivali> ty
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<domsj> Hi, any ctypes specialists in the room?
<dsheets> better to just ask your question
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<domsj> Ok. I can bind to functions in other libraries, but not to a c function defined in a .c 'stubs' file which is directly compiled into the same executable ... is that expected?
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<domsj> I get this error: Fatal error: exception Dl.DL_error("/home/jan/dev/alba/alba: undefined symbol: _crc32c_generic")
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<domsj> when using objdump -d on the executable I can see the symbol being there though
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<dsheets> domsj, either use stub generation and then you don't require dynamic linking
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<dsheets> or... (there is another way, one moment I need to find the flag)
<dsheets> domsj, pass -E to the linker
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<ivali> i am a newbie. i am trying to implement the ctz (count trailing zeroes function). program fails at line 6 with syntax error http://pastebin.com/LbhAPcEQ
<ivali> can anyone point me the bug?
<MasseR> ivali: you forgot 'in'
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<flux> ivali, the let-syntax for top-level definitons is: let a = expr and the let-in-syntax for expressions is: let a = expr1 in expr2
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<ivali> got it, thanks!
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<Algebr> assert is actually being executed at run time right? Just like the when guard?
<smondet> Algebr: yes, you can also disable all the assert calls with a compiler flag
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<m4b> i'm having trouble with opam dependencies, and i can't seem to get opam to install this: http://github.com/m4b/elf2json; it fails with unbound Jsonm module (yes it's installed); i've tried everything i could think of, and i'm not sure what's wrong, any help would be much appreciated.
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<Drup> m4b: the rdr package is broken, it doesn't install anything
<m4b> @drup: yes, sorry; the elf2json will depend on the latest version (2.0.1) i just pushed, and which is awaiting approval; but the error I get is that Jsonm is not found.
<m4b> i've tested on my local machine where rdr is pinned and has all the proper libs installed
<m4b> furthermore: if i do `ocaml setup.ml -build && ocaml setup.ml -install` it installs fine (modulo permission errors).
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<Drup> can you push a decent opam file to your repo so that I can pin ?
<Drup> ah, you have one in a subrepo
<m4b> Drup: for rdr or elf2json
<Drup> subdir*
<m4b> ya; i was experimenting with oasis2opam because i thought it'd save me
<Drup> ok, it builds for me now.
<m4b> ... what did you do?
<m4b> even when totally gut the rdr deps, i still get a Jsonm unbound module error;
<Drup> hum, It builds by itself but not in opam
<m4b> yea, exactly; it's totally crazy
<m4b> i'm not an opam foo master tho so i probably did something stupid on my part
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<Drup> I can reproduce locally with "./configure --prefix `opam config var prefix"
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<Drup> +`
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<Drup> it looks like an interesting oasis bug, but I don't understand why you are hiting it
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<m4b> Drup: so the local reproduction steps is for elf2json, yes? I don't understand either, since the opam file is extremely simple. If you remove the rdr deps from the project, and just call Jsonm or B64 (base64), I still get the unbound module error
<Drup> yes
<Drup> it's not opam related
<Drup> it's oasis
<Drup> you can trigger it by giving a --prefix option to the configure
<m4b> ok, one sec, let me try on a different machine
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<Drup> wait, wait
<Drup> why myocamlbuild.ml is not in the repository ?
<m4b> ..
<Drup> you are using the static setup, you must include it
<Drup> and the META file too
<m4b> i pushed the myocamlbuild.ml file; the META should already be in /lib; i've messed with this repo trying to figure out stuff i could have busted the oasis so i need to tinker for a bit, but i think you may have figured it out;
<m4b> i also hearted you in the commit :P
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<Algebr> There is no way to use multiple opam switches at the same time, correct?
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<smondet> Algebr: I think to some extent with the `--switch`
<smondet> option
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<Drup> Algebr: sure you can
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<Drup> just use do: eval `opam config env --switch FOO` and it will switch locally in the terminal
<Drup> You can then use different switches in different terminals
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<Algebr> excellent, I didn't know about that, that's what I want, different switches in different termainsl
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