ocaml - requiring "core" in utop gives error: Unix.Unix_error (Unix.ENOENT, "sysconf", "") -

-

when try call #require "core" in utop, error:

utop # #require "core";; exception: unix.unix_error (unix.enoent, "sysconf", ""). raised primitive operation @ unknown location called file "toplevel/topdirs.ml", line 144, characters 10-51

i have .ocamlinit file looks in current directory:

(* added opam. *) let () =   try topdirs.dir_directory (sys.getenv "ocaml_toplevel_path")   not_found -> () ;;  #use "topfind";; #thread;; #camlp4o;;

what causing error happen? appears error findlib?

i tried wiping away ~/.opam directory, rerunning opam init, opam switch set 4.05.0, , reinstalling core , utop, error persists. possible need reinstall opam itself? using binary version of opam-1.2.2.

i'm running arch linux, , believe error started occuring after updating packages on system, not sure.

i still able use jbuilder build executables, when running executables, fail similar error:

$ _build/install/default/bin/my_executable uncaught exception:    (unix.unix_error "illegal seek" sysconf "")  raised primitive operation @ unknown location

i pretty sure not exception being cause code, similar error occuring in utop.

i have jbuild file looks this:

(jbuild_version 1)  (executable  ((name main)   (libraries (my_library))))  (install  ((section bin)   (files ((main.exe my_executable)))))

edit: i've tried using different versions of opam , compiler, including system compiler (which version 4.05.0). nothing seems work. every combination produces same errors above.


Comments

Post a Comment

Popular posts from this blog

ZeroMQ on Windows, with Qt Creator -

-
i have installed zmq link given below on windows 7. http://zeromq.org/distro:microsoft-windows 1) have c++ project in qt-creator , i'm using zmq c++ binding (zhelpers.hpp etc). 2) have added .lib installed zmq folder qtcreator 3) while compiling, compiler looks _imp__zmq_verion, in .dll files present in .lib have __imp_zmq_version. 4) causing undefined reference zmq_version. anyone else faced problem , has solution ?
Read more

ios - MKAnnotationView layer is not of expected type: MKLayer -

-
Image
so code works fine logger riddled message. there way rid of or suppress it? postannotation.swift class postannotation: mkpointannotation { //mark: properties let post: post //mark: initialization init(post: post) { self.post = post super.init() self.coordinate = cllocationcoordinate2d(latitude: post.latitude, longitude: post.longitude) self.title = post.title self.subtitle = post.timestring() } } adding annotation let annotation = postannotation(post: post) self.map.addannotation(annotation) func mapview func mapview(_ mapview: mkmapview, viewfor annotation: mkannotation) -> mkannotationview? { if annotation mkuserlocation { return nil } var annotationview = mapview.dequeuereusableannotationview(withidentifier: "pin") as? mkpinannotationview if annotationview == nil { annotationview = mkpinannotationview(annotation: annotation, reuseidentifier: "pin") ...
Read more

python - Error while using APScheduler: 'NoneType' object has no attribute 'now' -

-
i have python app hosting on heroku. use apscheduler call function every day @ time. strange thing 1 time function runs after while have following error log: exception in thread apscheduler (most raised during interpreter shutdown): 2017-09-06t15:03:28.347848+00:00 app[web.1]: traceback (most recent call last): 2017-09-06t15:03:28.347858+00:00 app[web.1]: file "/app/.heroku/python/lib/python2.7/threading.py", line 810, in __bootstrap_inner 2017-09-06t15:03:28.347859+00:00 app[web.1]: file "/app/.heroku/python/lib/python2.7/threading.py", line 763, in run 2017-09-06t15:03:28.347861+00:00 app[web.1]: file "/app/.heroku/python/lib/python2.7/site-packages/apscheduler/schedulers/blocking.py", line 27, in _main_loop 2017-09-06t15:03:28.348167+00:00 app[web.1]: <type 'exceptions.attributeerror'>: 'nonetype' object has no attribute 'now' any guesses? the full code long here key parts: def startdayauto(): global ...
Read more