Just beginning with ocaml and am struggling with the various compilers and tooling. E.g. ocamlopt
, ocamlc
, ocamlbuild
, corebuild
and so on. So, how do I compile the following?
open Core.Std
module Regex = Re2.Regex
let ls pattern =
let pat = Regex.create_exn pattern in
let matcher = Regex.matches pat in
Sys.ls_dir "."
|> List.filter ~f:matcher
|> List.iter ~f:(fun s -> print_string s; print_newline ())
let () =
match In_channel.input_line stdin with
| None -> print_string "No Input"
| Some pat -> ls pat
In utop
I can just #require "re2"
and go from there.
Without the inclusion of the regular expressions module I would just use corebuild ls.native
, assuming that the above code is placed into ls.ml
.
[edit]
Have so far tried
ocamlbuild -use-ocamlfind -package core -package re2
which spit out
ocamlfind ocamldep -package core -package re2 -modules ls.ml > ls.ml.depends
ocamlfind ocamlc -c -package core -package re2 -o ls.cmo ls.ml
+ ocamlfind ocamlc -c -package core -package re2 -o ls.cmo ls.ml
ocamlfind: Error from package `threads': Missing -thread or -vmthread switch
Command exited with code 2.
So after some googling I was led to this blog I tried
ocamlbuild -tag thread -use-ocamlfind -package core -package re2
which spits out over 6000 lines of what looks like make
output before failing with:
collect2: error: ld returned 1 exit status
File "caml_startup", line 1:
Error: Error during linking
Command exited with code 2.
so I'm not sure what to try next.
I am using Ubuntu 14.04 on a 64bit machine. I ditched the apt-get versions of ocaml:
sudo apt-get remove --purge ocaml ocaml-base-nox ocaml-compiler-libs \
ocaml-interp ocaml-native-compilers \
ocaml-nox campl4 ocaml-base ocaml-docs opam
Then I installed opam from source according to the instructions here.
Next I installed core, utop, and re2 with opam install core utop re2
And finally I ran ocamlbuild -use-ocamlfind -package re2 -package core -tag thread ls.native
which built the desired executable.
本文收集自互联网,转载请注明来源。
如有侵权,请联系[email protected] 删除。
我来说两句