基本Ocaml:我该如何编译? [英] Basic Ocaml: How do I compile this?
问题描述
仅从ocaml开始,就在各种编译器和工具方面苦苦挣扎.例如. ocamlopt
,ocamlc
,ocamlbuild
,corebuild
等.那么,我该如何编译以下内容?
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
在utop
中,我可以#require "re2"
然后从那里去.
In utop
I can just #require "re2"
and go from there.
在不包含正则表达式模块的情况下,我将仅使用corebuild ls.native
,假设上面的代码已放置在ls.ml
中.
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
.
到目前为止已经尝试过
ocamlbuild -use-ocamlfind -package core -package re2
吐出来的
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.
因此,经过一番谷歌搜索后,我被带到了此博客我尝试过
So after some googling I was led to this blog I tried
ocamlbuild -tag thread -use-ocamlfind -package core -package re2
会在失败之前吐出6000行以上的make
输出:
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.
所以我不确定下一步该怎么做.
so I'm not sure what to try next.
推荐答案
我正在64位计算机上使用Ubuntu 14.04.我放弃了ocaml的apt-get版本:
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
然后我按照此处的说明从源代码安装了opam.
Then I installed opam from source according to the instructions here.
接下来,我用opam install core utop re2
最后我跑了ocamlbuild -use-ocamlfind -package re2 -package core -tag thread ls.native
构建了所需的可执行文件.
which built the desired executable.
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