Question

我在设置我的OCaml环境时遇到了一些问题，并且正在关注此页：

https://github.com/realworldocaml/book/wiki/Installation-Instructions

但是，我遇到了一些我无法解决的问题。我在macOS 10.12.5上使用zsh。

Brew安装opam，没有错误或警告。我相信我的问题是环境变量（??）不同步。当我运行一些建议的命令时，这是一些输出：

opam开关：

--     -- 4.04.2  Official 4.04.2 release
--     -- 4.05.0  Official 4.05.0 release
system  C system  System compiler (4.05.0)
# 251 more patched or experimental compilers, use '--all' to show

[WARNING] The environment is not in sync with the current switch.
          You should run: eval `opam config env`

eval＆＃39; opam config env＆＃39;：

CAML_LD_LIBRARY_PATH="/Users/Alex/.opam/system/lib/stublibs:/usr/local/lib/ocaml/stublibs"; export CAML_LD_LIBRARY_PATH;
OPAMUTF8MSGS="1"; export OPAMUTF8MSGS;
MANPATH="/Users/Alex/.opam/system/man:"; export MANPATH;
PERL5LIB="/Users/Alex/.opam/system/lib/perl5"; export PERL5LIB;
OCAML_TOPLEVEL_PATH="/Users/Alex/.opam/system/lib/toplevel"; export OCAML_TOPLEVEL_PATH;
PATH="/Users/Alex/.opam/system/bin:/usr/local/opt/opencv3/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/X11/bin:/usr/local/MacGPG2/bin:/Library/Frameworks/Mono.framework/Versions/Current/Commands:/Applications/Wireshark.app/Contents/MacOS"; export PATH;

opam安装基础：

The following actions will be performed:
  ∗  install sexplib v0.9.2                   [required by base]
  ∗  install base    v0.9.3
===== ∗  2 =====
Do you want to continue ? [Y/n] y

=-=- Gathering sources =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[base] Archive in cache
[sexplib] Archive in cache

=-=- Processing actions -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[ERROR] The compilation of sexplib failed at "jbuilder build -p sexplib -j 4".

#=== ERROR while installing sexplib.v0.9.2 ====================================#
# opam-version 1.2.2
# os           darwin
# command      jbuilder build -p sexplib -j 4
# path         /Users/Alex/.opam/system/build/sexplib.v0.9.2
# compiler     system (4.05.0)
# exit-code    127
# env-file     /Users/Alex/.opam/system/build/sexplib.v0.9.2/sexplib-35995-e7966f.env
# stdout-file  /Users/Alex/.opam/system/build/sexplib.v0.9.2/sexplib-35995-e7966f.out
# stderr-file  /Users/Alex/.opam/system/build/sexplib.v0.9.2/sexplib-35995-e7966f.err



=-=- Error report -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
The following actions were aborted
  ∗  install base v0.9.3
The following actions failed
  ∗  install sexplib v0.9.2
No changes have been performed

对于问题的目的，我正在尝试安装基地，但最终会想要安装核心，utop，绿洲等......非常感谢任何帮助！

编辑：当我应该使用反引号（`）时，我正在使用撇号（＆＃39;）。我认为没有经验的shell用户的证据......

Answer 1

你应该使用反引号（在许多键盘的键1的左侧找到）

eval `opam config env`

如果您在查找反引号时遇到问题，则可以使用其他shell语法

eval $(opam config env)

注意：此命令不应该打印任何内容，您看到环境变量的值表明您正在调用它（这个变量应该由shell看到）。

OPAM和OCaml安装

1 个答案: