未定义函数：wx_object.start / 3 [英] undefined function :wx_object.start/3

问题描述

我尝试在Mac 64位Capitan Mac上安装ErLang，但尝试通过brew安装它，但是当我尝试运行：observer.start时，出现此错误：

  **（UndefinedFunctionError）未定义函数：wx_object.start / 3（模块：wx_object不可用）
：wx_object.start（：observer_wx，[] ，[]）
rator_wx.erl：72：：observer_wx.start / 0 
  

I也尝试使用erlang解决方案安装erLang otp 18.3，但我遇到了同样的错误。

任何想法吗？

编辑

如果我尝试直接从Erlang Shell启动观察器：

  ^ CiMac：〜Apple $ erl 
 Erlang / OTP 18 [erts-7.3] [source] [64位] [smp：4：4] [async-threads ：10] [hipe] [kernel-poll：false] 
 
 Eshell V7.3（用^ G中止）
 1>观察者：start（）。 
 **异常错误：未定义函数wx_object：start / 3 
在函数observer_wx：start / 0中（observer_wx.erl，第72行）
  

EDIT2

  iMac：〜Apple $ brew info erlang 
 erlang：稳定的18.3（瓶装），HEAD 
高度可扩展的实时系统的编程语言
 https://www.erlang.org/ 
 / usr /local/Cellar/erlang/18.3（7,489 file，273.8M）
 2016年13月13日从12:24:59 
从瓶子倒出从：https://github.com/Homebrew/ homebrew-core / blob / master / Formula / erlang.rb 
 ==>依赖项
构建：autoconf✔，automake✔，libtool✔
必需：openssl✔
推荐：wxmac✔
可选：fop✘
 ==>选项
 --with-dirty-schedulers 
启用实验性脏调度程序
 --with-fop 
带有fop支持的构建
 --with-native-libs 
启用本机库编译
 --without-docs 
不要安装文档
 --without-hipe 
禁用构建环境；在各种OS X系统上失败
-不带wxmac 
不支持wxmac的构建
 --HEAD 
安装HEAD版本
 ==>注意事项
手册页位于：
 / usr / local / opt / erlang / lib / erlang / man 
 
用`erl -man`访问或添加目录到MANPATH。 
 iMac：〜Apple $ erl 
 / opt / local / bin / erl 
  

err at brew info是：
/usr/local/Cellar/erlang/18.3
但是，哪个erl是：
/ opt / local / bin / erl
到 / opt / local / lib / erlang / bin / erl

如果我开始 /usr/local/Cellar/erlang/18.3/bin/erl 观察器将起作用！

所以，我用鼠标删除了别名，然后输入：

  sudo ln -s /usr/local/Cellar/erlang/18.3/lib/erlang/bin/erl / opt / local / bin / erl 
  

但是我不确定 / opt / local / lib / erlang / bin / erl 它是如何创建的..

解决方案

给出看起来像您在使用Elixir的语法：-）

无论如何，一个可能的答案是，您需要使用WxWidgets构建的Erlang，这是观察者使用的GUI工具包。

如果我查看Erlang的自制程序公式（ http://brewformulas.org/Erlang ），它表明了它将安装 Wxmac依赖项，因此它应该引入WxWidgets ...

如果尝试按如下所示直接从Erlang Shell启动观察器，会发生什么？ / p>

1>观察者：start（）。

（我已经在MacPorts上安装了它，并且可以直接使用）。

编辑

Erlang看起来确实没有WxWidgets。您可以尝试使用 brew info erlang ，它将显示您安装了哪个版本，以及是否安装了 wxmac 依赖项。

您确定实际上是在启动正确的erl吗？一个由brew安装？ （控制台中的 which erl 打印预期路径吗？）

I have tried to install ErLang on my Mac 64bit, Capitan, I've tried to install it via brew, but when I try to run :observer.start I get this error:

** (UndefinedFunctionError) undefined function :wx_object.start/3 (module :wx_object is not available)
    :wx_object.start(:observer_wx, [], [])
    observer_wx.erl:72: :observer_wx.start/0

I also tried to install erLang otp 18.3 using erlang solutions, but I got the same error.

Any idea?

EDIT

If I try to start the observer directly from the Erlang shell:

^CiMac:~ Apple$ erl 
Erlang/OTP 18 [erts-7.3] [source] [64-bit] [smp:4:4] [async-threads:10] [hipe] [kernel-poll:false]

Eshell V7.3  (abort with ^G)
1> observer:start().
** exception error: undefined function wx_object:start/3
     in function  observer_wx:start/0 (observer_wx.erl, line 72)

EDIT2

iMac:~ Apple$ brew info erlang
erlang: stable 18.3 (bottled), HEAD
Programming language for highly scalable real-time systems
https://www.erlang.org/
/usr/local/Cellar/erlang/18.3 (7,489 files, 273.8M)
  Poured from bottle on 2016-05-13 at 12:24:59
From: https://github.com/Homebrew/homebrew-core/blob/master/Formula/erlang.rb
==> Dependencies
Build: autoconf ✔, automake ✔, libtool ✔
Required: openssl ✔
Recommended: wxmac ✔
Optional: fop ✘
==> Options
--with-dirty-schedulers
    Enable experimental dirty schedulers
--with-fop
    Build with fop support
--with-native-libs
    Enable native library compilation
--without-docs
    Do not install documentation
--without-hipe
    Disable building hipe; fails on various OS X systems
--without-wxmac
    Build without wxmac support
--HEAD
    Install HEAD version
==> Caveats
Man pages can be found in:
  /usr/local/opt/erlang/lib/erlang/man

Access them with `erl -man`, or add this directory to MANPATH.
iMac:~ Apple$ which erl
/opt/local/bin/erl

erl at brew info is: /usr/local/Cellar/erlang/18.3 but, which erl is: /opt/local/bin/erl which points to /opt/local/lib/erlang/bin/erl

if I started /usr/local/Cellar/erlang/18.3/bin/erl observer will work!

so, I deleted the alias by mouse and I:

sudo ln -s /usr/local/Cellar/erlang/18.3/lib/erlang/bin/erl /opt/local/bin/erl

but I am not sure about /opt/local/lib/erlang/bin/erl how it was created.. any way, it works now..

解决方案

Given the syntax it looks like you are using Elixir :-)

Anyway, one possible answer is that you need Erlang built with WxWidgets, which is the GUI toolkit used by the observer.

If I look at the homebrew formula for Erlang (http://brewformulas.org/Erlang), it shows that it will install the "Wxmac" dependency, so it should bring in WxWidgets...

What happens if you try to start the observer directly from the Erlang shell as follows?

1> observer:start().

(I have installed it with MacPorts and it works out of the box).

EDIT

It really looks like that Erlang doesn't have WxWidgets. You can try brew info erlang, it will show you which version is installed and wether the wxmac dependency is installed or not.

Are you sure actually you are starting the right erl? The one installed by brew? (does "which erl" in the console print the expected path?)

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