错误:无法构建创业板本机扩展(stock_quote gem)

Question

当我试图将stock_quote gem添加到我的gem文件时，我遇到了一个奇怪的错误。

错误是：

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

current directory:
/home/cabox/.rbenv/versions/2.4.2/lib/ruby/gems/2.4.0/gems/unf_ext-0.0.7.5/ext/unf_ext
/home/cabox/.rbenv/versions/2.4.2/bin/ruby -r ./siteconf20180611-2823-17z0ly6.rb extconf.rb
checking for -lstdc++... no
creating Makefile

current directory:
/home/cabox/.rbenv/versions/2.4.2/lib/ruby/gems/2.4.0/gems/unf_ext-0.0.7.5/ext/unf_ext
make "DESTDIR=" clean

current directory:
/home/cabox/.rbenv/versions/2.4.2/lib/ruby/gems/2.4.0/gems/unf_ext-0.0.7.5/ext/unf_ext
make "DESTDIR="
compiling unf.cc
make: g++: Command not found
make: *** [unf.o] Error 127

make failed, exit code 2

Gem files will remain installed in
/home/cabox/.rbenv/versions/2.4.2/lib/ruby/gems/2.4.0/gems/unf_ext-0.0.7.5 for inspection.
Results logged to
/home/cabox/.rbenv/versions/2.4.2/lib/ruby/gems/2.4.0/extensions/x86_64-linux/2.4.0-static/unf_ext-0.0.7.5/gem_make.out

An error occurred while installing unf_ext (0.0.7.5), and Bundler cannot continue.
Make sure that `gem install unf_ext -v '0.0.7.5'` succeeds before bundling.

In Gemfile:
  stock_quote was resolved to 2.0.0, which depends on
    rest-client was resolved to 2.0.2, which depends on
      http-cookie was resolved to 1.0.3, which depends on
        domain_name was resolved to 0.5.20180417, which depends on
          unf was resolved to 0.1.4, which depends on
            unf_ext

看到这一点后，我尝试自己安装gem install unf_ext -v '0.0.7.5，但也收到了类似的错误。

我发现了一个类似的错误，但是我无法通过遵循这些错误来解决它。

也许问题是我使用的是一个CodeAnywhere消防软管箱

除此之外，我不太确定它会是什么。如果你想看我的回购，请告诉我，或如果需要更多的信息，请告诉我。

Answer 1

您的系统上没有安装C++编译器。如果您使用的是Ubuntu，请运行以下命令：

sudo apt-get install build-essential

通常，我会安装其他几个软件包，这些软件包在软件开发过程中可能会有所帮助。

curl -sL https://deb.nodesource.com/setup_8.x | sudo -E bash -
curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list

sudo apt-get update
sudo apt-get install git-core curl zlib1g-dev build-essential libssl-dev libreadline-dev libyaml-dev libsqlite3-dev sqlite3 libxml2-dev libxslt1-dev libcurl4-openssl-dev software-properties-common libffi-dev nodejs yarn