ruby - Gem::Ext::BuildError:错误:无法构建 gem native 扩展。架构Linux

Question

我想在我的笔记本电脑上本地运行 jekyll。我按照 Github 的指南去做了，https://help.github.com/articles/using-jekyll-with-pages不幸的是，我在输入时卡住了 $捆绑安装我收到以下错误:

Fetching gem metadata from https://rubygems.org/.........Failed to load /etc/gemrc due to permissions problem.
Resolving dependencies...

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

/usr/bin/ruby extconf.rb 
checking for main() in -lc... *** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers.  Check the mkmf.log file for more details.  You may
need configuration options.

Provided configuration options:
--with-opt-dir
--without-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib
--without-opt-lib=${opt-dir}/lib
--with-make-prog
--without-make-prog
--srcdir=.
--curdir
--ruby=/usr/bin/ruby
--with-redcloth_scan-dir
--without-redcloth_scan-dir
--with-redcloth_scan-include
--without-redcloth_scan-include=${redcloth_scan-dir}/include
--with-redcloth_scan-lib
--without-redcloth_scan-lib=${redcloth_scan-dir}/lib
--with-clib
--without-clib
 /usr/lib/ruby/2.1.0/mkmf.rb:456:in `try_do': The compiler failed to generate an         executable file. (RuntimeError)
You have to install development tools first.
from /usr/lib/ruby/2.1.0/mkmf.rb:541:in `try_link0'
from /usr/lib/ruby/2.1.0/mkmf.rb:556:in `try_link'
from /usr/lib/ruby/2.1.0/mkmf.rb:742:in `try_func'
from /usr/lib/ruby/2.1.0/mkmf.rb:973:in `block in have_library'
from /usr/lib/ruby/2.1.0/mkmf.rb:918:in `block in checking_for'
from /usr/lib/ruby/2.1.0/mkmf.rb:351:in `block (2 levels) in postpone'
from /usr/lib/ruby/2.1.0/mkmf.rb:321:in `open'
from /usr/lib/ruby/2.1.0/mkmf.rb:351:in `block in postpone'
from /usr/lib/ruby/2.1.0/mkmf.rb:321:in `open'
from /usr/lib/ruby/2.1.0/mkmf.rb:347:in `postpone'
from /usr/lib/ruby/2.1.0/mkmf.rb:917:in `checking_for'
from /usr/lib/ruby/2.1.0/mkmf.rb:968:in `have_library'
from extconf.rb:5:in `<main>'

extconf failed, exit code 1

Gem files will remain installed in /tmp/bundler20140903-2231-pkzqqj/RedCloth-4.2.9/gems /RedCloth-4.2.9 for inspection.
Results logged to /tmp/bundler20140903-2231-pkzqqj/RedCloth-4.2.9/extensions/x86_64-linux/2.1.0/RedCloth-4.2.9/gem_make.out
An error occurred while installing RedCloth (4.2.9), and Bundler cannot
continue.
Make sure that `gem install RedCloth -v '4.2.9'` succeeds before bundling.

我多次尝试安装 ruby​​，但它没有解决我的问题。你有什么提示吗？

Answer 1

我在 MacOS 上遇到了这个问题，并通过同意 Xcode 许可得到了解决。我最近更新了 Xcode，结果发现我需要重新同意许可才能成功使用命令行工具。

只需运行:

xcodebuild -license