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我尝试安装宝石' sinatra-websocket ',但是当我跑步时gem install sinatra-websocket,我收到了这个错误......

ERROR: Failed to build gem native extension

... 随着 ...

C:/Ruby193/bin/ruby.exe 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=C:/Ruby193/bin/ruby
    --with-thin_parser-dir
    --without-thin_parser-dir
    --with-thin_parser-include
    --without-thin_parser-include=${thin_parser-dir}/include
    --with-thin_parser-lib
    --without-thin_parser-lib=${thin_parser-dir}/lib
    --with-clib
    --without-clib
C:/Ruby193/lib/ruby/1.9.1/mkmf.rb:381:in `try_do': The …

我正在尝试安装fastlane.我安装了Xcode.我fastlane使用命令安装sudo gem install fastlane.我现在进入我的项目文件夹并键入fastlane init并获取错误:

-bash:fastlane:找不到命令.

我看到它fastlane已安装并可在此处查看

/Users/username/.gem/ruby/2.0.0/gems/fastlane-1.70.0/bin

在我的Mac上.

我尝试将此添加到我的PATH,但我仍然得到相同的错误.我的道路是

/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:./Users/username/.gem/ruby/2.0.0/gems/

我在这里错过了什么？