高Sierra 10.13.1和Rails的问题？

问题描述：

我已经尝试在高塞拉利昂安装Rails，但不断收到“无法构建gem本机扩展”错误。高Sierra 10.13.1和Rails的问题？

checking for sys/epoll.h... no

^这是我需要做什么来看着。我不确定这是否是新操作系统的问题...可能是nio4r-2.1.0的问题？

Building native extensions. This could take a while... 
 
ERROR: Error installing rails: 
 
\t ERROR: Failed to build gem native extension. 
 

 
    current directory: /Users/paulkim/.rvm/gems/ruby-2.4.2/gems/nio4r-2.1.0/ext/nio4r 
 
/Users/paulkim/.rvm/rubies/ruby-2.4.2/bin/ruby -r ./siteconf20171203-22631-czj48g.rb extconf.rb 
 
checking for unistd.h... yes 
 
checking for sys/select.h... yes 
 
checking for poll.h... yes 
 
checking for sys/epoll.h... no 
 
checking for sys/event.h... yes 
 
checking for sys/queue.h... yes 
 
checking for port.h... yes 
 
checking for sys/resource.h... yes 
 
creating Makefile 
 

 
current directory: /Users/paulkim/.rvm/gems/ruby-2.4.2/gems/nio4r-2.1.0/ext/nio4r 
 
make "DESTDIR=" clean 
 

 
current directory: /Users/paulkim/.rvm/gems/ruby-2.4.2/gems/nio4r-2.1.0/ext/nio4r 
 
make "DESTDIR=" 
 
compiling bytebuffer.c 
 
compiling monitor.c 
 
compiling nio4r_ext.c 
 
In file included from nio4r_ext.c:7: 
 
./../libev/ev.c:488:48: warning: '/*' within block comment [-Wcomment] 
 
/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */ 
 
              ^
 
./../libev/ev.c:1068:26: warning: implicit conversion loses integer precision: 'uint64_t' (aka 'unsigned long long') to 'unsigned int' [-Wshorten-64-to-32] 
 
    return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);

这只是显示一些警告 - 没有什么应该是致命的。关于sys/epoll.h的行只是信息性的（它检查哪些功能可用，maoll上不存在epoll） –

是否安装了Xcode及其开发人员命令行工具？您是否至少打开了一次Xcode并接受了许可证？ – spickermann

https://stackoverflow.com/questions/8389301/os-x-rails-failed-to-build-gem-native-extension#12229945和https://stackoverflow.com/questions/9552292/failed-to-build -gem-native-extension –

答

正是有了高塞拉利昂和xCode.I一个问题，第一重新格式化我的机器埃尔卡皮坦，也没有安装Rails的问题。然后在另一台机器与高山我也有问题与Rails。

更新到xCode 9.2后，我成功安装了Rails 5.1.4。

谢谢大家。

高Sierra 10.13.1和Rails的问题？

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