问题描述
这个是我在SO上的提问，可以去看一下。
过程：
sudo gem install eventmachine...Building native extensions. This could take a while.../Users/kuankuan/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/rubygems/ext/builder.rb:48: warning: Insecure world writable dir /usr/local/bin/g4bin in PATH, mode 040777ERROR: Error installing eventmachine: ERROR: Failed to build gem native extension./Users/kuankuan/.rvm/rubies/ruby-1.9.3-p327/bin/ruby extconf.rb/Users/kuankuan/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:1344: warning: Insecure world writable dir /usr/local/bin/g4bin in PATH, mode 040777checking for rb_trap_immediate in ruby.h,rubysig.h... nochecking for rb_thread_blocking_region()... yeschecking for inotify_init() in sys/inotify.h... nochecking for __NR_inotify_init in sys/syscall.h... nochecking for writev() in sys/uio.h... yeschecking for rb_thread_check_ints()... yeschecking for rb_time_new()... yeschecking for sys/event.h... yeschecking for sys/queue.h... yescreating Makefilemakecompiling binder.cppcc1plus: error: unrecognized command line option '-arch'make: *** [binder.o] Error 1
ruby版本：1.9.3Mac OSX 10.8.3
问题解答
回答1：汗，我和你同样的机器同样的配置一条命令就1秒钟就装好了。这个好难回答。你的xcode版本多少，commandline升级了没？一般mac下ruby环境出错会和这个有关。。
