https://ruby-china.org/seraphim_houwei en-us <p>Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.</p> <p>/Users/fun-mac01/.rvm/rubies/ruby-1.8.7-p374/bin/ruby extconf.rb checking for rb_trap_immediate in ruby.h,rubysig.h... yes checking for rb_thread_blocking_region()... no checking for inotify_init() in sys/inotify.h... no checking for __NR_inotify_init in sys/syscall.h... no checking for writev() in sys/uio.h... yes checking for rb_wait_for_single_fd()... no checking for rb_enable_interrupt()... no checking for rb_time_new()... yes checking for sys/event.h... yes checking for sys/queue.h... yes creating Makefile</p> <p>make c++ -I. -I. -I/Users/fun-mac01/.rvm/rubies/ruby-1.8.7-p374/lib/ruby/1.8/i686-darwin14.0.0 -I. -DWITH_SSL -DBUILD_FOR_RUBY -DHAVE_RB_TRAP_IMMEDIATE -DHAVE_RBTRAP -DHAVE_WRITEV -DHAVE_WRITEV -DHAVE_RB_TIME_NEW -DOS_UNIX -DHAVE_SYS_EVENT_H -DHAVE_SYS_QUEUE_H -DHAVE_KQUEUE -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -fno-common -I/usr/local/opt/libyaml/include -I/usr/local/opt/readline/include -I/usr/local/opt/libksba/include -I/usr/local/opt/openssl098/include -O2 -fno-tree-dce -fno-optimize-sibling-calls -fno-common -pipe -fno-common -c binder.cpp clang: error: unknown argument: '-fno-tree-dce' make: *** [binder.o] Error 1</p> <p>Gem files will remain installed in /Users/fun-mac01/.rvm/gems/ruby-1.8.7-p374/gems/eventmachine-1.0.3 for inspection. Results logged to /Users/fun-mac01/.rvm/gems/ruby-1.8.7-p374/gems/eventmachine-1.0.3/ext/gem_make.out An error occurred while installing eventmachine (1.0.3), and Bundler cannot continue. Make sure that <code>gem install eventmachine -v '1.0.3'</code> succeeds before bundling.</p> <p>以上是 执行 bundle install 的时候出的错，不知道怎么解决，各位遇见过吗？</p> seraphim_houwei Wed, 24 Dec 2014 15:02:25 +0800 https://ruby-china.org/topics/23380 https://ruby-china.org/topics/23380 <p>rails 3.2.15 ,如何在 controller 中，只有一个线程去访问一段代码，其它线程处于等待状态。 有人说使用，Mutex 类，但是不好用，还有没有其它办法？ 建议越多越好，谢谢大家。</p> seraphim_houwei Tue, 11 Mar 2014 17:11:02 +0800 https://ruby-china.org/topics/17805 https://ruby-china.org/topics/17805 <p>举个例子，主线程一般都是从上至下按照一定顺序执行的，有些操作很耗费时间，但是主线程不需要等待这些操作返回。所以想在主线程中，异步启动一个新线程来处理这些操作，对于主线程来说，好像没有执行这些操作一样，这样主线程完成的速度就会大大提高。</p> seraphim_houwei Thu, 27 Feb 2014 11:28:12 +0800 https://ruby-china.org/topics/17523 https://ruby-china.org/topics/17523 <p>在 rails3.2 使用登录插件 Authlogic 3.1.0 , 比如 创建一个 model 为 user，按照 <a href="http://hi.baidu.com/youpingli/item/32cb32181be4a47571d5e8c6" rel="nofollow" target="_blank">http://hi.baidu.com/youpingli/item/32cb32181be4a47571d5e8c6</a> 网上的 例子做，都没有问题，但是 最后，我修改 model user，里面追加一列，结果会 抛异常。</p> seraphim_houwei Thu, 27 Jun 2013 21:33:39 +0800 https://ruby-china.org/topics/12051 https://ruby-china.org/topics/12051