title: Missing symbol when installing ruby-2.3.0 on OS X 10.11.6 by RVM
body: <p>I was failing to install ruby-2.3.0 by rvm, while it worked with ruby-2.2.0.</p>
  
  <p>The error message is as below</p>
  
  <pre><code>Error running '__rvm_make -j 1',
  showing last 15 lines of /Users/Rookie/.rvm/log/1472865655_ruby-2.3.0/make.log
  compiling ./missing/explicit_bzero.c
  compiling ./missing/setproctitle.c
  compiling dmyenc.c
  linking miniruby
  config.status: creating ruby-runner.c
  dyld: lazy symbol binding failed: Symbol not found: _clock_gettime
  Referenced from: /Users/Rookie/.rvm/src/ruby-2.3.0/./miniruby (which was built for Mac OS X 10.12)
  Expected in: /usr/lib/libSystem.B.dylib
  
  dyld: Symbol not found: _clock_gettime
  Referenced from: /Users/Rookie/.rvm/src/ruby-2.3.0/./miniruby (which was built for Mac OS X 10.12)
  Expected in: /usr/lib/libSystem.B.dylib
  
  make: *** [.rbconfig.time] Trace/BPT trap: 5
  +__rvm_make:0&gt; return 2
  There has been an error while running make. Halting the installation.
  </code></pre>
  
  <p>/usr/lib/libSystem.B.dylib is where it is...</p>
  
  <p>Is there any way to fix it?</p>