title: gem eventmachine fatal error: 'openssl/ssl.h' file not found
body: <p>Just installed El Capitan and can't install gem <code>eventmachine</code> <code>1.0.7</code>. <code>openssl</code> is at <code>1.0.2a-1</code>. Tried to use <code>--with-ssl-dir</code> but it seems ignored.</p>
  
  <p>Reported it to their <a href="https://github.com/eventmachine/eventmachine/issues/602" rel="noreferrer">github repo</a> as well.</p>
  
  <p>Any suggestions are really appreciated. Thanks.</p>
  
  <pre><code>$ ls /usr/local/Cellar/openssl/1.0.2a-1/include/openssl/ssl.h
  /usr/local/Cellar/openssl/1.0.2a-1/include/openssl/ssl.h
  
  $ gem install eventmachine -v '1.0.7' -- --with-ssl-dir=/usr/local/Cellar/openssl/1.0.2a-1/include
  /Users/pain/.rbenv/versions/2.1.2/bin/ruby -r ./siteconf20150612-56154-1hsjz2n.rb extconf.rb --with-ssl-dir=/usr/local/Cellar/openssl/1.0.2a-1/include
  checking for rb_trap_immediate in ruby.h,rubysig.h... no
  checking for rb_thread_blocking_region()... yes
  checking for ruby/thread.h... yes
  checking for rb_thread_call_without_gvl() in ruby/thread.h... yes
  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_thread_fd_select()... yes
  checking for rb_fdset_t in ruby/intern.h... yes
  checking for rb_wait_for_single_fd()... yes
  checking for rb_enable_interrupt()... no
  checking for rb_time_new()... yes
  checking for sys/event.h... yes
  checking for sys/queue... yes
  checking for clock_gettime()... no
  checking for gethrtime()... no
  creating Makefile
  
  make "DESTDIR=" clean
  
  make "DESTDIR="
  compiling binder.cpp
  In file included from binder.cpp:20:
  ./project.h:116:10: fatal error: 'openssl/ssl.h' file not found
  #include &lt;openssl/ssl.h&gt;
           ^
  1 error generated.
  make: *** [binder.o] Error 1
  
  make failed, exit code 2
  </code></pre>