command line output

x_x > gem install thin
Building native extensions.  This could take a while...
ERROR:  Error installing thin:
  ERROR: Failed to build gem native extension.

        /Users/samuel/.rvm/rubies/ruby-1.9.3-p327/bin/ruby extconf.rb
checking for main() in -lssl... *** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for more
details.  You may need configuration options.

Provided configuration options:
	--with-opt-dir
	--without-opt-dir
	--with-opt-include
	--without-opt-include=${opt-dir}/include
	--with-opt-lib
	--without-opt-lib=${opt-dir}/lib
	--with-make-prog
	--without-make-prog
	--srcdir=.
	--curdir
	--ruby=/Users/samuel/.rvm/rubies/ruby-1.9.3-p327/bin/ruby
	--with-openssl-config
	--without-openssl-config
	--with-pkg-config
	--without-pkg-config
	--with-ssl-dir
	--without-ssl-dir
	--with-ssl-include
	--without-ssl-include=${ssl-dir}/include
	--with-ssl-lib
	--without-ssl-lib=${ssl-dir}/lib
	--with-ssllib
	--without-ssllib
/Users/samuel/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:369:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
	from /Users/samuel/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:449:in `try_link0'
	from /Users/samuel/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:464:in `try_link'
	from /Users/samuel/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:607:in `try_func'
	from /Users/samuel/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:833:in `block in have_library'
	from /Users/samuel/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:778:in `block in checking_for'
	from /Users/samuel/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:272:in `block (2 levels) in postpone'
	from /Users/samuel/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:242:in `open'
	from /Users/samuel/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:272:in `block in postpone'
	from /Users/samuel/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:242:in `open'
	from /Users/samuel/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:268:in `postpone'
	from /Users/samuel/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:777:in `checking_for'
	from /Users/samuel/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/mkmf.rb:828:in `have_library'
	from extconf.rb:5:in `block in check_libs'
	from extconf.rb:5:in `each'
	from extconf.rb:5:in `all?'
	from extconf.rb:5:in `check_libs'
	from extconf.rb:39:in `manual_ssl_config'
	from extconf.rb:61:in `<main>'


Gem files will remain installed in /Users/samuel/.rvm/gems/ruby-1.9.3-p327/gems/eventmachine-1.0.0 for inspection.
Results logged to /Users/samuel/.rvm/gems/ruby-1.9.3-p327/gems/eventmachine-1.0.0/ext/gem_make.out

mkmf.log

package configuration for openssl is not found
"/usr/bin/gcc-4.2 -o conftest -I/Users/samuel/.rvm/rubies/ruby-1.9.3-p327/include/ruby-1.9.1/x86_64-darwin12.2.0 -I/Users/samuel/.rvm/rubies/ruby-1.9.3-p327/include/ruby-1.9.1/ruby/backward -I/Users/samuel/.rvm/rubies/ruby-1.9.3-p327/include/ruby-1.9.1 -I. -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE   -I/Users/mpapis/.sm/pkg/active/include -pipe conftest.c  -L. -L/Users/samuel/.rvm/rubies/ruby-1.9.3-p327/lib -L. -Bstatic -L/Users/mpapis/.sm/pkg/active/lib   -arch x86_64   -lruby-static  -lpthread -ldl -lobjc "
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: int main() {return 0;}
/* end */