Installation fails on 1.9.3, MacOSX

[yasuhito]

See also #6

/Users/yasuhito/.rvm/rubies/ruby-1.9.3-p545/bin/ruby extconf.rb
checking for tgetent() in -ltinfo... *** 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
        --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/yasuhito/.rvm/rubies/ruby-1.9.3-p545/bin/ruby
        --with-curses-dir
        --without-curses-dir
        --with-curses-include
        --without-curses-include=${curses-dir}/include
        --with-curses-lib
        --without-curses-lib=${curses-dir}/lib
        --with-ncurses-dir
        --without-ncurses-dir
        --with-ncurses-include
        --without-ncurses-include=${ncurses-dir}/include
        --with-ncurses-lib
        --without-ncurses-lib=${ncurses-dir}/lib
        --with-termcap-dir
        --without-termcap-dir
        --with-termcap-include
        --without-termcap-include=${termcap-dir}/include
        --with-termcap-lib
        --without-termcap-lib=${termcap-dir}/lib
        --with-tinfolib
        --without-tinfolib
/Users/yasuhito/.rvm/rubies/ruby-1.9.3-p545/lib/ruby/1.9.1/mkmf.rb:381:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
        from /Users/yasuhito/.rvm/rubies/ruby-1.9.3-p545/lib/ruby/1.9.1/mkmf.rb:461:in `try_link0'
        from /Users/yasuhito/.rvm/rubies/ruby-1.9.3-p545/lib/ruby/1.9.1/mkmf.rb:476:in `try_link'
        from /Users/yasuhito/.rvm/rubies/ruby-1.9.3-p545/lib/ruby/1.9.1/mkmf.rb:619:in `try_func'
        from /Users/yasuhito/.rvm/rubies/ruby-1.9.3-p545/lib/ruby/1.9.1/mkmf.rb:845:in `block in have_library'
        from /Users/yasuhito/.rvm/rubies/ruby-1.9.3-p545/lib/ruby/1.9.1/mkmf.rb:790:in `block in checking_for'
        from /Users/yasuhito/.rvm/rubies/ruby-1.9.3-p545/lib/ruby/1.9.1/mkmf.rb:284:in `block (2 levels) in postpone'
        from /Users/yasuhito/.rvm/rubies/ruby-1.9.3-p545/lib/ruby/1.9.1/mkmf.rb:254:in `open'
        from /Users/yasuhito/.rvm/rubies/ruby-1.9.3-p545/lib/ruby/1.9.1/mkmf.rb:284:in `block in postpone'
        from /Users/yasuhito/.rvm/rubies/ruby-1.9.3-p545/lib/ruby/1.9.1/mkmf.rb:254:in `open'
        from /Users/yasuhito/.rvm/rubies/ruby-1.9.3-p545/lib/ruby/1.9.1/mkmf.rb:280:in `postpone'
        from /Users/yasuhito/.rvm/rubies/ruby-1.9.3-p545/lib/ruby/1.9.1/mkmf.rb:789:in `checking_for'
        from /Users/yasuhito/.rvm/rubies/ruby-1.9.3-p545/lib/ruby/1.9.1/mkmf.rb:840:in `have_library'
        from extconf.rb:29:in `<main>'

extconf failed, exit code 1