Homebrewでscreenを256色を有効にしてビルドする

/usr/local/Library/Formula/screen256.rb

参考 https://gist.github.com/1287202

require 'formula'                                                                                                                          
                                                                                                                                           
class Screen256 <Formula                                                                                                                   
  homepage 'http://www.gnu.org/software/screen/'                                                                                           
  url 'http://ftp.gnu.org/gnu/screen/screen-4.0.3.tar.gz'                                                                                  
  md5 '8506fd205028a96c741e4037de6e3c42'                                                                                                   
                                                                                                                                           
  # brew install --HEAD to get the latests, includes vertical split, mapped                                                                
  # to C-a |                                                                                                                               
  head 'git://git.savannah.gnu.org/screen.git', :branch => 'master'                                                                        
                                                                                                                                           
  def patches                                                                                                                              
    unless ARGV.build_head?                                                                                                                
      # fixes stropts.h compile error (patch from MacPorts:                                                                                
      # https://trac.macports.org/ticket/13009), not necessary with --HEAD                                                                 
      { :p0 => "https://trac.macports.org/raw-attachment/ticket/13009/patch-pty.c" }                                                       
    end                                                                                                                                    
  end                                                                                                                                      
                                                                                                                                           
  def install                                                                                                                              
    if ARGV.build_head?                                                                                                                    
      ENV['CC'] = "gcc"                                                                                                                    
      cd 'src'                                                                                                                             
      system "autoheader"                                                                                                                  
      system "autoconf"                                                                                                                    
    end                                                                                                                                    
    system "./configure", "--enable-colors256", "--mandir=#{man}", "--infodir=#{info}", "--prefix=#{prefix}"                               
    system "make"                                                                                                                          
    system "make install"                                                                                                                  
  end                                                                                                                                      
end       

インストール

brew install screen256

.zshrc

alias screen='/usr/local/Cellar/screen256/4.0.3/bin/screen'