old_contents: import subprocess, wget, os, shutil, sys, glob
  
  if not os.path.exists('swig-scilab'):
  	subprocess.call('git clone https://github.com/swig/swig.git -b gsoc2012-scilab swig-scilab', shell = True, stdout = sys.stdout, stderr = sys.stderr)
  else:
  	subprocess.call('git pull', shell = True, cwd = 'swig-scilab', stdout = sys.stdout, stderr = sys.stderr)
  os.chdir('swig-scilab')
  if not glob.glob('pcre-*.tar.gz'):
      for rev in ['8.34','8.35','8.36']:
          try:
              wget.download('ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-'+rev+'.tar.gz'); break
          except:
              pass
  subprocess.check_call('Tools/pcre-build.sh', shell = True, stdout = sys.stdout, stderr = sys.stderr)
  subprocess.check_call('./autogen.sh', shell = True, stdout = sys.stdout, stderr = sys.stderr)
  subprocess.check_call('./configure --disable-ccache --with-scilab-inc=${SCILAB_HOME}/include --with-scilab=${SCILAB_HOME}/bin/scilab-cli --prefix=${PWD}/swig-scilab-bin', shell = True, stdout = sys.stdout, stderr = sys.stderr)
  subprocess.check_call('make', shell = True, stdout = sys.stdout, stderr = sys.stderr)
  subprocess.check_call('make install', shell = True, stdout = sys.stdout, stderr = sys.stderr)
  subprocess.check_call('cp swig swig3.0', shell = True, stdout = sys.stdout, stderr = sys.stderr, cwd='swig-scilab-bin/bin')
  subprocess.check_call('cp swig swig2.0', shell = True, stdout = sys.stdout, stderr = sys.stderr, cwd='swig-scilab-bin/bin')
  
new_contents: import subprocess, wget, os, shutil, sys, glob
  
  if not os.path.exists('swig-scilab'):
  	subprocess.call('git clone https://github.com/swig/swig.git -b gsoc2012-scilab swig-scilab', shell = True, stdout = sys.stdout, stderr = sys.stderr)
  else:
  	subprocess.call('git pull', shell = True, cwd = 'swig-scilab', stdout = sys.stdout, stderr = sys.stderr)
  os.chdir('swig-scilab')
  if not glob.glob('pcre-*.tar.gz'):
      for rev in ['8.34','8.35','8.36']:
          try:
              wget.download('ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-'+rev+'.tar.gz'); break
          except:
              pass
  
  if '--windows' is in sys.argv:
      env = {}
  else:
      env = dict(CC = 'i686-w64-mingw32-g++', CC = 'i686-w64-mingw32-gcc')
  commons = dict(shell = True, stdout = sys.stdout, stderr = sys.stderr, env = env)
  subprocess.check_call('Tools/pcre-build.sh', **commons)
  subprocess.check_call('./autogen.sh', **commons)
  subprocess.check_call('./configure --disable-ccache --with-scilab-inc=${SCILAB_HOME}/include --with-scilab=${SCILAB_HOME}/bin/scilab-cli --prefix=${PWD}/swig-scilab-bin', **commons)
  subprocess.check_call('make', **commons)
  subprocess.check_call('make install', **commons)
  subprocess.check_call('cp swig swig3.0', cwd='swig-scilab-bin/bin', **commons)
  subprocess.check_call('cp swig swig2.0', cwd='swig-scilab-bin/bin', **commons)
subject: Update swig scilab builder script to enable windows cross compilation