incpth="`echo $C_INCLUDE_PATH | sed -e \"s%\([^$dir_sep]*\)$dir_sep*%\1 \1/readline %g\"`"
case "$osname" in
  os2);;
  cygwin*) incpth="$incpth\
    $cygtop/usr/local/include\
    $cygtop/usr/include\
    $cygtop/H-${arch}-cygwin32/${arch}-cygwin32/include\
    ";;
  *) incpth="$incpth /usr/include/$multipath\
    /usr/local/include\
    /usr/include\
    /opt/include\
    /opt/local/include\
    /opt/gnu/include\
    ";;
esac
basic_include_path=$incpth
