class RbSys::CargoBuilder::LinkFlagConverter

def self.convert_arg(arg)
  return [] if FILTERED_PATTERNS.any? { |p| p.match?(arg) }
  case arg.chomp
  when /^-L\s*(.+)$/
    ["-L", "native=#{$1}"]
  when /^--library=(\w+\S+)$/, /^-l\s*(\w+\S+)$/
    ["-l", $1]
  when /^-l\s*:lib(\S+).(so|dylib|dll)$/
    ["-l", "dylib=#{$1}"]
  when /^-F\s*(.*)$/
    ["-l", "framework=#{$1}"]
  else
    ["-C", "link-arg=#{arg}"]
  end
end