Gem::Ext::CargoBuilder#linker_args

# File tmp/rubies/ruby-4.0.0/lib/rubygems/ext/cargo_builder.rb, line 159
def linker_args
  cc_flag = self.class.shellsplit(makefile_config("CC"))
  # Avoid to ccache like tool from Rust build
  # see https://github.com/ruby/rubygems/pull/8521#issuecomment-2689854359
  # ex. CC="ccache gcc" or CC="sccache clang --any --args"
  cc_flag.shift if cc_flag.size >= 2 && !cc_flag[1].start_with?("-")
  linker = cc_flag.shift
  link_args = cc_flag.flat_map {|a| ["-C", "link-arg=#{a}"] }

  return mswin_link_args if linker == "cl"

  ["-C", "linker=#{linker}", *link_args]
end