class RbSys::Mkmf::Config

def cross_compiling?
  RbConfig::CONFIG["CROSS_COMPILING"] == "yes"
end

def initialize(builder)
  @builder = builder
  @force_install_rust_toolchain = false
  @auto_install_rust_toolchain = true
  @clean_after_install = rubygems_invoked?
  @rubygems_clean_dirs = ["./cargo-vendor"]
end

def method_missing(name, *args, &blk)
  @builder.send(name, *args, &blk)
end

def respond_to_missing?(name, include_private = false)
  @builder.respond_to?(name) || super
end

def rubygems_invoked?
  ENV.key?("SOURCE_DATE_EPOCH")
end