Merge pull request #629 from sstephenson/dep-checks

# Post-install check that the openssl extension was built.

build_package_verify_openssl() {

  "$RUBY_BIN" -e 'begin

    require "openssl"

  "$RUBY_BIN" -e '

    manager = ARGV[0]

    packages = {

      "apt-get" => Hash.new {|h,k| "lib#{k}-dev" }.update(

        "openssl" => "libssl-dev",

        "zlib" => "zlib1g-dev"

      ),

      "yum" => Hash.new {|h,k| "#{k}-devel" }.update(

        "yaml" => "libyaml-devel"

      )

    }

    failed = %w[openssl readline zlib yaml].reject do |lib|

      begin

        require lib

      rescue LoadError

    $stderr.puts "The Ruby openssl extension was not compiled. Missing the OpenSSL lib?"

        $stderr.puts "The Ruby #{lib} extension was not compiled."

      end

    end

    if failed.size > 0

      $stderr.puts "ERROR: Ruby install aborted due to missing extensions"

      $stderr.print "Try running `%s install -y %s` to fetch missing dependencies.\n\n" % [

        manager,

        failed.map { |lib| packages.fetch(manager)[lib] }.join(" ")

      ] unless manager.empty?

      $stderr.puts "Configure options used:"

      require "rbconfig"; require "shellwords"

      RbConfig::CONFIG.fetch("configure_args").shellsplit.each { |arg| $stderr.puts "  #{arg}" }

      exit 1

  end' >&4 2>&1

    end

  ' "$(basename "$(type -p yum apt-get | head -1)")" >&4 2>&1

}

# Ensure that directories listed in LDFLAGS exist