Result of refactoring other code, uses time library and features a proc.

time_with_microseconds.rb

require 'time'
get_time = ->(t) { [t.iso8601, t.usec] }
report = 'something to report with a detailed time: %s'
puts report % get_time[Time.now]

#extconf.rb

require "mkmf"
create_makefile("ctime")

#test.rb

require_relative 'ctime'

puts "Time now is #{get_time}"
puts "#{e_sec} seconds since January 1, 1970"
t1 = Time.new(1970,01,01,0,0,0, "+00:00")# is there something else in Ruby Time to get this?
puts "Time now is #{t1 + e_sec}"
puts "#{system 'date'}"