require "mkmf"
require "ftools"

# Linux and Windows should use install.rb instead
if RUBY_PLATFORM =~ /windows|win32|mingw|cygwin|dos|linux/
   STDERR.puts "For this platform, run 'ruby install.rb' instead"
   STDERR.puts "Exiting..."
   exit
end

# Move any .rb files to .orig to prevent them from being installed
# during make site-install.
File.move("lib/sys/linux.rb","lib/sys/linux.orig") rescue nil
File.move("lib/sys/windows.rb","lib/sys/windows.orig") rescue nil 

File.delete('cpu.c') if File.exists?('cpu.c')

case RUBY_PLATFORM
   when /hpux/i
      File.symlink("lib/sys/hpux.c", "cpu.c")
      create_makefile("sys/cpu")
   when /sunos|solaris/i
      File.symlink("lib/sys/sunos.c", "cpu.c")
      unless have_func("getloadavg")
         have_library("kstat")
      end
      create_makefile("sys/cpu")
   when /freebsd/i
      File.symlink("lib/sys/freebsd.c", "cpu.c")
      have_library("kvm")
      create_makefile("sys/cpu")
   when /linux|dos|windows|win32|mingw|cygwin/i
      STDERR.puts "Run 'ruby install.rb' instead for this platform"
   else
      STDERR.puts "This platform is not currently supported.  Exiting..."
end