Increase make parallelism to use all CPU cores

cflinuxfs4/recipe/base.rb

@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 require 'mini_portile2'
+require 'etc'
 require 'tmpdir'
 require 'fileutils'
 require_relative 'determine_checksum'
@@ -24,7 +25,7 @@ def configure_options
   end
 
   def compile
-    execute('compile', [make_cmd, '-j4'])
+    execute('compile', [make_cmd, "-j#{Etc.nprocessors}"])
   end
 
   def archive_filename

recipe/base.rb

@@ -1,6 +1,7 @@
 # encoding: utf-8
 require 'mini_portile'
 require 'net/ftp'
+require 'etc'
 require 'tmpdir'
 require 'fileutils'
 require_relative 'determine_checksum'
@@ -24,7 +25,7 @@ def configure_options
   end
 
   def compile
-    execute('compile', [make_cmd, '-j4'])
+    execute('compile', [make_cmd, "-j#{Etc.nprocessors}"])
   end
 
   def archive_filename

recipe/python.rb

@@ -58,7 +58,7 @@ def prefix_path
 
   def install_apt(packages)
     STDOUT.print "Running 'install dependencies' for #{@name} #{@version}... "
-    if run("sudo apt-get update && sudo apt-get -y install #{packages}")
+    if run("apt-get update && apt-get -y install #{packages}")
       STDOUT.puts "OK"
     else
       raise "Failed to complete install dependencies task"