Generate top-level code from symbol tables

Rakefile

@@ -20,13 +20,15 @@ task default: ['source/main.elna', TMP + 'boot/elna'] do |t|
 end
 
 rule(/boot\/.+\.o$/ => ->(file) {
-  Pathname.new('source') +
+  source = Pathname.new('source') +
     Pathname.new(file).relative_path_from(TMP + 'boot').sub_ext('.elna')
+
+  [HOST_INSTALL + 'bin/gelna', source]
 }) do |t|
   Pathname.new(t.name).dirname.mkpath
-  compiler = HOST_INSTALL + 'bin/gelna'
+  sources, compiler = t.prerequisites.partition { |source| source.end_with? '.elna' }
 
-  sh compiler.to_path, '-c', '-o', t.name, *t.prerequisites
+  sh *compiler, '-c', '-O0', '-g', '-o', t.name, *sources
 end
 
 file TMP + 'boot/elna' => FileList['source/**/*.elna'].reject { |file|