Add my homegrown cross compiler scripts

1 files changed, 57 insertions, 0 deletions

diff --git a/rakelib/stage.rake b/rakelib/stage.rake
new file mode 100644
index 0000000..80f704d
--- /dev/null
+++ b/rakelib/stage.rake
@@ -0,0 +1,57 @@
+# This Source Code Form is subject to the terms of the Mozilla Public License,
+# v. 2.0. If a copy of the MPL was not distributed with this file, You can
+# obtain one at https://mozilla.org/MPL/2.0/. -}
+# frozen_string_literal: true
+
+CROSS_GCC = 'build/rootfs/bin/riscv32-unknown-linux-gnu-gcc'
+SYSROOT = 'build/sysroot'
+QEMU = 'qemu-riscv32'
+
+def assemble_stage(output, compiler, source)
+  arguments = [QEMU, '-L', SYSROOT, *compiler]
+
+  puts Term::ANSIColor.green(arguments * ' ')
+  puts
+  Open3.popen2(*arguments) do |qemu_in, qemu_out|
+    qemu_in.write File.read(*source)
+    qemu_in.close
+
+    IO.copy_stream qemu_out, output
+    qemu_out.close
+  end
+end
+
+Dir.glob('boot/*.s').each do |assembly_source|
+  target_object = Pathname.new('build/boot') + Pathname.new(assembly_source).basename.sub_ext('.o')
+
+  file target_object.to_s => [assembly_source, 'build/boot'] do |t|
+    sh CROSS_GCC, '-c', '-o', t.name, assembly_source
+  end
+end
+
+desc 'Initial stage'
+file 'build/boot/stage1' => ['build/boot/tokenizer.o', 'build/boot/stage1.o', 'build/boot/common-boot.o'] do |t|
+  sh CROSS_GCC, '-nostdlib', '-o', t.name, *t.prerequisites
+end
+
+file 'build/boot/stage2a.s' => ['build/boot/stage1', 'boot/stage2.elna'] do |t|
+  source, exe = t.prerequisites.partition { |prerequisite| prerequisite.end_with? '.elna' }
+
+  File.open t.name, 'w' do |output|
+    assemble_stage output, exe, source
+  end
+end
+
+['build/boot/stage2a', 'build/boot/stage2b'].each do |exe|
+  file exe => [exe.ext('.s'), 'build/boot/common-boot.o'] do |t|
+    sh CROSS_GCC, '-nostdlib', '-o', t.name, *t.prerequisites
+  end
+end
+
+file 'build/boot/stage2b.s' => ['build/boot/stage2a', 'boot/stage2.elna'] do |t|
+  source, exe = t.prerequisites.partition { |prerequisite| prerequisite.end_with? '.elna' }
+
+  File.open t.name, 'w' do |output|
+    assemble_stage output, exe, source
+  end
+end