fix windows build scripts, add windows opus support

scripts/waifulib/msvc_pdb_ext.py

@@ -0,0 +1,48 @@
+#!/usr/bin/env python
+# encoding: utf-8
+# Rafaël Kooi 2019
+
+from waflib import TaskGen
+
+banned_extensions_list = ["rc", "asm", "masm"]
+
+@TaskGen.feature('c', 'cxx', 'fc')
+@TaskGen.after_method('propagate_uselib_vars')
+def add_pdb_per_object(self):
+	"""For msvc/fortran, specify a unique compile pdb per object, to work
+	around LNK4099. Flags are updated with a unique /Fd flag based on the
+	task output name. This is separate from the link pdb.
+	"""
+	if not hasattr(self, 'compiled_tasks'):
+		return
+
+	link_task = getattr(self, 'link_task', None)
+
+	for task in self.compiled_tasks:
+		if task.inputs and (task.inputs[0].name.lower().split(".")[-1] in banned_extensions_list):
+			continue
+
+		add_pdb = False
+		for flagname in ('CFLAGS', 'CXXFLAGS', 'FCFLAGS'):
+			# several languages may be used at once
+			for flag in task.env[flagname]:
+				if flag[1:].lower() == 'zi':
+					add_pdb = True
+					break
+
+		if add_pdb:
+			node = task.outputs[0].change_ext('.pdb')
+			pdb_flag = '/Fd:' + node.abspath()
+
+			for flagname in ('CFLAGS', 'CXXFLAGS', 'FCFLAGS'):
+				buf = [pdb_flag]
+				for flag in task.env[flagname]:
+					if flag[1:3] == 'Fd' or flag[1:].lower() == 'fs' or flag[1:].lower() == 'mp':
+						continue
+					buf.append(flag)
+				task.env[flagname] = buf
+
+			if link_task and not node in link_task.dep_nodes:
+				link_task.dep_nodes.append(node)
+			if not node in task.outputs:
+				task.outputs.append(node)