-Many fixes to windows build system with Mingw on Windows. Fixes #2690

methods.py

@@ -1309,7 +1309,50 @@ def android_add_to_attributes(self,file):
 
 def disable_module(self):
 	self.disabled_modules.append(self.current_module)
-	
+
+def use_windows_spawn_fix(self):
+
+    if (os.name!="nt"):
+	return #not needed, only for windows
+
+    self.split_drivers=True
+
+    import subprocess
+
+    def mySubProcess(cmdline,env):
+	    #print "SPAWNED : " + cmdline
+	    startupinfo = subprocess.STARTUPINFO()
+	    startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
+	    proc = subprocess.Popen(cmdline, stdin=subprocess.PIPE, stdout=subprocess.PIPE,
+		    stderr=subprocess.PIPE, startupinfo=startupinfo, shell = False, env = env)
+	    data, err = proc.communicate()
+	    rv = proc.wait()
+	    if rv:
+		    print "====="
+		    print err
+		    print "====="
+	    return rv
+
+    def mySpawn(sh, escape, cmd, args, env):
+
+	    newargs = ' '.join(args[1:])
+	    cmdline = cmd + " " + newargs
+
+	    rv=0
+	    if len(cmdline) > 32000 and cmd.endswith("ar") :
+		    cmdline = cmd + " " + args[1] + " " + args[2] + " "
+		    for i in range(3,len(args)) :
+			    rv = mySubProcess( cmdline + args[i], env )
+			    if rv :
+				    break
+	    else:
+		    rv = mySubProcess( cmdline, env )
+
+	    return rv
+
+    self['SPAWN'] = mySpawn
+
+
 def save_active_platforms(apnames,ap):
 
 	for x in ap: