get_subsystem

msys.py

@@ -1,3 +1,5 @@
+import os
+
 ARCHIVE = '.tar.xz'
 ARCHITECTURE = 'x86_64'
 CATALOG = '.files'
@@ -31,3 +33,13 @@ def get_subsystems(architecture, families):
         if subsystem in ARCHITECTURES_SUBSYSTEMS[architecture]:
             list.append(subsystem)
     return list
+
+
+def get_subsystem(architecture, subsystem):
+    list = []
+    if subsystem != SUBSYSTEM:
+        list.append(CRT)
+    list.append(subsystem)
+    if subsystem == SUBSYSTEM:
+        list.append(architecture)
+    return os.sep.join(list)