Route the buiding of libnosys, libpthread through NaClSdkLibrary.

SConstruct

Index: SConstruct
===================================================================
--- SConstruct	(revision 8659)
+++ SConstruct	(working copy)
@@ -3416,8 +3416,13 @@
 nacl_env.AddMethod(NaClSharedLibrary)
 
 def NaClSdkLibrary(env, lib_name, *args, **kwargs):
+  gen_shared = not env.Bit('nacl_disable_shared')
+  if 'no_shared_lib' in kwargs:
+    if kwargs['no_shared_lib']:

[jvoung - send to chromium..., 2012/05/22 20:49:40]

Can't you still add a arg with a default value, instead of using kwargs, or is
that too confusing, e.g.,:

def foo(env, lib_name, no_shared_lib=False, *name, **kwargs):

[Robert Muth (chromium), 2012/05/22 21:16:36]

Sadly you cannot mix args that way in python
The only clean alternative would be to add a real argument. But that would
require changing all NaClSdkLibrary() uses

[jvoung - send to chromium..., 2012/05/22 23:22:13]

Well it worked on a simple example I tried, but there is probably some subtle
python rule where it would break so... yeah let's not mix them.

+      gen_shared = False
+    del kwargs['no_shared_lib']
   n = [env.ComponentLibrary(lib_name, *args, **kwargs)]
-  if not env.Bit('nacl_disable_shared'):
+  if gen_shared:
     n.append(NaClSharedLibrary(env, lib_name, *args, **kwargs))
   return n