Route the buiding of libnosys, libpthread through NaClSdkLibrary.

src/untrusted/irt_stub/nacl.scons

 # -*- python -*-
-# Copyright (c) 2011 The Native Client Authors. All rights reserved.
+# Copyright (c) 2012 The Native Client Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 Import('env')
 
-libppapi_stub = env.ComponentLibrary('libppapi_stub', [
-    'ppapi_plugin_main.c',
-    'ppapi_plugin_start.c',
-    'plugin_main_irt.c',
-    'thread_creator.c'
-    ])
+libppapi_stub = env.NaClSdkLibrary(

[Roland McGrath, 2012/05/21 20:35:45]

It was an explicit choice not to build libppapi_stub as a shared library.  This
change gets it built as shared for the existing nacl-glibc toolchain, which we
do not want.  Nothing will actually use the shared libppapi_stub.so anyway
unless you were to change libppapi.so (the source file).

[Robert Muth (chromium), 2012/05/21 21:33:27]

It wont be built unless env.Bit('pnacl_shared_newlib') is true.

For PNaCl it would be nice to have a least the option to build
as many libraries as possible shared, especially the large ones.
This one is pretty small, I can take it out if you are worried 
about interference.

On 2012/05/21 20:35:45, Roland McGrath wrote:

[Roland McGrath, 2012/05/21 22:08:26]

That's not true.  NaClSdkLibrary always affects --nacl_glibc mode.
The preference for making libraries shared is exactly the same for the
existing nacl-glibc case.  This is one we previously decided for good
reason was better left as always static.

[robertm, 2012/05/22 13:55:16]

The keyword arg "no_shared_lib" was supposed to preserve the original behavior.
For libppapi_stub this is a moot point now since I reverted my changes and added
a comment.
see above

+    'libppapi_stub',
+    ['ppapi_plugin_main.c',
+     'ppapi_plugin_start.c',
+     'plugin_main_irt.c',
+     'thread_creator.c'
+     ],
+    no_shared_lib=not env.Bit('pnacl_shared_newlib'))
 env.AddLibraryToSdk(libppapi_stub)
 
 env.AddObjectToSdk(['libppapi.a'])
 if not env.Bit('nacl_disable_shared'):
   env.AddObjectToSdk(['libppapi.so'])
   if env.Bit('bitcode'):
     pso = env.InstallAs('libppapi.pso', 'libppapi.so')
     env.AddObjectToSdk(pso)