Make libnosys function stubs part of libnacl

src/untrusted/nosys/nacl.scons

 # -*- python -*-
 # 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')
 
-sources = ['access.c',
-           'chmod.c',
-           'chown.c',
-           'endpwent.c',
-           'environ.c',
-           'execle.c',
-           'execvp.c',
-           'execl.c',
-           'execv.c',
-           'execlp.c',
-           'execve.c',
-           '_execve.c',
-           'fcntl.c',
-           'fchdir.c',
-           'fchmod.c',
-           'fchown.c',
-           'fdatasync.c',
-           'fork.c',
-           'fsync.c',
-           'ftruncate.c',
-           'get_current_dir_name.c',
-           'getegid.c',
-           'geteuid.c',
-           'getgid.c',
-           'getlogin.c',
-           'getrusage.c',
-           'getppid.c',
-           'getpwent.c',
-           'getpwnam.c',
-           'getpwnam_r.c',
-           'getpwuid.c',
-           'getpwuid_r.c',
-           'getuid.c',
-           'getwd.c',
-           'ioctl.c',
-           'isatty.c',
-           'issetugid.c',
-           'kill.c',
-           'lchown.c',
-           'link.c',
-           'llseek.c',
-           'lstat.c',
-           'pclose.c',
-           'pipe.c',
-           'popen.c',
-           'pselect.c',
-           'raise.c',
-           'readlink.c',
-           'remove.c',
-           'rename.c',
-           'select.c',
-           'setegid.c',
-           'seteuid.c',
-           'setgid.c',
-           'setpwent.c',
-           'settimeofday.c',
-           'setuid.c',
-           'signal.c',
-           'sigprocmask.c',
-           'symlink.c',
-           'system.c',
-           'times.c',
-           'tmpfile.c',
-           'truncate.c',
-           'ttyname.c',
-           'ttyname_r.c',
-           'umask.c',
-           'utime.c',
-           'utimes.c',
-           'vfork.c',
-           'wait.c',
-           'waitpid.c',
-           ]
+# The libnosys is kept for the backward compatibility and is to be removed
+# eventually once all the clients get updated. Although it is technically
+# an empty library, we need to build it with some dummy content as PNaCl
+# scripts complain when the archive is really empty. We might remove the

[Mark Seaborn, 2013/08/23 15:45:22]

Can you file a bug about this problem with the PNaCl toolchain, please, and link
to it here?

[Petr Hosek, 2013/08/23 21:35:07]

I have already updated the PNaCl toolchain so this hack is no longer needed.

+# dummy content once the scripts are updated to remove this restriction.
 
-libnosys = env.ComponentLibrary('libnosys', sources)
+libnosys = env.ComponentLibrary('libnosys', ['_dummy.c'])
 env.AddLibraryToSdk(libnosys)