Adds the necessary changes to tpm_init to allow triggered initialization.

SConstruct

Index: SConstruct
diff --git a/SConstruct b/SConstruct
index 603beefd674adca6e57b36a826c56d463931e9d6..da56dd27fcfaf531d9a72c0e0fe798fcc83d5926 100644
--- a/SConstruct
+++ b/SConstruct
@@ -5,13 +5,51 @@
 import os
 import sys
 
+# Borrowed from updater
+# Protobuffer compilation
+def ProtocolBufferEmitter(target, source, env):
+  """ Inputs:
+          target: list of targets to compile to
+          source: list of sources to compile
+          env: the scons environment in which we are compiling
+      Outputs:
+          target: the list of targets we'll emit
+          source: the list of sources we'll compile"""
+  output = str(source[0])
+  output = output[0:output.rfind('.proto')]
+  target = [
+    output + '.pb.cc',
+    output + '.pb.h',
+  ]
+  return target, source
+
+def ProtocolBufferGenerator(source, target, env, for_signature):
+  """ Inputs:
+          source: list of sources to process
+          target: list of targets to generate
+          env: scons environment in which we are working
+          for_signature: unused
+      Outputs: a list of commands to execute to generate the targets from
+               the sources."""
+  commands = [
+    '/usr/bin/protoc '
+    ' --proto_path . ${SOURCES} --cpp_out .']
+  return commands
+
+proto_builder = Builder(generator = ProtocolBufferGenerator,
+                        emitter = ProtocolBufferEmitter,
+                        single_source = 1,
+                        suffix = '.pb.cc')
+
 env = Environment()
 
 # setup sources
 lib_sources = env.Split("""crypto.cc
+                           platform.cc
                            secure_blob.cc
                            tpm.cc
                            tpm_init.cc
+                           tpm_status.pb.cc
                            """)
 client_sources = env.Split("""main.cc
                            """) + lib_sources
@@ -20,7 +58,7 @@ env.Append(
     CPPPATH=['.', '..'],
     CPPFLAGS=['-pie', '-fstack-protector-all', '-fPIC',
               '-fno-exceptions', '-O2', '-Wall', '-Werror'],
-    LIBS = ['base', 'chromeos', 'crypto', 'rt', 'pthread', 'tspi'],
+    LIBS = ['base', 'chromeos', 'crypto', 'rt', 'protobuf', 'pthread', 'tspi'],
 )
 for key in Split('CC CXX AR RANLIB LD NM CFLAGS CCFLAGS'):
   value = os.environ.get(key)
@@ -32,8 +70,11 @@ for key in Split('PKG_CONFIG_LIBDIR PKG_CONFIG_PATH SYSROOT'):
   if os.environ.has_key(key):
     env['ENV'][key] = os.environ[key]
 
+env['BUILDERS']['ProtocolBuffer'] = proto_builder
+
 env.Append(LIBPATH = ['.'])
 
 env_lib = env.Clone()
+env_lib.ProtocolBuffer('tpm_status.pb.cc', 'tpm_status.proto')
 env_lib.Library('tpm_init', lib_sources)