update engine: 32- and 64-bit compile

src/platform/update_engine/subprocess.cc

Index: src/platform/update_engine/subprocess.cc
diff --git a/src/platform/update_engine/subprocess.cc b/src/platform/update_engine/subprocess.cc
index 89b6cadd03fd56fa88ecf875d78a6040cedee9ca..3a6597eb193bdfc6d0f761c674411d3180d1a431 100644
--- a/src/platform/update_engine/subprocess.cc
+++ b/src/platform/update_engine/subprocess.cc
@@ -9,6 +9,7 @@
 #include <vector>
 #include "chromeos/obsolete_logging.h"
 #include "base/scoped_ptr.h"
+#include "base/string_util.h"
 
 using std::string;
 using std::vector;
@@ -18,7 +19,7 @@ namespace chromeos_update_engine {
 void Subprocess::GChildExitedCallback(GPid pid, gint status, gpointer data) {
   COMPILE_ASSERT(sizeof(guint) == sizeof(uint32),
                  guint_uint32_size_mismatch);
-  guint *tag = reinterpret_cast<guint*>(data);
+  guint* tag = reinterpret_cast<guint*>(data);
   const SubprocessCallbackRecord& record = Get().callback_records_[*tag];
   if (record.callback)
     record.callback(status, record.callback_data);
@@ -38,16 +39,22 @@ void FreeArgv(char** argv) {
 
 uint32 Subprocess::Exec(const std::vector<std::string>& cmd,
                         ExecCallback callback,
-                        void *p) {
+                        void* p) {
   GPid child_pid;
-  GError *err;
-  scoped_array<char *> argv(new char*[cmd.size() + 1]);
+  GError* err;
+  scoped_array<char*> argv(new char*[cmd.size() + 1]);
   for (unsigned int i = 0; i < cmd.size(); i++) {
     argv[i] = strdup(cmd[i].c_str());
   }
   argv[cmd.size()] = NULL;
-  char *argp[1];
-  argp[0] = NULL;
+
+  scoped_array<char*> argp(new char*[2]);
+  argp[0] = argp[1] = NULL;
+  const char* kLdLibraryPathKey = "LD_LIBRARY_PATH";
+  if (getenv(kLdLibraryPathKey)) {
+    argp[0] = strdup(StringPrintf("%s=%s", kLdLibraryPathKey,
+                                  getenv(kLdLibraryPathKey)).c_str());
+  }
 
   SubprocessCallbackRecord callback_record;
   callback_record.callback = callback;
@@ -55,7 +62,7 @@ uint32 Subprocess::Exec(const std::vector<std::string>& cmd,
 
   bool success = g_spawn_async(NULL,  // working directory
                                argv.get(),
-                               argp,
+                               argp.get(),
                                G_SPAWN_DO_NOT_REAP_CHILD,  // flags
                                NULL,  // child setup function
                                NULL,  // child setup data pointer
@@ -66,7 +73,7 @@ uint32 Subprocess::Exec(const std::vector<std::string>& cmd,
     LOG(ERROR) << "g_spawn_async failed";
     return 0;
   }
-  guint *tag = new guint;
+  guint* tag = new guint;
   *tag = g_child_watch_add(child_pid, GChildExitedCallback, tag);
   callback_records_[*tag] = callback_record;
   return *tag;
@@ -80,13 +87,13 @@ void Subprocess::CancelExec(uint32 tag) {
 
 bool Subprocess::SynchronousExec(const std::vector<std::string>& cmd,
                                  int* return_code) {
-  GError *err = NULL;
-  scoped_array<char *> argv(new char*[cmd.size() + 1]);
+  GError* err = NULL;
+  scoped_array<char*> argv(new char*[cmd.size() + 1]);
   for (unsigned int i = 0; i < cmd.size(); i++) {
     argv[i] = strdup(cmd[i].c_str());
   }
   argv[cmd.size()] = NULL;
-  char *argp[1];
+  char* argp[1];
   argp[0] = NULL;
 
   bool success = g_spawn_sync(NULL,  // working directory