Add shared library version of libcli_main

ports/nacl-spawn/nacl_spawn.cc

 // Copyright (c) 2014 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.
 
 // Emulates spawning/waiting process by asking JavaScript to do so.
 
 // Include quoted spawn.h first so we can build in the presence of an installed
 // copy of nacl-spawn.
 #include "spawn.h"
 
@@ skipping 37 matching lines @@
 
 struct NaClSpawnReply {
   pthread_mutex_t mu;
   pthread_cond_t cond;
 
   pp::VarDictionary result;
 };
 
 static std::string GetCwd() {
   char cwd[PATH_MAX + 1];
-  // TODO(hamaji): Remove this #if and always call getcwd.
-  // https://code.google.com/p/naclports/issues/detail?id=109
-#if defined(__GLIBC__)
-  if (!getwd(cwd))
-#else
   if (!getcwd(cwd, PATH_MAX))
-#endif
     assert(0);
   return cwd;
 }
 
 static std::string GetAbsPath(const std::string& path) {
   assert(!path.empty());
   if (path[0] == '/')
     return path;
   else
     return GetCwd() + '/' + path;
@@ skipping 206 matching lines @@
     interpreter = std::string(start, end - start);
   }
   FindInterpreter(&interpreter);
   VarArrayInsert(0, interpreter, &args);
   *prog = interpreter;
   return true;
 }
 
 static bool UseBuiltInFallback(std::string* prog, pp::VarDictionary* req) {
   if (prog->find('/') == std::string::npos) {
-    bool found = false;
     const char* path_env = getenv("PATH");
     std::vector<std::string> paths;
     GetPaths(path_env, &paths);
     if (GetFileInPaths(*prog, paths, prog)) {
       // Update argv[0] to match prog if we ended up changing it.
       pp::Var argsv = req->Get("args");
       assert(argsv.is_array());
       pp::VarArray args(argsv);
       args.Set(0, *prog);
     } else {
@@ skipping 320 matching lines @@
     return -1;
   }
 
   pipefd[0] = readSocket;
   pipefd[1] = writeSocket;
 
   return 0;
 }
 
 };  // extern "C"