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diff --git a/o3d/import/linux/collada_conditioner_linux.cc b/o3d/import/linux/collada_conditioner_linux.cc
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+/*
+ * Copyright 2009, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+//
+// This file contains the defintions of the functions in the
+// conditioner namespace, which do the bulk of the work of
+// conditioning a Collada file for use in O3D.
+
+#include "import/cross/precompile.h"
+
+#include <sys/wait.h>
+#include <vector>
+
+#include "base/base_paths.h"
+#include "base/file_path.h"
+#include "base/path_service.h"
+#include "core/cross/error.h"
+#include "core/cross/service_locator.h"
+#include "import/cross/collada.h"
+#include "import/cross/collada_conditioner.h"
+
+namespace o3d {
+
+bool ColladaConditioner::CompileHLSL(const String& shader_source,
+                                     const String& vs_entry,
+                                     const String& ps_entry) {
+  // The HLSL compiler isn't available on Linux.
+  return true;
+}
+
+// Find cgc executable, and run it on the input so that we can get a
+// preprocessed version out.
+bool ColladaConditioner::PreprocessShaderFile(const FilePath& in_filename,
+                                              const FilePath& out_filename) {
+  FilePath executable_path;
+  if (!PathService::Get(base::DIR_EXE, &executable_path)) {
+    O3D_ERROR(service_locator_) << "Couldn't get executable path.";
+    return false;
+  }
+  executable_path = executable_path.Append(FILE_PATH_LITERAL("cgc"));
+
+  std::vector<const char*> args;
+  args.push_back(executable_path.value().c_str());
+  args.push_back("-E");
+  args.push_back(in_filename.value().c_str());
+  args.push_back("-o");
+  args.push_back(out_filename.value().c_str());
+  args.push_back(NULL);
+  char** args_array = const_cast<char**>(&*args.begin());
+
+  pid_t pid = ::fork();
+  if (pid < 0) {
+    return false;
+  }
+  if (pid == 0) {
+    DLOG(INFO) << "Now invoking '"
+               << args_array[0] << " "
+               << args_array[1] << " "
+               << args_array[2] << " "
+               << args_array[3] << " "
+               << args_array[4] << "'";
+    char *environ[] = {NULL};
+    ::execve(args[0], args_array, environ);
+    NOTREACHED() << "Problems invoking "
+                 << args_array[0] << " "
+                 << args_array[1] << " "
+                 << args_array[2] << " "
+                 << args_array[3] << " "
+                 << args_array[4];
+  }
+
+  int status;
+  ::wait(&status);
+  if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
+    return true;
+  } else {
+    if (WIFEXITED(status)) {
+      DLOG(ERROR) << "Cgc terminated with status: " << WEXITSTATUS(status);
+    }
+    if (WIFSIGNALED(status)) {
+      DLOG(ERROR) << "Cgc received a signal: " << WTERMSIG(status);
+      if (WCOREDUMP(status)) {
+        DLOG(ERROR) << "and Cgc dumped a core file.";
+      }
+    }
+    if (WIFSTOPPED(status)) {
+      DLOG(ERROR) << "Cgc is stopped on a signal: " << WSTOPSIG(status);
+    }
+  }
+  return false;
+}
+}  // end namespace o3d