Check if RTLD_DEEPBIND is defined before using it.

base/native_library_posix.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/native_library.h"
 
 #include <dlfcn.h>
 
 #include "base/files/file_path.h"
 #include "base/logging.h"
@@ skipping 12 matching lines @@
                                            const NativeLibraryOptions& options,
                                            NativeLibraryLoadError* error) {
   // dlopen() opens the file off disk.
   ThreadRestrictions::AssertIOAllowed();
 
   // We deliberately do not use RTLD_DEEPBIND by default.  For the history why,
   // please refer to the bug tracker.  Some useful bug reports to read include:
   // http://crbug.com/17943, http://crbug.com/17557, http://crbug.com/36892,
   // and http://crbug.com/40794.
   int flags = RTLD_LAZY;
-#if defined(OS_ANDROID)
-  // Android dlopen() requires further investigation, as it might vary across
-  // versions. Crash here to warn developers that they're trying to rely on
-  // uncertain behavior.
+#if defined(OS_ANDROID) || !defined(RTLD_DEEPBIND)
+  // Certain platforms don't define RTLD_DEEPBIND. Android dlopen() requires
+  // further investigation, as it might vary across versions. Crash here to
+  // warn developers that they're trying to rely on uncertain behavior.
   CHECK(!options.prefer_own_symbols);
 #else
   if (options.prefer_own_symbols)
     flags |= RTLD_DEEPBIND;
 #endif
   void* dl = dlopen(library_path.value().c_str(), flags);
   if (!dl && error)
     error->message = dlerror();
 
   return dl;
@@ skipping 14 matching lines @@
   return dlsym(library, name.data());
 }
 
 // static
 std::string GetNativeLibraryName(StringPiece name) {
   DCHECK(IsStringASCII(name));
   return "lib" + name.as_string() + ".so";
 }
 
 }  // namespace base