nacl-mounts: Fix build on newlib

libraries/nacl-mounts/test.nacl/DevTest.cc

 /*
  * Copyright (c) 2012 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.
  */
 
 #include "gtest/gtest.h"
 
 #include <fcntl.h>
 #include <sys/types.h>
+#ifdef __GLIBC__
 #include <sys/select.h>
+#endif
 #include <sys/stat.h>
 #include <unistd.h>
 
 #include <algorithm>
 
 TEST(DevTest, Simple) {
   struct stat buf;
   EXPECT_EQ(0, stat("/dev/random", &buf));
   int h = open("/dev/random", O_RDONLY);
   EXPECT_GT(h, 0);
   char buff[5];
   EXPECT_EQ(5, read(h, reinterpret_cast<void*>(buff), 5));
 
   EXPECT_EQ(0, stat("/dev/urandom", &buf));
   int h2 = open("/dev/urandom", O_RDONLY);
   EXPECT_GT(h2, 0);
   EXPECT_EQ(5, read(h2, reinterpret_cast<void*>(buff), 5));
 
   int q = open("/dev/null", O_RDWR);
   EXPECT_EQ(5, write(q, reinterpret_cast<void*>(buff), 5));
   EXPECT_EQ(0, read(q, reinterpret_cast<void*>(buff), 5));
 }
 
+#ifdef __GLIBC__
 TEST(DevTest, Select) {
   int random = open("/dev/random", O_RDONLY);
   EXPECT_GT(random, 0);
   int null = open("/dev/null", O_RDWR);
   EXPECT_GT(null, 0);
 
   fd_set readfds, writefds, exceptfds;
   FD_ZERO(&readfds);
   FD_ZERO(&writefds);
   FD_ZERO(&exceptfds);
@@ skipping 11 matching lines @@
 
   EXPECT_TRUE(FD_ISSET(random, &readfds));
   EXPECT_TRUE(FD_ISSET(null, &readfds));
 
   EXPECT_FALSE(FD_ISSET(random, &writefds));
   EXPECT_TRUE(FD_ISSET(null, &writefds));
 
   EXPECT_FALSE(FD_ISSET(random, &exceptfds));
   EXPECT_FALSE(FD_ISSET(null, &exceptfds));
 }
+#endif  // __GLIBC__