NaCl base bringup....

base/safe_strerror_posix.cc

Index: base/safe_strerror_posix.cc
===================================================================
--- base/safe_strerror_posix.cc	(revision 65551)
+++ base/safe_strerror_posix.cc	(working copy)
@@ -2,13 +2,16 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "build/build_config.h"
 #include "base/safe_strerror_posix.h"
 
 #include <errno.h>
 #include <stdio.h>
 #include <string.h>
 
-#if defined(__GLIBC__) && defined(__GNUC__)
+#define USE_HISTORICAL_STRERRO_R (defined(__GLIBC__) || defined(OS_NACL))
+
+#if USE_HISTORICAL_STRERRO_R && defined(__GNUC__)
 // GCC will complain about the unused second wrap function unless we tell it
 // that we meant for them to be potentially unused, which is exactly what this
 // attribute is for.
@@ -17,7 +20,7 @@
 #define POSSIBLY_UNUSED
 #endif
 
-#if defined(__GLIBC__)
+#if USE_HISTORICAL_STRERRO_R
 // glibc has two strerror_r functions: a historical GNU-specific one that
 // returns type char *, and a POSIX.1-2001 compliant one available since 2.3.4
 // that returns int. This wraps the GNU-specific one.
@@ -37,7 +40,7 @@
   // The GNU version never fails. Unknown errors get an "unknown error" message.
   // The result is always null terminated.
 }
-#endif  // __GLIBC__
+#endif  // USE_HISTORICAL_STRERRO_R
 
 // Wrapper for strerror_r functions that implement the POSIX interface. POSIX
 // does not define the behaviour for some of the edge cases, so we wrap it to