Landing patch set 7 from https://codereview.chromium.org/1450113003/

runtime/platform/utils_linux.h

Index: runtime/platform/utils_linux.h
diff --git a/runtime/platform/utils_linux.h b/runtime/platform/utils_linux.h
index f2af4d15b6f9d2e83644df1bcd8ec27fe942716a..bb9594fbdbd65589cfb29dbe2104bb0a5e3ba63f 100644
--- a/runtime/platform/utils_linux.h
+++ b/runtime/platform/utils_linux.h
@@ -60,6 +60,21 @@ inline uint64_t Utils::HostToLittleEndian64(uint64_t value) {
   return htole64(value);
 }
 
+
+inline char* Utils::StrError(int err, char* buffer, size_t bufsize) {
+#if !defined(__GLIBC__) ||                                              \
+((_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) && !_GNU_SOURCE)
+  // Use the XSI version.
+  if (strerror_r(err, buffer, bufsize) != 0) {
+    snprintf(buffer, bufsize, "%s", "strerror_r failed");
+  }
+  return buffer;
+#else
+  // Use the GNU specific version.
+  return strerror_r(err, buffer, bufsize);
+#endif
+}
+
 }  // namespace dart
 
 #endif  // PLATFORM_UTILS_LINUX_H_