Add UUID, strlcpy, and their tests to util

util/stdlib/cxx.h

+// Copyright 2014 The Crashpad Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef CRASHPAD_UTIL_STDLIB_CXX_H_
+#define CRASHPAD_UTIL_STDLIB_CXX_H_
+
+// <ciso646> doesn’t do very much, and under libc++, it will cause the
+// _LIBCPP_VERSION macro to be defined properly. Under libstdc++, it doesn’t
+// cause __GLIBCXX__ to be defined, but if _LIBCPP_VERSION isn’t defined after
+// #including <ciso646>, assume libstdc++ and #include libstdc++’s internal
+// header that defines __GLIBCXX__.
+
+#include <ciso646>
+
+#if !defined(_LIBCPP_VERSION)
+#if defined(__has_include)
+#if __has_include(<bits/c++config.h>)
+#include <bits/c++config.h>
+#endif
+#else
+#include <bits/c++config.h>
+#endif
+#endif
+
+// libstdc++ does not identify its version directly, but identifies the GCC
+// package it is a part of via the __GLIBCXX__ macro, which is based on the date
+// of the GCC release. libstdc++ had sufficient C++11 support as of GCC 4.6.0,
+// __GLIBCXX__ 20110325, but maintenance releases in the 4.4 an 4.5 series
+// followed this date, so check for those versions by their date stamps.
+// http://gcc.gnu.org/onlinedocs/libstdc++/manual/abi.html#abi.versioning
+//
+// libc++, identified by _LIBCPP_VERSION, always supports C++11.
+#if __cplusplus >= 201103l &&                                                 \
+    ((defined(__GLIBCXX__) &&                                                 \
+      __GLIBCXX__ >= 20110325ul &&  /* GCC >= 4.6.0 */                        \
+      __GLIBCXX__ != 20110416ul &&  /* GCC 4.4.6 */                           \
+      __GLIBCXX__ != 20120313ul &&  /* GCC 4.4.7 */                           \
+      __GLIBCXX__ != 20110428ul &&  /* GCC 4.5.3 */                           \
+      __GLIBCXX__ != 20120702ul) ||  /* GCC 4.5.4 */                          \
+     (defined(_LIBCPP_VERSION)))
+#define CXX_LIBRARY_VERSION 2011
+#else
+#define CXX_LIBRARY_VERSION 2003
+#endif
+
+#endif  // CRASHPAD_UTIL_STDLIB_CXX_H_