Add gmock into our dependencies.

third_party/boost/boost/config/compiler/digitalmars.hpp

Index: third_party/boost/boost/config/compiler/digitalmars.hpp
diff --git a/third_party/boost/boost/config/compiler/digitalmars.hpp b/third_party/boost/boost/config/compiler/digitalmars.hpp
new file mode 100644
index 0000000000000000000000000000000000000000..46848479b741a6f8c78a838a8449bee56d78f92f
--- /dev/null
+++ b/third_party/boost/boost/config/compiler/digitalmars.hpp
@@ -0,0 +1,67 @@
+//  Copyright (C) Christof Meerwald 2003
+//  Copyright (C) Dan Watkins 2003
+//
+//  Use, modification and distribution are subject to the 
+//  Boost Software License, Version 1.0. (See accompanying file 
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  Digital Mars C++ compiler setup:
+#define BOOST_COMPILER __DMC_VERSION_STRING__
+
+#define BOOST_HAS_LONG_LONG
+#define BOOST_HAS_PRAGMA_ONCE
+
+#if (__DMC__ <= 0x833)
+#define BOOST_FUNCTION_SCOPE_USING_DECLARATION_BREAKS_ADL
+#define BOOST_NO_TEMPLATE_TEMPLATES
+#define BOOST_NEEDS_TOKEN_PASTING_OP_FOR_TOKENS_JUXTAPOSING
+#define BOOST_NO_ARRAY_TYPE_SPECIALIZATIONS
+#define BOOST_NO_EXPLICIT_FUNCTION_TEMPLATE_ARGUMENTS
+#endif
+#if (__DMC__ <= 0x840) || !defined(BOOST_STRICT_CONFIG)
+#define BOOST_NO_EXPLICIT_FUNCTION_TEMPLATE_ARGUMENTS
+#define BOOST_NO_MEMBER_TEMPLATE_FRIENDS
+#define BOOST_NO_OPERATORS_IN_NAMESPACE
+#define BOOST_NO_UNREACHABLE_RETURN_DETECTION
+#define BOOST_NO_SFINAE
+#define BOOST_NO_USING_TEMPLATE
+#define BOOST_FUNCTION_SCOPE_USING_DECLARATION_BREAKS_ADL
+#endif
+
+//
+// has macros:
+#if (__DMC__ >= 0x840)
+#define BOOST_HAS_DIRENT_H
+#define BOOST_HAS_STDINT_H
+#define BOOST_HAS_WINTHREADS
+#endif
+
+#if (__DMC__ >= 0x847)
+#define BOOST_HAS_EXPM1
+#define BOOST_HAS_LOG1P
+#endif
+
+//
+// Is this really the best way to detect whether the std lib is in namespace std?
+//
+#include <cstddef>
+#if !defined(__STL_IMPORT_VENDOR_CSTD) && !defined(_STLP_IMPORT_VENDOR_CSTD)
+#  define BOOST_NO_STDC_NAMESPACE
+#endif
+
+
+// check for exception handling support:
+#ifndef _CPPUNWIND
+#  define BOOST_NO_EXCEPTIONS
+#endif
+
+#if __DMC__ < 0x800
+#error "Compiler not supported or configured - please reconfigure"
+#endif
+//
+// last known and checked version is ...:
+#if (__DMC__ > 0x848)
+#  if defined(BOOST_ASSERT_CONFIG)
+#     error "Unknown compiler version - please run the configure tests and report the results"
+#  endif
+#endif