Add gmock into our dependencies.

third_party/boost/boost/config/select_compiler_config.hpp

Index: third_party/boost/boost/config/select_compiler_config.hpp
diff --git a/third_party/boost/boost/config/select_compiler_config.hpp b/third_party/boost/boost/config/select_compiler_config.hpp
new file mode 100644
index 0000000000000000000000000000000000000000..8d8db9034adbaf8b87747fe81a30913baa2e4bdf
--- /dev/null
+++ b/third_party/boost/boost/config/select_compiler_config.hpp
@@ -0,0 +1,115 @@
+//  Boost compiler configuration selection header file
+
+//  (C) Copyright John Maddock 2001 - 2003. 
+//  (C) Copyright Martin Wille 2003.
+//  (C) Copyright Guillaume Melquiond 2003.
+//
+//  Distributed under 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)
+
+//  See http://www.boost.org/ for most recent version.
+
+
+// one identification macro for each of the
+// compilers we support:
+
+#   define BOOST_CXX_GCCXML   0
+#   define BOOST_CXX_COMO     0
+#   define BOOST_CXX_DMC      0
+#   define BOOST_CXX_INTEL    0
+#   define BOOST_CXX_GNUC     0
+#   define BOOST_CXX_KCC      0
+#   define BOOST_CXX_SGI      0
+#   define BOOST_CXX_TRU64    0
+#   define BOOST_CXX_GHS      0
+#   define BOOST_CXX_BORLAND  0
+#   define BOOST_CXX_CW       0
+#   define BOOST_CXX_SUNPRO   0
+#   define BOOST_CXX_HPACC    0
+#   define BOOST_CXX_MPW      0
+#   define BOOST_CXX_IBMCPP   0
+#   define BOOST_CXX_MSVC     0
+#   define BOOST_CXX_PGI      0
+
+
+// locate which compiler we are using and define
+// BOOST_COMPILER_CONFIG as needed: 
+
+#if defined(__GCCXML__)
+// GCC-XML emulates other compilers, it has to appear first here!
+#   define BOOST_COMPILER_CONFIG "boost/config/compiler/gcc_xml.hpp"
+
+#elif defined __COMO__
+//  Comeau C++
+#   define BOOST_COMPILER_CONFIG "boost/config/compiler/comeau.hpp"
+
+#elif defined __DMC__
+//  Digital Mars C++
+#   define BOOST_COMPILER_CONFIG "boost/config/compiler/digitalmars.hpp"
+
+#elif defined(__INTEL_COMPILER) || defined(__ICL) || defined(__ICC) || defined(__ECC)
+//  Intel
+#   define BOOST_COMPILER_CONFIG "boost/config/compiler/intel.hpp"
+
+# elif defined __GNUC__
+//  GNU C++:
+#   define BOOST_COMPILER_CONFIG "boost/config/compiler/gcc.hpp"
+
+#elif defined __KCC
+//  Kai C++
+#   define BOOST_COMPILER_CONFIG "boost/config/compiler/kai.hpp"
+
+#elif defined __sgi
+//  SGI MIPSpro C++
+#   define BOOST_COMPILER_CONFIG "boost/config/compiler/sgi_mipspro.hpp"
+
+#elif defined __DECCXX
+//  Compaq Tru64 Unix cxx
+#   define BOOST_COMPILER_CONFIG "boost/config/compiler/compaq_cxx.hpp"
+
+#elif defined __ghs
+//  Greenhills C++
+#   define BOOST_COMPILER_CONFIG "boost/config/compiler/greenhills.hpp"
+
+#elif defined __BORLANDC__
+//  Borland
+#   define BOOST_COMPILER_CONFIG "boost/config/compiler/borland.hpp"
+
+#elif defined  __MWERKS__
+//  Metrowerks CodeWarrior
+#   define BOOST_COMPILER_CONFIG "boost/config/compiler/metrowerks.hpp"
+
+#elif defined  __SUNPRO_CC
+//  Sun Workshop Compiler C++
+#   define BOOST_COMPILER_CONFIG "boost/config/compiler/sunpro_cc.hpp"
+
+#elif defined __HP_aCC
+//  HP aCC
+#   define BOOST_COMPILER_CONFIG "boost/config/compiler/hp_acc.hpp"
+
+#elif defined(__MRC__) || defined(__SC__)
+//  MPW MrCpp or SCpp
+#   define BOOST_COMPILER_CONFIG "boost/config/compiler/mpw.hpp"
+
+#elif defined(__IBMCPP__)
+//  IBM Visual Age
+#   define BOOST_COMPILER_CONFIG "boost/config/compiler/vacpp.hpp"
+
+#elif defined(__PGI)
+//  Portland Group Inc.
+#   define BOOST_COMPILER_CONFIG "boost/config/compiler/pgi.hpp"
+
+#elif defined _MSC_VER
+//  Microsoft Visual C++
+//
+//  Must remain the last #elif since some other vendors (Metrowerks, for
+//  example) also #define _MSC_VER
+#   define BOOST_COMPILER_CONFIG "boost/config/compiler/visualc.hpp"
+
+#elif defined (BOOST_ASSERT_CONFIG)
+// this must come last - generate an error if we don't
+// recognise the compiler:
+#  error "Unknown compiler - please configure (http://www.boost.org/libs/config/config.htm#configuring) and report the results to the main boost mailing list (http://www.boost.org/more/mailing_lists.htm#main)"
+
+#endif