Add a fused version of gtest.

CMakeLists.txt

@@ -39,18 +39,17 @@ add_test(compile-test ${CMAKE_CTEST_COMMAND}
 # See the Google Test FAQ "Why is it not recommended to install a
 # pre-compiled copy of Google Test (for example, into /usr/local)?"
 # at http://code.google.com/p/googletest/wiki/FAQ for more details.
-if (EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/gtest/CMakeLists.txt)
-  option(
-    gtest_force_shared_crt
-    "Use shared (DLL) run-time lib even when Google Test is built as static lib."
-    ON)
+
+include_directories(.)
+
 if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
   add_definitions(-DGTEST_USE_OWN_TR1_TUPLE=1)
 endif ()
 
-  add_subdirectory(gtest)
-  include_directories(gtest/include)
-  link_directories(${CMAKE_CURRENT_BINARY_DIR}/gtest)
+add_library(gtest gtest/gtest-all.cc)
+
+find_package(Threads)
+target_link_libraries(gtest ${CMAKE_THREAD_LIBS_INIT})
 
 add_executable(format-test format-test.cc)
 target_link_libraries(format-test format gtest)
@@ -62,7 +61,6 @@ if (EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/gtest/CMakeLists.txt)
 if (HAVE_STD_CPP11_FLAG)
   set_target_properties(format-test PROPERTIES COMPILE_FLAGS "-std=c++11")
 endif ()
-endif ()
 
 find_library(PROFILER_LIB profiler)
 find_path(PROFILER_INCLUDE_DIR gperftools/profiler.h)