Author: Holger Jaekel <holger.jaekel@gmx.de>
Summary: ignore googletest, glog, and benchmark from the third-party folder
----

--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -16,7 +16,7 @@
 # C++ standard can be overridden when this is used as a sub-project.
 if(NOT CMAKE_CXX_STANDARD)
   # This project requires C++11.
-  set(CMAKE_CXX_STANDARD 11)
+  set(CMAKE_CXX_STANDARD 14)
   set(CMAKE_CXX_STANDARD_REQUIRED ON)
   set(CMAKE_CXX_EXTENSIONS OFF)
 endif(NOT CMAKE_CXX_STANDARD)
@@ -187,26 +187,8 @@
   # CPU cycles on the CI.
   set(BUILD_TESTING_SAVED "${BUILD_TESTING}")
   set(BUILD_TESTING OFF CACHE BOOL "" FORCE)
-  add_subdirectory("third_party/glog" EXCLUDE_FROM_ALL)
   set(BUILD_TESTING "${BUILD_TESTING_SAVED}" CACHE BOOL "" FORCE)
 
-  # glog triggers deprecation warnings on OSX.
-  # https://github.com/google/glog/issues/185
-  if(CRC32C_HAVE_NO_DEPRECATED)
-    set_property(TARGET glog APPEND PROPERTY COMPILE_OPTIONS -Wno-deprecated)
-  endif(CRC32C_HAVE_NO_DEPRECATED)
-
-  # glog triggers sign comparison warnings on gcc.
-  if(CRC32C_HAVE_NO_SIGN_COMPARE)
-    set_property(TARGET glog APPEND PROPERTY COMPILE_OPTIONS -Wno-sign-compare)
-  endif(CRC32C_HAVE_NO_SIGN_COMPARE)
-
-  # glog triggers unused parameter warnings on clang.
-  if(CRC32C_HAVE_NO_UNUSED_PARAMETER)
-    set_property(TARGET glog
-                 APPEND PROPERTY COMPILE_OPTIONS -Wno-unused-parameter)
-  endif(CRC32C_HAVE_NO_UNUSED_PARAMETER)
-
   set(CRC32C_TESTS_BUILT_WITH_GLOG 1)
 endif(CRC32C_USE_GLOG)
 
@@ -314,17 +296,6 @@
   set(install_gtest OFF)
   set(install_gmock OFF)
 
-  # This project is tested using GoogleTest.
-  add_subdirectory("third_party/googletest")
-
-  # GoogleTest triggers a missing field initializers warning.
-  if(CRC32C_HAVE_NO_MISSING_FIELD_INITIALIZERS)
-    set_property(TARGET gtest
-        APPEND PROPERTY COMPILE_OPTIONS -Wno-missing-field-initializers)
-    set_property(TARGET gmock
-        APPEND PROPERTY COMPILE_OPTIONS -Wno-missing-field-initializers)
-  endif(CRC32C_HAVE_NO_MISSING_FIELD_INITIALIZERS)
-
   add_executable(crc32c_tests "")
   target_sources(crc32c_tests
     PRIVATE
@@ -385,7 +356,6 @@
   # This project uses Google benchmark for benchmarking.
   set(BENCHMARK_ENABLE_TESTING OFF CACHE BOOL "" FORCE)
   set(BENCHMARK_ENABLE_EXCEPTIONS OFF CACHE BOOL "" FORCE)
-  add_subdirectory("third_party/benchmark")
   target_link_libraries(crc32c_bench benchmark)
 
   if(CRC32C_USE_GLOG)