Upgrade third_party/googletest submodule to current main branch (#10393)

* Upgrade third_party/googletest submodule to current main branch

We can finally do this upgrade now that we have dropped our autotools
build. Googletest recommends living at head, so let's go straight to the
most recent commit on main. For some reason the googletest archive is
not present in the Bazel build mirror, so I removed that entry and just
left the GitHub download link in our WORKSPACE file.

Googletest now requires C++14, so I updated all the C++11 flags I could
find to C++14 instead. I added a .bazelrc file to add -std=c++14 for all
our Bazel builds.

* Delete the empty //src/google/protobuf:protobuf_test target

* Avoid building C++ unit tests in aarch64 jobs for Python and Ruby

.bazelrc

@@ -0,0 +1 @@
+build --cxxopt=-std=c++14

CMakeLists.txt

@@ -32,11 +32,11 @@ if(protobuf_DEPRECATED_CMAKE_SUBDIRECTORY_USAGE)
   get_filename_component(protobuf_SOURCE_DIR ${protobuf_SOURCE_DIR} DIRECTORY)
 endif()
 
-# Add c++11 flags
+# Add c++14 flags
 if (CYGWIN)
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++11")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++14")
 else()
-  set(CMAKE_CXX_STANDARD 11)
+  set(CMAKE_CXX_STANDARD 14)
   set(CMAKE_CXX_STANDARD_REQUIRED ON)
   set(CMAKE_CXX_EXTENSIONS OFF)
 endif()
@@ -187,7 +187,7 @@ set(protobuf_LINK_LIBATOMIC false)
 if (NOT MSVC)
   include(CheckCXXSourceCompiles)
   set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
-  set(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS} -std=c++11)
+  set(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS} -std=c++14)
   check_cxx_source_compiles("
     #include <atomic>
     int main() {

WORKSPACE

@@ -9,11 +9,10 @@ local_repository(
 
 http_archive(
     name = "com_google_googletest",
-    sha256 = "9dc9157a9a1551ec7a7e43daea9a694a0bb5fb8bec81235d8a1e6ef64c716dcb",
-    strip_prefix = "googletest-release-1.10.0",
+    sha256 = "ea54c9845568cb31c03f2eddc7a40f7f83912d04ab977ff50ec33278119548dd",
+    strip_prefix = "googletest-4c9a3bb62bf3ba1f1010bf96f9c8ed767b363774",
     urls = [
-        "https://mirror.bazel.build/github.com/google/googletest/archive/release-1.10.0.tar.gz",
-        "https://github.com/google/googletest/archive/release-1.10.0.tar.gz",
+        "https://github.com/google/googletest/archive/4c9a3bb62bf3ba1f1010bf96f9c8ed767b363774.tar.gz",
     ],
 )
 

examples/Makefile

@@ -41,11 +41,11 @@ protoc_middleman_dart: addressbook.proto
 
 add_person_cpp: add_person.cc protoc_middleman
 	pkg-config --cflags protobuf  # fails if protobuf is not installed
-	c++ -std=c++11 add_person.cc addressbook.pb.cc -o add_person_cpp `pkg-config --cflags --libs protobuf`
+	c++ -std=c++14 add_person.cc addressbook.pb.cc -o add_person_cpp `pkg-config --cflags --libs protobuf`
 
 list_people_cpp: list_people.cc protoc_middleman
 	pkg-config --cflags protobuf  # fails if protobuf is not installed
-	c++ -std=c++11 list_people.cc addressbook.pb.cc -o list_people_cpp `pkg-config --cflags --libs protobuf`
+	c++ -std=c++14 list_people.cc addressbook.pb.cc -o list_people_cpp `pkg-config --cflags --libs protobuf`
 
 add_person_dart: add_person.dart protoc_middleman_dart
 

kokoro/linux/aarch64/protoc_crosscompile_aarch64.sh

@@ -4,5 +4,5 @@
 
 set -ex
 
-cmake -DCMAKE_POSITION_INDEPENDENT_CODE=ON -Dprotobuf_WITH_ZLIB=0 .
+cmake -DCMAKE_POSITION_INDEPENDENT_CODE=ON -Dprotobuf_WITH_ZLIB=0 -Dprotobuf_BUILD_TESTS=OFF .
 make -j8

kokoro/linux/aarch64/python_crosscompile_aarch64.sh

@@ -12,7 +12,7 @@ PYTHON="/opt/python/cp38-cp38/bin/python"
 git submodule update --init --recursive
 
 # Build protoc and libprotobuf
-cmake -DCMAKE_POSITION_INDEPENDENT_CODE=ON -Dprotobuf_WITH_ZLIB=0 .
+cmake -DCMAKE_POSITION_INDEPENDENT_CODE=ON -Dprotobuf_WITH_ZLIB=0 -Dprotobuf_BUILD_TESTS=OFF .
 make -j8
 
 # create a simple shell wrapper that runs crosscompiled protoc under qemu

python/setup.py

@@ -331,7 +331,7 @@ def HasLibraryDirsOpt():
       extra_compile_args.append('-Wno-invalid-offsetof')
       extra_compile_args.append('-Wno-sign-compare')
       extra_compile_args.append('-Wno-unused-variable')
-      extra_compile_args.append('-std=c++11')
+      extra_compile_args.append('-std=c++14')
 
     if sys.platform == 'darwin':
       extra_compile_args.append('-Wno-shorten-64-to-32')

src/google/protobuf/BUILD.bazel

@@ -1073,16 +1073,6 @@ cc_test(
     ],
 )
 
-# Legacy target: all test sources used to be part of this rule. It is
-# still kept around for now.
-cc_test(
-    name = "protobuf_test",
-    srcs = [],
-    deps = [
-        "@com_google_googletest//:gtest_main",
-    ],
-)
-
 ################################################################################
 # Helper targets for Kotlin tests
 ################################################################################