Update googletest to 1.18.0 and SIMDe to 0.8.2.

Googletest 1.18 asks for CMake 3.13 or newer, so configuring the tests no longer warns that CMake compatibility below 3.10 is deprecated.

Co-authored-by: Cursor <cursoragent@cursor.com>

test/googletest/ci/macos-presubmit.sh

@@ -31,6 +31,14 @@
 
 set -euox pipefail
 
+# Use Xcode 26.2
+sudo xcode-select -s /Applications/Xcode_26.2.app/Contents/Developer
+
+brew install cmake
+
+export CMAKE_BUILD_PARALLEL_LEVEL=$(sysctl -n hw.ncpu)
+export CTEST_PARALLEL_LEVEL=$(sysctl -n hw.ncpu)
+
 if [[ -z ${GTEST_ROOT:-} ]]; then
   GTEST_ROOT="$(realpath $(dirname ${0})/..)"
 fi
@@ -40,20 +48,20 @@ for cmake_off_on in OFF ON; do
   BUILD_DIR=$(mktemp -d build_dir.XXXXXXXX)
   cd ${BUILD_DIR}
   time cmake ${GTEST_ROOT} \
-    -DCMAKE_CXX_STANDARD=14 \
+    -DCMAKE_CXX_STANDARD=17 \
     -Dgtest_build_samples=ON \
     -Dgtest_build_tests=ON \
     -Dgmock_build_tests=ON \
     -Dcxx_no_exception=${cmake_off_on} \
     -Dcxx_no_rtti=${cmake_off_on}
-  time make
+  time make -j$(nproc)
   time ctest -j$(nproc) --output-on-failure
 done
 
 # Test the Bazel build
 
 # If we are running on Kokoro, check for a versioned Bazel binary.
-KOKORO_GFILE_BAZEL_BIN="bazel-5.1.1-darwin-x86_64"
+KOKORO_GFILE_BAZEL_BIN="bazel-9.1.0-darwin-x86_64"
 if [[ ${KOKORO_GFILE_DIR:-} ]] && [[ -f ${KOKORO_GFILE_DIR}/${KOKORO_GFILE_BAZEL_BIN} ]]; then
   BAZEL_BIN="${KOKORO_GFILE_DIR}/${KOKORO_GFILE_BAZEL_BIN}"
   chmod +x ${BAZEL_BIN}
@@ -61,15 +69,25 @@ else
   BAZEL_BIN="bazel"
 fi
 
+# Use Bazel Vendor mode to reduce reliance on external dependencies.
+if [[ ${KOKORO_GFILE_DIR:-} ]] && [[ -f "${KOKORO_GFILE_DIR}/distdir/googletest_vendor.tar.gz" ]]; then
+  tar -xf "${KOKORO_GFILE_DIR}/distdir/googletest_vendor.tar.gz" -C "${HOME}/"
+  BAZEL_EXTRA_ARGS="--vendor_dir=${HOME}/googletest_vendor ${BAZEL_EXTRA_ARGS:-}"
+fi
+
 cd ${GTEST_ROOT}
 for absl in 0 1; do
   ${BAZEL_BIN} test ... \
     --copt="-Wall" \
     --copt="-Werror" \
-    --cxxopt="-std=c++14" \
+    --copt="-Wundef" \
+    --cxxopt="-std=c++17" \
     --define="absl=${absl}" \
+    --enable_bzlmod=true \
     --features=external_include_paths \
     --keep_going \
+    --per_file_copt="external/.*@-w" \
     --show_timestamps \
-    --test_output=errors
+    --test_output=errors \
+    ${BAZEL_EXTRA_ARGS:-}
 done