Add 'third_party/abseil_cpp/' from commit '768eb2ca28'

git-subtree-dir: third_party/abseil_cpp
git-subtree-mainline: ffb2ae54be
git-subtree-split: 768eb2ca28

third_party/abseil_cpp/ci/macos_xcode_cmake.sh

@@ -0,0 +1,44 @@
+#!/bin/bash
+#
+# Copyright 2019 The Abseil Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This script is invoked on Kokoro to test Abseil on macOS.
+# It is not hermetic and may break when Kokoro is updated.
+
+set -euox pipefail
+
+if [[ -z ${ABSEIL_ROOT:-} ]]; then
+  ABSEIL_ROOT="$(dirname ${0})/.."
+fi
+ABSEIL_ROOT=$(realpath ${ABSEIL_ROOT})
+
+if [[ -z ${ABSL_CMAKE_BUILD_TYPES:-} ]]; then
+  ABSL_CMAKE_BUILD_TYPES="Debug"
+fi
+
+for compilation_mode in ${ABSL_CMAKE_BUILD_TYPES}; do
+  BUILD_DIR=$(mktemp -d ${compilation_mode}.XXXXXXXX)
+  cd ${BUILD_DIR}
+
+  # TODO(absl-team): Enable -Werror once all warnings are fixed.
+  time cmake ${ABSEIL_ROOT} \
+    -GXcode \
+    -DCMAKE_BUILD_TYPE=${compilation_mode} \
+    -DCMAKE_CXX_STANDARD=11 \
+    -DABSL_USE_GOOGLETEST_HEAD=ON \
+    -DABSL_RUN_TESTS=ON
+  time cmake --build .
+  time ctest -C ${compilation_mode} --output-on-failure
+done