Export of internal Abseil changes.

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7c43cf69f00a02d8ed1e669cad12105de667a5ec by Abseil Team <absl-team@google.com>:

tagging benchmark tests as benchmarks

PiperOrigin-RevId: 242480880

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3d8d518cde58cddc3d651ea6394ac0722f1f3149 by Samuel Benzaquen <sbenza@google.com>:

Implement %f natively for any input.
It evaluates the input at runtime and allocates stack space accordingly.

This removes a potential fallback into snprintf, improves performance, and removes all memory allocations in this formatting path.

PiperOrigin-RevId: 242474325

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de2dc59909cd6c61960f46e647d297c17cb784b5 by Derek Mauro <dmauro@google.com>:

Add a script to test MacOS/Xcode/CMake

PiperOrigin-RevId: 242283929

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dbc90e3dec22939d99397cd8894760bfe62480ec by Derek Mauro <dmauro@google.com>:

Release macos_xcode_bazel.sh

PiperOrigin-RevId: 242153782

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92cda8a7ff7b4b974b0ae6a185cc449476336609 by Derek Mauro <dmauro@google.com>:

Add a script to test MacOS/Xcode/Bazel

PiperOrigin-RevId: 242144494
GitOrigin-RevId: 7c43cf69f00a02d8ed1e669cad12105de667a5ec
Change-Id: I3ae1f144a25a968cd4da0b2da0a3b268c81fd3bb

ci/macos_xcode_bazel.sh

@@ -0,0 +1,41 @@
+#!/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 ${ABSEIL_ROOT:-} ]; then
+  ABSEIL_ROOT="$(realpath $(dirname ${0})/..)"
+fi
+
+# Print the default compiler and Bazel versions.
+echo "---------------"
+gcc -v
+echo "---------------"
+bazel version
+echo "---------------"
+
+cd ${ABSEIL_ROOT}
+
+bazel test ... \
+  --copt=-Werror \
+  --keep_going \
+  --show_timestamps \
+  --test_env="TZDIR=${ABSEIL_ROOT}/absl/time/internal/cctz/testdata/zoneinfo" \
+  --test_output=errors \
+  --test_tag_filters=-benchmark