Squashed 'external/cli11/' content from commit 13becadd

git-subtree-dir: external/cli11
git-subtree-split: 13becaddb657eacd090537719a669d66d393b8b2

.appveyor.yml

+branches:
+  only:
+    - master
+
+install:
+  - git submodule update --init --recursive
+  - set PATH=C:\Python36;%PATH%
+  - cmake --version
+  - pip install conan
+  - conan user
+  - conan --version
+
+build_script:
+  - mkdir build
+  - cd build
+  - ps: cmake .. -DCLI11_WARNINGS_AS_ERRORS=ON -DCLI11_SINGLE_FILE_TESTS=ON -DCMAKE_BUILD_TYPE=Debug -DCMAKE_GENERATOR="Visual Studio 14 2015"
+  - ps: cmake --build .
+  - cd ..
+  - conan create . CLIUtils/CLI11
+
+test_script:
+  - cd build
+  - ps: ctest --output-on-failure -C Debug
+
+notifications:
+  - provider: Webhook
+    url: https://webhooks.gitter.im/e/0185e91c5d989a476d7b
+    on_build_success: false
+    on_build_failure: true
+    on_build_status_changed: true

.ci/azure-build.yml

+steps:
+
+- task: CMake@1
+  inputs:
+    cmakeArgs: .. -DCLI11_WARNINGS_AS_ERRORS=ON -DCLI11_SINGLE_FILE=$(cli11.single) -DCLI11_CXX_STD=$(cli11.std) -DCLI11_SINGLE_FILE_TESTS=$(cli11.single) -DCMAKE_BUILD_TYPE=$(cli11.build_type) $(cli11.options)
+  displayName: 'Configure'
+
+- script: cmake --build .
+  displayName: 'Build'
+  workingDirectory: build
+

.ci/azure-cmake.yml

+steps:
+
+# Note that silkeh/clang does not include ca-certificates, so check the shasum for verification
+- bash: |
+    wget --no-check-certificate "https://cmake.org/files/v3.14/cmake-3.14.3-Linux-x86_64.tar.gz"
+    echo "29faa62fb3a0b6323caa3d9557e1a5f1205614c0d4c5c2a9917f16a74f7eff68  cmake-3.14.3-Linux-x86_64.tar.gz" | shasum -sca 256
+  displayName: Download CMake
+
+- task: ExtractFiles@1
+  inputs:
+    archiveFilePatterns: 'cmake*.tar.gz'
+    destinationFolder: 'cmake_program'
+    displayName: Extract CMake
+
+- bash: echo "##vso[task.prependpath]$(Build.SourcesDirectory)/cmake_program/cmake-3.14.3-Linux-x86_64/bin"
+  displayName: Add CMake to PATH

.ci/azure-test.yml

+steps:
+
+- script: ctest --output-on-failure -C $(cli11.build_type) -T test
+  displayName: 'Test'
+  workingDirectory: build
+
+- task: PublishTestResults@2
+  inputs:
+    testResultsFormat: 'cTest'
+    testResultsFiles: '**/Test.xml'
+
+

.ci/build_docs.sh

+#!/bin/sh
+################################################################################
+# Title         : generateDocumentationAndDeploy.sh
+# Date created  : 2016/02/22
+# Notes         :
+# Author        : Jeroen de Bruijn
+# Preconditions:
+# - Packages doxygen doxygen-doc doxygen-latex doxygen-gui graphviz
+#   must be installed.
+# - Doxygen configuration file must have the destination directory empty and
+#   source code directory with a $(TRAVIS_BUILD_DIR) prefix.
+# - An gh-pages branch should already exist. See below for mor info on hoe to
+#   create a gh-pages branch.
+#
+# Required global variables:
+# - TRAVIS_BUILD_NUMBER : The number of the current build.
+# - TRAVIS_COMMIT       : The commit that the current build is testing.
+# - DOXYFILE            : The Doxygen configuration file.
+# - TRAVIS_REPO_SLUG    : The username / reponame for the repository.
+# - GH_REPO_TOKEN       : Secure token to the github repository.
+#
+# For information on how to encrypt variables for Travis CI please go to
+# https://docs.travis-ci.com/user/environment-variables/#Encrypted-Variables
+# or https://gist.github.com/vidavidorra/7ed6166a46c537d3cbd2
+# For information on how to create a clean gh-pages branch from the master
+# branch, please go to https://gist.github.com/vidavidorra/846a2fc7dd51f4fe56a0
+#
+# This script will generate Doxygen documentation and push the documentation to
+# the gh-pages branch of a repository specified by GH_REPO_REF.
+# Before this script is used there should already be a gh-pages branch in the
+# repository.
+#
+################################################################################
+
+################################################################################
+##### Setup this script and get the current gh-pages branch.               #####
+echo 'Setting up the script...'
+# Exit with nonzero exit code if anything fails
+set -e
+
+GH_REPO_ORG=$(echo $TRAVIS_REPO_SLUG | cut -d "/" -f 1)
+GH_REPO_NAME=$(echo $TRAVIS_REPO_SLUG | cut -d "/" -f 2)
+GH_REPO_REF="github.com/$GH_REPO_ORG/$GH_REPO_NAME.git"
+
+# Create a clean working directory for this script.
+# Get the current gh-pages branch
+cd docs
+git clone -b gh-pages https://git@$GH_REPO_REF html
+cd html
+
+##### Configure git.
+# Set the push default to simple i.e. push only the current branch.
+git config --global push.default simple
+# Pretend to be an user called Travis CI.
+git config user.name "Travis CI"
+git config user.email "travis@travis-ci.org"
+
+# Remove everything currently in the gh-pages branch.
+# GitHub is smart enough to know which files have changed and which files have
+# stayed the same and will only update the changed files. So the gh-pages branch
+# can be safely cleaned, and it is sure that everything pushed later is the new
+# documentation.
+rm -rf *
+
+# Need to create a .nojekyll file to allow filenames starting with an underscore
+# to be seen on the gh-pages site. Therefore creating an empty .nojekyll file.
+# Presumably this is only needed when the SHORT_NAMES option in Doxygen is set
+# to NO, which it is by default. So creating the file just in case.
+echo "" > .nojekyll
+
+################################################################################
+##### Generate the Doxygen code documentation and log the output.          #####
+echo 'Generating Doxygen code documentation...'
+# Redirect both stderr and stdout to the log file AND the console.
+cd ..
+doxygen $DOXYFILE 2>&1 | tee doxygen.log
+
+################################################################################
+##### Upload the documentation to the gh-pages branch of the repository.   #####
+# Only upload if Doxygen successfully created the documentation.
+# Check this by verifying that the html directory and the file html/index.html
+# both exist. This is a good indication that Doxygen did it's work.
+if [ -d "html" ] && [ -f "html/index.html" ]; then
+
+    cd html
+    echo 'Uploading documentation to the gh-pages branch...'
+    # Add everything in this directory (the Doxygen code documentation) to the
+    # gh-pages branch.
+    # GitHub is smart enough to know which files have changed and which files have
+    # stayed the same and will only update the changed files.
+    git add --all
+
+    # Commit the added files with a title and description containing the Travis CI
+    # build number and the GitHub commit reference that issued this build.
+    git commit -m "Deploy code docs to GitHub Pages Travis build: ${TRAVIS_BUILD_NUMBER}" -m "Commit: ${TRAVIS_COMMIT}"
+
+    # Force push to the remote gh-pages branch.
+    # The ouput is redirected to /dev/null to hide any sensitive credential data
+    # that might otherwise be exposed.
+    git push --force "https://${GH_REPO_TOKEN}@${GH_REPO_REF}" > /dev/null 2>&1
+else
+    echo '' >&2
+    echo 'Warning: No documentation (html) files have been found!' >&2
+    echo 'Warning: Not going to push the documentation to GitHub!' >&2
+    exit 1
+fi

.ci/build_doxygen.sh

+#!/bin/env sh
+# (Source me)
+
+set -evx
+
+DOXYGEN_URL="http://doxygen.nl/files/doxygen-1.8.15.src.tar.gz"
+cd "${DEPS_DIR}"
+
+if [[ ! -f "${DEPS_DIR}/doxygen/build/bin/doxygen" ]] ; then
+  echo "Downloading Doxygen"
+  mkdir -p doxygen
+  travis_retry wget --no-check-certificate --quiet -O - "${DOXYGEN_URL}" | tar --strip-components=1 -xz -C doxygen
+  cd doxygen
+  mkdir -p build
+  cd build
+  cmake ..
+  make -j2
+fi
+
+export PATH="${DEPS_DIR}/doxygen/build/bin:${PATH}"
+
+cd "${TRAVIS_BUILD_DIR}"
+
+set +evx
+

.ci/build_lcov.sh

+#!/bin/env sh
+# (Source me)
+set -evx
+
+LCOV_URL="http://ftp.de.debian.org/debian/pool/main/l/lcov/lcov_1.13.orig.tar.gz"
+cd "${DEPS_DIR}"
+
+if [[ ! -f "${DEPS_DIR}/lcov/bin/lcov" ]] ; then
+  echo "Downloading lcov"
+  mkdir -p lcov
+  travis_retry wget --no-check-certificate --quiet -O - "${LCOV_URL}" | tar --strip-components=1 -xz -C lcov
+fi
+
+export PATH="${DEPS_DIR}/lcov/bin:${PATH}"
+cd "${TRAVIS_BUILD_DIR}"
+
+set +evx

.ci/make_and_test.sh

+#!/usr/bin/env bash
+echo -en "travis_fold:start:script.build\\r"
+echo "Building..."
+STD=$1
+shift
+set -evx
+
+
+mkdir -p build
+cd build
+cmake .. -DCLI11_WARNINGS_AS_ERRORS=ON -DCLI11_SINGLE_FILE=ON -DCLI11_CXX_STD=$STD -DCLI11_SINGLE_FILE_TESTS=ON -DCMAKE_BUILD_TYPE=Debug -DCMAKE_CXX_COMPILER_LAUNCHER=ccache $@
+cmake --build . -- -j2
+
+set +evx
+echo -en "travis_fold:end:script.build\\r"
+echo -en "travis_fold:start:script.test\\r"
+echo "Testing..."
+set -evx
+
+ctest --output-on-failure
+
+set +evx
+echo -en "travis_fold:end:script.test\\r"

.ci/run_codecov.sh

+#!/usr/bin/env bash
+
+echo -en "travis_fold:start:script.build\\r"
+echo "Building..."
+set -evx
+
+cd ${TRAVIS_BUILD_DIR}
+mkdir -p build
+cd build
+cmake .. -DCLI11_SINGLE_FILE_TESTS=OFF -DCLI11_EXAMPLES=OFF -DCMAKE_BUILD_TYPE=Coverage
+cmake --build . -- -j2
+cmake --build . --target CLI11_coverage
+
+set +evx
+echo -en "travis_fold:end:script.build\\r"
+echo -en "travis_fold:start:script.lcov\\r"
+echo "Capturing and uploading LCov..."
+set -evx
+
+lcov --directory . --capture --output-file coverage.info # capture coverage info
+lcov --remove coverage.info '*/tests/*' '*/examples/*' '*gtest*' '*gmock*' '/usr/*' --output-file coverage.info # filter out system
+lcov --list coverage.info #debug info
+# Uploading report to CodeCov
+bash <(curl -s https://codecov.io/bash) || echo "Codecov did not collect coverage reports"
+
+set +evx
+echo -en "travis_fold:end:script.lcov\\r"

.clang-format

+Language:        Cpp
+BasedOnStyle:  LLVM
+# AccessModifierOffset: -2
+# AlignAfterOpenBracket: Align
+# AlignConsecutiveAssignments: false
+# AlignConsecutiveDeclarations: false
+# AlignEscapedNewlinesLeft: false
+# AlignOperands:   true
+# AlignTrailingComments: true
+# AllowAllParametersOfDeclarationOnNextLine: true
+# AllowShortBlocksOnASingleLine: false
+# AllowShortCaseLabelsOnASingleLine: false
+# AllowShortFunctionsOnASingleLine: All
+# AllowShortIfStatementsOnASingleLine: false
+# AllowShortLoopsOnASingleLine: false
+# AlwaysBreakAfterDefinitionReturnType: None
+# AlwaysBreakAfterReturnType: None
+# AlwaysBreakBeforeMultilineStrings: false
+# AlwaysBreakTemplateDeclarations: false
+BinPackArguments: false
+BinPackParameters: false
+# BraceWrapping:   
+#   AfterClass:      false
+#   AfterControlStatement: false
+#   AfterEnum:       false
+#   AfterFunction:   false
+#   AfterNamespace:  false
+#   AfterObjCDeclaration: false
+#   AfterStruct:     false
+#   AfterUnion:      false
+#   BeforeCatch:     false
+#   BeforeElse:      false
+#   IndentBraces:    false
+# BreakBeforeBinaryOperators: None
+# BreakBeforeBraces: Attach
+# BreakBeforeTernaryOperators: true
+# BreakConstructorInitializersBeforeComma: false
+# BreakAfterJavaFieldAnnotations: false
+# BreakStringLiterals: true
+ColumnLimit:     120
+# CommentPragmas:  '^ IWYU pragma:'
+# ConstructorInitializerAllOnOneLineOrOnePerLine: false
+# ConstructorInitializerIndentWidth: 4
+# ContinuationIndentWidth: 4
+# Cpp11BracedListStyle: true
+# DerivePointerAlignment: false
+# DisableFormat:   false
+# ExperimentalAutoDetectBinPacking: false
+# ForEachMacros:   [ foreach, Q_FOREACH, BOOST_FOREACH ]
+# IncludeIsMainRegex: '$'
+# IndentCaseLabels: false
+IndentWidth:     4
+# IndentWrappedFunctionNames: false
+# JavaScriptQuotes: Leave
+# JavaScriptWrapImports: true
+# KeepEmptyLinesAtTheStartOfBlocks: true
+# MacroBlockBegin: ''
+# MacroBlockEnd:   ''
+# MaxEmptyLinesToKeep: 1
+# NamespaceIndentation: None
+# ObjCBlockIndentWidth: 2
+# ObjCSpaceAfterProperty: false
+# ObjCSpaceBeforeProtocolList: true
+# PenaltyBreakBeforeFirstCallParameter: 19
+# PenaltyBreakComment: 300
+# PenaltyBreakFirstLessLess: 120
+# PenaltyBreakString: 1000
+# PenaltyExcessCharacter: 1000000
+# PenaltyReturnTypeOnItsOwnLine: 60
+# PointerAlignment: Right
+# ReflowComments:  true
+SortIncludes:    false
+# SpaceAfterCStyleCast: false
+# SpaceAfterTemplateKeyword: true
+# SpaceBeforeAssignmentOperators: true
+SpaceBeforeParens: Never
+# SpaceInEmptyParentheses: false
+# SpacesBeforeTrailingComments: 1
+# SpacesInAngles:  false
+# SpacesInContainerLiterals: true
+# SpacesInCStyleCastParentheses: false
+# SpacesInParentheses: false
+# SpacesInSquareBrackets: false
+Standard:        Cpp11
+TabWidth:        4
+UseTab:          Never

.clang-tidy

+#Checks: '*,-clang-analyzer-alpha.*'
+#Checks: '-*,google-readability-casting,llvm-namespace-comment,performance-unnecessary-value-param,llvm-include-order,misc-throw-by-value-catch-by-reference,readability-container-size-empty,google-runtime-references,modernize*'
+Checks: '-*,llvm-namespace-comment,readability-container-size-empty,misc-throw-by-value-catch-by-reference,modernize*,google-readability-casting'
+HeaderFilterRegex: '.*hpp'
+CheckOptions:
+- key:             readability-braces-around-statements.ShortStatementLines
+  value:           '1'
+

.codecov.yml

+
+ignore:
+  - "tests"
+  - "examples"

.editorconfig

+root = true
+
+[*]
+indent_style = space
+indent_size = 4
+insert_final_newline = true
+end_of_line = lf
+trim_trailing_whitespace = true
+
+[*.yml]
+indent_size = 2

.github/CONTRIBUTING.md

+Thanks for considering to write a Pull Request (PR) for CLI11! Here are a few guidelines to get you started:
+
+Make sure you are comfortable with the license; all contributions are licensed under the original license.
+
+## Adding functionality
+Make sure any new functions you add are are:
+
+* Documented by `///` documentation for Doxygen
+* Mentioned in the instructions in the README, though brief mentions are okay
+* Explained in your PR (or previously explained in an Issue mentioned in the PR)
+* Completely covered by tests
+
+In general, make sure the addition is well thought out and does not increase the complexity of CLI11 needlessly.
+
+## Things you should know:
+
+* Once you make the PR, tests will run to make sure your code works on all supported platforms
+* The test coverage is also measured, and that should remain 100%
+* Formatting should be done with clang-format, otherwise the format check will not pass. However, it is trivial to apply this to your PR, so don't worry about this check. If you do have clang-format, just run `scripts/check_style.sh`
+* Everything must pass clang-tidy as well, run with `-DCLANG_TIDY_FIX-ON` (make sure you use a single threaded build process!)
+
+Note that the style check is really just:
+
+```bash
+git ls-files -- '.cpp' '.hpp' | xargs clang-format -i -style=file
+```
+
+And, if you want to always use it, feel free to install the git hook provided in scripts.
+
+## For developers releasing to Conan.io
+
+This is now done by the CI system on tagged releases. Previously, the steps to make a Conan.io release were:
+
+```bash
+conan remove '*' # optional, I like to be clean
+conan create . cliutils/stable
+conan upload "*" -r cli11 --all
+```
+
+Here I've assumed that the remote is `cli11`.

.gitignore

+a.out*
+*.swp
+/*build*
+/test_package/build
+/Makefile
+/CMakeFiles/*
+/cmake_install.cmake

.gitmodules

+[submodule "extern/googletest"]
+	path = extern/googletest
+	url = ../../google/googletest.git
+[submodule "extern/sanitizers"]
+	path = extern/sanitizers
+	url = ../../arsenm/sanitizers-cmake
+[submodule "extern/json"]
+	path = extern/json
+	url = ../../nlohmann/json.git

.travis.yml

+language: cpp
+dist: trusty
+
+# Exclude ghpages,
+# but even better, don't build branch and PR, just PR
+# Include tags starting with v and a digit
+branches:
+  only:
+  - master
+  - /^v\d/
+
+cache:
+  apt: true
+  directories:
+  - "${TRAVIS_BUILD_DIR}/deps/doxygen"
+
+matrix:
+  include:
+    # Default clang
+  - compiler: clang
+    script:
+    - .ci/make_and_test.sh 11
+    - .ci/make_and_test.sh 14
+    - .ci/make_and_test.sh 17
+
+    # Docs and clang 3.5
+  - compiler: clang
+    env:
+    - DEPLOY_MAT=yes
+    addons:
+      apt:
+        packages:
+        - clang-3.5
+    install:
+    - export CC=clang-3.5
+    - export CXX=clang++-3.5
+    script:
+    - .ci/make_and_test.sh 11
+    after_success:
+    - export DOXYFILE=$TRAVIS_BUILD_DIR/docs/Doxyfile
+    - export DEPS_DIR="${TRAVIS_BUILD_DIR}/deps"
+    - |
+      if [ "${TRAVIS_BRANCH}" == "master" ] && [ "${TRAVIS_PULL_REQUEST}" == "false" ]
+      then
+        . .ci/build_doxygen.sh
+        .ci/build_docs.sh
+      fi
+
+    # GCC 7 and coverage (8 does not support lcov, wait till 9 and new lcov)
+  - compiler: gcc
+    env:
+    - GCC_VER=7
+    addons:
+      apt:
+        sources:
+        - ubuntu-toolchain-r-test
+        packages:
+        - g++-7
+        - curl
+        - lcov
+    install:
+    - export CC=gcc-7
+    - export CXX=g++-7
+    - DEPS_DIR="${TRAVIS_BUILD_DIR}/deps"
+    - cd $TRAVIS_BUILD_DIR
+    - ". .ci/build_lcov.sh"
+    - ".ci/run_codecov.sh"
+    script:
+    - .ci/make_and_test.sh 11 -DCLI11_EXAMPLE_JSON=ON
+    - .ci/make_and_test.sh 14 -DCLI11_EXAMPLE_JSON=ON
+    - .ci/make_and_test.sh 17 -DCLI11_EXAMPLE_JSON=ON
+
+    # GCC 4.7 and Conan
+  - compiler: gcc
+    env:
+    - GCC_VER=4.7
+    addons:
+      apt:
+        packages:
+        - g++-4.7
+    install:
+    - export CC=gcc-4.7
+    - export CXX=g++-4.7
+    - python -m pip install --user conan
+    - conan user
+    script:
+    - .ci/make_and_test.sh 11
+    after_success:
+    - conan create . cliutils/stable
+    - |
+      if [ "${TRAVIS_TAG}" ]
+      then
+        conan remote add origin https://api.bintray.com/conan/cliutils/CLI11
+        conan user -p ${BINFROG_API_KEY} -r origin henryiii
+        conan upload "*" -c -r origin --all
+      fi
+
+    # GCC 4.8
+  - compiler: gcc
+    env:
+    - GCC_VER=4.8
+    addons:
+      apt:
+        packages:
+        - g++-4.8
+    install:
+    - export CC=gcc-4.8
+    - export CXX=g++-4.8
+    script:
+    - .ci/make_and_test.sh 11
+
+install: skip
+
+script:
+- .ci/make_and_test.sh 11
+- .ci/make_and_test.sh 14
+
+
+deploy:
+  provider: releases
+  api_key:
+    secure: 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
+  skip_cleanup: true
+  file: build/include/CLI11.hpp
+  on:
+    repo: CLIUtils/CLI11
+    tags: true
+    condition: "$DEPLOY_MAT = yes"
+notifications:
+  webhooks:
+    urls:
+    - https://webhooks.gitter.im/e/bbdb3befce4c00448d24
+    on_success: change
+    on_failure: always
+    on_start: never
+env:
+  global:
+  - secure: cY0OI609iTAxLRYuYQnNMi+H6n0dBwioTAoFXGGRTnngw2V9om3UmY5eUu4HQEQsQZovHdYpNhlSgRmdwQ4UqSp3FGyrwobf0kzacV4bVnMDeXDmHt8RzE5wP/LwDd8elNF6RRYjElY99f0k0FyXVd0fIvuVkGKQECNLOtEk0jQo+4YTh7dhuCxRhBYgTbNiRL6UJynfrcK0YN+DQ+8CJNupu2VxgaEpCSngTfvDHLcddcrXwpvn3MPc3FsDUbtN389ZCIe41qqIL0ATv46DQaTw4FOevyVfRyrBOznONoGCVeAYKL6VBdrk01Fh6aytF5zgI3hKaKobgEn+QFfzR6l68c6APvqA0Qv39iLjuh6KbdIV2YsqXfyt6FBgqP2xZuNEZW1jZ8LxUOLl2I40UEh87nFutvnSbfIzN+FcLrajm2H2jV2kZGNKAMx+4qxkZuXSre4JPkENfJm2WNFAKlqPt4ZSEQarkDYzZPcEr2I9fbGjQYVJICoN4LikCv9K5z7ujpTxCTNbVpQWZcEOT6QQBc6Vml/N/NKAIl9o2OeTLiXCmT31+KQMeO492KYNQ6VmkeqrVhGExOUcJdNyDJV9C+3mSekb3Sq78SneYRKDechkWbMl0ol07wGTdBwQQwgaorjRyn07x1rDxpPr3z19/+eubnpPUW4UQ5MYsjs=
+  - secure: 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
+  - CCACHE_CPP2: yes

CMakeLists.txt

+cmake_minimum_required(VERSION 3.4)
+# Note: this is a header only library. If you have an older CMake than 3.4,
+# just add the CLI11/include directory and that's all you need to do.
+
+# Make sure users don't get warnings on a tested (3.4 to 3.14) version
+# of CMake. For most of the policies, the new version is better (hence the change).
+# We don't use the 3.4...3.14 syntax because of a bug in a version of MSVC
+if(${CMAKE_VERSION} VERSION_LESS 3.14)
+    cmake_policy(VERSION ${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION})
+else()
+    cmake_policy(VERSION 3.14)
+endif()
+
+set(VERSION_REGEX "#define CLI11_VERSION[ \t]+\"(.+)\"")
+
+# Read in the line containing the version
+file(STRINGS "${CMAKE_CURRENT_SOURCE_DIR}/include/CLI/Version.hpp"
+    VERSION_STRING REGEX ${VERSION_REGEX})
+
+# Pick out just the version
+string(REGEX REPLACE ${VERSION_REGEX} "\\1" VERSION_STRING "${VERSION_STRING}")
+
+# Add the project
+project(CLI11 LANGUAGES CXX VERSION ${VERSION_STRING})
+
+# Special target that adds warnings. Is not exported.
+add_library(CLI11_warnings INTERFACE)
+
+# Only if built as the main project
+if(CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME)
+    # User settable
+    set(CLI11_CXX_STD "11"  CACHE STRING "The CMake standard to require")
+
+    # Special override for Clang on Linux (useful with an old stdlibc++ and a newer clang)
+    if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
+        option(CLI11_FORCE_LIBCXX "Force Clang to use libc++ instead of libstdc++ (Linux only)" OFF)
+        if(CLI11_FORCE_LIBCXX)
+            set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++")
+            set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -stdlib=libc++")
+        endif()
+    endif()