Cmake Revamp (#270)
* Cmake Revamp I needed to do a variety of things to ensure cxxopts worked well in my own project. I created a new cmake module to abstract a lot of the logic in the main CMakelists.txt, I think it really assists in the readability of the project. Consequently a lot of logic is now written in functions. I made a lot of the project options off by default unless the project is being built standalone. As a frequent consumer of cmake libraries this is a huge issue. Since examples, tests, installation, etc. aren't things I expect/desired by default when using libraries. Co-authored-by: Juan Ramos <juanr0911@gmail.com>
This commit is contained in:
jpr89
GitHub
parent
2d8e17c4f8
commit
c55726ee29
115
CMakeLists.txt
115
CMakeLists.txt
@ -17,96 +17,61 @@
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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cmake_minimum_required(VERSION 3.1)
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cmake_minimum_required(VERSION 3.1...3.19)
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# parse the current version from the cxxopts header
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file(STRINGS "${CMAKE_CURRENT_SOURCE_DIR}/include/cxxopts.hpp" cxxopts_version_defines
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REGEX "#define CXXOPTS__VERSION_(MAJOR|MINOR|PATCH)")
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foreach(ver ${cxxopts_version_defines})
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if(ver MATCHES "#define CXXOPTS__VERSION_(MAJOR|MINOR|PATCH) +([^ ]+)$")
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set(CXXOPTS__VERSION_${CMAKE_MATCH_1} "${CMAKE_MATCH_2}" CACHE INTERNAL "")
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endif()
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endforeach()
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set(VERSION ${CXXOPTS__VERSION_MAJOR}.${CXXOPTS__VERSION_MINOR}.${CXXOPTS__VERSION_PATCH})
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message(STATUS "cxxopts version ${VERSION}")
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list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/")
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include(cxxopts)
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project(cxxopts VERSION "${VERSION}" LANGUAGES CXX)
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# Get the version of the library
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cxxopts_getversion(VERSION)
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enable_testing()
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project(cxxopts
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VERSION "${VERSION}"
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LANGUAGES CXX
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)
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option(CXXOPTS_BUILD_EXAMPLES "Set to ON to build examples" ON)
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option(CXXOPTS_BUILD_TESTS "Set to ON to build tests" ON)
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option(CXXOPTS_ENABLE_INSTALL "Generate the install target" ON)
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option(CXXOPTS_ENABLE_WARNINGS "Add warnings to CMAKE_CXX_FLAGS" ON)
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# request c++11 without gnu extension for the whole project and enable more warnings
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if (CXXOPTS_CXX_STANDARD)
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set(CMAKE_CXX_STANDARD ${CXXOPTS_CXX_STANDARD})
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else()
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set(CMAKE_CXX_STANDARD 11)
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# Determine whether this is a standalone project or included by other projects
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set(CXXOPTS_STANDALONE_PROJECT OFF)
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if (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
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set(CXXOPTS_STANDALONE_PROJECT ON)
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endif()
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set(CMAKE_CXX_EXTENSIONS OFF)
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# Establish the project options
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option(CXXOPTS_BUILD_EXAMPLES "Set to ON to build examples" ${CXXOPTS_STANDALONE_PROJECT})
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option(CXXOPTS_BUILD_TESTS "Set to ON to build tests" ${CXXOPTS_STANDALONE_PROJECT})
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option(CXXOPTS_ENABLE_INSTALL "Generate the install target" ${CXXOPTS_STANDALONE_PROJECT})
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option(CXXOPTS_ENABLE_WARNINGS "Add warnings to CMAKE_CXX_FLAGS" ${CXXOPTS_STANDALONE_PROJECT})
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option(CXXOPTS_USE_UNICODE_HELP "Use ICU Unicode library" OFF)
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if (CXXOPTS_STANDALONE_PROJECT)
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cxxopts_set_cxx_standard()
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endif()
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if (CXXOPTS_ENABLE_WARNINGS)
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if(MSVC)
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W2")
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elseif(CMAKE_CXX_COMPILER_ID MATCHES "[Cc]lang" OR CMAKE_CXX_COMPILER_ID MATCHES "GNU")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Werror -Wextra -Wshadow -Weffc++ -Wsign-compare -Wshadow -Wwrite-strings -Wpointer-arith -Winit-self -Wconversion -Wno-sign-conversion -Wsuggest-override")
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endif()
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cxxopts_enable_warnings()
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endif()
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add_library(cxxopts INTERFACE)
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add_library(cxxopts::cxxopts ALIAS cxxopts)
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add_subdirectory(include)
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# optionally, enable unicode support using the ICU library
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set(CXXOPTS_USE_UNICODE_HELP FALSE CACHE BOOL "Use ICU Unicode library")
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# Link against the ICU library when requested
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if(CXXOPTS_USE_UNICODE_HELP)
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find_package(PkgConfig)
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pkg_check_modules(ICU REQUIRED icu-uc)
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target_link_libraries(cxxopts INTERFACE ${ICU_LDFLAGS})
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target_compile_options(cxxopts INTERFACE ${ICU_CFLAGS})
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target_compile_definitions(cxxopts INTERFACE CXXOPTS_USE_UNICODE)
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cxxopts_use_unicode()
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endif()
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target_include_directories(cxxopts INTERFACE
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$<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
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$<INSTALL_INTERFACE:include>
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)
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if(CXXOPTS_ENABLE_INSTALL)
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include(GNUInstallDirs)
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include(CMakePackageConfigHelpers)
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set(CXXOPTS_CMAKE_DIR "${CMAKE_INSTALL_LIBDIR}/cmake/cxxopts" CACHE STRING
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"Installation directory for cmake files, relative to ${CMAKE_INSTALL_PREFIX}.")
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set(version_config "${PROJECT_BINARY_DIR}/cxxopts-config-version.cmake")
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set(project_config "${PROJECT_BINARY_DIR}/cxxopts-config.cmake")
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set(targets_export_name cxxopts-targets)
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# Generate the version, config and target files into the build directory.
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write_basic_package_version_file(
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${version_config}
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VERSION ${VERSION}
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COMPATIBILITY AnyNewerVersion)
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configure_package_config_file(
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${PROJECT_SOURCE_DIR}/cxxopts-config.cmake.in
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${project_config}
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INSTALL_DESTINATION ${CXXOPTS_CMAKE_DIR})
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export(TARGETS cxxopts NAMESPACE cxxopts::
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FILE ${PROJECT_BINARY_DIR}/${targets_export_name}.cmake)
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# Install version, config and target files.
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install(
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FILES ${project_config} ${version_config}
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DESTINATION ${CXXOPTS_CMAKE_DIR})
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install(EXPORT ${targets_export_name} DESTINATION ${CXXOPTS_CMAKE_DIR}
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NAMESPACE cxxopts::)
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# Install the header file and export the target
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install(TARGETS cxxopts EXPORT ${targets_export_name} DESTINATION ${CMAKE_INSTALL_LIBDIR})
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install(FILES ${PROJECT_SOURCE_DIR}/include/cxxopts.hpp DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
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# Install cxxopts when requested by the user
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if (CXXOPTS_ENABLE_INSTALL)
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cxxopts_install_logic()
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endif()
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add_subdirectory(src)
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add_subdirectory(test)
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# Build examples when requested by the user
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if (CXXOPTS_BUILD_EXAMPLES)
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add_subdirectory(src)
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endif()
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# Enable testing when requested by the user
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if (CXXOPTS_BUILD_TESTS)
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enable_testing()
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add_subdirectory(test)
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endif()
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112
cmake/cxxopts.cmake
Normal file
112
cmake/cxxopts.cmake
Normal file
@ -0,0 +1,112 @@
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# Copyright (c) 2014 Jarryd Beck
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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if (CMAKE_VERSION VERSION_GREATER 3.10 OR CMAKE_VERSION VERSION_EQUAL 3.10)
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# Use include_guard() added in cmake 3.10
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include_guard()
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endif()
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include(GNUInstallDirs)
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include(CMakePackageConfigHelpers)
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function(cxxopts_getversion version_arg)
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# Parse the current version from the cxxopts header
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file(STRINGS "${CMAKE_CURRENT_SOURCE_DIR}/include/cxxopts.hpp" cxxopts_version_defines
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REGEX "#define CXXOPTS__VERSION_(MAJOR|MINOR|PATCH)")
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foreach(ver ${cxxopts_version_defines})
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if(ver MATCHES "#define CXXOPTS__VERSION_(MAJOR|MINOR|PATCH) +([^ ]+)$")
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set(CXXOPTS__VERSION_${CMAKE_MATCH_1} "${CMAKE_MATCH_2}" CACHE INTERNAL "")
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endif()
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endforeach()
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set(VERSION ${CXXOPTS__VERSION_MAJOR}.${CXXOPTS__VERSION_MINOR}.${CXXOPTS__VERSION_PATCH})
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# Give feedback to the user. Prefer DEBUG when available since large projects tend to have a lot
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# going on already
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if (CMAKE_VERSION VERSION_GREATER 3.15 OR CMAKE_VERSION VERSION_EQUAL 3.15)
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message(DEBUG "cxxopts version ${VERSION}")
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else()
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message(STATUS "cxxopts version ${VERSION}")
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endif()
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# Return the information to the caller
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set(${version_arg} ${VERSION} PARENT_SCOPE)
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endfunction()
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# Optionally, enable unicode support using the ICU library
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function(cxxopts_use_unicode)
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find_package(PkgConfig)
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pkg_check_modules(ICU REQUIRED icu-uc)
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target_link_libraries(cxxopts INTERFACE ${ICU_LDFLAGS})
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target_compile_options(cxxopts INTERFACE ${ICU_CFLAGS})
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target_compile_definitions(cxxopts INTERFACE CXXOPTS_USE_UNICODE)
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endfunction()
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# Request C++11 without gnu extension for the whole project and enable more warnings
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macro(cxxopts_set_cxx_standard)
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if (CXXOPTS_CXX_STANDARD)
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set(CMAKE_CXX_STANDARD ${CXXOPTS_CXX_STANDARD})
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else()
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set(CMAKE_CXX_STANDARD 11)
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endif()
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set(CMAKE_CXX_EXTENSIONS OFF)
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endmacro()
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# Helper function to enable warnings
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function(cxxopts_enable_warnings)
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if(MSVC)
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W2")
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elseif(CMAKE_CXX_COMPILER_ID MATCHES "[Cc]lang" OR CMAKE_CXX_COMPILER_ID MATCHES "GNU")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Werror -Wextra -Wshadow -Weffc++ -Wsign-compare -Wshadow -Wwrite-strings -Wpointer-arith -Winit-self -Wconversion -Wno-sign-conversion -Wsuggest-override")
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endif()
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set(CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} PARENT_SCOPE)
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endfunction()
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# Helper function to ecapsulate install logic
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function(cxxopts_install_logic)
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set(CXXOPTS_CMAKE_DIR "${CMAKE_INSTALL_LIBDIR}/cmake/cxxopts" CACHE STRING "Installation directory for cmake files, relative to ${CMAKE_INSTALL_PREFIX}.")
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set(version_config "${PROJECT_BINARY_DIR}/cxxopts-config-version.cmake")
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set(project_config "${PROJECT_BINARY_DIR}/cxxopts-config.cmake")
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set(targets_export_name cxxopts-targets)
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# Generate the version, config and target files into the build directory.
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write_basic_package_version_file(
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${version_config}
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VERSION ${VERSION}
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COMPATIBILITY AnyNewerVersion)
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configure_package_config_file(
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${PROJECT_SOURCE_DIR}/cxxopts-config.cmake.in
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${project_config}
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INSTALL_DESTINATION ${CXXOPTS_CMAKE_DIR})
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export(TARGETS cxxopts NAMESPACE cxxopts::
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FILE ${PROJECT_BINARY_DIR}/${targets_export_name}.cmake)
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# Install version, config and target files.
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install(
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FILES ${project_config} ${version_config}
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DESTINATION ${CXXOPTS_CMAKE_DIR})
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install(EXPORT ${targets_export_name} DESTINATION ${CXXOPTS_CMAKE_DIR}
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NAMESPACE cxxopts::)
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# Install the header file and export the target
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install(TARGETS cxxopts EXPORT ${targets_export_name} DESTINATION ${CMAKE_INSTALL_LIBDIR})
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install(FILES ${PROJECT_SOURCE_DIR}/include/cxxopts.hpp DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
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endfunction()
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23
include/CMakeLists.txt
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23
include/CMakeLists.txt
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@ -0,0 +1,23 @@
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# Copyright (c) 2014 Jarryd Beck
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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target_include_directories(cxxopts INTERFACE
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$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
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$<INSTALL_INTERFACE:include>
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)
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@ -18,7 +18,5 @@
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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if(CXXOPTS_BUILD_EXAMPLES)
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add_executable(example example.cpp)
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target_link_libraries(example cxxopts)
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endif()
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add_executable(example example.cpp)
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target_link_libraries(example cxxopts)
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@ -1,35 +1,53 @@
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if (CXXOPTS_BUILD_TESTS)
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add_executable(options_test main.cpp options.cpp)
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target_link_libraries(options_test cxxopts)
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add_test(options options_test)
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# Copyright (c) 2014 Jarryd Beck
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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# test if the targets are findable from the build directory
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add_test(find-package-test ${CMAKE_CTEST_COMMAND}
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-C ${CMAKE_BUILD_TYPE}
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--build-and-test
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"${CMAKE_CURRENT_SOURCE_DIR}/find-package-test"
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"${CMAKE_CURRENT_BINARY_DIR}/find-package-test"
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--build-generator ${CMAKE_GENERATOR}
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--build-makeprogram ${CMAKE_MAKE_PROGRAM}
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--build-options
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"-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}"
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"-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}"
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"-Dcxxopts_DIR=${PROJECT_BINARY_DIR}"
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)
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add_executable(options_test main.cpp options.cpp)
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target_link_libraries(options_test cxxopts)
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add_test(options options_test)
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# test if the targets are findable when add_subdirectory is used
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add_test(add-subdirectory-test ${CMAKE_CTEST_COMMAND}
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-C ${CMAKE_BUILD_TYPE}
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--build-and-test
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"${CMAKE_CURRENT_SOURCE_DIR}/add-subdirectory-test"
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"${CMAKE_CURRENT_BINARY_DIR}/add-subdirectory-test"
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--build-generator ${CMAKE_GENERATOR}
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--build-makeprogram ${CMAKE_MAKE_PROGRAM}
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--build-options
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"-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}"
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"-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}"
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)
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# test if the targets are findable from the build directory
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add_test(find-package-test ${CMAKE_CTEST_COMMAND}
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-C ${CMAKE_BUILD_TYPE}
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--build-and-test
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"${CMAKE_CURRENT_SOURCE_DIR}/find-package-test"
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"${CMAKE_CURRENT_BINARY_DIR}/find-package-test"
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--build-generator ${CMAKE_GENERATOR}
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--build-makeprogram ${CMAKE_MAKE_PROGRAM}
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--build-options
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"-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}"
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"-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}"
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"-Dcxxopts_DIR=${PROJECT_BINARY_DIR}"
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)
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add_executable(link_test link_a.cpp link_b.cpp)
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target_link_libraries(link_test cxxopts)
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endif()
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# test if the targets are findable when add_subdirectory is used
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add_test(add-subdirectory-test ${CMAKE_CTEST_COMMAND}
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-C ${CMAKE_BUILD_TYPE}
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--build-and-test
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"${CMAKE_CURRENT_SOURCE_DIR}/add-subdirectory-test"
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"${CMAKE_CURRENT_BINARY_DIR}/add-subdirectory-test"
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--build-generator ${CMAKE_GENERATOR}
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--build-makeprogram ${CMAKE_MAKE_PROGRAM}
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--build-options
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"-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}"
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"-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}"
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)
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add_executable(link_test link_a.cpp link_b.cpp)
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target_link_libraries(link_test cxxopts)
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