cxxopts.cmake
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# Copyright (c) 2014 Jarryd Beck
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
if (CMAKE_VERSION VERSION_GREATER 3.10 OR CMAKE_VERSION VERSION_EQUAL 3.10)
# Use include_guard() added in cmake 3.10
include_guard()
endif()
include(CMakePackageConfigHelpers)
function(cxxopts_getversion version_arg)
# Parse the current version from the cxxopts header
file(STRINGS "${CMAKE_CURRENT_SOURCE_DIR}/include/cxxopts.hpp" cxxopts_version_defines
REGEX "#define CXXOPTS__VERSION_(MAJOR|MINOR|PATCH)")
foreach(ver ${cxxopts_version_defines})
if(ver MATCHES "#define CXXOPTS__VERSION_(MAJOR|MINOR|PATCH) +([^ ]+)$")
set(CXXOPTS__VERSION_${CMAKE_MATCH_1} "${CMAKE_MATCH_2}" CACHE INTERNAL "")
endif()
endforeach()
set(VERSION ${CXXOPTS__VERSION_MAJOR}.${CXXOPTS__VERSION_MINOR}.${CXXOPTS__VERSION_PATCH})
# Give feedback to the user. Prefer DEBUG when available since large projects tend to have a lot
# going on already
if (CMAKE_VERSION VERSION_GREATER 3.15 OR CMAKE_VERSION VERSION_EQUAL 3.15)
message(DEBUG "cxxopts version ${VERSION}")
else()
message(STATUS "cxxopts version ${VERSION}")
endif()
# Return the information to the caller
set(${version_arg} ${VERSION} PARENT_SCOPE)
endfunction()
# Optionally, enable unicode support using the ICU library
function(cxxopts_use_unicode)
find_package(PkgConfig)
pkg_check_modules(ICU REQUIRED icu-uc)
target_link_libraries(cxxopts INTERFACE ${ICU_LDFLAGS})
target_compile_options(cxxopts INTERFACE ${ICU_CFLAGS})
target_compile_definitions(cxxopts INTERFACE CXXOPTS_USE_UNICODE)
endfunction()
# Request C++11 without gnu extension for the whole project and enable more warnings
macro(cxxopts_set_cxx_standard)
if (CXXOPTS_CXX_STANDARD)
set(CMAKE_CXX_STANDARD ${CXXOPTS_CXX_STANDARD})
else()
set(CMAKE_CXX_STANDARD 11)
endif()
set(CMAKE_CXX_EXTENSIONS OFF)
endmacro()
# Helper function to enable warnings
function(cxxopts_enable_warnings)
if(MSVC)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W2")
elseif(CMAKE_CXX_COMPILER_ID MATCHES "[Cc]lang" OR CMAKE_CXX_COMPILER_ID MATCHES "GNU")
if (CMAKE_CXX_COMPILER_ID MATCHES "GNU")
if (${CMAKE_CXX_COMPILER_VERSION} VERSION_GREATER_EQUAL 5.0)
set(COMPILER_SPECIFIC_FLAGS "-Wsuggest-override")
endif()
endif()
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Werror -Wextra -Wshadow -Weffc++ -Wsign-compare -Wshadow -Wwrite-strings -Wpointer-arith -Winit-self -Wconversion -Wno-sign-conversion ${COMPILER_SPECIFIC_FLAGS}")
endif()
set(CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} PARENT_SCOPE)
endfunction()
# Helper function to ecapsulate install logic
function(cxxopts_install_logic)
if(CMAKE_LIBRARY_ARCHITECTURE)
string(REPLACE "/${CMAKE_LIBRARY_ARCHITECTURE}" "" CMAKE_INSTALL_LIBDIR_ARCHIND "${CMAKE_INSTALL_LIBDIR}")
else()
# On some systems (e.g. NixOS), `CMAKE_LIBRARY_ARCHITECTURE` can be empty
set(CMAKE_INSTALL_LIBDIR_ARCHIND "${CMAKE_INSTALL_LIBDIR}")
endif()
set(CXXOPTS_CMAKE_DIR "${CMAKE_INSTALL_LIBDIR_ARCHIND}/cmake/cxxopts" CACHE STRING "Installation directory for cmake files, relative to ${CMAKE_INSTALL_PREFIX}.")
set(version_config "${PROJECT_BINARY_DIR}/cxxopts-config-version.cmake")
set(project_config "${PROJECT_BINARY_DIR}/cxxopts-config.cmake")
set(targets_export_name cxxopts-targets)
set(PackagingTemplatesDir "${PROJECT_SOURCE_DIR}/packaging")
if(${CMAKE_VERSION} VERSION_GREATER "3.14")
set(OPTIONAL_ARCH_INDEPENDENT "ARCH_INDEPENDENT")
endif()
# Generate the version, config and target files into the build directory.
write_basic_package_version_file(
${version_config}
VERSION ${VERSION}
COMPATIBILITY AnyNewerVersion
${OPTIONAL_ARCH_INDEPENDENT}
)
configure_package_config_file(
${PackagingTemplatesDir}/cxxopts-config.cmake.in
${project_config}
INSTALL_DESTINATION ${CXXOPTS_CMAKE_DIR})
export(TARGETS cxxopts NAMESPACE cxxopts::
FILE ${PROJECT_BINARY_DIR}/${targets_export_name}.cmake)
# Install version, config and target files.
install(
FILES ${project_config} ${version_config}
DESTINATION ${CXXOPTS_CMAKE_DIR})
install(EXPORT ${targets_export_name} DESTINATION ${CXXOPTS_CMAKE_DIR}
NAMESPACE cxxopts::)
# Install the header file and export the target
install(TARGETS cxxopts EXPORT ${targets_export_name} DESTINATION ${CMAKE_INSTALL_LIBDIR})
install(FILES ${PROJECT_SOURCE_DIR}/include/cxxopts.hpp DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
set(CPACK_PACKAGE_NAME "${PROJECT_NAME}")
set(CPACK_PACKAGE_VENDOR "cxxopt developers")
set(CPACK_PACKAGE_DESCRIPTION "${PROJECT_DESCRIPTION}")
set(CPACK_DEBIAN_PACKAGE_NAME "${CPACK_PACKAGE_NAME}")
set(CPACK_RPM_PACKAGE_NAME "${CPACK_PACKAGE_NAME}")
set(CPACK_PACKAGE_HOMEPAGE_URL "${PROJECT_HOMEPAGE_URL}")
set(CPACK_PACKAGE_MAINTAINER "${CPACK_PACKAGE_VENDOR}")
set(CPACK_DEBIAN_PACKAGE_MAINTAINER "${CPACK_PACKAGE_MAINTAINER}")
set(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_CURRENT_SOURCE_DIR}/LICENSE")
set(CPACK_RESOURCE_FILE_README "${CMAKE_CURRENT_SOURCE_DIR}/README.md")
set(CPACK_DEBIAN_PACKAGE_NAME "lib${PROJECT_NAME}-dev")
set(CPACK_DEBIAN_PACKAGE_DEPENDS "libc6-dev")
set(CPACK_DEBIAN_PACKAGE_SUGGESTS "cmake, pkg-config, pkg-conf")
set(CPACK_RPM_PACKAGE_NAME "lib${PROJECT_NAME}-devel")
set(CPACK_RPM_PACKAGE_SUGGESTS "${CPACK_DEBIAN_PACKAGE_SUGGESTS}")
set(CPACK_DEB_COMPONENT_INSTALL ON)
set(CPACK_RPM_COMPONENT_INSTALL ON)
set(CPACK_NSIS_COMPONENT_INSTALL ON)
set(CPACK_DEBIAN_COMPRESSION_TYPE "xz")
set(PKG_CONFIG_FILE_NAME "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}.pc")
configure_file("${PackagingTemplatesDir}/pkgconfig.pc.in" "${PKG_CONFIG_FILE_NAME}" @ONLY)
install(FILES "${PKG_CONFIG_FILE_NAME}"
DESTINATION "${CMAKE_INSTALL_LIBDIR_ARCHIND}/pkgconfig"
)
include(CPack)
endfunction()