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111 lines
3.7 KiB
Text
111 lines
3.7 KiB
Text
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cmake_minimum_required(VERSION 3.8...3.19)
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# Read version from version.hpp
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file(READ "${CMAKE_CURRENT_LIST_DIR}/include/tao/pegtl/version.hpp" version_hpp_data)
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string(REGEX MATCH "#define TAO_PEGTL_VERSION \"([^\"]+)\"" _ ${version_hpp_data})
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set(PEGTL_VERSION "${CMAKE_MATCH_1}")
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project(pegtl VERSION ${PEGTL_VERSION} LANGUAGES CXX)
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set(PEGTL_IS_MAIN_PROJECT OFF)
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if(CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
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set(PEGTL_IS_MAIN_PROJECT ON)
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endif()
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if(PEGTL_HAS_PARENT)
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# Multiple versions of PEGTL can't co-exist
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if(NOT ${PROJECT_NAME}_VERSION STREQUAL ${PROJECT_VERSION})
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message(FATAL_ERROR "Multiple mismatched PEGTL versions")
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endif()
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# Only include if this is the first include
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if(NOT ${PROJECT_NAME}_DIR STREQUAL "${PROJECT_BINARY_DIR}")
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return()
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endif()
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endif()
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# Keep track of pegtl version
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set(${PROJECT_NAME}_FOUND TRUE CACHE BOOL "" FORCE)
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set(${PROJECT_NAME}_VERSION "${PROJECT_VERSION}" CACHE STRING "" FORCE)
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set(${PROJECT_NAME}_DIR "${PROJECT_BINARY_DIR}" CACHE PATH "" FORCE)
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mark_as_advanced(${PROJECT_NAME}_FOUND)
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mark_as_advanced(${PROJECT_NAME}_VERSION)
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mark_as_advanced(${PROJECT_NAME}_DIR)
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# installation directories
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set(PEGTL_INSTALL_INCLUDE_DIR "include" CACHE STRING "The installation include directory")
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set(PEGTL_INSTALL_DOC_DIR "share/doc/tao/pegtl" CACHE STRING "The installation doc directory")
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set(PEGTL_INSTALL_CMAKE_DIR "share/pegtl/cmake" CACHE STRING "The installation cmake directory")
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# define a header-only library
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add_library(pegtl INTERFACE)
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add_library(taocpp::pegtl ALIAS pegtl)
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target_include_directories(pegtl INTERFACE
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$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
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$<INSTALL_INTERFACE:${PEGTL_INSTALL_INCLUDE_DIR}>
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)
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target_link_libraries(pegtl INTERFACE filesystem)
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# require C++17
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target_compile_features(pegtl INTERFACE cxx_std_17)
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option(PEGTL_USE_BOOST_FILESYSTEM "Override the auto-detection of std::filesystem and use Boost.Filesystem" OFF)
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# Try compiling a test program with std::filesystem or one of its alternatives
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function(check_filesystem_impl FILESYSTEM_HEADER FILESYSTEM_NAMESPACE OPTIONAL_LIBS OUT_RESULT)
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set(TEST_FILE "test_${OUT_RESULT}.cpp")
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configure_file(.cmake/test_filesystem.cpp.in ${TEST_FILE} @ONLY)
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try_compile(TEST_RESULT
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${CMAKE_CURRENT_BINARY_DIR}
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${CMAKE_CURRENT_BINARY_DIR}/${TEST_FILE}
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CXX_STANDARD 17)
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if(NOT TEST_RESULT)
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# Retry with each of the optional libraries
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foreach(OPTIONAL_LIB IN LISTS OPTIONAL_LIBS)
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try_compile(TEST_RESULT
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${CMAKE_CURRENT_BINARY_DIR}
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${CMAKE_CURRENT_BINARY_DIR}/${TEST_FILE}
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LINK_LIBRARIES ${OPTIONAL_LIB}
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CXX_STANDARD 17)
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if(TEST_RESULT)
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# Looks like the optional library was required, go ahead and add it to the link options.
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message(STATUS "Adding ${OPTIONAL_LIB} to the PEGTL to build with ${FILESYSTEM_NAMESPACE}.")
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target_link_libraries(${PROJECT_NAME} INTERFACE ${OPTIONAL_LIB})
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break()
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endif()
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endforeach()
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endif()
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set(${OUT_RESULT} ${TEST_RESULT} PARENT_SCOPE)
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endfunction()
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# testing
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option(PEGTL_BUILD_TESTS "Build test programs" ${PEGTL_IS_MAIN_PROJECT})
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if(PEGTL_BUILD_TESTS)
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enable_testing()
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add_subdirectory(src/test/pegtl)
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endif()
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# examples
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option(PEGTL_BUILD_EXAMPLES "Build example programs" ${PEGTL_IS_MAIN_PROJECT})
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if(PEGTL_BUILD_EXAMPLES)
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add_subdirectory(src/example/pegtl)
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endif()
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# Make package findable
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configure_file(.cmake/pegtl-config.cmake.in pegtl-config.cmake @ONLY)
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# Ignore pointer width differences since this is a header-only library
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unset(CMAKE_SIZEOF_VOID_P)
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# Enable version checks in find_package
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include(CMakePackageConfigHelpers)
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write_basic_package_version_file(pegtl-config-version.cmake COMPATIBILITY SameMajorVersion)
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# install and export target
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