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pmed#138 Add initial CMake support
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‎CMakeLists.txt

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cmake_minimum_required(VERSION 3.14)
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# using file(CREATE_LINK) that was added in 3.14
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# Get version from config.hpp
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file(READ ${CMAKE_CURRENT_SOURCE_DIR}/v8pp/config.hpp config_hpp)
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if(NOT config_hpp MATCHES "V8PP_VERSION \"([0-9]+)\\.([0-9]+)\\.([0-9]+)\"")
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message(FATAL_ERROR "Cannot get V8PP_VERSION from config.hpp.")
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endif()
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unset(config_hpp)
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# Use math to skip leading zeros if any.
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math(EXPR V8PP_VERSION_MAJOR ${CMAKE_MATCH_1})
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math(EXPR V8PP_VERSION_MINOR ${CMAKE_MATCH_2})
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math(EXPR V8PP_VERSION_PATCH ${CMAKE_MATCH_3})
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set(V8PP_VERSION ${V8PP_VERSION_MAJOR}.${V8PP_VERSION_MINOR}.${V8PP_VERSION_PATCH})
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project(v8pp VERSION ${V8PP_VERSION} LANGUAGES CXX)
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# Determine if v8pp is built as a subproject (using add_subdirectory)
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# or if it is the master project.
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if(NOT DEFINED V8PP_MASTER_PROJECT)
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set(V8PP_MASTER_PROJECT OFF)
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if(CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
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set(V8PP_MASTER_PROJECT ON)
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endif()
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endif()
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# Options that control generation of various targets.
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option(V8PP_WARNING "Enable extra warnings and expensive tests." ${V8PP_MASTER_PROJECT})
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option(V8PP_WERROR "Halt the compilation with an error on compiler warnings." OFF)
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option(V8PP_TEST "Generate the test target." ${V8PP_MASTER_PROJECT})
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option(V8PP_INSTALL "Generate install target." ${V8PP_MASTER_PROJECT})
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# Warnings setup
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set(V8PP_WARNING_OPTIONS)
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if(V8PP_WARNING)
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if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
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list(APPEND V8PP_WARNING_OPTIONS "-Wall")
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list(APPEND V8PP_WARNING_OPTIONS "-Wextra")
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list(APPEND V8PP_WARNING_OPTIONS "-Wno-unused-function")
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elseif(
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CMAKE_CXX_COMPILER_ID STREQUAL "Clang"
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OR CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang"
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)
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list(APPEND V8PP_WARNING_OPTIONS "-Wall")
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list(APPEND V8PP_WARNING_OPTIONS "-Wextra")
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elseif(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
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set_msvc_warning_flags(WARNING_OPTIONS)
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list(APPEND V8PP_WARNING_OPTIONS "/W3")
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else()
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message(SEND_ERROR "unknown compiler \"${CMAKE_CXX_COMPILER_ID}\"")
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endif()
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endif()
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if(V8PP_WERROR)
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if(
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CMAKE_CXX_COMPILER_ID STREQUAL "GNU"
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OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang"
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OR CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang"
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)
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list(APPEND V8PP_WARNING_OPTIONS "-Werror")
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elseif(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
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set_msvc_warning_flags(WARNING_OPTIONS)
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list(APPEND V8PP_WARNING_OPTIONS "/WX")
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else()
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message(SEND_ERROR "unknown compiler \"${CMAKE_CXX_COMPILER_ID}\"")
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endif()
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endif()
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# Find V8 package
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list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}")
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find_package(V8 REQUIRED)
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add_subdirectory(v8pp)
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if(V8PP_TEST)
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add_subdirectory(test)
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endif()
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if(V8PP_INSTALL)
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# cmake code for install is based on https://github.com/onqtam/doctest/blob/master/CMakeLists.txt
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set(generated_dir "${CMAKE_CURRENT_BINARY_DIR}/generated")
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if(CMAKE_SYSTEM_NAME STREQUAL Linux)
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include(GNUInstallDirs)
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set(include_install_dir ${CMAKE_INSTALL_INCLUDEDIR})
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set(config_install_dir "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}")
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else()
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set(include_install_dir "include")
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set(config_install_dir "lib/cmake/${PROJECT_NAME}")
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endif()
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set(version_config "${generated_dir}/${PROJECT_NAME}ConfigVersion.cmake")
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set(project_config "${generated_dir}/${PROJECT_NAME}Config.cmake")
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set(targets_export_name "${PROJECT_NAME}Targets")
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set(namespace "${PROJECT_NAME}::")
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include(CMakePackageConfigHelpers)
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write_basic_package_version_file(
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"${version_config}"
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VERSION ${PROJECT_VERSION}
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COMPATIBILITY SameMajorVersion
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)
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configure_file("Config.cmake.in" "${project_config}" @ONLY)
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install(
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TARGETS v8pp v8pp-header-only
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EXPORT "${targets_export_name}"
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INCLUDES DESTINATION "${include_install_dir}"
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)
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install(
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DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/v8pp/include/"
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DESTINATION "${include_install_dir}/"
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)
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install(
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FILES "${project_config}" "${version_config}"
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DESTINATION "${config_install_dir}"
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)
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install(
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EXPORT "${targets_export_name}"
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NAMESPACE "${namespace}"
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DESTINATION "${config_install_dir}"
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)
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endif()

‎Config.cmake.in

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if(NOT TARGET v8pp::v8pp)
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# Provide path for scripts
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list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}")
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include("${CMAKE_CURRENT_LIST_DIR}/@targets_export_name@.cmake")
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endif()

‎FindV8.cmake

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# Based on https://raw.githubusercontent.com/nicehash/cpp-ethereum/master/cmake/Findv8.cmake
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#
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# Find v8
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#
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# Find the v8 includes and library
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#
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# if you nee to add a custom library search path, do it via via CMAKE_PREFIX_PATH
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#
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# This module defines
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# V8_INCLUDE_DIRS, where to find header, etc.
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# V8_LIBRARIES, the libraries needed to use v8.
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# V8_FOUND, If false, do not try to use v8.
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# only look in default directories
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find_path(V8_INCLUDE_DIR NAMES v8.h PATHS /usr/include/v8 DOC "v8 include dir")
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find_library(V8_LIBRARY NAMES v8 PATHS /usr/lib DOC "v8 library")
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set(V8_INCLUDE_DIRS ${V8_INCLUDE_DIR})
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set(V8_LIBRARIES ${V8_LIBRARY})
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# debug library on windows
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# same naming convention as in qt (appending debug library with d)
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# boost is using the same "hack" as us with "optimized" and "debug"
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if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
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find_library(V8_LIBRARY NAMES v8_base DOC "v8 base library")
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find_library(
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V8_NO_SNAPSHOT_LIBRARY
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NAMES v8_nosnapshot
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DOC "v8 nosnapshot library"
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)
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set(V8_LIBRARIES ${V8_LIBRARY} ${V8_NO_SNAPSHOT_LIBRARY})
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find_library(V8_LIBRARY_DEBUG NAMES v8_based DOC "v8 base library")
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find_library(
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V8_NO_SNAPSHOT_LIBRARY_DEBUG
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NAMES v8_nosnapshotd
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DOC "v8 nosnapshot library"
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)
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set(V8_LIBRARIES
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"ws2_32"
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"winmm"
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optimized
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${V8_LIBRARIES}
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debug
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${V8_LIBRARY_DEBUG}
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${V8_NO_SNAPSHOT_LIBRARY_DEBUG}
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)
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endif()
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# handle the QUIETLY and REQUIRED arguments and set V8_FOUND to TRUE
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# if all listed variables are TRUE, hide their existence from configuration view
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include(FindPackageHandleStandardArgs)
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find_package_handle_standard_args(V8 DEFAULT_MSG V8_INCLUDE_DIR V8_LIBRARY)
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mark_as_advanced(V8_INCLUDE_DIR V8_LIBRARY)
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if(V8_FOUND)
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if(NOT TARGET V8::V8)
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add_library(V8::V8 SHARED IMPORTED)
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set_target_properties(
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V8::V8
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PROPERTIES
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INTERFACE_INCLUDE_DIRECTORIES "${V8_INCLUDE_DIR}"
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IMPORTED_LOCATION "${V8_LIBRARY}"
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)
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endif()
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endif()

‎test/CMakeLists.txt

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# Test target
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file(GLOB v8pp_test_cpp *.cpp)
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list(SORT v8pp_test_cpp)
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add_executable(v8pp_test ${v8pp_test_cpp})
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target_link_libraries(v8pp_test PRIVATE v8pp::v8pp)
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target_compile_options(v8pp_test PRIVATE ${V8PP_WARNING_OPTIONS})

‎v8pp/CMakeLists.txt

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# Copy all headers to ${CMAKE_CURRENT_BINARY_DIR}/v8pp
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# It makes this repo a little bit submodule friendly
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set(V8PP_INCLUDES_DIR "${CMAKE_CURRENT_BINARY_DIR}/include")
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file(MAKE_DIRECTORY "${V8PP_INCLUDES_DIR}/v8pp")
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file(GLOB v8pp_hpp RELATIVE ${CMAKE_CURRENT_LIST_DIR} *.hpp)
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file(GLOB v8pp_ipp RELATIVE ${CMAKE_CURRENT_LIST_DIR} *.ipp)
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foreach(f ${v8pp_hpp};${v8pp_ipp})
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set(_original "${CMAKE_CURRENT_LIST_DIR}/${f}")
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set(_linkname "${V8PP_INCLUDES_DIR}/v8pp/${f}")
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file(CREATE_LINK "${_original}" "${_linkname}" COPY_ON_ERROR)
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endforeach()
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# Header only library target
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add_library(v8pp-header-only INTERFACE)
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add_library(v8pp::v8pp-header-only ALIAS v8pp-header-only)
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target_include_directories(v8pp-header-only INTERFACE
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$<BUILD_INTERFACE:${V8PP_INCLUDES_DIR}>
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$<INSTALL_INTERFACE:include/v8pp>)
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target_compile_definitions(v8pp-header-only INTERFACE V8PP_HEADER_ONLY=1)
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target_compile_features(v8pp-header-only INTERFACE cxx_std_14)
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target_link_libraries(v8pp-header-only INTERFACE V8::V8)
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# Static library target
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file(GLOB v8pp_cpp *.cpp)
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list(SORT v8pp_cpp)
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add_library(v8pp STATIC ${v8pp_cpp})
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add_library(v8pp::v8pp ALIAS v8pp)
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target_include_directories(v8pp PUBLIC
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$<BUILD_INTERFACE:${V8PP_INCLUDES_DIR}>
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$<INSTALL_INTERFACE:include/v8pp>)
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target_compile_definitions(v8pp PUBLIC V8PP_HEADER_ONLY=0)
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target_compile_features(v8pp PUBLIC cxx_std_14)
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target_link_libraries(v8pp PUBLIC V8::V8 ${CMAKE_DL_LIBS})
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target_compile_options(v8pp PRIVATE ${V8PP_WARNING_OPTIONS})
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set_property(TARGET v8pp PROPERTY POSITION_INDEPENDENT_CODE ON)

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