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############################################################################
# Copyright (c) Wolf Vollprecht, Johan Mabille and Sylvain Corlay #
# Copyright (c) QuantStack #
# #
# Distributed under the terms of the BSD 3-Clause License. #
# #
# The full license is in the file LICENSE, distributed with this software. #
############################################################################
cmake_minimum_required(VERSION 3.29)
project(xtensor-python)
set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake ${CMAKE_MODULE_PATH})
set(XTENSOR_PYTHON_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/include)
# Versioning
# ==========
set(XTENSOR_PYTHON_CONFIG_FILE
"${XTENSOR_PYTHON_INCLUDE_DIR}/xtensor-python/xtensor_python_config.hpp")
file(STRINGS ${XTENSOR_PYTHON_CONFIG_FILE} xtensor_python_version_defines
REGEX "#define XTENSOR_PYTHON_VERSION_(MAJOR|MINOR|PATCH)")
foreach(ver ${xtensor_python_version_defines})
if(ver MATCHES "#define XTENSOR_PYTHON_VERSION_(MAJOR|MINOR|PATCH) +([^ ]+)$")
set(XTENSOR_PYTHON_VERSION_${CMAKE_MATCH_1} "${CMAKE_MATCH_2}" CACHE INTERNAL "")
endif()
endforeach()
set(${PROJECT_NAME}_VERSION
${XTENSOR_PYTHON_VERSION_MAJOR}.${XTENSOR_PYTHON_VERSION_MINOR}.${XTENSOR_PYTHON_VERSION_PATCH})
message(STATUS "xtensor-python v${${PROJECT_NAME}_VERSION}")
# Dependencies
# ============
set(xtensor_REQUIRED_VERSION 0.26.0)
if(TARGET xtensor)
set(xtensor_VERSION ${XTENSOR_VERSION_MAJOR}.${XTENSOR_VERSION_MINOR}.${XTENSOR_VERSION_PATCH})
# Note: This is not SEMVER compatible comparison
if( NOT ${xtensor_VERSION} VERSION_GREATER_EQUAL ${xtensor_REQUIRED_VERSION})
message(ERROR "Mismatch xtensor versions. Found '${xtensor_VERSION}' but requires: '${xtensor_REQUIRED_VERSION}'")
else()
message(STATUS "Found xtensor v${xtensor_VERSION}")
endif()
else()
find_package(xtensor ${xtensor_REQUIRED_VERSION} REQUIRED)
message(STATUS "Found xtensor: ${xtensor_INCLUDE_DIRS}/xtensor")
endif()
find_package(Python COMPONENTS Interpreter REQUIRED)
set(pybind11_REQUIRED_VERSION 2.6.1)
if (NOT TARGET pybind11::headers)
# Defaults to ON for cmake >= 3.18
# https://github.com/pybind/pybind11/blob/35ff42b56e9d34d9a944266eb25f2c899dbdfed7/CMakeLists.txt#L96
set(PYBIND11_FINDPYTHON OFF)
find_package(pybind11 ${pybind11_REQUIRED_VERSION} REQUIRED)
message(STATUS "Found pybind11: ${pybind11_INCLUDE_DIRS}/pybind11")
else ()
# pybind11 has a variable that indicates its version already, so use that
message(STATUS "Found pybind11 v${pybind11_VERSION}")
endif ()
# Look for NumPy headers, except if NUMPY_INCLUDE_DIRS is passed,
# which is required under some circumstances (such as wasm, where
# there is no real python executable)
if(NOT NUMPY_INCLUDE_DIRS)
find_package(NumPy REQUIRED)
endif()
message(STATUS "Found numpy: ${NUMPY_INCLUDE_DIRS}")
# Build
# =====
set(XTENSOR_PYTHON_HEADERS
${XTENSOR_PYTHON_INCLUDE_DIR}/xtensor-python/pyarray.hpp
${XTENSOR_PYTHON_INCLUDE_DIR}/xtensor-python/pyarray_backstrides.hpp
${XTENSOR_PYTHON_INCLUDE_DIR}/xtensor-python/pycontainer.hpp
${XTENSOR_PYTHON_INCLUDE_DIR}/xtensor-python/pynative_casters.hpp
${XTENSOR_PYTHON_INCLUDE_DIR}/xtensor-python/pystrides_adaptor.hpp
${XTENSOR_PYTHON_INCLUDE_DIR}/xtensor-python/pytensor.hpp
${XTENSOR_PYTHON_INCLUDE_DIR}/xtensor-python/pyvectorize.hpp
${XTENSOR_PYTHON_INCLUDE_DIR}/xtensor-python/xtensor_python_config.hpp
${XTENSOR_PYTHON_INCLUDE_DIR}/xtensor-python/xtensor_type_caster_base.hpp
)
add_library(xtensor-python INTERFACE)
target_include_directories(xtensor-python INTERFACE
"$<BUILD_INTERFACE:${XTENSOR_PYTHON_INCLUDE_DIR};${pybind11_INCLUDE_DIRS};${NUMPY_INCLUDE_DIRS}>"
$<INSTALL_INTERFACE:include>)
target_link_libraries(xtensor-python INTERFACE xtensor)
get_target_property(inc_dir xtensor-python INTERFACE_INCLUDE_DIRECTORIES)
OPTION(BUILD_TESTS "xtensor test suite" OFF)
OPTION(DOWNLOAD_GTEST "build gtest from downloaded sources" OFF)
if(DOWNLOAD_GTEST OR GTEST_SRC_DIR)
set(BUILD_TESTS ON)
endif()
if(BUILD_TESTS)
if(MSVC)
set(PYTHON_MODULE_EXTENSION ".pyd")
else()
set(PYTHON_MODULE_EXTENSION ".so")
endif()
add_subdirectory(test)
add_subdirectory(benchmark)
endif()
# Installation
# ============
include(GNUInstallDirs)
include(CMakePackageConfigHelpers)
install(TARGETS xtensor-python
EXPORT ${PROJECT_NAME}-targets)
# Makes the project importable from the build directory
export(EXPORT ${PROJECT_NAME}-targets
FILE "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Targets.cmake")
install(FILES ${XTENSOR_PYTHON_HEADERS}
DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/xtensor-python)
set(XTENSOR_PYTHON_CMAKECONFIG_INSTALL_DIR "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}" CACHE
STRING "install path for xtensor-pythonConfig.cmake")
configure_package_config_file(${PROJECT_NAME}Config.cmake.in
"${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake"
INSTALL_DESTINATION ${XTENSOR_PYTHON_CMAKECONFIG_INSTALL_DIR})
# xtensor-python is header-only and does not depend on the architecture.
# Remove CMAKE_SIZEOF_VOID_P from xtensor-pythonConfigVersion.cmake so that an xtensor-pythonConfig.cmake
# generated for a 64 bit target can be used for 32 bit targets and vice versa.
set(_XTENSOR_CMAKE_SIZEOF_VOID_P ${CMAKE_SIZEOF_VOID_P})
unset(CMAKE_SIZEOF_VOID_P)
write_basic_package_version_file(${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake
VERSION ${${PROJECT_NAME}_VERSION}
COMPATIBILITY AnyNewerVersion)
set(CMAKE_SIZEOF_VOID_P ${_XTENSOR_CMAKE_SIZEOF_VOID_P})
install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake
${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake
DESTINATION ${XTENSOR_PYTHON_CMAKECONFIG_INSTALL_DIR})
install(EXPORT ${PROJECT_NAME}-targets
FILE ${PROJECT_NAME}Targets.cmake
DESTINATION ${XTENSOR_PYTHON_CMAKECONFIG_INSTALL_DIR})