CMakeLists.txt 15.5 KB
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# CMakeLists.txt -- Build system for the pybind11 test suite
#
# Copyright (c) 2015 Wenzel Jakob <wenzel@inf.ethz.ch>
#
# All rights reserved. Use of this source code is governed by a
# BSD-style license that can be found in the LICENSE file.

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cmake_minimum_required(VERSION 3.4)
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# The `cmake_minimum_required(VERSION 3.4...3.18)` syntax does not work with
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# some versions of VS that have a patched CMake 3.11. This forces us to emulate
# the behavior using the following workaround:
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if(${CMAKE_VERSION} VERSION_LESS 3.18)
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  cmake_policy(VERSION ${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION})
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else()
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  cmake_policy(VERSION 3.18)
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endif()

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# Only needed for CMake < 3.5 support
include(CMakeParseArguments)

# Filter out items; print an optional message if any items filtered
#
# Usage:
#   pybind11_filter_tests(LISTNAME file1.cpp file2.cpp ... MESSAGE "")
#
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macro(pybind11_filter_tests LISTNAME)
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  cmake_parse_arguments(ARG "" "MESSAGE" "" ${ARGN})
  set(PYBIND11_FILTER_TESTS_FOUND OFF)
  foreach(filename IN LISTS ARG_UNPARSED_ARGUMENTS)
    list(FIND ${LISTNAME} ${filename} _FILE_FOUND)
    if(_FILE_FOUND GREATER -1)
      list(REMOVE_AT ${LISTNAME} ${_FILE_FOUND})
      set(PYBIND11_FILTER_TESTS_FOUND ON)
    endif()
  endforeach()
  if(PYBIND11_FILTER_TESTS_FOUND AND ARG_MESSAGE)
    message(STATUS "${ARG_MESSAGE}")
  endif()
endmacro()

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macro(possibly_uninitialized)
  foreach(VARNAME ${ARGN})
    if(NOT DEFINED "${VARNAME}")
      set("${VARNAME}" "")
    endif()
  endforeach()
endmacro()

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# New Python support
if(DEFINED Python_EXECUTABLE)
  set(PYTHON_EXECUTABLE "${Python_EXECUTABLE}")
  set(PYTHON_VERSION "${Python_VERSION}")
endif()

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# There's no harm in including a project in a project
project(pybind11_tests CXX)
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# Access FindCatch and more
list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/../tools")

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option(PYBIND11_WERROR "Report all warnings as errors" OFF)
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option(DOWNLOAD_EIGEN "Download EIGEN (requires CMake 3.11+)" OFF)
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option(PYBIND11_CUDA_TESTS "Enable building CUDA tests (requires CMake 3.12+)" OFF)
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set(PYBIND11_TEST_OVERRIDE
    ""
    CACHE STRING "Tests from ;-separated list of *.cpp files will be built instead of all tests")
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set(PYBIND11_TEST_FILTER
    ""
    CACHE STRING "Tests from ;-separated list of *.cpp files will be removed from all tests")
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if(CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
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  # We're being loaded directly, i.e. not via add_subdirectory, so make this
  # work as its own project and load the pybind11Config to get the tools we need
  find_package(pybind11 REQUIRED CONFIG)
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endif()

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if(NOT CMAKE_BUILD_TYPE AND NOT DEFINED CMAKE_CONFIGURATION_TYPES)
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  message(STATUS "Setting tests build type to MinSizeRel as none was specified")
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  set(CMAKE_BUILD_TYPE
      MinSizeRel
      CACHE STRING "Choose the type of build." FORCE)
  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release" "MinSizeRel"
                                               "RelWithDebInfo")
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endif()

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if(PYBIND11_CUDA_TESTS)
  enable_language(CUDA)
  if(DEFINED CMAKE_CXX_STANDARD)
    set(CMAKE_CUDA_STANDARD ${CMAKE_CXX_STANDARD})
  endif()
  set(CMAKE_CUDA_STANDARD_REQUIRED ON)
endif()

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# Full set of test files (you can override these; see below)
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set(PYBIND11_TEST_FILES
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    test_async.cpp
    test_buffers.cpp
    test_builtin_casters.cpp
    test_call_policies.cpp
    test_callbacks.cpp
    test_chrono.cpp
    test_class.cpp
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    test_class_sh_basic.cpp
    test_class_sh_inheritance.cpp
    test_class_sh_unique_ptr_member.cpp
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    test_constants_and_functions.cpp
    test_copy_move.cpp
    test_custom_type_casters.cpp
    test_docstring_options.cpp
    test_eigen.cpp
    test_enum.cpp
    test_eval.cpp
    test_exceptions.cpp
    test_factory_constructors.cpp
    test_gil_scoped.cpp
    test_iostream.cpp
    test_kwargs_and_defaults.cpp
    test_local_bindings.cpp
    test_methods_and_attributes.cpp
    test_modules.cpp
    test_multiple_inheritance.cpp
    test_numpy_array.cpp
    test_numpy_dtypes.cpp
    test_numpy_vectorize.cpp
    test_opaque_types.cpp
    test_operator_overloading.cpp
    test_pickling.cpp
    test_pytypes.cpp
    test_sequences_and_iterators.cpp
    test_smart_ptr.cpp
    test_stl.cpp
    test_stl_binders.cpp
    test_tagbased_polymorphic.cpp
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    test_type_caster_bare_interface.cpp
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    test_union.cpp
    test_virtual_functions.cpp)
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# Invoking cmake with something like:
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#     cmake -DPYBIND11_TEST_OVERRIDE="test_callbacks.cpp;test_pickling.cpp" ..
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# lets you override the tests that get compiled and run.  You can restore to all tests with:
#     cmake -DPYBIND11_TEST_OVERRIDE= ..
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if(PYBIND11_TEST_OVERRIDE)
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  set(PYBIND11_TEST_FILES ${PYBIND11_TEST_OVERRIDE})
endif()

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# You can also filter tests:
if(PYBIND11_TEST_FILTER)
  pybind11_filter_tests(PYBIND11_TEST_FILES ${PYBIND11_TEST_FILTER})
endif()

if(PYTHON_VERSION VERSION_LESS 3.5)
  pybind11_filter_tests(PYBIND11_TEST_FILES test_async.cpp MESSAGE
                        "Skipping test_async on Python 2")
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endif()

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# Skip tests for CUDA check:
# /pybind11/tests/test_constants_and_functions.cpp(125):
#   error: incompatible exception specifications
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if(PYBIND11_CUDA_TESTS)
  pybind11_filter_tests(
    PYBIND11_TEST_FILES test_constants_and_functions.cpp MESSAGE
    "Skipping test_constants_and_functions due to incompatible exception specifications")
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endif()

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string(REPLACE ".cpp" ".py" PYBIND11_PYTEST_FILES "${PYBIND11_TEST_FILES}")
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# Contains the set of test files that require pybind11_cross_module_tests to be
# built; if none of these are built (i.e. because TEST_OVERRIDE is used and
# doesn't include them) the second module doesn't get built.
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set(PYBIND11_CROSS_MODULE_TESTS test_exceptions.py test_local_bindings.py test_stl.py
                                test_stl_binders.py)
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set(PYBIND11_CROSS_MODULE_GIL_TESTS test_gil_scoped.py)
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set(PYBIND11_CLASS_SH_MODULE_LOCAL_TESTS test_class_sh_module_local.py)

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# Check if Eigen is available; if not, remove from PYBIND11_TEST_FILES (but
# keep it in PYBIND11_PYTEST_FILES, so that we get the "eigen is not installed"
# skip message).
list(FIND PYBIND11_TEST_FILES test_eigen.cpp PYBIND11_TEST_FILES_EIGEN_I)
if(PYBIND11_TEST_FILES_EIGEN_I GREATER -1)
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  # Try loading via newer Eigen's Eigen3Config first (bypassing tools/FindEigen3.cmake).
  # Eigen 3.3.1+ exports a cmake 3.0+ target for handling dependency requirements, but also
  # produces a fatal error if loaded from a pre-3.0 cmake.
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  if(DOWNLOAD_EIGEN)
    if(CMAKE_VERSION VERSION_LESS 3.11)
      message(FATAL_ERROR "CMake 3.11+ required when using DOWNLOAD_EIGEN")
    endif()

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    set(EIGEN3_VERSION_STRING "3.3.8")
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    include(FetchContent)
    FetchContent_Declare(
      eigen
      GIT_REPOSITORY https://gitlab.com/libeigen/eigen.git
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      GIT_TAG ${EIGEN3_VERSION_STRING})
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    FetchContent_GetProperties(eigen)
    if(NOT eigen_POPULATED)
      message(STATUS "Downloading Eigen")
      FetchContent_Populate(eigen)
    endif()

    set(EIGEN3_INCLUDE_DIR ${eigen_SOURCE_DIR})
    set(EIGEN3_FOUND TRUE)
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  else()
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    find_package(Eigen3 3.2.7 QUIET CONFIG)

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    if(NOT EIGEN3_FOUND)
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      # Couldn't load via target, so fall back to allowing module mode finding, which will pick up
      # tools/FindEigen3.cmake
      find_package(Eigen3 3.2.7 QUIET)
    endif()
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  endif()
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  if(EIGEN3_FOUND)
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    if(NOT TARGET Eigen3::Eigen)
      add_library(Eigen3::Eigen IMPORTED INTERFACE)
      set_property(TARGET Eigen3::Eigen PROPERTY INTERFACE_INCLUDE_DIRECTORIES
                                                 "${EIGEN3_INCLUDE_DIR}")
    endif()

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    # Eigen 3.3.1+ cmake sets EIGEN3_VERSION_STRING (and hard codes the version when installed
    # rather than looking it up in the cmake script); older versions, and the
    # tools/FindEigen3.cmake, set EIGEN3_VERSION instead.
    if(NOT EIGEN3_VERSION AND EIGEN3_VERSION_STRING)
      set(EIGEN3_VERSION ${EIGEN3_VERSION_STRING})
    endif()
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    message(STATUS "Building tests with Eigen v${EIGEN3_VERSION}")
  else()
    list(REMOVE_AT PYBIND11_TEST_FILES ${PYBIND11_TEST_FILES_EIGEN_I})
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    message(STATUS "Building tests WITHOUT Eigen, use -DDOWNLOAD_EIGEN on CMake 3.11+ to download")
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  endif()
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endif()

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# Optional dependency for some tests (boost::variant is only supported with version >= 1.56)
find_package(Boost 1.56)
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if(Boost_FOUND)
  if(NOT TARGET Boost::headers)
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    add_library(Boost::headers IMPORTED INTERFACE)
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    if(TARGET Boost::boost)
      # Classic FindBoost
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      set_property(TARGET Boost::boost PROPERTY INTERFACE_LINK_LIBRARIES Boost::boost)
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    else()
      # Very old FindBoost, or newer Boost than CMake in older CMakes
      set_property(TARGET Boost::headers PROPERTY INTERFACE_INCLUDE_DIRECTORIES
                                                  ${Boost_INCLUDE_DIRS})
    endif()
  endif()
endif()

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# Compile with compiler warnings turned on
function(pybind11_enable_warnings target_name)
  if(MSVC)
    target_compile_options(${target_name} PRIVATE /W4)
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  elseif(CMAKE_CXX_COMPILER_ID MATCHES "(GNU|Intel|Clang)" AND NOT PYBIND11_CUDA_TESTS)
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    target_compile_options(
      ${target_name}
      PRIVATE -Wall
              -Wextra
              -Wconversion
              -Wcast-qual
              -Wdeprecated
              -Wundef
              -Wnon-virtual-dtor)
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  endif()

  if(PYBIND11_WERROR)
    if(MSVC)
      target_compile_options(${target_name} PRIVATE /WX)
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    elseif(PYBIND11_CUDA_TESTS)
      target_compile_options(${target_name} PRIVATE "SHELL:-Werror all-warnings")
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    elseif(CMAKE_CXX_COMPILER_ID MATCHES "(GNU|Intel|Clang)")
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      target_compile_options(${target_name} PRIVATE -Werror)
    endif()
  endif()
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  # Needs to be readded since the ordering requires these to be after the ones above
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  if(CMAKE_CXX_STANDARD
     AND CMAKE_CXX_COMPILER_ID MATCHES "Clang"
     AND PYTHON_VERSION VERSION_LESS 3.0)
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    if(CMAKE_CXX_STANDARD LESS 17)
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      target_compile_options(${target_name} PUBLIC -Wno-deprecated-register)
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    else()
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      target_compile_options(${target_name} PUBLIC -Wno-register)
    endif()
  endif()
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endfunction()

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set(test_targets pybind11_tests)
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# Build pybind11_cross_module_tests if any test_whatever.py are being built that require it
foreach(t ${PYBIND11_CROSS_MODULE_TESTS})
  list(FIND PYBIND11_PYTEST_FILES ${t} i)
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  if(i GREATER -1)
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    list(APPEND test_targets pybind11_cross_module_tests)
    break()
  endif()
endforeach()
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foreach(t ${PYBIND11_CROSS_MODULE_GIL_TESTS})
  list(FIND PYBIND11_PYTEST_FILES ${t} i)
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  if(i GREATER -1)
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    list(APPEND test_targets cross_module_gil_utils)
    break()
  endif()
endforeach()

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foreach(t ${PYBIND11_CLASS_SH_MODULE_LOCAL_TESTS})
  list(FIND PYBIND11_PYTEST_FILES ${t} i)
  if(i GREATER -1)
    list(APPEND test_targets class_sh_module_local_0)
    list(APPEND test_targets class_sh_module_local_1)
    list(APPEND test_targets class_sh_module_local_2)
    break()
  endif()
endforeach()

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# Support CUDA testing by forcing the target file to compile with NVCC
if(PYBIND11_CUDA_TESTS)
  set_property(SOURCE ${PYBIND11_TEST_FILES} PROPERTY LANGUAGE CUDA)
endif()

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foreach(target ${test_targets})
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  set(test_files ${PYBIND11_TEST_FILES})
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  if(NOT "${target}" STREQUAL "pybind11_tests")
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    set(test_files "")
  endif()
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  # Support CUDA testing by forcing the target file to compile with NVCC
  if(PYBIND11_CUDA_TESTS)
    set_property(SOURCE ${target}.cpp PROPERTY LANGUAGE CUDA)
  endif()

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  # Create the binding library
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  pybind11_add_module(${target} THIN_LTO ${target}.cpp ${test_files} ${PYBIND11_HEADERS})
  pybind11_enable_warnings(${target})
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  if(NOT CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_CURRENT_BINARY_DIR)
    get_property(
      suffix
      TARGET ${target}
      PROPERTY SUFFIX)
    set(source_output "${CMAKE_CURRENT_SOURCE_DIR}/${target}${suffix}")
    if(suffix AND EXISTS "${source_output}")
      message(WARNING "Output file also in source directory; "
                      "please remove to avoid confusion: ${source_output}")
    endif()
  endif()

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  if(MSVC)
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    target_compile_options(${target} PRIVATE /utf-8)
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  endif()
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  if(EIGEN3_FOUND)
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    target_link_libraries(${target} PRIVATE Eigen3::Eigen)
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    target_compile_definitions(${target} PRIVATE -DPYBIND11_TEST_EIGEN)
  endif()

  if(Boost_FOUND)
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    target_link_libraries(${target} PRIVATE Boost::headers)
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    target_compile_definitions(${target} PRIVATE -DPYBIND11_TEST_BOOST)
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  endif()
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  # Always write the output file directly into the 'tests' directory (even on MSVC)
  if(NOT CMAKE_LIBRARY_OUTPUT_DIRECTORY)
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    set_target_properties(${target} PROPERTIES LIBRARY_OUTPUT_DIRECTORY
                                               "${CMAKE_CURRENT_BINARY_DIR}")
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    if(DEFINED CMAKE_CONFIGURATION_TYPES)
      foreach(config ${CMAKE_CONFIGURATION_TYPES})
        string(TOUPPER ${config} config)
        set_target_properties(${target} PROPERTIES LIBRARY_OUTPUT_DIRECTORY_${config}
                                                   "${CMAKE_CURRENT_BINARY_DIR}")
      endforeach()
    endif()
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  endif()
endforeach()
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# Make sure pytest is found or produce a warning
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pybind11_find_import(pytest VERSION 3.1)
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if(NOT CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_CURRENT_BINARY_DIR)
  # This is not used later in the build, so it's okay to regenerate each time.
  configure_file("${CMAKE_CURRENT_SOURCE_DIR}/pytest.ini" "${CMAKE_CURRENT_BINARY_DIR}/pytest.ini"
                 COPYONLY)
  file(APPEND "${CMAKE_CURRENT_BINARY_DIR}/pytest.ini"
       "\ntestpaths = \"${CMAKE_CURRENT_SOURCE_DIR}\"")

endif()

# cmake 3.12 added list(transform <list> prepend
# but we can't use it yet
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string(REPLACE "test_" "${CMAKE_CURRENT_SOURCE_DIR}/test_" PYBIND11_ABS_PYTEST_FILES
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               "${PYBIND11_PYTEST_FILES}")

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set(PYBIND11_TEST_PREFIX_COMMAND
    ""
    CACHE STRING "Put this before pytest, use for checkers and such")

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# A single command to compile and run the tests
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add_custom_target(
  pytest
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  COMMAND ${PYBIND11_TEST_PREFIX_COMMAND} ${PYTHON_EXECUTABLE} -m pytest
          ${PYBIND11_ABS_PYTEST_FILES}
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  DEPENDS ${test_targets}
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  WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}"
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  USES_TERMINAL)
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if(PYBIND11_TEST_OVERRIDE)
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  add_custom_command(
    TARGET pytest
    POST_BUILD
    COMMAND ${CMAKE_COMMAND} -E echo
            "Note: not all tests run: -DPYBIND11_TEST_OVERRIDE is in effect")
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endif()

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# cmake-format: off
add_custom_target(
  memcheck
  COMMAND
    PYTHONMALLOC=malloc
    valgrind
    --leak-check=full
    --show-leak-kinds=definite,indirect
    --errors-for-leak-kinds=definite,indirect
    --error-exitcode=1
    --read-var-info=yes
    --track-origins=yes
    --suppressions="${CMAKE_CURRENT_SOURCE_DIR}/valgrind-python.supp"
    --suppressions="${CMAKE_CURRENT_SOURCE_DIR}/valgrind-numpy-scipy.supp"
    --gen-suppressions=all
    ${PYTHON_EXECUTABLE} -m pytest ${PYBIND11_ABS_PYTEST_FILES}
  DEPENDS ${test_targets}
  WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}"
  USES_TERMINAL)
# cmake-format: on

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# Add a check target to run all the tests, starting with pytest (we add dependencies to this below)
add_custom_target(check DEPENDS pytest)

# The remaining tests only apply when being built as part of the pybind11 project, but not if the
# tests are being built independently.
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if(CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
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  return()
endif()

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# Add a post-build comment to show the primary test suite .so size and, if a previous size, compare it:
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add_custom_command(
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  TARGET pybind11_tests
  POST_BUILD
  COMMAND
    ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/../tools/libsize.py
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    $<TARGET_FILE:pybind11_tests>
    ${CMAKE_CURRENT_BINARY_DIR}/sosize-$<TARGET_FILE_NAME:pybind11_tests>.txt)
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if(NOT PYBIND11_CUDA_TESTS)
  # Test embedding the interpreter. Provides the `cpptest` target.
  add_subdirectory(test_embed)
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  # Test CMake build using functions and targets from subdirectory or installed location
  add_subdirectory(test_cmake_build)
endif()