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184 lines
7.0 KiB
184 lines
7.0 KiB
# CMakeLists.txt -- Build system for the pybind11 modules
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#
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# Copyright (c) 2015 Wenzel Jakob <wenzel@inf.ethz.ch>
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#
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# All rights reserved. Use of this source code is governed by a
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# BSD-style license that can be found in the LICENSE file.
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cmake_minimum_required(VERSION 2.8.12)
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project(pybind11)
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# Check if pybind11 is being used directly or via add_subdirectory
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set(PYBIND11_MASTER_PROJECT OFF)
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if (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
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set(PYBIND11_MASTER_PROJECT ON)
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endif()
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option(PYBIND11_INSTALL "Install pybind11 header files?" ${PYBIND11_MASTER_PROJECT})
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option(PYBIND11_TEST "Build pybind11 test suite?" ${PYBIND11_MASTER_PROJECT})
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option(PYBIND11_WERROR "Report all warnings as errors" OFF)
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# Add a CMake parameter for choosing a desired Python version
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set(PYBIND11_PYTHON_VERSION "" CACHE STRING "Python version to use for compiling modules")
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list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/tools")
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set(Python_ADDITIONAL_VERSIONS 3.4 3.5 3.6 3.7)
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find_package(PythonLibsNew ${PYBIND11_PYTHON_VERSION} REQUIRED)
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include(CheckCXXCompilerFlag)
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if(NOT MSVC AND NOT PYBIND11_CPP_STANDARD)
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check_cxx_compiler_flag("-std=c++14" HAS_CPP14_FLAG)
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check_cxx_compiler_flag("-std=c++11" HAS_CPP11_FLAG)
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if (HAS_CPP14_FLAG)
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set(PYBIND11_CPP_STANDARD -std=c++14)
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elseif (HAS_CPP11_FLAG)
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set(PYBIND11_CPP_STANDARD -std=c++11)
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else()
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message(FATAL_ERROR "Unsupported compiler -- pybind11 requires C++11 support!")
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endif()
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set(PYBIND11_CPP_STANDARD ${PYBIND11_CPP_STANDARD} CACHE STRING
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"C++ standard flag, e.g. -std=c++11 or -std=c++14. Defaults to latest available." FORCE)
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endif()
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# Cache variables so pybind11_add_module can be used in parent projects
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set(PYBIND11_INCLUDE_DIR "${CMAKE_CURRENT_LIST_DIR}/include" CACHE INTERNAL "")
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set(PYTHON_INCLUDE_DIRS ${PYTHON_INCLUDE_DIRS} CACHE INTERNAL "")
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set(PYTHON_LIBRARIES ${PYTHON_LIBRARIES} CACHE INTERNAL "")
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set(PYTHON_MODULE_PREFIX ${PYTHON_MODULE_PREFIX} CACHE INTERNAL "")
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set(PYTHON_MODULE_EXTENSION ${PYTHON_MODULE_EXTENSION} CACHE INTERNAL "")
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# Build a Python extension module:
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# pybind11_add_module(<name> source1 [source2 ...])
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#
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function(pybind11_add_module target_name)
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add_library(${target_name} MODULE ${ARGN})
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target_include_directories(${target_name}
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PRIVATE ${PYBIND11_INCLUDE_DIR}
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PRIVATE ${PYTHON_INCLUDE_DIRS})
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# The prefix and extension are provided by FindPythonLibsNew.cmake
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set_target_properties(${target_name} PROPERTIES PREFIX "${PYTHON_MODULE_PREFIX}")
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set_target_properties(${target_name} PROPERTIES SUFFIX "${PYTHON_MODULE_EXTENSION}")
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if(WIN32 OR CYGWIN)
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# Link against the Python shared library on Windows
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target_link_libraries(${target_name} PRIVATE ${PYTHON_LIBRARIES})
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elseif(APPLE)
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# It's quite common to have multiple copies of the same Python version
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# installed on one's system. E.g.: one copy from the OS and another copy
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# that's statically linked into an application like Blender or Maya.
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# If we link our plugin library against the OS Python here and import it
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# into Blender or Maya later on, this will cause segfaults when multiple
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# conflicting Python instances are active at the same time (even when they
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# are of the same version).
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# Windows is not affected by this issue since it handles DLL imports
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# differently. The solution for Linux and Mac OS is simple: we just don't
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# link against the Python library. The resulting shared library will have
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# missing symbols, but that's perfectly fine -- they will be resolved at
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# import time.
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target_link_libraries(${target_name} PRIVATE "-undefined dynamic_lookup")
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endif()
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if(NOT MSVC)
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# Make sure C++11/14 are enabled
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target_compile_options(${target_name} PUBLIC ${PYBIND11_CPP_STANDARD})
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# Enable link time optimization and set the default symbol
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# visibility to hidden (very important to obtain small binaries)
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string(TOUPPER "${CMAKE_BUILD_TYPE}" U_CMAKE_BUILD_TYPE)
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if (NOT ${U_CMAKE_BUILD_TYPE} MATCHES DEBUG)
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# Check for Link Time Optimization support (GCC/Clang)
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check_cxx_compiler_flag("-flto" HAS_LTO_FLAG)
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if(HAS_LTO_FLAG AND NOT CYGWIN)
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target_compile_options(${target_name} PRIVATE -flto)
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endif()
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# Intel equivalent to LTO is called IPO
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if(CMAKE_CXX_COMPILER_ID MATCHES "Intel")
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check_cxx_compiler_flag("-ipo" HAS_IPO_FLAG)
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if(HAS_IPO_FLAG)
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target_compile_options(${target_name} PRIVATE -ipo)
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endif()
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endif()
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# Default symbol visibility
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target_compile_options(${target_name} PRIVATE "-fvisibility=hidden")
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# Strip unnecessary sections of the binary on Linux/Mac OS
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if(CMAKE_STRIP)
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if(APPLE)
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add_custom_command(TARGET ${target_name} POST_BUILD
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COMMAND ${CMAKE_STRIP} -u -r $<TARGET_FILE:${target_name}>)
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else()
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add_custom_command(TARGET ${target_name} POST_BUILD
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COMMAND ${CMAKE_STRIP} $<TARGET_FILE:${target_name}>)
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endif()
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endif()
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endif()
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elseif(MSVC)
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# /MP enables multithreaded builds (relevant when there are many files), /bigobj is
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# needed for bigger binding projects due to the limit to 64k addressable sections
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target_compile_options(${target_name} PRIVATE /MP /bigobj)
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# Enforce link time code generation on MSVC, except in debug mode
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target_compile_options(${target_name} PRIVATE $<$<NOT:$<CONFIG:Debug>>:/GL>)
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# Fancy generator expressions don't work with linker flags, for reasons unknown
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set_property(TARGET ${target_name} APPEND_STRING PROPERTY LINK_FLAGS_RELEASE /LTCG)
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set_property(TARGET ${target_name} APPEND_STRING PROPERTY LINK_FLAGS_MINSIZEREL /LTCG)
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set_property(TARGET ${target_name} APPEND_STRING PROPERTY LINK_FLAGS_RELWITHDEBINFO /LTCG)
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endif()
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endfunction()
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# Compile with compiler warnings turned on
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function(pybind11_enable_warnings target_name)
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if(MSVC)
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target_compile_options(${target_name} PRIVATE /W4)
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else()
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target_compile_options(${target_name} PRIVATE -Wall -Wextra -Wconversion)
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endif()
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if(PYBIND11_WERROR)
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if(MSVC)
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target_compile_options(${target_name} PRIVATE /WX)
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else()
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target_compile_options(${target_name} PRIVATE -Werror)
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endif()
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endif()
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endfunction()
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set(PYBIND11_HEADERS
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include/pybind11/attr.h
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include/pybind11/cast.h
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include/pybind11/chrono.h
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include/pybind11/common.h
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include/pybind11/complex.h
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include/pybind11/descr.h
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include/pybind11/options.h
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include/pybind11/eigen.h
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include/pybind11/eval.h
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include/pybind11/functional.h
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include/pybind11/numpy.h
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include/pybind11/operators.h
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include/pybind11/pybind11.h
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include/pybind11/pytypes.h
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include/pybind11/stl.h
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include/pybind11/stl_bind.h
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include/pybind11/typeid.h
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)
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string(REPLACE "include/" "${CMAKE_CURRENT_SOURCE_DIR}/include/"
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PYBIND11_HEADERS "${PYBIND11_HEADERS}")
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if (PYBIND11_TEST)
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add_subdirectory(tests)
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endif()
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if (PYBIND11_INSTALL)
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install(FILES ${PYBIND11_HEADERS} DESTINATION include/pybind11)
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endif()
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