228 lines
9.4 KiB
CMake
228 lines
9.4 KiB
CMake
|
# tools/pybind11Tools.cmake -- Build system for the pybind11 modules
|
||
|
|
#
|
||
|
|
# 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.
|
||
|
|
|
||
|
|
cmake_minimum_required(VERSION 2.8.12)
|
||
|
|
|
||
|
|
# Add a CMake parameter for choosing a desired Python version
|
||
|
|
if(NOT PYBIND11_PYTHON_VERSION)
|
||
|
|
set(PYBIND11_PYTHON_VERSION "" CACHE STRING "Python version to use for compiling modules")
|
||
|
|
endif()
|
||
|
|
|
||
|
|
set(Python_ADDITIONAL_VERSIONS 3.7 3.6 3.5 3.4)
|
||
|
|
find_package(PythonLibsNew ${PYBIND11_PYTHON_VERSION} REQUIRED)
|
||
|
|
|
||
|
|
include(CheckCXXCompilerFlag)
|
||
|
|
include(CMakeParseArguments)
|
||
|
|
|
||
|
|
if(NOT PYBIND11_CPP_STANDARD AND NOT CMAKE_CXX_STANDARD)
|
||
|
|
if(NOT MSVC)
|
||
|
|
check_cxx_compiler_flag("-std=c++14" HAS_CPP14_FLAG)
|
||
|
|
|
||
|
|
if (HAS_CPP14_FLAG)
|
||
|
|
set(PYBIND11_CPP_STANDARD -std=c++14)
|
||
|
|
else()
|
||
|
|
check_cxx_compiler_flag("-std=c++11" HAS_CPP11_FLAG)
|
||
|
|
if (HAS_CPP11_FLAG)
|
||
|
|
set(PYBIND11_CPP_STANDARD -std=c++11)
|
||
|
|
else()
|
||
|
|
message(FATAL_ERROR "Unsupported compiler -- pybind11 requires C++11 support!")
|
||
|
|
endif()
|
||
|
|
endif()
|
||
|
|
elseif(MSVC)
|
||
|
|
set(PYBIND11_CPP_STANDARD /std:c++14)
|
||
|
|
endif()
|
||
|
|
|
||
|
|
set(PYBIND11_CPP_STANDARD ${PYBIND11_CPP_STANDARD} CACHE STRING
|
||
|
|
"C++ standard flag, e.g. -std=c++11, -std=c++14, /std:c++14. Defaults to C++14 mode." FORCE)
|
||
|
|
endif()
|
||
|
|
|
||
|
|
# Checks whether the given CXX/linker flags can compile and link a cxx file. cxxflags and
|
||
|
|
# linkerflags are lists of flags to use. The result variable is a unique variable name for each set
|
||
|
|
# of flags: the compilation result will be cached base on the result variable. If the flags work,
|
||
|
|
# sets them in cxxflags_out/linkerflags_out internal cache variables (in addition to ${result}).
|
||
|
|
function(_pybind11_return_if_cxx_and_linker_flags_work result cxxflags linkerflags cxxflags_out linkerflags_out)
|
||
|
|
set(CMAKE_REQUIRED_LIBRARIES ${linkerflags})
|
||
|
|
check_cxx_compiler_flag("${cxxflags}" ${result})
|
||
|
|
if (${result})
|
||
|
|
set(${cxxflags_out} "${cxxflags}" CACHE INTERNAL "" FORCE)
|
||
|
|
set(${linkerflags_out} "${linkerflags}" CACHE INTERNAL "" FORCE)
|
||
|
|
endif()
|
||
|
|
endfunction()
|
||
|
|
|
||
|
|
# Internal: find the appropriate link time optimization flags for this compiler
|
||
|
|
function(_pybind11_add_lto_flags target_name prefer_thin_lto)
|
||
|
|
if (NOT DEFINED PYBIND11_LTO_CXX_FLAGS)
|
||
|
|
set(PYBIND11_LTO_CXX_FLAGS "" CACHE INTERNAL "")
|
||
|
|
set(PYBIND11_LTO_LINKER_FLAGS "" CACHE INTERNAL "")
|
||
|
|
|
||
|
|
if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
|
||
|
|
set(cxx_append "")
|
||
|
|
set(linker_append "")
|
||
|
|
if (CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND NOT APPLE)
|
||
|
|
# Clang Gold plugin does not support -Os; append -O3 to MinSizeRel builds to override it
|
||
|
|
set(linker_append ";$<$<CONFIG:MinSizeRel>:-O3>")
|
||
|
|
elseif(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
|
||
|
|
set(cxx_append ";-fno-fat-lto-objects")
|
||
|
|
endif()
|
||
|
|
|
||
|
|
if (CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND prefer_thin_lto)
|
||
|
|
_pybind11_return_if_cxx_and_linker_flags_work(HAS_FLTO_THIN
|
||
|
|
"-flto=thin${cxx_append}" "-flto=thin${linker_append}"
|
||
|
|
PYBIND11_LTO_CXX_FLAGS PYBIND11_LTO_LINKER_FLAGS)
|
||
|
|
endif()
|
||
|
|
|
||
|
|
if (NOT HAS_FLTO_THIN)
|
||
|
|
_pybind11_return_if_cxx_and_linker_flags_work(HAS_FLTO
|
||
|
|
"-flto${cxx_append}" "-flto${linker_append}"
|
||
|
|
PYBIND11_LTO_CXX_FLAGS PYBIND11_LTO_LINKER_FLAGS)
|
||
|
|
endif()
|
||
|
|
elseif (CMAKE_CXX_COMPILER_ID MATCHES "Intel")
|
||
|
|
# Intel equivalent to LTO is called IPO
|
||
|
|
_pybind11_return_if_cxx_and_linker_flags_work(HAS_INTEL_IPO
|
||
|
|
"-ipo" "-ipo" PYBIND11_LTO_CXX_FLAGS PYBIND11_LTO_LINKER_FLAGS)
|
||
|
|
elseif(MSVC)
|
||
|
|
# cmake only interprets libraries as linker flags when they start with a - (otherwise it
|
||
|
|
# converts /LTCG to \LTCG as if it was a Windows path). Luckily MSVC supports passing flags
|
||
|
|
# with - instead of /, even if it is a bit non-standard:
|
||
|
|
_pybind11_return_if_cxx_and_linker_flags_work(HAS_MSVC_GL_LTCG
|
||
|
|
"/GL" "-LTCG" PYBIND11_LTO_CXX_FLAGS PYBIND11_LTO_LINKER_FLAGS)
|
||
|
|
endif()
|
||
|
|
|
||
|
|
if (PYBIND11_LTO_CXX_FLAGS)
|
||
|
|
message(STATUS "LTO enabled")
|
||
|
|
else()
|
||
|
|
message(STATUS "LTO disabled (not supported by the compiler and/or linker)")
|
||
|
|
endif()
|
||
|
|
endif()
|
||
|
|
|
||
|
|
# Enable LTO flags if found, except for Debug builds
|
||
|
|
if (PYBIND11_LTO_CXX_FLAGS)
|
||
|
|
target_compile_options(${target_name} PRIVATE "$<$<NOT:$<CONFIG:Debug>>:${PYBIND11_LTO_CXX_FLAGS}>")
|
||
|
|
endif()
|
||
|
|
if (PYBIND11_LTO_LINKER_FLAGS)
|
||
|
|
target_link_libraries(${target_name} PRIVATE "$<$<NOT:$<CONFIG:Debug>>:${PYBIND11_LTO_LINKER_FLAGS}>")
|
||
|
|
endif()
|
||
|
|
endfunction()
|
||
|
|
|
||
|
|
# Build a Python extension module:
|
||
|
|
# pybind11_add_module(<name> [MODULE | SHARED] [EXCLUDE_FROM_ALL]
|
||
|
|
# [NO_EXTRAS] [SYSTEM] [THIN_LTO] source1 [source2 ...])
|
||
|
|
#
|
||
|
|
function(pybind11_add_module target_name)
|
||
|
|
set(options MODULE SHARED EXCLUDE_FROM_ALL NO_EXTRAS SYSTEM THIN_LTO)
|
||
|
|
cmake_parse_arguments(ARG "${options}" "" "" ${ARGN})
|
||
|
|
|
||
|
|
if(ARG_MODULE AND ARG_SHARED)
|
||
|
|
message(FATAL_ERROR "Can't be both MODULE and SHARED")
|
||
|
|
elseif(ARG_SHARED)
|
||
|
|
set(lib_type SHARED)
|
||
|
|
else()
|
||
|
|
set(lib_type MODULE)
|
||
|
|
endif()
|
||
|
|
|
||
|
|
if(ARG_EXCLUDE_FROM_ALL)
|
||
|
|
set(exclude_from_all EXCLUDE_FROM_ALL)
|
||
|
|
endif()
|
||
|
|
|
||
|
|
add_library(${target_name} ${lib_type} ${exclude_from_all} ${ARG_UNPARSED_ARGUMENTS})
|
||
|
|
|
||
|
|
if(ARG_SYSTEM)
|
||
|
|
set(inc_isystem SYSTEM)
|
||
|
|
endif()
|
||
|
|
|
||
|
|
target_include_directories(${target_name} ${inc_isystem}
|
||
|
|
PRIVATE ${PYBIND11_INCLUDE_DIR} # from project CMakeLists.txt
|
||
|
|
PRIVATE ${pybind11_INCLUDE_DIR} # from pybind11Config
|
||
|
|
PRIVATE ${PYTHON_INCLUDE_DIRS})
|
||
|
|
|
||
|
|
# Python debug libraries expose slightly different objects
|
||
|
|
# https://docs.python.org/3.6/c-api/intro.html#debugging-builds
|
||
|
|
# https://stackoverflow.com/questions/39161202/how-to-work-around-missing-pymodule-create2-in-amd64-win-python35-d-lib
|
||
|
|
if(PYTHON_IS_DEBUG)
|
||
|
|
target_compile_definitions(${target_name} PRIVATE Py_DEBUG)
|
||
|
|
endif()
|
||
|
|
|
||
|
|
# The prefix and extension are provided by FindPythonLibsNew.cmake
|
||
|
|
set_target_properties(${target_name} PROPERTIES PREFIX "${PYTHON_MODULE_PREFIX}")
|
||
|
|
set_target_properties(${target_name} PROPERTIES SUFFIX "${PYTHON_MODULE_EXTENSION}")
|
||
|
|
|
||
|
|
# -fvisibility=hidden is required to allow multiple modules compiled against
|
||
|
|
# different pybind versions to work properly, and for some features (e.g.
|
||
|
|
# py::module_local). We force it on everything inside the `pybind11`
|
||
|
|
# namespace; also turning it on for a pybind module compilation here avoids
|
||
|
|
# potential warnings or issues from having mixed hidden/non-hidden types.
|
||
|
|
set_target_properties(${target_name} PROPERTIES CXX_VISIBILITY_PRESET "hidden")
|
||
|
|
set_target_properties(${target_name} PROPERTIES CUDA_VISIBILITY_PRESET "hidden")
|
||
|
|
|
||
|
|
if(WIN32 OR CYGWIN)
|
||
|
|
# Link against the Python shared library on Windows
|
||
|
|
target_link_libraries(${target_name} PRIVATE ${PYTHON_LIBRARIES})
|
||
|
|
elseif(APPLE)
|
||
|
|
# It's quite common to have multiple copies of the same Python version
|
||
|
|
# installed on one's system. E.g.: one copy from the OS and another copy
|
||
|
|
# that's statically linked into an application like Blender or Maya.
|
||
|
|
# If we link our plugin library against the OS Python here and import it
|
||
|
|
# into Blender or Maya later on, this will cause segfaults when multiple
|
||
|
|
# conflicting Python instances are active at the same time (even when they
|
||
|
|
# are of the same version).
|
||
|
|
|
||
|
|
# Windows is not affected by this issue since it handles DLL imports
|
||
|
|
# differently. The solution for Linux and Mac OS is simple: we just don't
|
||
|
|
# link against the Python library. The resulting shared library will have
|
||
|
|
# missing symbols, but that's perfectly fine -- they will be resolved at
|
||
|
|
# import time.
|
||
|
|
|
||
|
|
target_link_libraries(${target_name} PRIVATE "-undefined dynamic_lookup")
|
||
|
|
|
||
|
|
if(ARG_SHARED)
|
||
|
|
# Suppress CMake >= 3.0 warning for shared libraries
|
||
|
|
set_target_properties(${target_name} PROPERTIES MACOSX_RPATH ON)
|
||
|
|
endif()
|
||
|
|
endif()
|
||
|
|
|
||
|
|
# Make sure C++11/14 are enabled
|
||
|
|
if(CMAKE_VERSION VERSION_LESS 3.3)
|
||
|
|
target_compile_options(${target_name} PUBLIC ${PYBIND11_CPP_STANDARD})
|
||
|
|
else()
|
||
|
|
target_compile_options(${target_name} PUBLIC $<$<COMPILE_LANGUAGE:CXX>:${PYBIND11_CPP_STANDARD}>)
|
||
|
|
endif()
|
||
|
|
|
||
|
|
if(ARG_NO_EXTRAS)
|
||
|
|
return()
|
||
|
|
endif()
|
||
|
|
|
||
|
|
_pybind11_add_lto_flags(${target_name} ${ARG_THIN_LTO})
|
||
|
|
|
||
|
|
if (NOT MSVC AND NOT ${CMAKE_BUILD_TYPE} MATCHES Debug)
|
||
|
|
# Strip unnecessary sections of the binary on Linux/Mac OS
|
||
|
|
if(CMAKE_STRIP)
|
||
|
|
if(APPLE)
|
||
|
|
add_custom_command(TARGET ${target_name} POST_BUILD
|
||
|
|
COMMAND ${CMAKE_STRIP} -x $<TARGET_FILE:${target_name}>)
|
||
|
|
else()
|
||
|
|
add_custom_command(TARGET ${target_name} POST_BUILD
|
||
|
|
COMMAND ${CMAKE_STRIP} $<TARGET_FILE:${target_name}>)
|
||
|
|
endif()
|
||
|
|
endif()
|
||
|
|
endif()
|
||
|
|
|
||
|
|
if(MSVC)
|
||
|
|
# /MP enables multithreaded builds (relevant when there are many files), /bigobj is
|
||
|
|
# needed for bigger binding projects due to the limit to 64k addressable sections
|
||
|
|
target_compile_options(${target_name} PRIVATE /bigobj)
|
||
|
|
if(CMAKE_VERSION VERSION_LESS 3.11)
|
||
|
|
target_compile_options(${target_name} PRIVATE $<$<NOT:$<CONFIG:Debug>>:/MP>)
|
||
|
|
else()
|
||
|
|
# Only set these options for C++ files. This is important so that, for
|
||
|
|
# instance, projects that include other types of source files like CUDA
|
||
|
|
# .cu files don't get these options propagated to nvcc since that would
|
||
|
|
# cause the build to fail.
|
||
|
|
target_compile_options(${target_name} PRIVATE $<$<NOT:$<CONFIG:Debug>>:$<$<COMPILE_LANGUAGE:CXX>:/MP>>)
|
||
|
|
endif()
|
||
|
|
endif()
|
||
|
|
endfunction()
|