mirror of
https://github.com/pybind/pybind11.git
synced 2024-11-28 16:11:59 +00:00
103 lines
4.3 KiB
ReStructuredText
103 lines
4.3 KiB
ReStructuredText
.. _cmake:
|
|
|
|
Building with CMake
|
|
===================
|
|
|
|
The following snippet should be a good starting point to create bindings across
|
|
platforms. It assumes that the code is located in a file named :file:`example.cpp`,
|
|
and that the pybind11 repository is located in a subdirectory named :file:`pybind11`.
|
|
|
|
.. code-block:: cmake
|
|
|
|
cmake_minimum_required(VERSION 2.8)
|
|
|
|
project(example)
|
|
|
|
# Add a CMake parameter for choosing a desired Python version
|
|
set(EXAMPLE_PYTHON_VERSION "" CACHE STRING "Python version to use for compiling the example library")
|
|
|
|
# Set a default build configuration if none is specified. 'MinSizeRel' produces the smallest binaries
|
|
if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
|
|
message(STATUS "Setting build type to 'MinSizeRel' as none was specified.")
|
|
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")
|
|
endif()
|
|
string(TOUPPER "${CMAKE_BUILD_TYPE}" U_CMAKE_BUILD_TYPE)
|
|
|
|
# Try to autodetect Python (can be overridden manually if needed)
|
|
set(Python_ADDITIONAL_VERSIONS 3.4 3.5 3.6)
|
|
find_package(PythonLibs ${EXAMPLE_PYTHON_VERSION} REQUIRED)
|
|
|
|
if (UNIX)
|
|
# Enable C++11 mode
|
|
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
|
|
|
|
# Enable link time optimization and set the default symbol
|
|
# visibility to hidden (very important to obtain small binaries)
|
|
if (NOT ${U_CMAKE_BUILD_TYPE} MATCHES DEBUG)
|
|
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility=hidden -flto")
|
|
endif()
|
|
endif()
|
|
|
|
# Include path for Python header files
|
|
include_directories(${PYTHON_INCLUDE_DIR})
|
|
|
|
# Include path for pybind11 header files -- this may need to be changed depending on your setup
|
|
include_directories(${PROJECT_SOURCE_DIR}/pybind11/include)
|
|
|
|
# Create the binding library
|
|
add_library(example SHARED
|
|
example.cpp
|
|
# ... extra files go here ...
|
|
)
|
|
|
|
# Don't add a 'lib' prefix to the shared library
|
|
set_target_properties(example PROPERTIES PREFIX "")
|
|
|
|
if (WIN32)
|
|
if (MSVC)
|
|
# Enforce size-based optimization and link time code generation
|
|
# on MSVC (~30% smaller binaries in experiments). /bigobj is needed
|
|
# for bigger binding projects due to the limit to 64k addressable sections
|
|
# /MP enables multithreaded builds (relevant when there are many files).
|
|
set_target_properties(example PROPERTIES COMPILE_FLAGS "/Os /GL /MP /bigobj")
|
|
set_target_properties(example PROPERTIES LINK_FLAGS "/LTCG")
|
|
endif()
|
|
|
|
# .PYD file extension on Windows
|
|
set_target_properties(example PROPERTIES SUFFIX ".pyd")
|
|
|
|
# Link against the Python shared library
|
|
target_link_libraries(example ${PYTHON_LIBRARY})
|
|
elseif (UNIX)
|
|
# 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.
|
|
|
|
# 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.
|
|
|
|
# .SO file extension on Linux/Mac OS
|
|
set_target_properties(example PROPERTIES SUFFIX ".so")
|
|
|
|
# Strip unnecessary sections of the binary on Linux/Mac OS
|
|
if(APPLE)
|
|
set_target_properties(example PROPERTIES MACOSX_RPATH ".")
|
|
set_target_properties(example PROPERTIES LINK_FLAGS "-undefined dynamic_lookup -dead_strip")
|
|
if (NOT ${U_CMAKE_BUILD_TYPE} MATCHES DEBUG)
|
|
add_custom_command(TARGET example POST_BUILD COMMAND strip -u -r ${PROJECT_BINARY_DIR}/example.so)
|
|
endif()
|
|
else()
|
|
if (NOT ${U_CMAKE_BUILD_TYPE} MATCHES DEBUG)
|
|
add_custom_command(TARGET example POST_BUILD COMMAND strip ${PROJECT_BINARY_DIR}/example.so)
|
|
endif()
|
|
endif()
|
|
endif()
|