mirror of https://github.com/pybind/pybind11.git
Add CMake function pybind11_add_module()
The function creates a pybind11 module using the specified source files.
This commit is contained in:
Dean Moldovan
parent
928fff649f
commit
4563e9a8cd
124
CMakeLists.txt
124
CMakeLists.txt
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@ -5,7 +5,7 @@
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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)
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cmake_minimum_required(VERSION 2.8.12)
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project(pybind11)
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@ -30,23 +30,9 @@ set(Python_ADDITIONAL_VERSIONS 3.4 3.5 3.6 3.7)
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find_package(PythonLibsNew ${PYBIND11_PYTHON_VERSION} REQUIRED)
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if (CMAKE_CXX_COMPILER_ID MATCHES "Clang" OR CMAKE_CXX_COMPILER_ID MATCHES "GNU" OR CMAKE_CXX_COMPILER_ID MATCHES "Intel")
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CHECK_CXX_COMPILER_FLAG("-std=c++14" HAS_CPP14_FLAG)
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CHECK_CXX_COMPILER_FLAG("-std=c++11" HAS_CPP11_FLAG)
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if (HAS_CPP14_FLAG)
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14")
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elseif (HAS_CPP11_FLAG)
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -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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# 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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if (NOT ${U_CMAKE_BUILD_TYPE} MATCHES DEBUG)
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# Default symbol visibility
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility=hidden")
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# Check for Link Time Optimization support
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# (GCC/Clang)
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CHECK_CXX_COMPILER_FLAG("-flto" HAS_LTO_FLAG)
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@ -75,15 +61,64 @@ elseif ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" OR "${CMAKE_CXX_COMPILER_ID}"
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra")
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endif()
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# Cache variables so pybind11_add_module can be used in parent projects
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set(PYBIND11_INCLUDE_DIR "${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_MODULE_PREFIX ${PYTHON_MODULE_PREFIX} CACHE INTERNAL "")
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set(PYTHON_MODULE_EXTENSION ${PYTHON_MODULE_EXTENSION} CACHE INTERNAL "")
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# Check if Eigen is available
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find_package(Eigen3 QUIET)
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# Build a Python extension module:
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# pybind11_add_module(<name> source1 [source2 ...])
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#
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function(pybind11_add_module target_name)
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add_library(${target_name} MODULE ${ARGN})
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target_include_directories(${target_name} PUBLIC ${PYBIND11_INCLUDE_DIR} ${PYTHON_INCLUDE_DIRS})
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# Include path for pybind11 header files
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include_directories(include)
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# The prefix and extension are provided by FindPythonLibsNew.cmake
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set_target_properties(${target_name} PROPERTIES PREFIX "${PYTHON_MODULE_PREFIX}")
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set_target_properties(${target_name} PROPERTIES SUFFIX "${PYTHON_MODULE_EXTENSION}")
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# Include path for Python header files
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include_directories(${PYTHON_INCLUDE_DIRS})
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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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if(MSVC)
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target_link_libraries(${target_name} ${PYTHON_LIBRARIES})
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elseif(APPLE)
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# Make sure OS X does not have any issues with missing symbols
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set_target_properties(${target_name} PROPERTIES MACOSX_RPATH ".")
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target_link_libraries(${target_name} PRIVATE "-undefined dynamic_lookup")
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endif()
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# Make sure C++11/14 are enabled
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if(NOT MSVC)
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check_cxx_compiler_flag("-std=c++14" HAS_CPP14_FLAG)
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check_cxx_compiler_flag("-std=c++11" HAS_CPP11_FLAG)
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if (HAS_CPP14_FLAG)
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target_compile_options(${target_name} PUBLIC "-std=c++14")
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elseif (HAS_CPP11_FLAG)
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target_compile_options(${target_name} PUBLIC "-std=c++11")
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else()
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message(FATAL_ERROR "Unsupported compiler -- pybind11 requires C++11 support!")
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endif()
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string(TOUPPER "${CMAKE_BUILD_TYPE}" U_CMAKE_BUILD_TYPE)
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if (NOT ${U_CMAKE_BUILD_TYPE} MATCHES DEBUG)
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# Default symbol visibility
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target_compile_options(${target_name} PRIVATE "-fvisibility=hidden")
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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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@ -123,24 +158,22 @@ set(PYBIND11_EXAMPLES
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example/issues.cpp
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)
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# Check if Eigen is available
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find_package(Eigen3 QUIET)
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if (EIGEN3_FOUND)
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include_directories(${EIGEN3_INCLUDE_DIR})
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list(APPEND PYBIND11_EXAMPLES example/eigen.cpp)
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add_definitions(-DPYBIND11_TEST_EIGEN)
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message(STATUS "Building Eigen testcase")
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else()
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message(STATUS "NOT Building Eigen testcase")
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endif()
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# Create the binding library
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add_library(example SHARED
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${PYBIND11_HEADERS}
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example/example.cpp
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${PYBIND11_EXAMPLES}
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)
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# Don't add a 'lib' prefix to the shared library
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set_target_properties(example PROPERTIES PREFIX "")
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pybind11_add_module(example example/example.cpp ${PYBIND11_EXAMPLES})
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if (EIGEN3_FOUND)
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target_include_directories(example PRIVATE ${EIGEN3_INCLUDE_DIR})
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target_compile_definitions(example PRIVATE -DPYBIND11_TEST_EIGEN)
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endif()
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# Always write the output file directly into the 'example' directory (even on MSVC)
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set(CompilerFlags
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@ -169,30 +202,7 @@ if (WIN32)
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set_property(TARGET example APPEND_STRING PROPERTY LINK_FLAGS_MINSIZEREL "/LTCG ")
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set_property(TARGET example APPEND_STRING PROPERTY LINK_FLAGS_RELWITHDEBINFO "/LTCG ")
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endif()
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# .PYD file extension on Windows
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set_target_properties(example PROPERTIES SUFFIX ".pyd")
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# Link against the Python shared library
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target_link_libraries(example ${PYTHON_LIBRARIES})
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elseif (UNIX)
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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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# .SO file extension on Linux/Mac OS
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set_target_properties(example PROPERTIES SUFFIX ".so")
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# Optimize for a small binary size
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if (NOT ${U_CMAKE_BUILD_TYPE} MATCHES DEBUG)
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set_target_properties(example PROPERTIES COMPILE_FLAGS "-Os")
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@ -200,14 +210,12 @@ elseif (UNIX)
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# Strip unnecessary sections of the binary on Linux/Mac OS
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if(APPLE)
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set_target_properties(example PROPERTIES MACOSX_RPATH ".")
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set_target_properties(example PROPERTIES LINK_FLAGS "-undefined dynamic_lookup ")
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if (NOT ${U_CMAKE_BUILD_TYPE} MATCHES DEBUG)
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add_custom_command(TARGET example POST_BUILD COMMAND strip -u -r ${PROJECT_SOURCE_DIR}/example/example.so)
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add_custom_command(TARGET example POST_BUILD COMMAND strip -u -r $<TARGET_FILE:example>)
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endif()
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else()
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if (NOT ${U_CMAKE_BUILD_TYPE} MATCHES DEBUG)
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add_custom_command(TARGET example POST_BUILD COMMAND strip ${PROJECT_SOURCE_DIR}/example/example.so)
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add_custom_command(TARGET example POST_BUILD COMMAND strip $<TARGET_FILE:example>)
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endif()
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endif()
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endif()
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