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gtsam/cmake/PybindWrap.cmake

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CMake
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if(GTWRAP_PYTHON_PACKAGE_DIR)
# packaged
set(GTWRAP_PACKAGE_DIR "${GTWRAP_PYTHON_PACKAGE_DIR}")
else()
set(GTWRAP_PACKAGE_DIR ${CMAKE_CURRENT_LIST_DIR}/..)
endif()
# Get the Python version
include(GtwrapUtils)
message(STATUS "Checking Python Version")
gtwrap_get_python_version(${WRAP_PYTHON_VERSION})
message(STATUS "Setting Python version for wrapper")
set(PYBIND11_PYTHON_VERSION ${WRAP_PYTHON_VERSION})
# User-friendly Pybind11 wrapping and installing function.
# Builds a Pybind11 module from the provided interface_header.
# For example, for the interface header gtsam.h, this will
# build the wrap module 'gtsam_py.cc'.
#
# Arguments:
# ~~~
# target: The Make target
# interface_header: The relative path to the wrapper interface definition file.
# generated_cpp: The name of the cpp file which is generated from the tpl file.
# module_name: The name of the Python module to use.
# top_namespace: The C++ namespace under which the code to be wrapped exists.
# ignore_classes: CMake list of classes to ignore from wrapping.
# install_path: Destination to install the library.
# module_template: The template file (.tpl) from which to generate the Pybind11 module.
# libs: Libraries to link with.
# dependencies: Dependencies which need to be built before the wrapper.
# use_boost (optional): Flag indicating whether to include Boost.
function(pybind_wrap
target
interface_header
generated_cpp
module_name
top_namespace
ignore_classes
module_template
libs
dependencies)
set(ExtraMacroArgs ${ARGN})
list(GET ExtraMacroArgs 0 USE_BOOST)
if(USE_BOOST)
set(_WRAP_BOOST_ARG "--use-boost")
else(USE_BOOST)
set(_WRAP_BOOST_ARG "")
endif(USE_BOOST)
if (UNIX)
set(GTWRAP_PATH_SEPARATOR ":")
else()
set(GTWRAP_PATH_SEPARATOR ";")
endif()
add_custom_command(OUTPUT ${generated_cpp}
COMMAND ${CMAKE_COMMAND} -E env "PYTHONPATH=${GTWRAP_PACKAGE_DIR}${GTWRAP_PATH_SEPARATOR}$ENV{PYTHONPATH}"
${PYTHON_EXECUTABLE}
${PYBIND_WRAP_SCRIPT}
--src
${interface_header}
--out
${generated_cpp}
--module_name
${module_name}
--top_module_namespaces
"${top_namespace}"
--ignore
${ignore_classes}
--template
${module_template}
${_WRAP_BOOST_ARG}
VERBATIM)
add_custom_target(pybind_wrap_${module_name} ALL DEPENDS ${generated_cpp})
# Late dependency injection, to make sure this gets called whenever the
# interface header or the wrap library are updated.
# ~~~
# See: https://stackoverflow.com/questions/40032593/cmake-does-not-rebuild-dependent-after-prerequisite-changes
# ~~~
add_custom_command(OUTPUT ${generated_cpp}
DEPENDS ${interface_header}
# @GTWRAP_SOURCE_DIR@/gtwrap/interface_parser.py
# @GTWRAP_SOURCE_DIR@/gtwrap/pybind_wrapper.py
# @GTWRAP_SOURCE_DIR@/gtwrap/template_instantiator.py
APPEND)
pybind11_add_module(${target} ${generated_cpp})
if(APPLE)
# `type_info` objects will become "weak private external" if the templated class is initialized implicitly even if we explicitly
# export them with `WRAP_EXPORT`. If that happens, the `type_info` for the same templated class will diverge between shared
# libraries, causing `dynamic_cast` to fail. This is mitigated by telling Clang to mimic the MSVC behavior.
# See https://developer.apple.com/library/archive/technotes/tn2185/_index.html#//apple_ref/doc/uid/DTS10004200-CH1-SUBSECTION2
# https://github.com/CppMicroServices/CppMicroServices/pull/82/files
# https://www.russellmcc.com/posts/2013-08-03-rtti.html
target_compile_options(${target} PRIVATE "-fvisibility-ms-compat")
endif()
add_dependencies(${target} pybind_wrap_${module_name})
if(NOT "${libs}" STREQUAL "")
target_link_libraries(${target} PRIVATE "${libs}")
endif()
if(NOT "${dependencies}" STREQUAL "")
add_dependencies(${target} ${dependencies})
endif()
endfunction()
# Helper function to install python scripts and handle multiple build types
# where the scripts should be installed to all build type toolboxes
#
# Arguments:
# ~~~
# source_directory: The source directory to be installed. "The last component
# of each directory name is appended to the destination directory but a
# trailing slash may be used to avoid this because it leaves the last
# component empty."
# (https://cmake.org/cmake/help/v3.3/command/install.html?highlight=install#installing-directories)
# dest_directory: The destination directory to install to.
# patterns: list of file patterns to install
# ~~~
function(install_python_scripts
source_directory
dest_directory
patterns)
set(patterns_args "")
set(exclude_patterns "")
foreach(pattern ${patterns})
list(APPEND patterns_args PATTERN "${pattern}")
endforeach()
if(WRAP_BUILD_TYPE_POSTFIXES)
foreach(build_type ${CMAKE_CONFIGURATION_TYPES})
string(TOUPPER "${build_type}" build_type_upper)
if(${build_type_upper} STREQUAL "RELEASE")
set(build_type_tag "") # Don't create release mode tag on installed
# directory
else()
set(build_type_tag "")
endif()
# Split up filename to strip trailing '/' in GTSAM_PY_INSTALL_PATH if
# there is one
get_filename_component(location "${dest_directory}" PATH)
get_filename_component(name "${dest_directory}" NAME)
install(DIRECTORY "${source_directory}"
DESTINATION "${location}/${name}${build_type_tag}"
CONFIGURATIONS "${build_type}"
FILES_MATCHING ${patterns_args}
PATTERN "${exclude_patterns}" EXCLUDE)
endforeach()
else()
install(DIRECTORY "${source_directory}"
DESTINATION "${dest_directory}"
FILES_MATCHING ${patterns_args}
PATTERN "${exclude_patterns}" EXCLUDE)
endif()
endfunction()
# Helper function to install specific files and handle multiple build types
# where the scripts should be installed to all build type toolboxes
#
# Arguments:
# ~~~
# source_files: The source files to be installed.
# dest_directory: The destination directory to install to.
function(install_python_files source_files dest_directory)
if(WRAP_BUILD_TYPE_POSTFIXES)
foreach(build_type ${CMAKE_CONFIGURATION_TYPES})
string(TOUPPER "${build_type}" build_type_upper)
set(build_type_tag "")
# Split up filename to strip trailing '/' in WRAP_PY_INSTALL_PATH if
# there is one
get_filename_component(location "${dest_directory}" PATH)
get_filename_component(name "${dest_directory}" NAME)
install(FILES "${source_files}"
DESTINATION "${location}/${name}${build_type_tag}"
CONFIGURATIONS "${build_type}")
endforeach()
else()
install(FILES "${source_files}" DESTINATION "${dest_directory}")
endif()
endfunction()
# ~~~
# https://stackoverflow.com/questions/13959434/cmake-out-of-source-build-python-files
# ~~~
function(create_symlinks source_folder dest_folder)
if(${source_folder} STREQUAL ${dest_folder})
return()
endif()
file(GLOB files
LIST_DIRECTORIES true
RELATIVE "${source_folder}"
"${source_folder}/*")
foreach(path_file ${files})
get_filename_component(folder ${path_file} PATH)
get_filename_component(ext ${path_file} EXT)
set(ignored_ext ".tpl" ".h")
list (FIND ignored_ext "${ext}" _index)
if (${_index} GREATER -1)
continue()
endif ()
# Create REAL folder
file(MAKE_DIRECTORY "${dest_folder}")
# Delete symlink if it exists
file(REMOVE "${dest_folder}/${path_file}")
# Get OS dependent path to use in `execute_process`
file(TO_NATIVE_PATH "${dest_folder}/${path_file}" link)
file(TO_NATIVE_PATH "${source_folder}/${path_file}" target)
# cmake-format: off
if(UNIX)
set(command ln -s ${target} ${link})
else()
set(command cmd.exe /c mklink ${link} ${target})
endif()
# cmake-format: on
execute_process(COMMAND ${command}
RESULT_VARIABLE result
ERROR_VARIABLE output)
if(NOT ${result} EQUAL 0)
message(
FATAL_ERROR
"Could not create symbolic link for: ${target} --> ${output}")
endif()
endforeach(path_file)
endfunction(create_symlinks)
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