knx/examples/knxPython/pybind11/tools/pybind11GuessPythonExtSuffix.cmake
2024-06-29 16:50:08 +02:00

87 lines
3.2 KiB
CMake

cmake_minimum_required(VERSION 3.5)
function(pybind11_guess_python_module_extension python)
# The SETUPTOOLS_EXT_SUFFIX environment variable takes precedence:
if(NOT DEFINED PYTHON_MODULE_EXT_SUFFIX AND DEFINED ENV{SETUPTOOLS_EXT_SUFFIX})
message(
STATUS
"Getting Python extension suffix from ENV{SETUPTOOLS_EXT_SUFFIX}: $ENV{SETUPTOOLS_EXT_SUFFIX}"
)
set(PYTHON_MODULE_EXT_SUFFIX
"$ENV{SETUPTOOLS_EXT_SUFFIX}"
CACHE
STRING
"Extension suffix for Python extension modules (Initialized from SETUPTOOLS_EXT_SUFFIX)")
endif()
# If that didn't work, use the Python_SOABI variable:
if(NOT DEFINED PYTHON_MODULE_EXT_SUFFIX AND DEFINED ${python}_SOABI)
message(
STATUS "Determining Python extension suffix based on ${python}_SOABI: ${${python}_SOABI}")
# The final extension depends on the system
set(_PY_BUILD_EXTENSION "${CMAKE_SHARED_MODULE_SUFFIX}")
if(CMAKE_SYSTEM_NAME STREQUAL "Windows")
set(_PY_BUILD_EXTENSION ".pyd")
endif()
# If the SOABI already has an extension, use it as the full suffix
# (used for debug versions of Python on Windows)
if(${python}_SOABI MATCHES "\\.")
set(PYTHON_MODULE_EXT_SUFFIX "${${python}_SOABI}")
# If the SOABI is empty, this is usually a bug, but we generate a
# correct extension anyway, which is the best we can do
elseif("${${python}_SOABI}" STREQUAL "")
message(
WARNING
"${python}_SOABI is defined but empty. You may want to set PYTHON_MODULE_EXT_SUFFIX explicitly."
)
set(PYTHON_MODULE_EXT_SUFFIX "${_PY_BUILD_EXTENSION}")
# Otherwise, add the system-dependent extension to it
else()
set(PYTHON_MODULE_EXT_SUFFIX ".${${python}_SOABI}${_PY_BUILD_EXTENSION}")
endif()
endif()
# If we could not deduce the extension suffix, unset the results:
if(NOT DEFINED PYTHON_MODULE_EXT_SUFFIX)
unset(PYTHON_MODULE_DEBUG_POSTFIX PARENT_SCOPE)
unset(PYTHON_MODULE_EXTENSION PARENT_SCOPE)
unset(PYTHON_IS_DEBUG PARENT_SCOPE)
return()
endif()
# Sanity checks:
if(${python}_SOABI AND NOT (PYTHON_MODULE_EXT_SUFFIX STREQUAL ${python}_SOABI
OR PYTHON_MODULE_EXT_SUFFIX MATCHES "\\.${${python}_SOABI}\\."))
message(
WARNING
"Python extension suffix (${PYTHON_MODULE_EXT_SUFFIX}) does not match ${python}_SOABI (${${python}_SOABI})."
)
endif()
# Separate file name postfix from extension: (https://github.com/pybind/pybind11/issues/4699)
get_filename_component(_PYTHON_MODULE_DEBUG_POSTFIX "${PYTHON_MODULE_EXT_SUFFIX}" NAME_WE)
get_filename_component(_PYTHON_MODULE_EXTENSION "${PYTHON_MODULE_EXT_SUFFIX}" EXT)
# Try to deduce the debug ABI from the extension suffix:
if(NOT DEFINED _PYTHON_IS_DEBUG)
if(_PYTHON_MODULE_EXTENSION MATCHES "^\\.(cpython-|cp|pypy)[0-9]+dm?-"
OR _PYTHON_MODULE_DEBUG_POSTFIX MATCHES "^_d")
set(_PYTHON_IS_DEBUG On)
else()
set(_PYTHON_IS_DEBUG Off)
endif()
endif()
# Return results
set(PYTHON_MODULE_DEBUG_POSTFIX
"${_PYTHON_MODULE_DEBUG_POSTFIX}"
PARENT_SCOPE)
set(PYTHON_MODULE_EXTENSION
"${_PYTHON_MODULE_EXTENSION}"
PARENT_SCOPE)
set(PYTHON_IS_DEBUG
"${_PYTHON_IS_DEBUG}"
PARENT_SCOPE)
endfunction()