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fix: allow cmake varibles from Python calls to be cached (#2570)

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Henry Schreiner 2020-10-09 17:33:45 -04:00 committed by GitHub
parent fecef38864
commit d46f3322a4
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1 changed files with 27 additions and 19 deletions
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46
tools/pybind11NewTools.cmake
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@ -80,31 +80,39 @@ if(NOT DEFINED ${_Python}_EXECUTABLE)
endif()
# Debug check - see https://stackoverflow.com/questions/646518/python-how-to-detect-debug-Interpreter
execute_process(
COMMAND "${${_Python}_EXECUTABLE}" "-c" "import sys; sys.exit(hasattr(sys, 'gettotalrefcount'))"
RESULT_VARIABLE PYTHON_IS_DEBUG)
if(NOT DEFINED PYTHON_IS_DEBUG)
# Debug check - see https://stackoverflow.com/questions/646518/python-how-to-detect-debug-Interpreter
execute_process(
COMMAND "${${_Python}_EXECUTABLE}" "-c"
"import sys; sys.exit(hasattr(sys, 'gettotalrefcount'))"
RESULT_VARIABLE _PYTHON_IS_DEBUG)
set(PYTHON_IS_DEBUG
"${_PYTHON_IS_DEBUG}"
CACHE INTERNAL "Python debug status")
endif()
# Get the suffix - SO is deprecated, should use EXT_SUFFIX, but this is
# required for PyPy3 (as of 7.3.1)
execute_process(
COMMAND "${${_Python}_EXECUTABLE}" "-c"
"from distutils import sysconfig; print(sysconfig.get_config_var('SO'))"
OUTPUT_VARIABLE _PYTHON_MODULE_EXTENSION
ERROR_VARIABLE _PYTHON_MODULE_EXTENSION_ERR
OUTPUT_STRIP_TRAILING_WHITESPACE)
if(NOT DEFINED PYTHON_MODULE_EXTENSION)
execute_process(
COMMAND "${${_Python}_EXECUTABLE}" "-c"
"from distutils import sysconfig; print(sysconfig.get_config_var('SO'))"
OUTPUT_VARIABLE _PYTHON_MODULE_EXTENSION
ERROR_VARIABLE _PYTHON_MODULE_EXTENSION_ERR
OUTPUT_STRIP_TRAILING_WHITESPACE)
if(_PYTHON_MODULE_EXTENSION STREQUAL "")
message(
FATAL_ERROR "pybind11 could not query the module file extension, likely the 'distutils'"
"package is not installed. Full error message:\n${_PYTHON_MODULE_EXTENSION_ERR}")
if(_PYTHON_MODULE_EXTENSION STREQUAL "")
message(
FATAL_ERROR "pybind11 could not query the module file extension, likely the 'distutils'"
"package is not installed. Full error message:\n${_PYTHON_MODULE_EXTENSION_ERR}")
endif()
# This needs to be available for the pybind11_extension function
set(PYTHON_MODULE_EXTENSION
"${_PYTHON_MODULE_EXTENSION}"
CACHE INTERNAL "")
endif()
# This needs to be available for the pybind11_extension function
set(PYTHON_MODULE_EXTENSION
"${_PYTHON_MODULE_EXTENSION}"
CACHE INTERNAL "")
# Python debug libraries expose slightly different objects before 3.8
# 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