torch-mlir/cmake/modules/NpcompDetectPythonEnv.cmake

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# Forked and adapted from MLIRDetectPythonEnv.cmake upstream. The eventual
# goal is to use the upstream configuration but until that is ready, just
# move/adapt these facilities. Please try to not diverge.
# Macros and functions related to detecting details of the Python environment.
# Detects a pybind11 package installed in the current python environment
# and sets variables to allow it to be found. This allows pybind11 to be
# installed via pip, which typically yields a much more recent version than
# the OS install, which will be available otherwise.
function(npcomp_detect_pybind11_install)
if(pybind11_DIR)
message(STATUS "Using explicit pybind11 cmake directory: ${pybind11_DIR} (-Dpybind11_DIR to change)")
else()
message(CHECK_START "Checking for pybind11 in python path...")
execute_process(
COMMAND "${PYTHON_EXECUTABLE}"
-c "import pybind11;print(pybind11.get_cmake_dir(), end='')"
WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
RESULT_VARIABLE STATUS
OUTPUT_VARIABLE PACKAGE_DIR
ERROR_QUIET)
if(NOT STATUS EQUAL "0")
message(CHECK_FAIL "not found (install via 'pip install pybind11' or set pybind11_DIR)")
return()
endif()
message(CHECK_PASS "found (${PACKAGE_DIR})")
set(pybind11_DIR "${PACKAGE_DIR}" PARENT_SCOPE)
endif()
endfunction()