1# Macros and functions related to detecting details of the Python environment. 2 3# Detects a pybind11 package installed in the current python environment 4# and sets variables to allow it to be found. This allows pybind11 to be 5# installed via pip, which typically yields a much more recent version than 6# the OS install, which will be available otherwise. 7function(mlir_detect_pybind11_install) 8 if(pybind11_DIR) 9 message(STATUS "Using explicit pybind11 cmake directory: ${pybind11_DIR} (-Dpybind11_DIR to change)") 10 else() 11 message(STATUS "Checking for pybind11 in python path...") 12 execute_process( 13 COMMAND "${Python3_EXECUTABLE}" 14 -c "import pybind11;print(pybind11.get_cmake_dir(), end='')" 15 WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} 16 RESULT_VARIABLE STATUS 17 OUTPUT_VARIABLE PACKAGE_DIR 18 ERROR_QUIET) 19 if(NOT STATUS EQUAL "0") 20 message(STATUS "not found (install via 'pip install pybind11' or set pybind11_DIR)") 21 return() 22 endif() 23 message(STATUS "found (${PACKAGE_DIR})") 24 set(pybind11_DIR "${PACKAGE_DIR}" PARENT_SCOPE) 25 endif() 26endfunction() 27