221
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1 # Macros and functions related to detecting details of the Python environment.
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2
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3 # Detects a pybind11 package installed in the current python environment
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4 # and sets variables to allow it to be found. This allows pybind11 to be
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5 # installed via pip, which typically yields a much more recent version than
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6 # the OS install, which will be available otherwise.
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7 function(mlir_detect_pybind11_install)
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8 if(pybind11_DIR)
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9 message(STATUS "Using explicit pybind11 cmake directory: ${pybind11_DIR} (-Dpybind11_DIR to change)")
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10 else()
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11 message(STATUS "Checking for pybind11 in python path...")
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12 execute_process(
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13 COMMAND "${Python3_EXECUTABLE}"
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14 -c "import pybind11;print(pybind11.get_cmake_dir(), end='')"
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15 WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
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16 RESULT_VARIABLE STATUS
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17 OUTPUT_VARIABLE PACKAGE_DIR
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18 ERROR_QUIET)
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19 if(NOT STATUS EQUAL "0")
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20 message(STATUS "not found (install via 'pip install pybind11' or set pybind11_DIR)")
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21 return()
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22 endif()
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23 message(STATUS "found (${PACKAGE_DIR})")
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24 set(pybind11_DIR "${PACKAGE_DIR}" PARENT_SCOPE)
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25 endif()
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26 endfunction()
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