lasp/cmake/QueryPythonForPybind11.cmake

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2022-07-20 12:58:48 +00:00
# First tries to find Python 3, then tries to import the pybind11 module to
# query the CMake config location, and finally imports pybind11 using
# find_package(pybind11 REQUIRED CONFIG).
function(find_pybind11_python_first)
# Query Python to see if it knows where the headers are
find_package(Python3 REQUIRED COMPONENTS Interpreter Development)
if (NOT pybind11_ROOT OR NOT EXISTS ${pybind11_ROOT})
execute_process(COMMAND ${Python3_EXECUTABLE}
-m pybind11 --cmakedir
OUTPUT_VARIABLE PY_BUILD_PYBIND11_CMAKE
OUTPUT_STRIP_TRAILING_WHITESPACE
RESULT_VARIABLE PY_BUILD_CMAKE_PYBIND11_RESULT)
# If it was successful
if (PY_BUILD_CMAKE_PYBIND11_RESULT EQUAL 0)
message(STATUS "Found pybind11: ${PY_BUILD_PYBIND11_CMAKE}")
set(pybind11_ROOT ${PY_BUILD_PYBIND11_CMAKE}
CACHE PATH "Path to the pybind11 CMake configuration." FORCE)
else()
unset(pybind11_ROOT CACHE)
endif()
endif()
find_package(pybind11 REQUIRED CONFIG)
endfunction()