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fix: Add a nice CMake error when Interpreter component is missing. (#2519)

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Closes #2515, found by @rhjdjong
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Henry Schreiner 2020-09-21 18:34:48 -04:00 committed by GitHub
parent 5e6ec49652
commit e01f492462
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10
tools/pybind11NewTools.cmake
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@ -70,6 +70,16 @@ if(PYBIND11_MASTER_PROJECT)
endif()
endif()
# If a user finds Python, they may forget to include the Interpreter component
# and the following two steps require it. It is highly recommended by CMake
# when finding development libraries anyway, so we will require it.
if(NOT DEFINED ${_Python}_EXECUTABLE)
message(
FATAL_ERROR
"${_Python} was found without the Interpreter component. Pybind11 requires this component.")
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'))"