Look for Python3 again in SearchInstalledSoftware.cmake
This commit essentially reverts a288ff9 from four years ago, which was also part of the multi-python machinery that is not necessary anymore after Python 2 support was dropped. Also, make the choice of looked-up components consistent with what is actually required.
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@ -113,11 +113,7 @@ if( CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR )
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message(FATAL_ERROR
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"Unable to find Python interpreter, required for builds and testing.
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Please install Python or specify the PYTHON_EXECUTABLE CMake variable.")
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endif()
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if( ${PYTHON_VERSION_STRING} VERSION_LESS 2.7 )
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message(FATAL_ERROR "Python 2.7 or newer is required")
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Please install Python or specify the Python3_EXECUTABLE CMake variable.")
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endif()
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# Check prebuilt llvm/utils.
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