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67 lines
2.3 KiB
67 lines
2.3 KiB
3 years ago
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cmake_minimum_required(VERSION 3.19...3.20)
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project(UnversionedNames LANGUAGES NONE)
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# check if it is possible to find python with a generic name
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find_program(UNVERSIONED_Python3 NAMES python3)
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if (NOT UNVERSIONED_Python3)
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# no generic name available
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# test cannot be done
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return()
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endif()
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# search with default configuration
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find_package(Python3 REQUIRED COMPONENTS Interpreter)
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if (Python3_EXECUTABLE STREQUAL UNVERSIONED_Python3)
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# default configuration pick-up the generic name
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# test cannot be completed
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return()
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endif()
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unset(Python3_EXECUTABLE)
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# Force now to search first for generic name
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set(Python3_FIND_UNVERSIONED_NAMES FIRST)
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find_package(Python3 REQUIRED COMPONENTS Interpreter)
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if (NOT Python3_EXECUTABLE STREQUAL UNVERSIONED_Python3)
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message(SEND_ERROR "Found unexpected interpreter ${Python3_EXECUTABLE} instead of ${UNVERSIONED_Python3}")
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endif()
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# To check value 'NEVER", creates directory holding a symlink to the generic name
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file(REMOVE_RECURSE "${CMAKE_CURRENT_BINARY_DIR}/bin")
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file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/bin")
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file(CREATE_LINK "${UNVERSIONED_Python3}" "${CMAKE_CURRENT_BINARY_DIR}/bin/python3" SYMBOLIC)
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unset(Python3_EXECUTABLE)
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set(Python3_FIND_UNVERSIONED_NAMES FIRST)
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set(Python3_ROOT_DIR "${CMAKE_CURRENT_BINARY_DIR}")
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# First search: generic name must be found
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find_package(Python3 REQUIRED COMPONENTS Interpreter)
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if (NOT Python3_EXECUTABLE STREQUAL "${CMAKE_CURRENT_BINARY_DIR}/bin/python3")
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message(FATAL_ERROR "Found unexpected interpreter ${Python3_EXECUTABLE} instead of ${CMAKE_CURRENT_BINARY_DIR}/bin/python3")
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endif()
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unset(Python3_EXECUTABLE)
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set(Python3_FIND_UNVERSIONED_NAMES LAST)
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# Second search: generic name must be found
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find_package(Python3 REQUIRED COMPONENTS Interpreter)
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if (NOT Python3_EXECUTABLE STREQUAL "${CMAKE_CURRENT_BINARY_DIR}/bin/python3")
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message(FATAL_ERROR "Found unexpected interpreter ${Python3_EXECUTABLE} instead of ${CMAKE_CURRENT_BINARY_DIR}/bin/python3")
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endif()
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unset(Python3_EXECUTABLE)
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set(Python3_FIND_UNVERSIONED_NAMES NEVER)
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# Third search: generic name must NOT be found
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find_package(Python3 REQUIRED COMPONENTS Interpreter)
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if (Python3_EXECUTABLE STREQUAL "${CMAKE_CURRENT_BINARY_DIR}/bin/python3")
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message(FATAL_ERROR "Found unexpected interpreter ${Python3_EXECUTABLE}")
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endif()
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