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Fix Python3 detection #160

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Fix Python3 detection #160

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e53e9a1
Fix Python3 detection.
Oct 2, 2023
d4c0afa
Update CMakeLists.txt
steleman Oct 31, 2023
c54c674
Update Python detection for CMake 2.27
steleman Oct 31, 2023
b7b012d
Testing Python discovery
steleman Oct 31, 2023
c746929
Update CMakeLists.txt
steleman Oct 31, 2023
f2a372a
Update CMakeLists.txt
steleman Oct 31, 2023
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61 changes: 60 additions & 1 deletion CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -45,8 +45,67 @@ endif()

enable_language(C CXX ASM)

execute_process(COMMAND cmake --version OUTPUT_VARIABLE TEST_CMAKE_VERSION)
message(STATUS "Using CMake Version: ${TEST_CMAKE_VERSION}")

# Find a suitable version of Python3 higher than 3.8.
set(PYTHON_VERSIONS 3.9;3.10;3.11;3.12;3.13)
set(GOOD_PYTHON_FOUND FALSE)

message(STATUS: "Python Before Loop:")
message(STATUS: "Python3_FOUND: ${Python3_FOUND}")
message(STATUS: "Python3_Interpreter_FOUND: ${Python3_Interpreter_FOUND}")

foreach(X IN LISTS PYTHON_VERSIONS)
message(STATUS "Searching for Python Version ${X} ...")

set(Python3_REQUIRED_VERSION ${X} EXACT)
find_package(Python3 ${X} EXACT QUIET COMPONENTS Interpreter OPTIONAL_COMPONENTS Development)

if (NOT ${Python3_FOUND})
message(STATUS "PYTHON VERSION ${X} NOT FOUND.")
set(GOOD_PYTHON_FOUND FALSE)
continue()
endif()

if (NOT ${Python3_Interpreter_FOUND})
message(STATUS "PYTHON INTERPRETER VERSION ${X} NOT FOUND.")
set(GOOD_PYTHON_FOUND FALSE)
continue()
else()
set(GOOD_PYTHON_FOUND TRUE)
endif()

if (${Python3_VERSION_MINOR} LESS "9")
message(STATUS "Minor Version ${Python3_VERSION_MINOR} not a candidate.")
set(GOOD_PYTHON_FOUND FALSE)
continue()
else()
if (NOT ${Python3_Interpreter_FOUND})
message(STATUS "Could not find a Python Interpreter for Version ${X}")
set(GOOD_PYTHON_FOUND FALSE)
continue()
else()
set(GOOD_PYTHON_FOUND TRUE)
endif()
endif()

if (${Python3_FOUND} AND ${Python3_Interpreter_FOUND})
message(STATUS "Found Python Version ${Python3_VERSION}.")
set(GOOD_PYTHON_FOUND TRUE)
break()
endif()
endforeach()

if (NOT ${GOOD_PYTHON_FOUND})
message(FATAL_ERROR "Could not find a suitable version of Python.")
endif()

message(STATUS: "Python After Loop:")
message(STATUS: "Python3_FOUND: ${Python3_FOUND}")
message(STATUS: "Python3_Interpreter_FOUND: ${Python3_Interpreter_FOUND}")

# Find external packages
find_package(Python COMPONENTS Interpreter Development)
find_package(qasm REQUIRED)
find_package(mpc REQUIRED)
find_package(mpfr REQUIRED)
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