https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=240343
--- Comment #7 from Ting-Wei Lan <lant...@gmail.com> ---
(In reply to Kubilay Kocak from comment #6)
plasma5-breeze-gtk does nothing special here. It just uses
find_package(Python3) provided by CMake upstream with two lines of code.
find_package(Python3 COMPONENTS Interpreter REQUIRED)
set(PYTHON_EXECUTABLE "${Python3_EXECUTABLE}")
The find stratagy is provided by CMake upstream. It can be found in
/usr/local/share/cmake/Modules/FindPython/Support.cmake, and it is documented
at https://cmake.org/cmake/help/v3.15/module/FindPython3.html. After adding
message() calls to debug the module, I think the reason that setting
Python3_EXECUTABLE doesn't work for Python3_FIND_STRATEGY=VERSION is that it
always iterates through the list of known python versions, which starts at 3.8.
Since ${PYTHON_CMD} (3.6) specified with Python3_EXECUTABLE doesn't match the
requirement (3.8) exactly, _python_validate_interpreter resets
Python3_EXECUTABLE to Python3_EXECUTABLE-NOTFOUND. Therefore, all find_program
calls after the first _python_validate_interpreter don't see Python3_EXECUTABLE
set on the command line, and they just use its own way to find python.
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