make abi3
feature apply to config imported from PYO3_BUILD_CONFIG
#4497
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This adjusts the
PYO3_CONFIG_FILE
system so that if theabi3
feature is set but the config file didn't set it, theabi3
feature wins.While a breaking change, people using
PYO3_CONFIG_FILE
directly are relatively rare. I also think that it's better for theabi3
feature to apply consistently rather than silently ignoring it.There's a case to be made that the
InterpreterConfig
doesn't need to have theabi3
field as that's a property of the binding mode and not the interpreter, but that's a possible refactor for another time.