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by snnn 811 days ago
A cmake option only has two values: ON or OFF. There is no unset. Because it is a boolean.

See: https://cmake.org/cmake/help/latest/command/option.html
2 comments
account42 805 days ago
This is not actually true, you can check if variables have been defined in CMake.
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xorcist 811 days ago
Right, but the boolean is set by an autoconf script, is it not?
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