[CMake] [ExternalProject] UPDATE_DISCONNECTED

[Luc J. Bourhis]

The documentation says:

If UPDATE_DISCONNECTED is set, the update step is not executed
automatically when building the main target. The update step can still
be added as a step target and called manually. 

This option sounds interesting but I do not understand how this is supposed
to be used. What is the difference with 

in practice?




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Luc J. Bourhis

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