Support disabling Svc/GenericHub

[celskeggs]

Related Issue(s)	n/a
Has Unit Tests (y/n)	n
Documentation Included (y/n)	n
Generative AI was used in this contribution (y/n)	n

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Change Description

Add FPRIME_ENABLE_SERIAL_HUBS cmake option to disable compilation of Svc/GenericHub.

Rationale

This allows FW_PORT_SERIALIZATION to be set to 0.

Testing/Review Recommendations

N/A

Future Work

N/A

AI Usage (see policy)

Not used.

[LeStarch]

The concern here is that we are adding a flag specifically to disable hubs, where there is no guarantee that these hubs are the only serial types used in the system. Done this way, it would result in a lot of feature flags.

A possible other solution would be to mark the GenericHub EXCLUDE_FROM_ALL. This would prevent it from building unless it is in the dependency graph of the build. In this case it would be a legitimate error.

This is how we updated the sub-topologies that added restrict_platforms. See:

fprime/Svc/Subtopologies/CdhCore/CdhCoreConfig/CMakeLists.txt

Line 2 in 6915c93

EXCLUDE_FROM_ALL

.

[celskeggs]

EXCLUDE_FROM_ALL should work. I'll give it a try.

[LeStarch]

@celskeggs did this work? If so, I'd like to get this PR updated, or closed.

[LeStarch]

See #4178. This is the recommended fix. If this does not work, reopen this PR.

[celskeggs]

Thanks, looks good, sorry for the slowness on our end.