Ive been struggling several nights now with getting by raspi camera driver working with gain settings. It works if I don't add the properties for gain, but when I add it, i get SIGSEGV inside a strncpy. Has anyone seen something like this. Ive debugged down to assembler code and its just one write to memory that is otherwise fine.
This happends when I add this line:

IUFillNumber(&mGainN[0], "GAIN", "Gain", "%.f", 1, 16.0, 1, 1);

Ive run it with electric fence memory checking and it is quite clear it is in the strncpy of the field name that is failing...

Any ideas? My hair is getting thinner and thinner.

Regards, Lars

Ok, I think I have found it. Forgetting an external declaration of your drivers std::unique_ptr<YourDriverClass> global pointer can have really weird effects. I don't know why, but any member outside the INDI::CCD part of your class was write-protected.