error: 'GenericSignalHandler' was not declared in this scope

hi i had my code which was working and compiling fine in the QNX 6.2.0.

When i tried to use the QNX 6.5 and i tried to compile my source code it shows the below error.

“error: ‘GenericSignalHandler’ was not declared in this scope”

And also i checked that “signal.h” is present in the “usr/include/signal.h”

I dont recall this fonction every being part of QNX. If it was ever was in QNX it must have been internal, but thats very unlikely. Aside Photon I have not seen a fonction name starting with a Capital.