Adjust Tcl-related code to compile cleanly with Tcl 8.4 (add const modifiers as needed).  Some desultory const-ification of SPI interface to support this. (from -core)
Adjust Tcl-related code to compile cleanly with Tcl 8.4 (add const modifiers as
needed).  Some desultory const-ification of SPI interface to support this. (from -core)

flightaware/Pgtcl,flightaware/Pgtcl