Enhance the base/rom extension to generate the symbol file of the rom built.
The symbol file is placed in epoc32/rom/<baseport_name>, along with the rom log and final oby file.
# component name "User Side Hardware Abstraction"
component base_hal
source \sf\os\kernelhwsrv\halservices\hal
binary \sf\os\kernelhwsrv\halservices\hal all
exports \sf\os\kernelhwsrv\halservices\hal
notes_source \component_defs\release.src
ipr D
ipr T \sf\os\kernelhwsrv\halservices\hal\tsrc