On 2015-09-22 08:41, Gianfranco Costamagna wrote: > Hi Niels, > > [...] >> As for the build-id and how it is computed. It is based on the >> internals of the ELF binary including but not limited to: >> >> * The path where the binaries were compiled >> * The options given to gcc when compiled >> * Time and day, if such are included in the code (__DATE__ macros >> and such). > > > So how did it work for Thomas with the previous version installed? > > /me is confused :) > > cheers, > > G. >
If the old and the new binary have the same build-id, they can reuse the same debug symbols - regardless of the debug symbols are installed by name or by build id. :) So if Thomas can use the old foo with the new foo-dbg, then I guess: * foo-dbg is missing the strict mandatory dependency (or Thomas passed force options to dpkg), and * Thomas built it in the same path as the previous location with the same options, and * upstream does not use any time based macros? On the plus side, this would imply that the ELF binaries are build reproducibly. :) Thanks, ~Niels
