On Mon, 18 Apr 2016 13:50:15 Mark Hatle wrote: > On 4/18/16 9:16 AM, Andreas Müller wrote: > > On Mon, Apr 18, 2016 at 3:55 PM, Burton, Ross <[email protected]> wrote: > >> On 18 April 2016 at 14:08, Hongxu Jia <[email protected]> wrote: > >>> If sysroot is required, override DEBUG_FLAGS to remove > >>> -fdebug-prefix-map > >> > >> We should probably get this in the release notes, as many people do > >> indeed > >> want remote debug to work. > >> > >> Can you tell gdb the base path to use when looking for symbols? I've not > >> done remote GDB for some time but wouldn't "set substitute-path / > >> //my/sysroot/" work? Or maybe /usr /my/sysroot/usr? > >> > >> If gdb can't be told then instead of having to replace all of DEBUG_FLAGS > >> it would be neat if the prefix mapping variables where in another > >> variable that could just be unset. > >> > >> Ross > > > > OK I think I could live with removing -fdebug-prefix-map for now. > > > > A thought: We have the setting IMAGE_GEN_DEBUGFS - I have not yet > > tested. As far as I understand it creates an unstripped sysroot and > > does not affect target rootfs - is that correct? Does the sysroot > > created by IMAGE_GEN_DEBUGFS contain the sources? If yes we could set > > that as sysroot for gdb. > > > > I think one of the problems we have here is that there is no reference > > way documented (or it is outdated) how remote debugging is meant to be > > performed. > > Remote debugging is setup to always assume the remote side has access to a > debugable sysroot. This isn't the project's sysroot, since that is > transient, but a REAL matching sysroot to the main image. > > The easiest way to do this is to add the following to your local.conf: > IMAGE_GEN_DEBUGFS = '1' > > After this, look in your deploy directory and you will see the image to > deploy to the target, and also a matching 'debug' chunk that you keep on > your local host. This way you -know- they are always in sync. > > There is class material from the various Yocto Project Dev Day classes on > using this.
I thought I'd seen this go into the manual but I can't seem to find it; I also can't find said Dev Day class material online. Mark, would you be able to work with Scott R to get this documented both within the variable reference and in a task-oriented manner? In the mean time, Jefro - is the recent dev day material available somewhere? I can only find 2014 (ELCE Dusseldorf) under "Training" on the YP website. Thanks, Paul -- Paul Eggleton Intel Open Source Technology Centre -- _______________________________________________ Openembedded-core mailing list [email protected] http://lists.openembedded.org/mailman/listinfo/openembedded-core
