Hi, On Thu, Sep 23, 2021 at 01:02:20PM +0000, Henzer, Kevin wrote: > Thanks for adding me to the mailing list, and thank for this nice tool that > PTXdist is ! > > I'm new to PTXdist, and I have inherited a build setup that creates two > different but quite similar system images, following two different global > configurations (config_1 and config_2). > One is the rescue update image of the system, the other the full-featured > image. It is using a script to build them both in a row. > > Before a recent update, calling the build process successively on those two > configurations gave a big speed-up for the second build. The system was > reusing most of the packages. > > ./ptxdist go --ptxconfig=configs/config_1 > --platformconfig=configs/platformconfig # takes time only the first time, > else quite fast > ./ptxdist images --ptxconfig=configs/ config_1 > --platformconfig=configs/platformconfig # quite fast > > ./ptxdist go --ptxconfig=configs/config_2 > --platformconfig=configs/platformconfig # quite fast > ./ptxdist images --ptxconfig=configs/ config_2 > --platformconfig=configs/platformconfig # quite fast > > > > But after updating PTXdist to newer version (now using PTXdist version > 2021.03.0), and updating the config files, it seems something has changed, > and the outcome is different. > > ./ptxdist go --ptxconfig=configs/config_1 > --platformconfig=configs/platformconfig # takes time at each build > ./ptxdist images --ptxconfig=configs/ config_1 > --platformconfig=configs/platformconfig # quite fast > > ./ptxdist go --ptxconfig=configs/config_2 > --platformconfig=configs/platformconfig # takes time at each build, seems > the system is rebuilding everything > > > And I got this as first output when switching from one configuration to the > other: > > ----------------------------------------------------------------- > target: host-system-perl.[some hash].cfghash > ----------------------------------------------------------------- > > Configuration changed! Reconfiguring...
This is most likely the cause. Just about everything in the BSP depends (indirectly) on this. > I checked this package and seems to me it is just ensuring that Perl is > installed on the host and that the right features are available. > I checked all config options that I think are linked to this package (I > searched in rules/host-system-perl.make) : > > PTXCONF_HOST_SYSTEM_PERL_BUILD > PTXCONF_HOST_SYSTEM_PERL_JSON > PTXCONF_HOST_SYSTEM_PERL_LOCALE_PO > PTXCONF_HOST_SYSTEM_PERL_XMLPARSER > PTXCONF_HOST_SYSTEM_PERL_YAPP > > And they are set the same in both config files. > > > Still, the hash of this package is changing between each call with different > config. > > So, I was wondering: > - Can it be that the reconfiguration and "rebuild" of this package is > what triggers the full image rebuild? Yes, definitely. > - If yes, what could trigger this host-system-perl reconfiguration, in your > opinion ? I'm not sure. It look like it shouldn't change, so lets dig deeper. > And most important for me, how are those .cfghash computed ? If you have a > quick link to the relevant part of the doc, I'll be very happy ! So, there is no documentation and it changed a bit over time. PTXdist creates a file for this and calculates the md5. The file contains: - the content of host-system-perl.make and host-system-perl.in - all PTXCONF_HOST_SYSTEM_PERL* options While PTXdist is running, this file can be found at /tmp/ptxdist.XXXXXX/pkghash-HOST_SYSTEM_PERL (XXXXXX is some random string here). Compare the two versions to see what's different. Michael -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ ptxdist mailing list [email protected] To unsubscribe, send a mail with subject "unsubscribe" to [email protected]
