Re: SDK feedback

[Henning Schild <henning.schild@siemens.com>]

Am Wed, 12 Sep 2018 12:15:40 +0200
schrieb Jan Kiszka <jan.kiszka@siemens.com>:

> On 12.09.18 09:42, Maxim Yu. Osipov wrote:
> > Hi Jan,
> > 
> > On 09/11/2018 08:57 PM, Jan Kiszka wrote:  
> >> On 11.09.18 19:55, Jan Kiszka wrote:  
> >>> Hi Maksim,
> >>>
> >>> finally, I actually used the SDK on an ARM target, and it worked
> >>> nicely! One question and one feature request, though:
> >>>
> >>> I did not do the chroot dance and rather looked for a way to use
> >>> the cross compiler directly. And it /seems/ to work, at least for
> >>> the trivial case:
> >>>
> >>> export LD_LIBRARY_PATH=/path-to-sdk/usr/lib/x86_64-linux-gnu/
> >>> sdk/usr/bin/arm-linux-gnueabihf-gcc --sysroot /path-to-sdk \
> >>>      -o hello hello.c
> >>>
> >>> Does this make sense, at least for the classic "I need a
> >>> crosscompiler and the corresponding target libs" case? When will
> >>> it start to break?  
> > 
> > Honestly I always played with chroot and never tried
> > LD_LIBRARY_PATH approach in more complicated case, so I can't say
> > which problems may pop up.  
> 
> Henning, maybe once worth a try on some of the recent examples we now
> have (just for testing, they are normally built as part of a custom
> Isar layer).

People that use that layer found their own solution. They just take the
buildchroot as a sysroot for the cross-compiler of their distro. No
need to have a debian cross compiler or chroot. That has its
limitations, but is also really simple and seems to work well
enough ... so far.

Henning

> >> Forgot to state: my host was a SUSE 42.2.  
> > 
> > Nice to hear that it works under SUSE too
> > (I only tried sdk on Fedora box).

If you chrooted, you used Debian ;).

Henning

> >>  
> >>>
> >>>
> >>> And then I noticed that the deployed SDK image could be a bit
> >>> slimmer, specifically by purging /var/cache/apt prior to
> >>> packaging. Too lazy now to write my own patch. :)  
> > 
> > Got it ;) (I will prepare the patch).  
> 
> TIA!
> 
> BTW, if that direct call model works, we may shrink the SDK archive
> for that purpose even further (as there is no need to have a complete
> chroot anymore).
> 
> Jan
>