Re: [PATCH] crossvars.bbclass: use d.appendVar instead of d.setVar for SDK_TOOLCHAIN variable

[Jan Kiszka <jan.kiszka@siemens.com>]

On 25.05.23 06:53, Srinuvasan Arjunan wrote:
> 
> 
> On Monday, May 22, 2023 at 11:24:53 AM UTC+5:30 Jan Kiszka wrote:
> 
>     On 22.05.23 07:16, 'Jan Kiszka' via isar-users wrote:
>     > On 22.05.23 06:41, Srinuvasan Arjunan wrote:
>     >> From: Srinuvasan A <srinuv...@siemens.com>
>     >>
>     >> In downstream layer we may override the sdk_toolchain, but this
>     not works as
>     >> expected in latest ISAR, the reason behind this as they moved
>     toolchain
>     >> selection into python Anonymous function.
>     >
>     > Dod you want to append or do you want to replac SDK_TOOLCHAIN in
>     > downstream? In the latter case, we likely rather want to make our
>     > assignment in isar weak, no?
>     >
>     > if not d.getVar('SDK_TOOLCHAIN'):
>     > ...
>     >
> 
>     Also to answer: Why is SDK_PREINSTALL insufficient for your
>     customization?
> 
>     Jan
> 
>     -- 
>     Siemens AG, Technology
>     Competence Center Embedded Linux
> 
>  
> 
>     yes we can append our toolchain via SDK_PREINSTALL, but i need to
> replace with the "crossbuild-essential-${COMPAT_DISTRO_ARCH}" , this one
> comes via SDK_TOOLCHAIN variable, if i append " gcc-multilib
> g++-multilib" without removing the crossbuild-essential am facing broken
> package problem.
> Logs:
> 
>  Broken gcc-multilib:amd64 Conflicts on gcc-10-i686-linux-gnu:amd64 <
> none -> 10.2.1-6cross1 @un puN Ib >
>  |   Considering gcc-10-i686-linux-gnu:amd64 1 as a solution to
> gcc-multilib:amd64 10001
>  | Investigating (0) gcc-10-i686-linux-gnu:amd64 < none ->
> 10.2.1-6cross1 @un puN Ib >
> 
> Eventually I need to remove crossbuild-essential, but this one will do
> via SDK_TOOLCHAIN remove override , but this does not work in the
> downstream layer, because always ISAR's python anonymous function wins
> and set its value.

Ok, then we should actually implement a weak (?=) assignment in the
Python block, so that you can define your own SDK_TOOLCHAIN in such
scenarios.

Jan

-- 
Siemens AG, Technology
Competence Center Embedded Linux