how to cross compile 4.19 BSP?

[Philip C]

sorry folks,  my EXPORT was messed up.

I downloaded gcc-arm-10.3-2021.07-x86_64-aarch64-none-linux-gnu.tar.xz 
and unpacked it again

export ARCH=arm64
export 
CROSS_COMPILE=/home/philip/gcc-arm/10.3/gcc-arm-10.3-2021.07-x86_64-aarch64-none-linux-gnu/bin/aarch64-none-linux-gnu-

If I do make menuconfig and save it (so a default .config) I still fail 
with this:-

   CC      mm/page_counter.o
   CC      mm/memcontrol.o
mm/memcontrol.c: In function 'memcg_stat_show':
mm/memcontrol.c:3542:1: warning: the frame size of 1040 bytes is larger 
than 1024 bytes [-Wframe-larger-than=]
error, forbidden warning:memcontrol.c:3542
  3542 | }
       | ^
mm/memcontrol.c: In function 'memory_stat_show':
mm/memcontrol.c:5709:1: warning: the frame size of 1040 bytes is larger 
than 1024 bytes [-Wframe-larger-than=]
error, forbidden warning:memcontrol.c:5709
  5709 | }
       | ^
make[1]: *** [scripts/Makefile.build:334: mm/memcontrol.o] Error 1
make: *** [Makefile:1194: mm] Error 2


On 06/02/2022 12:48, Philip C wrote:
> I am sorry if this list is not exactly the right place for this 
> question, but I don't know where to ask.
> 
> Until mainline supports the DSI/LCD output I need something that I can 
> use for my project based on an RK3566 with an LCD screen.
> 
> So I have been trying (and failing) to compile the 4.19-develop branch 
> of https://github.com/rockchip-linux/kernel
> 
> I have been using this cross compiler:-
> gcc-arm-10.3-2021.07-x86_64-aarch64-none-linux-gnu
> 
> using these commands:-
> export ARCH=arm64
> export 
> CROSS_COMPILE=/home/philip/gcc-arm-10.3-2021.07-x86_64-aarch64-none-linux-gnu/bin/aarch64-none-linux-gnu- 
> 
> make Image modules
> make dtbs
> 
> This works on other kernels, but with the official kernel source I get 
> many, many errors which are probably beyond my abilities to fix.  For 
> example I can compile Radxa Team 4.19 kernels, but my project isn't a 
> Radxa product.
> 
> Three questions:-
> 
> 1. Should I be using branch 4.19-develop? or 4.19-develop-rt87?
> 2. Is there a particular OS/version and cross compiler that I should be 
> using?  Currently I am on ubuntu hirsute but I have no problem to change 
> it to something else.
> 3. If this isn't the right place to ask then please where is?
> 
> thanks, Philip
> 
>