Cross-compiling epics for petalinux

[Donny Domagoj Cosic via Tech-talk <tech-talk at aps.anl.gov>]

Hello,

I hope you all had a happy and restful holidays.
I started playing with Petalinux on my KC705 board before the holidays 
and successfully get Petalinux to boot. Now I am trying to cross compile 
EPICS base to run it on the Microblaze but I am running into some 
compile problems which are making me think I am doing something wrong. 
Any advice or suggestion from your experience would be greatly 
appreciated.
I have the 2024.1 version of Petalinux along with the rest of the Xilinx 
(AMD) tools installed on a Ubuntu 22.04.5 LTS. I used the provided BSP 
which boots successfully and from it I generated the SDK which contains 
the sysroots. Sysroots contains 2 folders: 
"microblazeel-v11.0-bs-cmp-re-mh-div-fb-xilinx-linux" and 
"x86_64-petalinux-linux". The "x86_64-petalinux-linux" folder contains 
the compilers.
I edited the CONFIG_SITE in /configure
-> CROSS_COMPILER_TARGET_ARCHS=linux-microblaze

I edited the CONFIG_SITE.Common.linux-microblaze file in /configure/os
-> GNU_DIR = 
/home/donny/Xilinx/KC705_Petalinux/images/linux/sdk/sysroots
-> GNU_TARGET=microblazeel-v11.0-bs-cmp-re-mh-div-fb-xilinx-linux

When I try to compile the linux-x86_64 compiles without a problem 
finding the compilers. But when compiling linux-microblaze it does not 
find the compilers because there are not in the 
"microblazeel-v11.0-bs-cmp-re-mh-div-fb-xilinx-linux" folder. If i 
manually add the locations of the compilers in the 
CONFIG_SITE.Common.linux-microblaze file:
CC = 
/home/donny/Xilinx/KC705_Petalinux/images/linux/sdk/sysroots/x86_64-petalinux-linux/usr/bin/microblazeel-xilinx-linux/microblazeel-xilinx-linux-gcc
CCC = 
/home/donny/Xilinx/KC705_Petalinux/images/linux/sdk/sysroots/x86_64-petalinux-linux/usr/bin/microblazeel-xilinx-linux/microblazeel-xilinx-linux-g++
LD = 
home/donny/Xilinx/KC705_Petalinux/images/linux/sdk/sysroots/x86_64-petalinux-linux/usr/bin/microblazeel-xilinx-linux/microblazeel-xilinx-linux-ld
AR = 
home/donny/Xilinx/KC705_Petalinux/images/linux/sdk/sysroots/x86_64-petalinux-linux/usr/bin/microblazeel-xilinx-linux/microblazeel-xilinx-linux-ar
When i try to make using this configurations i get the following error:
/home/donny/Xilinx/KC705_Petalinux/images/linux/sdk/sysroots/x86_64-petalinux-linux/usr/lib/microblazeel-xilinx-linux/gcc/microblazeel-xilinx-linux/12.2.0/include-fixed/limits.h:203:75: 
error: no include path in which to search for limits.h
I think this is because it is using the wrong include folder, it should 
be using the one from the microblazeel directory. If i edit 
GNU_TARGET_INCLUDE_DIR and GNU_TARGET_LIB_DIR it compiles further but 
then cannot find sub directories that are required. This makes me think 
that this is not the proper way resolve this problem.
I hope someone has some experience with this as any advice would be very 
welcome, I cannot think of anything else to try.
Regards,
--
Donny Domagoj Cosic

Laboratory for Ion Beam Interactions
Ruđer Bošković Institute
Bijenička cesta 54 | HR-10 000 Zagreb | CROATIA
T: +385 1 4561 041 | @: dcosic at irb.hr | https://urldefense.us/v3/__http://www.irb.hr__;!!G_uCfscf7eWS!cYy97Vvb1bRvbno_UwIAm8f-TUPZwig_qQNEfkjHC23jnGFlnJU4DjYH42ihbdoutL7Hq-0kjJvIK0Zlzm-hODxaVXHkWNWQ$