Experimental Physics and
Industrial Control System

NICOLE Remi via Tech-talk <tech-talk at aps.anl.gov> · Wed, 3 Jan 2024 08:01:29 +0000

Hello SeokHo Moon,

from my understanding, the cross-compilation definitions in epics-base
are more an "example" than something which works out of the box.

In epics-base, like Han Lee said, the cross-compiler is defined in the
configure/os directory of epics-base. For your case, epics-base reads
CONFIG.linux-x86_64.linux-arm which includes CONFIG_SITE.linux-
x86.linux-arm which is where it says to use a xilinx toolchain.

What I think should fix your usecase:

In configure/CONFIG.site of epics-base and other EPICS support modules:

    CROSS_COMPILER_TARGET_ARCHS="linux-arm"

In CONFIG.linux-x86_64.linux-arm or CONFIG_SITE.linux-x86.linux-arm:

    GNU_TARGET="arm-linux-gnueabihf"
    # Remove the GNU_DIR assignment:
    # compiler and related are still under /usr/bin
    #GNU_DIR=/usr

To my knowledge, the CROSS_COMPILE environment variable is not used in
epics-base.

Cheers
-- 
Rémi NICOLE <remi.nicole at cea.fr>
CEA/DRF/IRFU/DIS/LDISC

On Thu, 2023-12-28 at 10:35 +0900, 문석호 via Tech-talk wrote:
> Hello epics users,
> 
> These days I try to do the cross compile from linux x86 to linux-arm.
> My host computer uses ubuntu system but the target device use the arm
> architecture so I try to do the cross compile. 
> I used epics in usual x86 system or rasberrypi but I have not used
> the cross compile in epics. Therefore, I can not imagine the sequence
> of the cross compile in epics. 
> 
> If I want to use the cross compile at epics, should I do the cross
> compile for the epics-base and other supporting modules like asyn,
> sequencer, autosave, and etc? 
> 
> If that is right, I also face some other problem in epics-base
> compile. It compiled well but it face some problem when I give cross
> compile option. 
> At first I set the "CROSS_COMPILER_TARGET_ARCHS=linux-arm" at
> /configure/CONFIG_SITE and type  "export CROSS_COMPILE=arm-linux-
> gnueabihf-", "export ARCH=arm" to do make. 
> However, it says they can not found 'arm-xilinx-linux-gnueabi-gcc'. I
> installed the  'arm-linux-gnueabihf' because I heard that the target
> device has hard float. Does the error comes out because of some path?
> or is there any setting, I should do? 
> 
> Best Regards
> SeokHo Moon
> 

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System