Re: EPICS on ARM (continued)

[Dirk Zimoch <dirk.zimoch@psi.ch>]

Hi Emmanuel,

For each cross compile architecture you have several configuration 
files. Let's have a look on linux-arm (in configure/os):
> ls -1 *linux-arm*
CONFIG.Common.linux-arm
CONFIG.Common.linux-arm_eb
CONFIG.Common.linux-arm_el
CONFIG.linux-x86.linux-arm
CONFIG.linux-x86.linux-arm_eb
CONFIG.linux-x86.linux-arm_el
CONFIG_SITE.linux-x86.linux-arm
CONFIG_SITE.linux-x86.linux-arm_eb
CONFIG_SITE.linux-x86.linux-arm_el

So we have 3 different cross architectures here (linux-arm, 
linux-arm_eb, linux-arm_el). Select one as your starting point.

Either modify the corresponding files (eg. for linux-arm_el:)
CONFIG.Common.linux-arm_el
CONFIG.linux-x86.linux-arm_el
CONFIG_SITE.linux-x86.linux-arm_el

or make your own files (*.linux-armv4l), copy or include the existing 
files and overwrite what is different yor you.

Then you add the cross architecture to CROSS_COMPILER_TARGET_ARCHS 
(either in CONFIG or CONFIG_SITE or CONFIG_SITE.linux-x86.Common) and 
run make.

If you have further questions, please ask.
Dirk

emmanuel_mayssat@lynceantech.com wrote:
> Rod,
>
> I am basically trying to compile EPICS for the TS7370 (arm based arch).
> How I achieve this is not important to me.
>
> I looked at the TS cross toolchain.
> I understand I am supposed to change my makefiles following 
> > CROSS = /opt/crosstool/gcc-3.3.4-glibc-2.3.2/bin/arm-linux-
> > CC = $(CROSS)gcc
>
> but how do I do that in EPICS?
> I am not even sure how to correctly setup a target architecture...
> export T_A=linux-arm; make
> or even make T_A=linux-arm
> seem to work. 
> My target EPICS_HOST_ARCH is linux-armv4l
> My host is linux 64 bit. 
> It seems I need to create the files 
> CONFIG.linux-x86_64.armv4tl
> CONFIG_SITE.linux-x86.linux-armv4tl
> CONFIG.Common.linux-armv4tl
>
> I copied ../configure/os/CONFIG...linux-arm... files to compile
>
> But I run into several issues...
>
> Is there any resource for cross compiling on EPICS?
> Any other info on how you achieve to run epics on a TS7370 is welcome.
>
> On 08:57 Mon 25 Oct     , Rod Nussbaumer wrote:
> > I have also been able to cross compile EPICS and other applications  
> > using the Technologics Systems cross toolchain, but am not using that  
> > for production work.