Experimental Physics and
Industrial Control System

"Cusick, Martin-Lee" <[email protected]> · Thu, 10 Dec 2015 08:09:00 -0500

UNRESTRICTED  /  ILLIMITÉE

Thank you gentlemen:

Michael: Thanks for the clarity

Andrew: Thanks for the options, and I love the tag line.

Wesley: Thanks for helping out, that is how I set my CONFIG_SITE file, but it is not completely building the x86 version.

So to keep with the TMTOWTDI, I set my EPICS_HOST_ARCH variable to use `EpicsHostArch` in .bashrc because all three system types are running Debian and logon as a specific user.

So to provide Mark with what he needs I'll set my host arch to be x86 and build and post the results sometime today.

Regards,

Lee

-----Original Message-----
From: Wesley Moore [mailto:[email protected]] 
Sent: December-09-15 4:59 PM
To: Cusick, Martin-Lee
Cc: Andrew Johnson; Michael Davidsaver; Mark Rivers; EPICS tech-talk
Subject: Re: [External] RE: EPICS BASE-3.14.12.3 32-bit Binaries on 64-bit host Machine

As Andrew said, TMTOWTDI:

Use base/configure/CONFIG_SITE to set everything.

CROSS_COMPILER_TARGET_ARCHS=linux-x86 linux-arm-rpi
CROSS_COMPILER_HOST_ARCHS=linux-x86_64

Then run make on your 64-bit machine and all 3 will build.  But, if you set your environmental variable EPICS_HOST_ARCH to linux-x86, it will only build linux-x86.  

Wesley

> On Dec 9, 2015, at 4:54 PM, Andrew Johnson <[email protected]> wrote:
> 
> On 12/09/2015 03:40 PM, Michael Davidsaver wrote:
>> On 12/09/2015 04:27 PM, Cusick, Martin-Lee wrote:
>>> So I just need some clarity on where you want the EPICS_HOST_ARCH variable set.
>> 
>> The simplest thing to do is not to set it at all.  This used to be a
>> requirement and the build would fail without it.  With recent Base
>> releases this variable will be automatically set by Make each time it
>> runs if it is not set in the process environment.
> 
> This approach is fine for just building EPICS code, but there may be
> other reasons why you might want to set it; in our case the same system
> script that sets the variable also sets the user's PATH to include the
> /usr/local/epics/extensions/bin/$EPICS_HOST_ARCH directory (plus some
> other similar paths) so it needs to determine what the architecture is
> at login time anyway. Michael's Debian installations probably put all of
> their EPICS executables into /usr/bin or /usr/local/bin anyway so his
> users don't normally need the variable set, whereas ours do and we set
> it in a script that gets sourced through /etc/profile.d or the equivalent.
> 
> I think my main point is There's More Than One Way To Do It (TMTOWTDI)
> so you'll have to work out for yourself what makes the most sense in
> your circumstance.
> 
> - Andrew
> 
> -- 
> Light thinks it travels faster than anything but it is wrong.
> No matter how fast light travels, it finds the darkness has
> always got there first, and is waiting for it.
>    -- Terry Pratchett, Reaper Man

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System