Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Tue, 28 Nov 2017 18:05:41 -0600

Hi Timo,

On 11/28/2017 10:46 AM, Timo Korhonen wrote:
> Referring to Dirk's request earlier in this chain:
> 
> So it would be nice to have an option in one of the CONFIG files to
> declare that a specific architecture should build EPICS 7 without PVA
> support.
> 
> 
> If I understand the intention right, he would like to be able to build the
> EPICS 7 base for many architectures but so that not all of them are
> required to support PVA.
> 
> I think that is a legitimate request: this way he can keep up with the
> other updates in the base and does not have to abandon (at least
> immediately) those architectures that are not able to support PVA.
> 
> I think this could make the adoption of EPICS 7 easier not only for Dirk
> but for other sites, too. The change does not look impossible to me.

I agree that this is worthwhile goal, but I'm not sure how easy it will
be to implement at this stage. The complication is that GNUmake descends
through the tree just once, and it's not until it gets to the bottom
Makefiles that it decides which target architectures to compile the code
for. I don't want to have to edit every Makefile and put a conditional
test in them, but I might be able to do something in the modules' own
configure/CONFIG files.

I can't promise anything for the -rc1, but I will try to implement
something for the final release if I can do so cleanly.

- Andrew

-- 
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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System