Experimental Physics and
Industrial Control System

"Johnson, Andrew N." <[email protected]> · Thu, 27 Sep 2018 19:55:44 +0000

On 09/27/2018 02:29 PM, Marty Kraimer wrote:
> On 09/27/2018 07:18 AM, Ralph Lange wrote:
>> On Thu, 27 Sep 2018 at 09:53, Dirk Zimoch <[email protected]
>> <mailto:[email protected]>> wrote:
>>
>>     BTW: This leads to the question: If we have separate modules, why do
>>     they all install their headers to the same directory "pv" instead
>>     of one
>>     directory for each module?
>>
>>
>> Because they are parts of the same bundle of software (the V4 parts we
>> just recently decided to call "PVA").
>> The members pvData, pvAccess, pvDatabase, pvClient, pvNT, ... are
>> closely related, released as a bundle and share the same prefix "pv",
>> which was selected to determine the name for the include subdirectory.
>>
>> Cheers,
>> ~Ralph
>>
> So then what should be done?
> 
> What I have been doing is two things:
> 
> 1) All the copy modules will be accessed via include/pvcopy/*

I'm not terribly keen on our adding another include prefix directory,
especially for what is a fairly small API. I would rather that you just
rename the header file that pvDatabase provides, maybe call it pvCopy2.h
instead? That may be all you need to do at the moment.

> 2) All the copy code is in namespace epics::pvCopy

Okay.

> I have it working but exampleCPP/exampleLink fails.
> 
> I found the problem is that
> #include <pv/pvCopy.h>
> 
> appeared in pvaClent.h and in exampleLink.
> When I removed them all build.
> I have to do more more testing before I create a pull request for all of
> pvaClientCPP exampleCPP and pvDatabaseCPP.
> 
> But what do I do about Ralph's comment above?

I don't think you have to do anything about Ralph's comment, he was
responding to a question from Dirk.

- Andrew

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System