Experimental Physics and
Industrial Control System

Mark Rivers <[email protected]> · Mon, 13 Feb 2012 14:04:14 +0000

Hi Ben,

Everything in asyn is currently programmed in C except asynPortDriver, which is programmed in C++.  It is asynPortDriver that will not build on vxWorks 5.4.2.  You could probably just comment out asynPortDriver in the Makefile for what you need asyn for on vxWorks.  It is crashing the compiler on the new version of asynPortDriver on this statement:

#include <stdexcept>

That is used many places in base, which builds OK on vxWorks, so I am not sure why it is crashing in asynPortDriver.

The asyn device support for arrays, (devAsynInt8Array, devAsynInt16Array, devAsynIn32Array, devAsynFloat32Array, devAsynFloat64Array) are currently written in C with a giant 4-page macro because they only differ in data types, etc.  It is not pretty.  That is a natural thing to rewrite using C++ template functions.  But in trying to that it also crashed on vxWorks 5.4.2.

Mark

________________________________________
From: [email protected] [[email protected]] on behalf of Benjamin Franksen [[email protected]]
Sent: Monday, February 13, 2012 7:47 AM
To: [email protected]
Subject: Re: asyn and vxWorks 5.4.2 and earlier

On Friday, February 10, 2012, Mark Rivers wrote:
> John Hammonds and I have been doing some improvements to asyn that
> involve using C++ template functions and C++ exceptions.

I thought asyn was programmed in C, not C++?

> We have found
> a serious problem with the vxWorks cross-compilers running under Linux
> with vxWorks 5.4.2 (and presumably earlier versions as well).  The
> cross-compilers crash on valid C++ code.  This problem does not occur on
> vxWorks 5.5.2, nor on Linux, Windows, etc.
>
> My question to the community: will it be a serious problem if the next
> release of asyn cannot be built on vxWorks 5.4.2 and earlier?  Are there
> sites that would plan to upgrade asyn but continue to use vxWorks 5.4.2
> or earlier?

Yes, we are still using 5.4.2 and we have not yet decided whether to upgrade
VxWorks or rather switch to RTEMS. We may decide this year, but it is not
clear how long it will take use to complete the upgrade/switch, once the
decision is made. I would not be happy if it turns out we can no longer
compile new versions of asyn, especially since many modules depend on it
(e.g. most of the stuff in synApps).

Cheers
Ben

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System