Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Fri, 9 Nov 2012 11:33:12 -0500

Hi Jens, Dirk,

On 09.11.2012 11:26, "Ing.- Büro Austel" wrote:
> using the free downloadable bcc55 compiler I get the error
>
> ../../../src/libCom/cxxTemplates/epicsOnce.cpp:
> Error E2316 ../../../src/libCom/cxxTemplates/epicsSingleton.h 112:
> 'epicsSingleton<TYPE>::reference::operator =(const
> epicsSingleton<TYPE>::reference &) is not a
> member of 'epicsSingleton<TYPE>::reference'
> ***1 error in Compile ***

Is bcc55 the old Borland C++ compiler, or have they published a new version 
recently?  What C++ standard does it recognize?  We used to support the 
Borland compiler quite a long time ago, but we dropped it because it wasn't 
keeping up with the C++ standards process.

On 2012-11-09 Dirk Zimoch wrote:
> It seems the "archaic Tornado gnu compiler" and bcc55 don't quite agree
> on what valid C++ template syntax looks like.
>
> The syntax looks strange to me, too. I simplified it to:
>
> reference & operator = ( const reference & );
>
> And it compiles fine with several gcc versions for Linux and as well
> with the gcc versions of vxWorks 5.5, 6.3 and 6.7. Maybe bcc is happy
> with this change, too?

> BTW: This is exactly how the operator = looked like in 3.14.8, except
> that it was private and is now public. Does anyone remember why it had
> been changed?

According to the commit that made this change, it was for the Tornado 2.0.2 
g++ compiler that came with vxWorks 5.4.2.  We don't support that compiler any 
more, so we could probaby switch the definition back now (Jeff Hill would have 
to agree to that), but if bcc55 is the old Borland compiler I don't think that 
will be sufficient.

- Andrew
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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System