Re: #ifdef EPICS3_14

[Till Straumann <strauman@slac.stanford.edu>]

David M. Kline wrote:

> i use something like this:
> ------------------------------------------------------------------------------------------
> /* EPICS base version-specific definitions (must be performed first) */
> #include <epicsVersion.h>
> #define LT_EPICSBASE(v,r,l) ((EPICS_VERSION<=(v)) && 
> (EPICS_REVISION<=(r)) && (EPICS_MODIFICATION<(l)))
I believe your test is wrong - 3.13.8 would not pass 
LT_EPICBASE(3,14,6), i.e., would not reach
the #error statement

It should be

(  EPICS_VERSION<(v) ||
 (EPICS_VERSION==(v) && (  EPICS_REVISION < (r) ||
                                             ( EPICS_REVISION == (r) && 
EPICS_MODIFICATION < (l) )
                                             )
 )
)

BTW: wrong implementations can be found in gtr and other packages which 
illustrates
that having a correct version in a base header would make real sense. 
Applications could
then test

#if !defined(LT_EPICSBASE) || LT_EPICSBASE(x,y,z)
 #error
#endif

Regards
-- Till

> /* Evaluate EPICS base */
> #if LT_EPICSBASE(3,14,6)
>     #error "EPICS base must be 3.14.6 or greater"
> #endif
> ------------------------------------------------------------------------------------------
> you can make variations as well..
>
> tschuess!
> /david
>
>
> Steven Hartman wrote:
>
> > I have a number of EPICS 3.13 VxWorks device/drivers which I would like to
> > start using with EPICS 3.14, also with VxWorks. From the "Converting an
> > EPICS R3.13 application to R3.14.4" document, I see that the addition of
> > two lines is the minimum that is required.
> >
> > I would like to be able to maintain the same source code for both the 3.13
> > and 3.14 apps. So, what I would like to be able to do is something like:
> >
> > #ifdef EPICS3_14
> >  #include <epicsExport.h>
> >  . . .
> >  epicsExportAddress(dset,devFoo);
> > #endif
> >
> > My question is, Is there already an `official' identifier defined to use
> > for such preprocessor conditionals that I can use for this?
> >
> > Thanks,
> >  
>
> --
>
> +-------------------------------------------------+
> Argonne National Laboratory
> APS Operations Division (AOD)
> Beamline Controls and Data Acquisition (BCDA)
>
> EPICS Application Development and Beamline Support
> David M. Kline
> (630) 252-8639
> dkline@aps.anl.gov
> +-------------------------------------------------+
>