Experimental Physics and
Industrial Control System

Mark Rivers <[email protected]> · Thu, 19 Dec 2013 17:40:43 +0000

Looking at shareLib.h it looks to me like epicsShareDef is only defined to be anything on VAXC.

For _WIN32 and __CYGWIN32__ it is the following

#   define epicsShareDef

Mark

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Andrew Johnson
Sent: Thursday, December 19, 2013 10:55 AM
To: Heesterman, Peter J
Cc: [email protected]
Subject: Re: Build of seq-2.1.15 with VS 2010 fails.

On 12/19/2013 05:37 AM, Heesterman, Peter J wrote:
> I have built seq-2.1.15 recently (VS2010), and experienced a similar problem.
> 
> The variable needs to be defined as epicsShareExtern - see attached file.

I haven't tried building this code on Windows, but I actually think the
variable should be marked epicsShareDef in the seq_if.c file where it is
defined, and epicsShareExtern in any header file that declares it.  The
rules for the various epicsShare* markers are explained in comments at
the top of the shareLib.h file; marking the seq_if.c version as
epicsShareExtern would be telling the compiler that the variable is
defined in some *other* file, but here it is actually being given a
value so this must be the definition (and hence epicsShareDef).

- Andrew
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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System